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/*
* Copyright (c) 1998, 2021 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2018, 2021 IBM Corporation. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation from Oracle TopLink
// 12/30/2010-2.3 Guy Pelletier
// - 312253: Descriptor exception with Embeddable on DDL gen
// 07/27/2012-2.5 Chris Delahunt
// - 371950: Metadata caching
// 10/25/2012-2.5 Guy Pelletier
// - 374688: JPA 2.1 Converter support
// 02/11/2013-2.5 Guy Pelletier
// - 365931: @JoinColumn(name="FK_DEPT",insertable = false, updatable = true) causes INSERT statement to include this data value that it is associated with
// 02/14/2018-2.7.2 Lukas Jungmann
// - 530680: embedded element collection within an entity of protected isolation does not merged changes into clones correctly
// 03/14/2018-2.7 Will Dazey
// - 500753: Synchronize initialization of InsertQuery
package org.eclipse.persistence.mappings;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.Vector;
import org.eclipse.persistence.descriptors.ClassDescriptor;
import org.eclipse.persistence.descriptors.DescriptorEvent;
import org.eclipse.persistence.descriptors.DescriptorEventManager;
import org.eclipse.persistence.descriptors.changetracking.AttributeChangeTrackingPolicy;
import org.eclipse.persistence.descriptors.changetracking.DeferredChangeDetectionPolicy;
import org.eclipse.persistence.descriptors.changetracking.ObjectChangeTrackingPolicy;
import org.eclipse.persistence.exceptions.ConversionException;
import org.eclipse.persistence.exceptions.DatabaseException;
import org.eclipse.persistence.exceptions.DescriptorException;
import org.eclipse.persistence.exceptions.OptimisticLockException;
import org.eclipse.persistence.exceptions.QueryException;
import org.eclipse.persistence.expressions.Expression;
import org.eclipse.persistence.expressions.ExpressionBuilder;
import org.eclipse.persistence.expressions.ExpressionMath;
import org.eclipse.persistence.indirection.IndirectList;
import org.eclipse.persistence.indirection.ValueHolder;
import org.eclipse.persistence.internal.descriptors.DescriptorIterator;
import org.eclipse.persistence.internal.descriptors.ObjectBuilder;
import org.eclipse.persistence.internal.expressions.SQLUpdateStatement;
import org.eclipse.persistence.internal.helper.ConversionManager;
import org.eclipse.persistence.internal.helper.DatabaseField;
import org.eclipse.persistence.internal.helper.DatabaseTable;
import org.eclipse.persistence.internal.helper.IdentityHashSet;
import org.eclipse.persistence.internal.helper.NonSynchronizedVector;
import org.eclipse.persistence.internal.identitymaps.CacheId;
import org.eclipse.persistence.internal.identitymaps.CacheKey;
import org.eclipse.persistence.internal.mappings.converters.AttributeNameTokenizer.TokensIterator;
import org.eclipse.persistence.internal.queries.AttributeItem;
import org.eclipse.persistence.internal.queries.ContainerPolicy;
import org.eclipse.persistence.internal.queries.JoinedAttributeManager;
import org.eclipse.persistence.internal.sessions.AbstractRecord;
import org.eclipse.persistence.internal.sessions.AbstractSession;
import org.eclipse.persistence.internal.sessions.AggregateCollectionChangeRecord;
import org.eclipse.persistence.internal.sessions.ChangeRecord;
import org.eclipse.persistence.internal.sessions.MergeManager;
import org.eclipse.persistence.internal.sessions.ObjectChangeSet;
import org.eclipse.persistence.internal.sessions.UnitOfWorkChangeSet;
import org.eclipse.persistence.internal.sessions.UnitOfWorkImpl;
import org.eclipse.persistence.mappings.converters.Converter;
import org.eclipse.persistence.mappings.foundation.MapComponentMapping;
import org.eclipse.persistence.queries.DataModifyQuery;
import org.eclipse.persistence.queries.DatabaseQuery;
import org.eclipse.persistence.queries.DeleteAllQuery;
import org.eclipse.persistence.queries.DeleteObjectQuery;
import org.eclipse.persistence.queries.InsertObjectQuery;
import org.eclipse.persistence.queries.ModifyQuery;
import org.eclipse.persistence.queries.ObjectBuildingQuery;
import org.eclipse.persistence.queries.ObjectLevelModifyQuery;
import org.eclipse.persistence.queries.ObjectLevelReadQuery;
import org.eclipse.persistence.queries.QueryByExamplePolicy;
import org.eclipse.persistence.queries.ReadAllQuery;
import org.eclipse.persistence.queries.ReadQuery;
import org.eclipse.persistence.queries.UpdateObjectQuery;
import org.eclipse.persistence.queries.WriteObjectQuery;
import org.eclipse.persistence.sessions.CopyGroup;
import org.eclipse.persistence.sessions.DatabaseRecord;
import org.eclipse.persistence.sessions.Project;
import org.eclipse.persistence.sessions.remote.DistributedSession;
/**
* Purpose: The aggregate collection mapping is used to represent the aggregate relationship between a single
* source object and a collection of target objects. The target objects cannot exist without the existence of the
* source object (privately owned)
* Unlike the normal aggregate mapping, there is a target table being mapped from the target objects.
* Unlike normal 1:m mapping, there is no 1:1 back reference mapping, as foreign key constraints have been resolved by the aggregation.
*
* @author King (Yaoping) Wang
* @since TOPLink/Java 3.0
*/
public class AggregateCollectionMapping extends CollectionMapping implements RelationalMapping, MapComponentMapping, EmbeddableMapping {
/** This is a key in the target table which is a foreign key in the target table. */
protected Vector targetForeignKeyFields;
/** This is a primary key in the source table that is used as foreign key in the target table */
protected Vector sourceKeyFields;
/** Foreign keys in the target table to the related keys in the source table */
protected Map targetForeignKeyToSourceKeys;
/** Map the name of a field in the aggregate collection descriptor to a field in the actual table specified in the mapping. */
protected Map aggregateToSourceFields;
/** Map the name of an attribute of the reference descriptor mapped with AggregateCollectionMapping to aggregateToSourceFieldNames
* that should be applied to this mapping.
*/
protected Map> nestedAggregateToSourceFields;
/**
* List of converters to apply at initialize time to their cloned aggregate mappings.
*/
protected Map converters;
/** In RemoteSession case the mapping needs the reference descriptor serialized from the server,
* but referenceDescriptor attribute defined as transient in the superclass. To overcome that
* in non-remote case referenceDescriptor is assigned to remoteReferenceDescriptor; in remote - another way around.
*/
protected ClassDescriptor remoteReferenceDescriptor;
/** Default source table that should be used with the default source fields of this mapping. */
protected DatabaseTable defaultSourceTable;
/** Indicates whether the entire target object is primary key - in that case the object can't be updated in the db,
* but rather deleted and then re-inserted.
*/
protected boolean isEntireObjectPK;
/** These queries used to update listOrderField
*/
protected transient DataModifyQuery updateListOrderFieldQuery;
protected transient DataModifyQuery bulkUpdateListOrderFieldQuery;
protected transient DataModifyQuery pkUpdateListOrderFieldQuery;
/** indicates whether listOrderField value could be updated in the db. Used only if listOrderField!=null */
protected boolean isListOrderFieldUpdatable;
protected static final String min = "min";
protected static final String max = "max";
protected static final String shift = "shift";
protected static final String pk = "pk";
protected static final String bulk = "bulk";
/**
* Indicates whether the mapping (or at least one of its nested mappings, at any nested depth)
* references an entity.
* To return true the mapping (or nested mapping) should be ForeignReferenceMapping with non-null and non-aggregate reference descriptor.
* Lazily initialized.
*/
protected Boolean hasNestedIdentityReference;
/**
* PUBLIC:
* Default constructor.
*/
public AggregateCollectionMapping() {
this.aggregateToSourceFields = new HashMap(5);
this.nestedAggregateToSourceFields = new HashMap<>(5);
this.converters = new HashMap<>();
this.targetForeignKeyToSourceKeys = new HashMap(5);
this.sourceKeyFields = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(1);
this.targetForeignKeyFields = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(1);
this.deleteAllQuery = new DeleteAllQuery();
//aggregates should always cascade all operations
this.setCascadeAll(true);
this.isListOrderFieldSupported = true;
this.isListOrderFieldUpdatable = true;
this.isPrivateOwned = true;
}
/**
* INTERNAL:
*/
@Override
public boolean isRelationalMapping() {
return true;
}
/**
* INTERNAL:
* In JPA users may specify overrides to apply to a many to many mapping
* on a shared embeddable descriptor. These settings are applied at
* initialize time, after the reference descriptor is cloned. In an
* aggregate collection case, this is not supported and currently silently
* ignored and does nothing.
*/
@Override
public void addOverrideManyToManyMapping(ManyToManyMapping mapping) {
// Not supported at this time ...
}
/**
* INTERNAL:
* In JPA users may specify overrides to apply to a unidirectional one to
* many mapping on a shared embeddable descriptor. These settings are
* applied at initialize time, after the reference descriptor is cloned. In
* an aggregate collection case, this is not supported and currently
* silently ignored and does nothing.
*/
@Override
public void addOverrideUnidirectionalOneToManyMapping(UnidirectionalOneToManyMapping mapping) {
// Not supported at this time ...
}
/**
* Add a converter to be applied to a mapping of the aggregate descriptor.
*/
@Override
public void addConverter(Converter converter, String attributeName) {
converters.put(attributeName, converter);
}
/**
* PUBLIC:
* Maps a field name in the aggregate descriptor
* to a field name in the source table.
*/
public void addFieldNameTranslation(String sourceFieldName, String aggregateFieldName) {
addFieldTranslation(new DatabaseField(sourceFieldName), aggregateFieldName);
}
/**
* PUBLIC:
* Maps a field name in the aggregate descriptor
* to a field in the source table.
*/
@Override
public void addFieldTranslation(DatabaseField sourceField, String aggregateField) {
aggregateToSourceFields.put(aggregateField, sourceField);
}
/**
* PUBLIC:
*
* Maps a field name in the aggregate descriptor
* to a field name in the source table.
*/
public void addFieldTranslations(Map map) {
aggregateToSourceFields.putAll(map);
}
/**
* PUBLIC:
* Map the name of an attribute of the reference descriptor mapped with AggregateCollectionMapping to aggregateToSourceFieldNames
* that should be applied to this mapping.
*/
public void addNestedFieldNameTranslation(String attributeName, String sourceFieldName, String aggregateFieldName) {
addNestedFieldTranslation(attributeName, new DatabaseField(sourceFieldName), aggregateFieldName);
}
/**
* PUBLIC:
* Map the name of an attribute of the reference descriptor mapped with AggregateCollectionMapping to aggregateToSourceFieldNames
* that should be applied to this mapping.
*/
@Override
public void addNestedFieldTranslation(String attributeName, DatabaseField sourceField, String aggregateFieldName) {
Map attributeFieldNameTranslation = nestedAggregateToSourceFields.get(attributeName);
if (attributeFieldNameTranslation == null) {
attributeFieldNameTranslation = new HashMap<>(5);
nestedAggregateToSourceFields.put(attributeName, attributeFieldNameTranslation);
}
attributeFieldNameTranslation.put(aggregateFieldName, sourceField);
}
/**
* PUBLIC:
* Map the name of an attribute of the reference descriptor mapped with AggregateCollectionMapping to aggregateToSourceFields
* that should be applied to this mapping.
*/
public void addNestedFieldNameTranslations(String attributeName, Map map) {
Map attributeFieldNameTranslation = nestedAggregateToSourceFields.get(attributeName);
if (attributeFieldNameTranslation == null) {
nestedAggregateToSourceFields.put(attributeName, map);
} else {
attributeFieldNameTranslation.putAll(map);
}
}
/**
* PUBLIC:
* Define the target foreign key relationship in the 1-M aggregate collection mapping.
* Both the target foreign key field and the source primary key field must be specified.
*/
@Override
public void addTargetForeignKeyField(DatabaseField targetForeignKey, DatabaseField sourceKey) {
getTargetForeignKeyFields().addElement(targetForeignKey);
getSourceKeyFields().addElement(sourceKey);
}
/**
* PUBLIC:
* Define the target foreign key relationship in the 1-M aggregate collection mapping.
* Both the target foreign key field name and the source primary key field name must be specified.
*/
public void addTargetForeignKeyFieldName(String targetForeignKey, String sourceKey) {
addTargetForeignKeyField(new DatabaseField(targetForeignKey), new DatabaseField(sourceKey));
}
/**
* INTERNAL:
* Used during building the backup shallow copy to copy the vector without re-registering the target objects.
*/
@Override
public Object buildBackupCloneForPartObject(Object attributeValue, Object clone, Object backup, UnitOfWorkImpl unitOfWork) {
ContainerPolicy containerPolicy = getContainerPolicy();
if (attributeValue == null) {
return containerPolicy.containerInstance(1);
}
Object clonedAttributeValue = containerPolicy.containerInstance(containerPolicy.sizeFor(attributeValue));
if (isSynchronizeOnMerge) {
synchronized (attributeValue) {
for (Object valuesIterator = containerPolicy.iteratorFor(attributeValue);
containerPolicy.hasNext(valuesIterator);) {
Object wrappedElement = containerPolicy.nextEntry(valuesIterator, unitOfWork);
Object cloneValue = buildElementBackupClone(containerPolicy.unwrapIteratorResult(wrappedElement), unitOfWork);
containerPolicy.addInto(containerPolicy.keyFromIterator(valuesIterator), cloneValue, clonedAttributeValue, unitOfWork);
}
}
} else {
for (Object valuesIterator = containerPolicy.iteratorFor(attributeValue);
containerPolicy.hasNext(valuesIterator);) {
Object wrappedElement = containerPolicy.nextEntry(valuesIterator, unitOfWork);
Object cloneValue = buildElementBackupClone(containerPolicy.unwrapIteratorResult(wrappedElement), unitOfWork);
containerPolicy.addInto(containerPolicy.keyFromIterator(valuesIterator), cloneValue, clonedAttributeValue, unitOfWork);
}
}
return clonedAttributeValue;
}
/**
* INTERNAL:
* Require for cloning, the part must be cloned.
* Ignore the objects, use the attribute value.
* this is identical to the super class except that the element must be added to the new
* aggregates collection so that the referenced objects will be cloned correctly
*/
@Override
public Object buildCloneForPartObject(Object attributeValue, Object original, CacheKey cacheKey, Object clone, AbstractSession cloningSession, Integer refreshCascade, boolean isExisting, boolean isFromSharedCache) {
ContainerPolicy containerPolicy = getContainerPolicy();
if (attributeValue == null) {
return containerPolicy.containerInstance(1);
}
Object clonedAttributeValue = containerPolicy.containerInstance(containerPolicy.sizeFor(attributeValue));
Object temporaryCollection = null;
if (isSynchronizeOnMerge) {
// I need to synchronize here to prevent the collection from changing while I am cloning it.
// This will occur when I am merging into the cache and I am instantiating a UOW valueHolder at the same time
// I can not synchronize around the clone, as this will cause deadlocks, so I will need to copy the collection then create the clones
// I will use a temporary collection to help speed up the process
synchronized (attributeValue) {
temporaryCollection = containerPolicy.cloneFor(attributeValue);
}
} else {
temporaryCollection = attributeValue;
}
for (Object valuesIterator = containerPolicy.iteratorFor(temporaryCollection);
containerPolicy.hasNext(valuesIterator);) {
Object wrappedElement = containerPolicy.nextEntry(valuesIterator, cloningSession);
Object originalElement = containerPolicy.unwrapIteratorResult(wrappedElement);
//need to add to aggregate list in the case that there are related objects.
if (cloningSession.isUnitOfWork() && ((UnitOfWorkImpl)cloningSession).isOriginalNewObject(original)) {
((UnitOfWorkImpl)cloningSession).addNewAggregate(originalElement);
}
Object cloneValue = buildElementClone(originalElement, clone, cacheKey, refreshCascade, cloningSession, isExisting, isFromSharedCache);
Object clonedKey = containerPolicy.buildCloneForKey(containerPolicy.keyFromIterator(valuesIterator), clone, cacheKey, refreshCascade, cloningSession, isExisting, isFromSharedCache);
containerPolicy.addInto(clonedKey, cloneValue, clonedAttributeValue, cloningSession);
}
if(temporaryCollection instanceof IndirectList) {
((IndirectList)clonedAttributeValue).setIsListOrderBrokenInDb(((IndirectList)temporaryCollection).isListOrderBrokenInDb());
}
return clonedAttributeValue;
}
/**
* INTERNAL:
* Clone the aggregate collection, if necessary.
*/
protected Object buildElementBackupClone(Object element, UnitOfWorkImpl unitOfWork) {
// Do not clone for read-only.
if (unitOfWork.isClassReadOnly(element.getClass(), getReferenceDescriptor())) {
return element;
}
ClassDescriptor aggregateDescriptor = getReferenceDescriptor(element.getClass(), unitOfWork);
Object clonedElement = aggregateDescriptor.getObjectBuilder().buildBackupClone(element, unitOfWork);
return clonedElement;
}
/**
* INTERNAL:
* Clone the aggregate collection, if necessary.
*/
@Override
public Object buildElementClone(Object element, Object parent, CacheKey parentCacheKey, Integer refreshCascade, AbstractSession cloningSession, boolean isExisting, boolean isFromSharedCache) {
// Do not clone for read-only.
if (cloningSession.isUnitOfWork() && cloningSession.isClassReadOnly(element.getClass(), getReferenceDescriptor())) {
return element;
}
ClassDescriptor aggregateDescriptor = getReferenceDescriptor(element.getClass(), cloningSession);
// bug 2612602 as we are building the working copy make sure that we call to correct clone method.
Object clonedElement = aggregateDescriptor.getObjectBuilder().instantiateWorkingCopyClone(element, cloningSession);
aggregateDescriptor.getObjectBuilder().populateAttributesForClone(element, parentCacheKey, clonedElement, refreshCascade, cloningSession);
if (cloningSession.isUnitOfWork()){
// CR 4155 add the originals to the UnitOfWork so that we can find it later in the merge
// as aggregates have no identity. If we don't do this we will loose indirection information.
((UnitOfWorkImpl)cloningSession).getCloneToOriginals().put(clonedElement, element);
}
return clonedElement;
}
/**
* INTERNAL:
* In case Query By Example is used, this method builds and returns an expression that
* corresponds to a single attribute and it's value.
*/
@Override
public Expression buildExpression(Object queryObject, QueryByExamplePolicy policy, Expression expressionBuilder, Map processedObjects, AbstractSession session) {
if (policy.shouldValidateExample()){
throw QueryException.unsupportedMappingQueryByExample(queryObject.getClass().getName(), this);
}
return null;
}
/**
* INTERNAL:
* This method is used to store the FK fields that can be cached that correspond to noncacheable mappings
* the FK field values will be used to re-issue the query when cloning the shared cache entity
*/
@Override
public void collectQueryParameters(Set cacheFields){
for (DatabaseField field : getSourceKeyFields()) {
cacheFields.add(field);
}
}
/**
* INTERNAL:
* Convert all the class-name-based settings in this mapping to actual
* class-based settings. This method is used when converting a project that
* has been built with class names to a project with classes.
* @param classLoader Where to search for classes.
*/
@Override
public void convertClassNamesToClasses(ClassLoader classLoader) {
super.convertClassNamesToClasses(classLoader);
for (Converter converter : converters.values()) {
// Convert and any Converter class names.
convertConverterClassNamesToClasses(converter, classLoader);
}
}
/**
* INTERNAL:
* Cascade discover and persist new objects during commit.
*/
@Override
public void cascadeDiscoverAndPersistUnregisteredNewObjects(Object object, Map newObjects, Map unregisteredExistingObjects, Map visitedObjects, UnitOfWorkImpl uow, Set cascadeErrors) {
//aggregate objects are not registered but their mappings should be.
Object cloneAttribute = null;
cloneAttribute = getAttributeValueFromObject(object);
if ((cloneAttribute == null) || (!getIndirectionPolicy().objectIsInstantiated(cloneAttribute))) {
return;
}
ObjectBuilder builder = null;
ContainerPolicy cp = getContainerPolicy();
Object cloneObjectCollection = null;
cloneObjectCollection = getRealCollectionAttributeValueFromObject(object, uow);
Object cloneIter = cp.iteratorFor(cloneObjectCollection);
while (cp.hasNext(cloneIter)) {
Object wrappedObject = cp.nextEntry(cloneIter, uow);
Object nextObject = cp.unwrapIteratorResult(wrappedObject);
if (nextObject != null) {
builder = getReferenceDescriptor(nextObject.getClass(), uow).getObjectBuilder();
builder.cascadeDiscoverAndPersistUnregisteredNewObjects(nextObject, newObjects, unregisteredExistingObjects, visitedObjects, uow, cascadeErrors);
cp.cascadeDiscoverAndPersistUnregisteredNewObjects(wrappedObject, newObjects, unregisteredExistingObjects, visitedObjects, uow, cascadeErrors);
}
}
}
/**
* INTERNAL:
* Cascade registerNew for Create through mappings that require the cascade
*/
@Override
public void cascadeRegisterNewIfRequired(Object object, UnitOfWorkImpl uow, Map visitedObjects) {
// Aggregate objects are not registered but their mappings should be.
Object attributeValue = getAttributeValueFromObject(object);
if ((attributeValue == null)
// Also check if the source is new, then must always cascade.
|| (!this.indirectionPolicy.objectIsInstantiated(attributeValue) && !uow.isCloneNewObject(object))) {
return;
}
ObjectBuilder builder = null;
ContainerPolicy cp = this.containerPolicy;
Object cloneObjectCollection = null;
cloneObjectCollection = getRealCollectionAttributeValueFromObject(object, uow);
Object cloneIter = cp.iteratorFor(cloneObjectCollection);
while (cp.hasNext(cloneIter)) {
Object wrappedObject = cp.nextEntry(cloneIter, uow);
Object nextObject = cp.unwrapIteratorResult(wrappedObject);
if (nextObject != null && (! visitedObjects.containsKey(nextObject))){
visitedObjects.put(nextObject, nextObject);
builder = getReferenceDescriptor(nextObject.getClass(), uow).getObjectBuilder();
builder.cascadeRegisterNewForCreate(nextObject, uow, visitedObjects);
cp.cascadeRegisterNewIfRequired(wrappedObject, uow, visitedObjects);
}
}
}
/**
* INTERNAL:
* Cascade registerNew for Create through mappings that require the cascade
*/
@Override
public void cascadePerformRemoveIfRequired(Object object, UnitOfWorkImpl uow, Map visitedObjects){
//aggregate objects are not registered but their mappings should be.
Object cloneAttribute = getAttributeValueFromObject(object);
if ((cloneAttribute == null)) {
return;
}
// PERF: If not instantiated, then avoid instantiating, delete-all will handle deletion.
if (usesIndirection() && (!mustDeleteReferenceObjectsOneByOne())) {
if (!this.indirectionPolicy.objectIsInstantiated(cloneAttribute)) {
return;
}
}
ObjectBuilder builder = null;
ContainerPolicy cp = getContainerPolicy();
Object cloneObjectCollection = null;
cloneObjectCollection = getRealCollectionAttributeValueFromObject(object, uow);
Object cloneIter = cp.iteratorFor(cloneObjectCollection);
while (cp.hasNext(cloneIter)) {
Object wrappedObject = cp.nextEntry(cloneIter, uow);
Object nextObject = cp.unwrapIteratorResult(wrappedObject);
if (nextObject != null && ( ! visitedObjects.containsKey(nextObject) ) ){
visitedObjects.put(nextObject, nextObject);
if (this.isCascadeOnDeleteSetOnDatabase) {
uow.getCascadeDeleteObjects().add(nextObject);
}
builder = getReferenceDescriptor(nextObject.getClass(), uow).getObjectBuilder();
builder.cascadePerformRemove(nextObject, uow, visitedObjects);
cp.cascadePerformRemoveIfRequired(wrappedObject, uow, visitedObjects);
}
}
}
/**
* INTERNAL:
* Cascade perform removal of orphaned private owned objects from the UnitOfWorkChangeSet
*/
@Override
public void cascadePerformRemovePrivateOwnedObjectFromChangeSetIfRequired(Object object, UnitOfWorkImpl uow, Map visitedObjects) {
// if the object is not instantiated, do not instantiate or cascade
Object attributeValue = getAttributeValueFromObject(object);
if (attributeValue != null && getIndirectionPolicy().objectIsInstantiated(attributeValue)) {
Object cloneObjectCollection = getRealCollectionAttributeValueFromObject(object, uow);
ContainerPolicy cp = getContainerPolicy();
for (Object cloneIter = cp.iteratorFor(cloneObjectCollection); cp.hasNext(cloneIter);) {
Object referencedObject = cp.next(cloneIter, uow);
if (referencedObject != null && !visitedObjects.containsKey(referencedObject)) {
visitedObjects.put(referencedObject, referencedObject);
ObjectBuilder builder = getReferenceDescriptor(referencedObject.getClass(), uow).getObjectBuilder();
builder.cascadePerformRemovePrivateOwnedObjectFromChangeSet(referencedObject, uow, visitedObjects);
}
}
}
}
/**
* INTERNAL:
* The mapping clones itself to create deep copy.
*/
@Override
public Object clone() {
AggregateCollectionMapping mappingObject = (AggregateCollectionMapping)super.clone();
mappingObject.setTargetForeignKeyToSourceKeys(new HashMap(getTargetForeignKeyToSourceKeys()));
mappingObject.setSourceKeyFields(org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(getSourceKeyFields()));
mappingObject.setTargetForeignKeyFields(org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(getTargetForeignKeyFields()));
mappingObject.aggregateToSourceFields = new HashMap(this.aggregateToSourceFields);
mappingObject.nestedAggregateToSourceFields = new HashMap(this.nestedAggregateToSourceFields);
if(updateListOrderFieldQuery != null) {
mappingObject.updateListOrderFieldQuery = this.updateListOrderFieldQuery;
}
if(bulkUpdateListOrderFieldQuery != null) {
mappingObject.bulkUpdateListOrderFieldQuery = this.bulkUpdateListOrderFieldQuery;
}
if(pkUpdateListOrderFieldQuery != null) {
mappingObject.pkUpdateListOrderFieldQuery = this.pkUpdateListOrderFieldQuery;
}
return mappingObject;
}
/**
* INTERNAL:
* This method is used to create a change record from comparing two aggregate collections
* @return ChangeRecord
*/
@Override
public ChangeRecord compareForChange(Object clone, Object backUp, ObjectChangeSet owner, AbstractSession session) {
Object cloneAttribute = null;
Object backUpAttribute = null;
cloneAttribute = getAttributeValueFromObject(clone);
if ((cloneAttribute != null) && (!getIndirectionPolicy().objectIsInstantiated(cloneAttribute))) {
//If the clone's valueholder was not triggered then no changes were made.
return null;
}
if (!owner.isNew()) {
backUpAttribute = getAttributeValueFromObject(backUp);
if ((backUpAttribute == null) && (cloneAttribute == null)) {
return null;
}
ContainerPolicy cp = getContainerPolicy();
Object backupCollection = null;
Object cloneCollection = null;
cloneCollection = getRealCollectionAttributeValueFromObject(clone, session);
backupCollection = getRealCollectionAttributeValueFromObject(backUp, session);
if (cp.sizeFor(backupCollection) != cp.sizeFor(cloneCollection)) {
return convertToChangeRecord(cloneCollection, backupCollection, owner, session);
}
boolean change = false;
if (cp.isMapPolicy()){
change = compareMapCollectionForChange((Map)cloneCollection, (Map)backupCollection, session);
} else {
Object cloneIterator = cp.iteratorFor(cloneCollection);
Object backUpIterator = cp.iteratorFor(backupCollection);
// For bug 2863721 must use a different UnitOfWorkChangeSet as here just
// seeing if changes are needed. If changes are needed then a
// real changeSet will be created later.
UnitOfWorkChangeSet uowComparisonChangeSet = new UnitOfWorkChangeSet(session);
while (cp.hasNext(cloneIterator)) {
Object cloneObject = cp.next(cloneIterator, session);
// For CR#2285 assume that if null is added the collection has changed.
if (cloneObject == null) {
change = true;
break;
}
Object backUpObject = null;
if (cp.hasNext(backUpIterator)) {
backUpObject = cp.next(backUpIterator, session);
} else {
change = true;
break;
}
if (cloneObject.getClass().equals(backUpObject.getClass())) {
ObjectBuilder builder = getReferenceDescriptor(cloneObject.getClass(), session).getObjectBuilder();
ObjectChangeSet initialChanges = builder.createObjectChangeSet(cloneObject, uowComparisonChangeSet, owner.isNew(), session);
//compare for changes will return null if no change is detected and I need to remove the changeSet
ObjectChangeSet changes = builder.compareForChange(cloneObject, backUpObject, uowComparisonChangeSet, session);
if (changes != null) {
change = true;
break;
}
} else {
change = true;
break;
}
}
if (cp.hasNext(backUpIterator)){
change = true;
}
}
if ((change == true)) {
return convertToChangeRecord(cloneCollection, backupCollection, owner, session);
} else {
return null;
}
}
return convertToChangeRecord(getRealCollectionAttributeValueFromObject(clone, session), containerPolicy.containerInstance(), owner, session);
}
/**
* INTERNAL:
* Determine if an AggregateCollection that is contained as a map has changed by comparing the values in the
* clone to the values in the backup.
*/
protected boolean compareMapCollectionForChange(Map cloneObjectCollection, Map backUpCollection, AbstractSession session){
HashMap originalKeyValues = new HashMap(10);
Object backUpIter = containerPolicy.iteratorFor(backUpCollection);
while (containerPolicy.hasNext(backUpIter)) {// Make a lookup of the objects
Map.Entry entry = (Map.Entry)containerPolicy.nextEntry(backUpIter, session);
originalKeyValues.put(entry.getKey(), entry.getValue());
}
UnitOfWorkChangeSet uowComparisonChangeSet = new UnitOfWorkChangeSet(session);
Object cloneIter = containerPolicy.iteratorFor(cloneObjectCollection);
while (containerPolicy.hasNext(cloneIter)) {//Compare them with the objects from the clone
Map.Entry wrappedFirstObject = (Map.Entry)containerPolicy.nextEntry(cloneIter, session);
Object firstValue = wrappedFirstObject.getValue();
Object firstKey = wrappedFirstObject.getKey();
Object backupValue = originalKeyValues.get(firstKey);
if (!originalKeyValues.containsKey(firstKey)) {
return true;
} else if ((backupValue == null) && (firstValue != null)) {//the object was not in the backup
return true;
} else {
ObjectBuilder builder = getReferenceDescriptor(firstValue.getClass(), session).getObjectBuilder();
ObjectChangeSet changes = builder.compareForChange(firstValue, backupValue, uowComparisonChangeSet, session);
if (changes != null) {
return true;
} else {
originalKeyValues.remove(firstKey);
}
}
}
return !originalKeyValues.isEmpty();
}
/**
* INTERNAL:
* Old and new lists are compared and only the changes are written to the database.
* Called only if listOrderField != null
*/
@Override
protected void compareListsAndWrite(List previousList, List currentList, WriteObjectQuery query) throws DatabaseException, OptimisticLockException {
if(this.isListOrderFieldUpdatable) {
compareListsAndWrite_UpdatableListOrderField(previousList, currentList, query);
} else {
compareListsAndWrite_NonUpdatableListOrderField(previousList, currentList, query);
}
}
/**
* INTERNAL:
* Old and new lists are compared and only the changes are written to the database.
* Called only if listOrderField != null
*/
protected void compareListsAndWrite_NonUpdatableListOrderField(List previousList, List currentList, WriteObjectQuery query) throws DatabaseException, OptimisticLockException {
boolean shouldRepairOrder = false;
if(currentList instanceof IndirectList) {
shouldRepairOrder = ((IndirectList)currentList).isListOrderBrokenInDb();
}
HashMap previousAndCurrentByKey = new HashMap<>();
int pkSize = getReferenceDescriptor().getPrimaryKeyFields().size();
// First index the current objects by their primary key.
for (int i=0; i < currentList.size(); i++) {
Object currentObject = currentList.get(i);
try {
CacheId primaryKey = (CacheId)getReferenceDescriptor().getObjectBuilder().extractPrimaryKeyFromObject(currentObject, query.getSession());
primaryKey.add(i);
Object[] previousAndCurrent = new Object[]{null, currentObject};
previousAndCurrentByKey.put(primaryKey, previousAndCurrent);
} catch (NullPointerException e) {
// For CR#2646 quietly discard nulls added to a collection mapping.
// This try-catch is essentially a null check on currentObject, for
// ideally the customer should check for these themselves.
if (currentObject != null) {
throw e;
}
}
}
if (shouldRepairOrder) {
DeleteAllQuery deleteAllQuery = (DeleteAllQuery)this.deleteAllQuery;
if (this.isCascadeOnDeleteSetOnDatabase) {
deleteAllQuery = (DeleteAllQuery)deleteAllQuery.clone();
deleteAllQuery.setIsInMemoryOnly(false);
}
deleteAllQuery.executeDeleteAll(query.getSession().getSessionForClass(getReferenceClass()), query.getTranslationRow(), new Vector(previousList));
} else {
// Next index the previous objects (read from db or from backup in uow)
for(int i=0; i < previousList.size(); i++) {
Object previousObject = previousList.get(i);
CacheId primaryKey = (CacheId)getReferenceDescriptor().getObjectBuilder().extractPrimaryKeyFromObject(previousObject, query.getSession());
primaryKey.add(i);
Object[] previousAndCurrent = previousAndCurrentByKey.get(primaryKey);
if (previousAndCurrent == null) {
// there's no current object - that means that previous object should be deleted
DatabaseRecord extraData = new DatabaseRecord(1);
extraData.put(this.listOrderField, i);
objectRemovedDuringUpdate(query, previousObject, extraData);
} else {
previousAndCurrent[0] = previousObject;
}
}
}
Iterator> it = previousAndCurrentByKey.entrySet().iterator();
while(it.hasNext()) {
Map.Entry entry = it.next();
Object key = entry.getKey();
Object[] previousAndCurrent = entry.getValue();
// previousObject may be null, meaning currentObject has been added to the list
Object previousObject = previousAndCurrent[0];
// currentObject is not null
Object currentObject = previousAndCurrent[1];
if(previousObject == null) {
// there's no previous object - that means that current object should be added.
// index of currentObject in currentList
int iCurrent = (Integer)((CacheId)key).getPrimaryKey()[pkSize];
DatabaseRecord extraData = new DatabaseRecord(1);
extraData.put(this.listOrderField, iCurrent);
objectAddedDuringUpdate(query, currentObject, null, extraData);
} else {
if(!this.isEntireObjectPK) {
objectUnchangedDuringUpdate(query, currentObject, previousObject);
}
}
}
if(shouldRepairOrder) {
((IndirectList)currentList).setIsListOrderBrokenInDb(false);
}
}
/**
* INTERNAL:
* Old and new lists are compared and only the changes are written to the database.
* Called only if listOrderField != null
*/
protected void compareListsAndWrite_UpdatableListOrderField(List previousList, List currentList, WriteObjectQuery query) throws DatabaseException, OptimisticLockException {
boolean shouldRepairOrder = false;
if(currentList instanceof IndirectList) {
shouldRepairOrder = ((IndirectList)currentList).isListOrderBrokenInDb();
}
// Object[] = {previousObject, currentObject, previousIndex, currentIndex}
HashMap previousAndCurrentByKey = new HashMap<>();
// a SortedMap, current index mapped by previous index, both indexes must exist and be not equal.
TreeMap currentIndexByPreviousIndex = new TreeMap<>();
// First index the current objects by their primary key.
for(int i=0; i < currentList.size(); i++) {
Object currentObject = currentList.get(i);
try {
Object primaryKey = getReferenceDescriptor().getObjectBuilder().extractPrimaryKeyFromObject(currentObject, query.getSession());
Object[] previousAndCurrent = new Object[]{null, currentObject, null, i};
previousAndCurrentByKey.put(primaryKey, previousAndCurrent);
} catch (NullPointerException e) {
// For CR#2646 quietly discard nulls added to a collection mapping.
// This try-catch is essentially a null check on currentObject, for
// ideally the customer should check for these themselves.
if (currentObject != null) {
throw e;
}
}
}
// Next index the previous objects (read from db or from backup in uow), also remove the objects to be removed.
for(int i=0; i < previousList.size(); i++) {
Object previousObject = previousList.get(i);
Object primaryKey = getReferenceDescriptor().getObjectBuilder().extractPrimaryKeyFromObject(previousObject, query.getSession());
Object[] previousAndCurrent = previousAndCurrentByKey.get(primaryKey);
if(previousAndCurrent == null) {
// there's no current object - that means that previous object should be deleted
objectRemovedDuringUpdate(query, previousObject, null);
} else {
previousAndCurrent[0] = previousObject;
previousAndCurrent[2] = i;
int iCurrent = (Integer)previousAndCurrent[3];
if(i != iCurrent || shouldRepairOrder) {
currentIndexByPreviousIndex.put(i, iCurrent);
}
}
}
// some order indexes should be changed
if(!currentIndexByPreviousIndex.isEmpty()) {
boolean shouldUpdateOrderUsingPk = shouldRepairOrder;
if(!shouldUpdateOrderUsingPk) {
// search for cycles in order changes, such as, for instance:
// previous index 1, 2
// current index 2, 1
// or
// previous index 1, 3, 5
// current index 3, 5, 1
// those objects order index can't be updated using their previous order index value - should use pk in where clause instead.
// For now, if a cycle is found let's update all order indexes using pk.
// Ideally that should be refined in the future so that only indexes participating in cycles updated using pks - others still through bulk update.
boolean isCycleFound = false;
int iCurrentMax = -1;
Iterator itCurrentIndexes = currentIndexByPreviousIndex.values().iterator();
while(itCurrentIndexes.hasNext() && !isCycleFound) {
int iCurrent = itCurrentIndexes.next();
if(iCurrent > iCurrentMax) {
iCurrentMax = iCurrent;
} else {
isCycleFound = true;
}
}
shouldUpdateOrderUsingPk = isCycleFound;
}
if(shouldUpdateOrderUsingPk) {
Iterator> it = previousAndCurrentByKey.entrySet().iterator();
while(it.hasNext()) {
Map.Entry entry = it.next();
Object key = entry.getKey();
Object[] previousAndCurrent = entry.getValue();
// previousObject may be null, meaning currentObject has been added to the list
Object previousObject = previousAndCurrent[0];
if(previousObject != null) {
Object currentObject = previousAndCurrent[1];
if(!this.isEntireObjectPK) {
objectUnchangedDuringUpdate(query, currentObject, previousObject);
}
int iPrevious = (Integer)previousAndCurrent[2];
int iCurrent = (Integer)previousAndCurrent[3];
if(iPrevious != iCurrent || shouldRepairOrder) {
objectChangedListOrderDuringUpdate(query, key, iCurrent);
}
}
}
} else {
// update the objects - but not their order values
if(!this.isEntireObjectPK) {
Iterator> iterator = previousAndCurrentByKey.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry entry = iterator.next();
Object[] previousAndCurrent = entry.getValue();
// previousObject may be null, meaning currentObject has been added to the list
Object previousObject = previousAndCurrent[0];
if( previousObject != null) {
Object currentObject = previousAndCurrent[1];
objectUnchangedDuringUpdate(query, currentObject, previousObject);
}
}
}
// a bulk update query will be executed for each bunch of adjacent previous indexes from which current indexes could be obtained with a shift, for instance:
// previous index 1, 2, 3
// current index 5, 6, 7
// the sql will look like:
// UPDATE ... SET ListOrderField = ListOrderField + 4 WHERE 1 <= ListOrderField AND ListOrderField <= 3 AND FK = ...
int iMin = -1;
int iMax = -1;
int iShift = 0;
// each index corresponds to a bunch of objects to be shifted
ArrayList iMinList = new ArrayList();
ArrayList iMaxList = new ArrayList();
ArrayList iShiftList = new ArrayList();
Iterator> itEntries = currentIndexByPreviousIndex.entrySet().iterator();
while(itEntries.hasNext()) {
Map.Entry entry = itEntries.next();
int iPrevious = entry.getKey();
int iCurrent = entry.getValue();
if(iMin >= 0) {
// the shift should be the same for all indexes participating in bulk update
int iPreviousExpected = iMax + 1;
if(iPrevious == iPreviousExpected && iCurrent == iPreviousExpected + iShift) {
iMax++;
} else {
iMinList.add(iMin);
iMaxList.add(iMax);
iShiftList.add(iShift);
iMin = -1;
}
}
if(iMin == -1) {
// start defining a new bulk update - define iShift, iFirst, iLast
iMin = iPrevious;
iMax = iPrevious;
iShift = iCurrent - iPrevious;
}
}
if(iMin >= 0) {
iMinList.add(iMin);
iMaxList.add(iMax);
iShiftList.add(iShift);
}
// Order is important - shouldn't override indexes in one bunch while shifting another one.
// Look for the left-most and right-most bunches and update them first.
while(!iMinList.isEmpty()) {
int iMinLeft = previousList.size() + 1;
int iMinRight = -1;
int indexShiftLeft = -1;
int indexShiftRight = -1;
for(int i=0; i < iMinList.size(); i++) {
iMin = iMinList.get(i);
iShift = iShiftList.get(i);
if(iShift < 0) {
if(iMin < iMinLeft) {
iMinLeft = iMin;
indexShiftLeft = i;
}
} else {
// iShift > 0
if(iMin > iMinRight) {
iMinRight = iMin;
indexShiftRight = i;
}
}
}
if(indexShiftLeft >= 0) {
objectChangedListOrderDuringUpdate(query, iMinList.get(indexShiftLeft), iMaxList.get(indexShiftLeft), iShiftList.get(indexShiftLeft));
}
if(indexShiftRight >= 0) {
objectChangedListOrderDuringUpdate(query, iMinList.get(indexShiftRight), iMaxList.get(indexShiftRight), iShiftList.get(indexShiftRight));
}
if(indexShiftLeft >= 0) {
iMinList.remove(indexShiftLeft);
iMaxList.remove(indexShiftLeft);
iShiftList.remove(indexShiftLeft);
}
if(indexShiftRight >= 0) {
iMinList.remove(indexShiftRight);
iMaxList.remove(indexShiftRight);
iShiftList.remove(indexShiftRight);
}
}
}
}
// Add the new objects
Iterator> iterator = previousAndCurrentByKey.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry entry = iterator.next();
Object[] previousAndCurrent = entry.getValue();
// previousObject may be null, meaning currentObject has been added to the list
Object previousObject = previousAndCurrent[0];
if (previousObject == null) {
// there's no previous object - that means that current object should be added.
// currentObject is not null
Object currentObject = previousAndCurrent[1];
// index of currentObject in currentList
int iCurrent = (Integer)previousAndCurrent[3];
DatabaseRecord extraData = new DatabaseRecord(1);
extraData.put(this.listOrderField, iCurrent);
objectAddedDuringUpdate(query, currentObject, null, extraData);
}
}
if (shouldRepairOrder) {
((IndirectList)currentList).setIsListOrderBrokenInDb(false);
}
}
protected int objectChangedListOrderDuringUpdate(WriteObjectQuery query, int iMin, int iMax, int iShift) {
DataModifyQuery updateQuery;
AbstractRecord translationRow = query.getTranslationRow().clone();
translationRow.put(min, iMin);
if(iMin == iMax) {
translationRow.put(this.listOrderField, iMin + iShift);
updateQuery = updateListOrderFieldQuery;
} else {
translationRow.put(max, iMax);
translationRow.put(shift, iShift);
updateQuery = bulkUpdateListOrderFieldQuery;
}
return (Integer)query.getSession().executeQuery(updateQuery, translationRow);
}
protected int objectChangedListOrderDuringUpdate(WriteObjectQuery query, Object key, int newOrderValue) {
AbstractRecord translationRow = query.getTranslationRow().clone();
translationRow.put(this.listOrderField, newOrderValue);
getReferenceDescriptor().getObjectBuilder().writeIntoRowFromPrimaryKeyValues(translationRow, key, query.getSession(), true);
return (Integer)query.getSession().executeQuery(this.pkUpdateListOrderFieldQuery, translationRow);
}
/**
* INTERNAL:
* Compare the attributes belonging to this mapping for the objects.
*/
@Override
public boolean compareObjects(Object firstObject, Object secondObject, AbstractSession session) {
Object firstCollection = getRealCollectionAttributeValueFromObject(firstObject, session);
Object secondCollection = getRealCollectionAttributeValueFromObject(secondObject, session);
if(this.listOrderField != null) {
return this.compareLists((List)firstCollection, (List)secondCollection, session);
}
ContainerPolicy containerPolicy = getContainerPolicy();
if (containerPolicy.sizeFor(firstCollection) != containerPolicy.sizeFor(secondCollection)) {
return false;
}
if (containerPolicy.sizeFor(firstCollection) == 0) {
return true;
}
if (isMapKeyMapping()) {
Object firstIter = containerPolicy.iteratorFor(firstCollection);
Object secondIter = containerPolicy.iteratorFor(secondCollection);
Map keyValues = new HashMap();
while (containerPolicy.hasNext(secondIter)) {
Map.Entry secondEntry = (Map.Entry)containerPolicy.nextEntry(secondIter, session);
Object primaryKey = getReferenceDescriptor().getObjectBuilder().extractPrimaryKeyFromObject(secondEntry.getValue(), session);
Object key = secondEntry.getKey();
keyValues.put(key, primaryKey);
}
while (containerPolicy.hasNext(firstIter)) {
Map.Entry firstEntry = (Map.Entry)containerPolicy.nextEntry(firstIter, session);
Object primaryKey = getReferenceDescriptor().getObjectBuilder().extractPrimaryKeyFromObject(firstEntry.getValue(), session);
Object key = firstEntry.getKey();
if (!primaryKey.equals(keyValues.get(key))) {
return false;
}
}
} else {
//iterator the first aggregate collection
for (Object iterFirst = containerPolicy.iteratorFor(firstCollection);
containerPolicy.hasNext(iterFirst);) {
//fetch the next object from the first iterator.
Object firstAggregateObject = containerPolicy.next(iterFirst, session);
//iterator the second aggregate collection
for (Object iterSecond = containerPolicy.iteratorFor(secondCollection); true;) {
//fetch the next object from the second iterator.
Object secondAggregateObject = containerPolicy.next(iterSecond, session);
//matched object found, break to outer FOR loop
if (getReferenceDescriptor().getObjectBuilder().compareObjects(firstAggregateObject, secondAggregateObject, session)) {
break;
}
if (!containerPolicy.hasNext(iterSecond)) {
return false;
}
}
}
}
return true;
}
/**
* INTERNAL:
* Compare the attributes belonging to this mapping for the objects.
*/
public boolean compareLists(List firstList, List secondList, AbstractSession session) {
if (firstList.size() != secondList.size()) {
return false;
}
int size = firstList.size();
for(int i=0; i < size; i++) {
Object firstObject = firstList.get(i);
Object secondObject = secondList.get(i);
if (!getReferenceDescriptor().getObjectBuilder().compareObjects(firstObject, secondObject, session)) {
return false;
}
}
return true;
}
/**
* INTERNAL:
* This method is used to convert the contents of an aggregateCollection into a
* changeRecord
* @return org.eclipse.persistence.internal.sessions.AggregateCollectionChangeRecord the changerecord representing this AggregateCollectionMapping
* @param owner org.eclipse.persistence.internal.sessions.ObjectChangeSet the ChangeSet that uses this record
* @param cloneCollection Object the collection to convert
* @param session org.eclipse.persistence.internal.sessions.AbstractSession
*/
protected ChangeRecord convertToChangeRecord(Object cloneCollection, Object backupCollection, ObjectChangeSet owner, AbstractSession session) {
ContainerPolicy cp = getContainerPolicy();
Object cloneIter = cp.iteratorFor(cloneCollection);
Vector collectionChanges = new Vector(2);
while (cp.hasNext(cloneIter)) {
Object entry = cp.nextEntry(cloneIter, session);
Object aggregateObject = cp.unwrapIteratorResult(entry);
// For CR#2258 quietly ignore nulls inserted into a collection.
if (aggregateObject != null) {
ObjectChangeSet changes = getReferenceDescriptor(aggregateObject.getClass(), session).getObjectBuilder().compareForChange(aggregateObject, null, (UnitOfWorkChangeSet)owner.getUOWChangeSet(), session);
changes.setNewKey(cp.keyFromIterator(cloneIter));
collectionChanges.addElement(changes);
}
}
//cr 3013 Removed if collection is empty return null block, which prevents recording clear() change
AggregateCollectionChangeRecord changeRecord = new AggregateCollectionChangeRecord(owner);
changeRecord.setAttribute(getAttributeName());
changeRecord.setMapping(this);
changeRecord.setChangedValues(collectionChanges);
changeRecord.setOriginalCollection(backupCollection);
getContainerPolicy().compareCollectionsForChange(backupCollection, cloneCollection, changeRecord, session, remoteReferenceDescriptor);
return changeRecord;
}
/**
* INTERNAL:
* Copies member's value
*/
@Override
protected Object copyElement(Object original, CopyGroup group) {
if (original == null) {
return null;
}
ClassDescriptor descriptor = getReferenceDescriptor(original.getClass(), group.getSession());
if (descriptor == null) {
return original;
}
return descriptor.getObjectBuilder().copyObject(original, group);
}
/**
* INTERNAL
* Called when a DatabaseMapping is used to map the key in a collection. Returns the key.
*/
@Override
public Object createMapComponentFromRow(AbstractRecord dbRow, ObjectBuildingQuery query, CacheKey parentCacheKey, AbstractSession session, boolean isTargetProtected){
return valueFromRow(dbRow, null, query, parentCacheKey, query.getExecutionSession(), isTargetProtected, null);
}
/**
* To delete all the entries matching the selection criteria from the table stored in the
* referenced descriptor
*/
protected void deleteAll(DeleteObjectQuery query, AbstractSession session) throws DatabaseException {
Object attribute = getAttributeValueFromObject(query.getObject());
if (usesIndirection()) {
if (!this.indirectionPolicy.objectIsInstantiated(attribute)) {
// An empty Vector indicates to DeleteAllQuery that no objects should be removed from cache
((DeleteAllQuery)this.deleteAllQuery).executeDeleteAll(session.getSessionForClass(this.referenceClass), query.getTranslationRow(), new Vector(0));
return;
}
}
Object referenceObjects = getRealCollectionAttributeValueFromObject(query.getObject(), session);
// PERF: Avoid delete if empty.
if (session.isUnitOfWork() && this.containerPolicy.isEmpty(referenceObjects)) {
return;
}
((DeleteAllQuery)this.deleteAllQuery).executeDeleteAll(session.getSessionForClass(this.referenceClass), query.getTranslationRow(), this.containerPolicy.vectorFor(referenceObjects, session));
}
/**
* INTERNAL:
* Execute a descriptor event for the specified event code.
*/
protected void executeEvent(int eventCode, ObjectLevelModifyQuery query) {
ClassDescriptor referenceDescriptor = getReferenceDescriptor(query.getObject().getClass(), query.getSession());
// PERF: Avoid events if no listeners.
if (referenceDescriptor.getEventManager().hasAnyEventListeners()) {
referenceDescriptor.getEventManager().executeEvent(new DescriptorEvent(eventCode, query));
}
}
/**
* INTERNAL:
* Extract the source primary key value from the target row.
* Used for batch reading, most following same order and fields as in the mapping.
*/
@Override
protected Object extractKeyFromTargetRow(AbstractRecord row, AbstractSession session) {
int size = this.targetForeignKeyFields.size();
Object[] key = new Object[size];
ConversionManager conversionManager = session.getDatasourcePlatform().getConversionManager();
for (int index = 0; index < size; index++) {
DatabaseField targetField = this.targetForeignKeyFields.get(index);
DatabaseField sourceField = this.sourceKeyFields.get(index);
Object value = row.get(targetField);
// Must ensure the classification gets a cache hit.
try {
value = conversionManager.convertObject(value, sourceField.getType());
} catch (ConversionException e) {
throw ConversionException.couldNotBeConverted(this, getDescriptor(), e);
}
key[index] = value;
}
return new CacheId(key);
}
/**
* INTERNAL:
* Extract the primary key value from the source row.
* Used for batch reading, most following same order and fields as in the mapping.
*/
@Override
protected Object extractBatchKeyFromRow(AbstractRecord row, AbstractSession session) {
int size = this.sourceKeyFields.size();
Object[] key = new Object[size];
ConversionManager conversionManager = session.getDatasourcePlatform().getConversionManager();
for (int index = 0; index < size; index++) {
DatabaseField field = this.sourceKeyFields.get(index);
Object value = row.get(field);
// Must ensure the classification gets a cache hit.
try {
value = conversionManager.convertObject(value, field.getType());
} catch (ConversionException exception) {
throw ConversionException.couldNotBeConverted(this, this.descriptor, exception);
}
key[index] = value;
}
return new CacheId(key);
}
/**
* INTERNAL:
* Return the selection criteria used to IN batch fetching.
*/
@Override
protected Expression buildBatchCriteria(ExpressionBuilder builder, ObjectLevelReadQuery query) {
int size = this.targetForeignKeyFields.size();
if (size > 1) {
// Support composite keys using nested IN.
List fields = new ArrayList<>(size);
for (DatabaseField targetForeignKeyField : this.targetForeignKeyFields) {
fields.add(builder.getField(targetForeignKeyField));
}
return query.getSession().getPlatform().buildBatchCriteriaForComplexId(builder, fields);
} else {
return query.getSession().getPlatform().buildBatchCriteria(builder, builder.getField(this.targetForeignKeyFields.get(0)));
}
}
/**
* INTERNAL:
* Allow the mapping the do any further batch preparation.
*/
@Override
protected void postPrepareNestedBatchQuery(ReadQuery batchQuery, ObjectLevelReadQuery query) {
super.postPrepareNestedBatchQuery(batchQuery, query);
ReadAllQuery aggregateBatchQuery = (ReadAllQuery)batchQuery;
for (DatabaseField relationField : getTargetForeignKeyFields()) {
aggregateBatchQuery.getAdditionalFields().add(relationField);
}
}
/**
* INTERNAL:
* return the aggregate Record with the primary keys from the source table and target table
*/
public AbstractRecord getAggregateRow(ObjectLevelModifyQuery query, Object object) {
Vector referenceObjectKeys = getReferenceObjectKeys(query);
AbstractRecord aggregateRow = new DatabaseRecord();
Vector keys = getTargetForeignKeyFields();
for (int keyIndex = 0; keyIndex < keys.size(); keyIndex++) {
aggregateRow.put(keys.elementAt(keyIndex), referenceObjectKeys.elementAt(keyIndex));
}
getReferenceDescriptor(object.getClass(), query.getSession()).getObjectBuilder().buildRow(aggregateRow, object, query.getSession(), WriteType.UNDEFINED);
return aggregateRow;
}
/**
* Delete all criteria is created with target foreign keys and source keys.
* This criteria is then used to delete target records from the table.
*/
protected Expression getDeleteAllCriteria(AbstractSession session) {
Expression expression;
Expression criteria = null;
Expression builder = new ExpressionBuilder();
for (Iterator keys = getTargetForeignKeyToSourceKeys().keySet().iterator(); keys.hasNext();) {
DatabaseField targetForeignKey = keys.next();
DatabaseField sourceKey = getTargetForeignKeyToSourceKeys().get(targetForeignKey);
expression = builder.getField(targetForeignKey).equal(builder.getParameter(sourceKey));
criteria = expression.and(criteria);
}
return criteria;
}
/**
* Overrides CollectionMappig because this mapping requires a DeleteAllQuery instead of a ModifyQuery.
*/
@Override
protected ModifyQuery getDeleteAllQuery() {
if (deleteAllQuery == null) {
deleteAllQuery = new DeleteAllQuery();//this is casted to a DeleteAllQuery
}
return deleteAllQuery;
}
/**
* INTERNAL:
* Return the referenceDescriptor. This is a descriptor which is associated with the reference class.
* NOTE: If you are looking for the descriptor for a specific aggregate object, use
* #getReferenceDescriptor(Object). This will ensure you get the right descriptor if the object's
* descriptor is part of an inheritance tree.
*/
@Override
public ClassDescriptor getReferenceDescriptor() {
if (referenceDescriptor == null) {
referenceDescriptor = remoteReferenceDescriptor;
}
return referenceDescriptor;
}
/**
* INTERNAL:
* for inheritance purpose
*/
public ClassDescriptor getReferenceDescriptor(Class theClass, AbstractSession session) {
if (this.referenceDescriptor.getJavaClass() == theClass) {
return this.referenceDescriptor;
} else {
ClassDescriptor subDescriptor;
// Since aggregate collection mappings clone their descriptors, for inheritance the correct child clone must be found.
subDescriptor = this.referenceDescriptor.getInheritancePolicy().getSubclassDescriptor(theClass);
if (subDescriptor == null) {
throw DescriptorException.noSubClassMatch(theClass, this);
} else {
return subDescriptor;
}
}
}
/**
* INTERNAL:
* get reference object keys
*/
public Vector getReferenceObjectKeys(ObjectLevelModifyQuery query) throws DatabaseException, OptimisticLockException {
Vector referenceObjectKeys = new Vector(getSourceKeyFields().size());
//For CR#2587-S.M. For nested aggregate collections the source keys can easily be read from the original query.
AbstractRecord translationRow = query.getTranslationRow();
for (Enumeration sourcekeys = getSourceKeyFields().elements();
sourcekeys.hasMoreElements();) {
DatabaseField sourceKey = sourcekeys.nextElement();
// CR#2587. Try first to get the source key from the original query. If that fails try to get it from the object.
Object referenceKey = null;
if ((translationRow != null) && (translationRow.containsKey(sourceKey))) {
referenceKey = translationRow.get(sourceKey);
} else {
referenceKey = getDescriptor().getObjectBuilder().extractValueFromObjectForField(query.getObject(), sourceKey, query.getSession());
}
referenceObjectKeys.addElement(referenceKey);
}
return referenceObjectKeys;
}
/**
* PUBLIC:
* Return the source key field names associated with the mapping.
* These are in-order with the targetForeignKeyFieldNames.
*/
public Vector getSourceKeyFieldNames() {
Vector fieldNames = new Vector(getSourceKeyFields().size());
for (Enumeration fieldsEnum = getSourceKeyFields().elements();
fieldsEnum.hasMoreElements();) {
fieldNames.addElement(fieldsEnum.nextElement().getQualifiedName());
}
return fieldNames;
}
/**
* INTERNAL:
* Return the source key names associated with the mapping
*/
public Vector getSourceKeyFields() {
return sourceKeyFields;
}
/**
* PUBLIC:
* Return the target foregin key field names associated with the mapping.
* These are in-order with the sourceKeyFieldNames.
*/
public Vector getTargetForeignKeyFieldNames() {
Vector fieldNames = new Vector(getTargetForeignKeyFields().size());
for (Enumeration fieldsEnum = getTargetForeignKeyFields().elements();
fieldsEnum.hasMoreElements();) {
fieldNames.addElement(fieldsEnum.nextElement().getQualifiedName());
}
return fieldNames;
}
/**
* INTERNAL:
* Return the target foregin key fields associated with the mapping
*/
public Vector getTargetForeignKeyFields() {
return targetForeignKeyFields;
}
/**
* INTERNAL:
*/
public Map getTargetForeignKeyToSourceKeys() {
return targetForeignKeyToSourceKeys;
}
/**
* INTERNAL:
* For aggregate collection mapping the reference descriptor is cloned. The cloned descriptor is then
* assigned primary keys and table names before initialize. Once cloned descriptor is initialized
* it is assigned as reference descriptor in the aggregate mapping. This is very specific
* behavior for aggregate mappings. The original descriptor is used only for creating clones and
* after that mapping never uses it.
* Some initialization is done in postInitialize to ensure the target descriptor's references are initialized.
*/
@Override
public void initialize(AbstractSession session) throws DescriptorException {
if (session.hasBroker()) {
if (getReferenceClass() == null) {
throw DescriptorException.referenceClassNotSpecified(this);
}
// substitute session that owns the mapping for the session that owns reference descriptor.
session = session.getBroker().getSessionForClass(getReferenceClass());
}
super.initialize(session);
if (getDescriptor() != null) { // descriptor will only be null in special case where the mapping has not been added to a descriptor prior to initialization.
getDescriptor().addMappingsPostCalculateChanges(this); // always equivalent to Private Owned
}
if (!getReferenceDescriptor().isAggregateCollectionDescriptor()) {
session.getIntegrityChecker().handleError(DescriptorException.referenceDescriptorIsNotAggregateCollection(getReferenceClass().getName(), this));
}
if (shouldInitializeSelectionCriteria()) {
if (isSourceKeySpecified()) {
initializeTargetForeignKeyToSourceKeys(session);
} else {
initializeTargetForeignKeyToSourceKeysWithDefaults(session);
}
initializeSelectionCriteria(session);
getContainerPolicy().addAdditionalFieldsToQuery(getSelectionQuery(), getAdditionalFieldsBaseExpression(getSelectionQuery()));
}
// Aggregate 1:m never maintains cache as target objects are aggregates.
getSelectionQuery().setShouldMaintainCache(false);
// Add foreign key fields to select, as field values may be required for relationships.
for (DatabaseField relationField : getTargetForeignKeyFields()) {
((ReadAllQuery)getSelectionQuery()).getAdditionalFields().add(relationField);
}
initializeDeleteAllQuery(session);
if (this.listOrderField != null) {
initializeUpdateListOrderQuery(session, "");
initializeUpdateListOrderQuery(session, bulk);
initializeUpdateListOrderQuery(session, pk);
}
if (getDescriptor() != null) {
// Check if any foreign keys reference a secondary table.
if (getDescriptor().getTables().size() > 1) {
DatabaseTable firstTable = getDescriptor().getTables().get(0);
for (DatabaseField field : getSourceKeyFields()) {
if (!field.getTable().equals(firstTable)) {
getDescriptor().setHasMultipleTableConstraintDependecy(true);
}
}
}
}
// Aggregate collections do not have a cache key when build, so cannot be cached if they have references to isolated classes.
if ((this.referenceDescriptor != null) && this.referenceDescriptor.hasNoncacheableMappings()) {
this.isCacheable = false;
}
}
/**
* Initialize and set the descriptor for the referenced class in this mapping.
*/
@Override
protected void initializeReferenceDescriptor(AbstractSession session) throws DescriptorException {
super.initializeReferenceDescriptor(session);
HashMap fieldTranslation = null;
HashMap tableTranslation = null;
ClassDescriptor referenceDescriptor = getReferenceDescriptor();
ClassDescriptor clonedDescriptor = (ClassDescriptor) referenceDescriptor.clone();
if (clonedDescriptor.isAggregateDescriptor()) {
clonedDescriptor.descriptorIsAggregateCollection();
}
int nAggregateTables = 0;
if (referenceDescriptor.getTables() != null) {
nAggregateTables = referenceDescriptor.getTables().size();
}
if (! aggregateToSourceFields.isEmpty()) {
DatabaseTable aggregateDefaultTable = null;
if (nAggregateTables != 0) {
aggregateDefaultTable = referenceDescriptor.getTables().get(0);
} else {
aggregateDefaultTable = new DatabaseTable();
}
tableTranslation = new HashMap<>();
fieldTranslation = new HashMap<>();
for (String aggregateFieldName : aggregateToSourceFields.keySet()) {
DatabaseField aggregateField = new DatabaseField(aggregateFieldName);
// 564260 - Force field names to upper case is set.
if (session.getPlatform() != null && session.getPlatform().shouldForceFieldNamesToUpperCase()) {
aggregateField.useUpperCaseForComparisons(true);
}
// 322233 - continue using a string for the Aggregate field name
// because the table may or may not have been set. DatabaseFields without a table
// will match any DatabaseField with a table if the name is the same, breaking
// legacy support for AggregateCollection inheritance models
if (! aggregateField.hasTableName()) {
aggregateField.setTable(aggregateDefaultTable);
}
DatabaseField sourceField = aggregateToSourceFields.get(aggregateFieldName);
if (! sourceField.hasTableName()) {
if (defaultSourceTable == null) {
// TODO: throw exception: source field doesn't have table
} else {
sourceField.setTable(defaultSourceTable);
}
}
DatabaseTable sourceTable = sourceField.getTable();
DatabaseTable savedSourceTable = tableTranslation.get(aggregateField.getTable());
if (savedSourceTable == null) {
tableTranslation.put(aggregateField.getTable(), sourceTable);
} else {
if (! sourceTable.equals(savedSourceTable)) {
// TODO: throw exception: aggregate table mapped to two source tables
}
}
sourceField.setIsTranslated(true);
fieldTranslation.put(aggregateField, sourceField);
}
// Translate the table and fields now.
translateTablesAndFields(clonedDescriptor, fieldTranslation, tableTranslation);
} else {
if (nAggregateTables == 0) {
if (defaultSourceTable == null) {
// TODO: throw exception
} else {
clonedDescriptor.addTable(defaultSourceTable);
}
}
}
updateNestedAggregateMappings(clonedDescriptor, session);
if (clonedDescriptor.isChildDescriptor()) {
ClassDescriptor parentDescriptor = session.getDescriptor(clonedDescriptor.getInheritancePolicy().getParentClass());
initializeParentInheritance(parentDescriptor, clonedDescriptor, session, fieldTranslation, tableTranslation);
}
if (clonedDescriptor.isAggregateDescriptor()) {
clonedDescriptor.descriptorIsAggregateCollection();
}
setReferenceDescriptor(clonedDescriptor);
clonedDescriptor.preInitialize(session);
getContainerPolicy().initialize(session, clonedDescriptor.getDefaultTable());
if (clonedDescriptor.getPrimaryKeyFields().isEmpty()) {
this.isEntireObjectPK = true;
clonedDescriptor.getAdditionalAggregateCollectionKeyFields().addAll(this.getTargetForeignKeyFields());
if(this.listOrderField != null && !this.isListOrderFieldUpdatable) {
clonedDescriptor.getAdditionalAggregateCollectionKeyFields().add(this.listOrderField);
}
}
List identityFields = getContainerPolicy().getIdentityFieldsForMapKey();
if (identityFields != null){
clonedDescriptor.getAdditionalAggregateCollectionKeyFields().addAll(identityFields);
}
clonedDescriptor.initialize(session);
// Apply any converters to their cloned mappings (after initialization)
for (String attributeName : converters.keySet()) {
ClassDescriptor desc = clonedDescriptor;
DatabaseMapping mapping = null;
for (TokensIterator i = new TokensIterator(attributeName, true); i.hasNext();) {
mapping = desc != null ? desc.getMappingForAttributeName(i.next()) : null;
if (mapping == null) {
break;
}
desc = mapping.getReferenceDescriptor();
}
if (mapping != null) {
converters.get(attributeName).initialize(mapping, session);
}
}
if (clonedDescriptor.hasInheritance() && clonedDescriptor.getInheritancePolicy().hasChildren()) {
//clone child descriptors
initializeChildInheritance(clonedDescriptor, session, fieldTranslation, tableTranslation);
}
}
protected void initializeUpdateListOrderQuery(AbstractSession session, String queryType) {
DataModifyQuery query = new DataModifyQuery();
if(queryType == pk) {
this.pkUpdateListOrderFieldQuery = query;
} else if(queryType == bulk) {
this.bulkUpdateListOrderFieldQuery = query;
} else {
this.updateListOrderFieldQuery = query;
}
query.setSessionName(session.getName());
// Build where clause expression.
Expression whereClause = null;
Expression builder = new ExpressionBuilder();
AbstractRecord modifyRow = new DatabaseRecord();
if(queryType == pk) {
Iterator it = getReferenceDescriptor().getPrimaryKeyFields().iterator();
while(it.hasNext()) {
DatabaseField pkField = it.next();
DatabaseField sourceField = targetForeignKeyToSourceKeys.get(pkField);
DatabaseField parameterField = sourceField != null ? sourceField : pkField;
Expression expression = builder.getField(pkField).equal(builder.getParameter(parameterField));
whereClause = expression.and(whereClause);
}
modifyRow.add(this.listOrderField, null);
} else {
Iterator> it = targetForeignKeyToSourceKeys.entrySet().iterator();
while(it.hasNext()) {
Map.Entry entry = it.next();
Expression expression = builder.getField(entry.getKey()).equal(builder.getParameter(entry.getValue()));
whereClause = expression.and(whereClause);
}
Expression listOrderExpression;
if(queryType == bulk) {
listOrderExpression = builder.getField(this.listOrderField).between(builder.getParameter(min), builder.getParameter(max));
modifyRow.add(this.listOrderField, ExpressionMath.add(builder.getField(this.listOrderField), builder.getParameter(shift)));
} else {
listOrderExpression = builder.getField(this.listOrderField).equal(builder.getParameter(min));
modifyRow.add(this.listOrderField, null);
}
whereClause = listOrderExpression.and(whereClause);
}
SQLUpdateStatement statement = new SQLUpdateStatement();
statement.setTable(getReferenceDescriptor().getDefaultTable());
statement.setWhereClause(whereClause);
statement.setModifyRow(modifyRow);
query.setSQLStatement(statement);
}
/**
* INTERNAL:
* Clone and prepare the JoinedAttributeManager nested JoinedAttributeManager.
* This is used for nested joining as the JoinedAttributeManager passed to the joined build object.
*/
@Override
public ObjectLevelReadQuery prepareNestedJoins(JoinedAttributeManager joinManager, ObjectBuildingQuery baseQuery, AbstractSession session) {
ObjectLevelReadQuery nestedQuery = super.prepareNestedJoins(joinManager, baseQuery, session);
nestedQuery.setShouldMaintainCache(false);
return nestedQuery;
}
/**
* INTERNAL:
* Called in case fieldTranslation != null
* Sets new primary keys, tables, appends fieldTranslation to fieldMap so that all fields in mappings, inheritance etc. translated to the new ones.
*/
protected static void translateTablesAndFields(ClassDescriptor descriptor, HashMap fieldTranslation, HashMap tableTranslation) {
int nTables = 0;
if(descriptor.getTables() != null) {
nTables = descriptor.getTables().size();
}
DatabaseTable defaultAggregateTable = null;
if(nTables == 0) {
defaultAggregateTable = new DatabaseTable();
DatabaseTable defaultSourceTable = tableTranslation.get(defaultAggregateTable);
if(defaultSourceTable == null) {
//TODO: throw exception
}
descriptor.addTable(defaultSourceTable);
} else {
defaultAggregateTable = descriptor.getTables().get(0);
Vector newTables = NonSynchronizedVector.newInstance(nTables);
for(int i=0; i < nTables; i++) {
DatabaseTable table = tableTranslation.get(descriptor.getTables().get(i));
if(table == null) {
//TODO: throw exception
}
if(!newTables.contains(table)) {
newTables.add(table);
}
}
descriptor.setTables(newTables);
}
int nPrimaryKeyFields = 0;
if(descriptor.getPrimaryKeyFields() != null) {
nPrimaryKeyFields = descriptor.getPrimaryKeyFields().size();
}
if(nPrimaryKeyFields > 0) {
ArrayList newPrimaryKeyFields = new ArrayList(nPrimaryKeyFields);
for(int i=0; i < nPrimaryKeyFields; i++) {
DatabaseField pkField = descriptor.getPrimaryKeyFields().get(i);
if(!pkField.hasTableName() && nTables > 0) {
pkField = new DatabaseField(pkField.getName(), defaultAggregateTable);
}
DatabaseField field = fieldTranslation.get(pkField);
if(field == null) {
//TODO: throw exception: pk not translated
}
newPrimaryKeyFields.add(field);
}
descriptor.setPrimaryKeyFields(newPrimaryKeyFields);
}
// put fieldTranslation into fieldsMap so that all the fields in the mappings, inheritance policy etc
// are translated to the new ones.
descriptor.getObjectBuilder().getFieldsMap().putAll(fieldTranslation);
}
/**
* INTERNAL:
* Called in case nestedAggregateToSourceFieldNames != null
* Updates AggregateObjectMappings and AggregateCollectionMappings of the
* reference descriptor.
*/
protected void updateNestedAggregateMappings(ClassDescriptor descriptor, AbstractSession session) {
if (! nestedAggregateToSourceFields.isEmpty()) {
Iterator>> it = nestedAggregateToSourceFields.entrySet().iterator();
while (it.hasNext()) {
Map.Entry> entry = it.next();
String attribute = entry.getKey();
String nestedAttribute = null;
int indexOfDot = attribute.indexOf('.');
// attribute "homes.sellingPonts" is divided into attribute "homes" and nestedAttribute "sellingPoints"
if (indexOfDot >= 0) {
nestedAttribute = attribute.substring(indexOfDot + 1, attribute.length());
attribute = attribute.substring(0, indexOfDot);
}
DatabaseMapping mapping = descriptor.getMappingForAttributeName(attribute);
if (mapping == null) {
//TODO: may have been already processed by the parent, may be processed later by a child.
//Should add method verifyNestedAggregateToSourceFieldNames that would go through
//all the children and detect the wrong attribute.
continue;
}
if (mapping.isAggregateCollectionMapping()) {
AggregateCollectionMapping nestedAggregateCollectionMapping = (AggregateCollectionMapping)mapping;
if (nestedAttribute == null) {
nestedAggregateCollectionMapping.addFieldTranslations(entry.getValue());
} else {
nestedAggregateCollectionMapping.addNestedFieldNameTranslations(nestedAttribute, entry.getValue());
}
} else if (mapping.isAggregateObjectMapping()) {
// We have a nested aggregate object mapping (which in turn may have more nested aggregate object mappings).
// However, at this point we have all the field name translations in the nested list. Since we have the clone
// of the first nested aggregate object from the aggregate collection mapping, we will add all the field name
// translations to it since we do not need to look up nested mappings field names. The way nested aggregate
// object mappings handle field name translations will work if we set all the translations on the root of the
// nested objects. This in turn allows sharing nested aggregate objects and allowing different name translations
// for each different chain. Given this aggregate chain "record.location.venue.history" where record is an
// aggregate collection mapping, metadata processing from JPA will (and a direct user may opt to) add all the
// attribute overrides from location, venue and history under separate attribute names, that is,
// - addNestedFieldNameTranslation("location", ..., ...);
// - addNestedFieldNameTranslation("location.venue", ..., ...);
// - addNestedFieldNameTranslation("location.venue.history", ..., ...);
//
// This will add all the field name translations to the 'location' aggregate object mapping since we extract
// the attribute name as the string up to the first dot.
// Simply adding all the nestedFieldNameTranslations to 'location' would work as well.
AggregateObjectMapping nestedAggregateObjectMapping = (AggregateObjectMapping) mapping;
Map entries = entry.getValue();
for (String aggregateFieldName : entries.keySet()) {
DatabaseField sourceField = entries.get(aggregateFieldName);
nestedAggregateObjectMapping.addFieldTranslation(sourceField, aggregateFieldName);
}
} else {
// TODO: throw exception: mapping corresponding to attribute is not a mapping that accepts field name translations.
}
}
}
}
/**
* INTERNAL:
* For aggregate mapping the reference descriptor is cloned. Also the involved inheritance descriptor, its children
* and parents all need to be cloned. The cloned descriptors are then assigned primary keys and table names before
* initialize. Once cloned descriptor is initialized it is assigned as reference descriptor in the aggregate mapping.
* This is very specific behavior for aggregate mappings. The original descriptor is used only for creating clones
* and after that mapping never uses it.
* Some initialization is done in postInitialize to ensure the target descriptor's references are initialized.
*/
public void initializeChildInheritance(ClassDescriptor parentDescriptor, AbstractSession session,
HashMap fieldTranslation, HashMap tableTranslation) throws DescriptorException {
//recursive call to further children descriptors
if (parentDescriptor.getInheritancePolicy().hasChildren()) {
//setFields(clonedChildDescriptor.getFields());
List childDescriptors = parentDescriptor.getInheritancePolicy().getChildDescriptors();
List cloneChildDescriptors = new ArrayList(childDescriptors.size());
for (ClassDescriptor childDescriptor : childDescriptors) {
ClassDescriptor clonedChildDescriptor = (ClassDescriptor)childDescriptor.clone();
if (fieldTranslation != null) {
translateTablesAndFields(clonedChildDescriptor, fieldTranslation, tableTranslation);
}
updateNestedAggregateMappings(clonedChildDescriptor, session);
if (clonedChildDescriptor.isAggregateDescriptor()) {
clonedChildDescriptor.descriptorIsAggregateCollection();
}
if (!clonedChildDescriptor.isAggregateCollectionDescriptor()) {
session.getIntegrityChecker().handleError(DescriptorException.referenceDescriptorIsNotAggregate(clonedChildDescriptor.getJavaClass().getName(), this));
}
clonedChildDescriptor.getInheritancePolicy().setParentDescriptor(parentDescriptor);
clonedChildDescriptor.preInitialize(session);
clonedChildDescriptor.initialize(session);
cloneChildDescriptors.add(clonedChildDescriptor);
initializeChildInheritance(clonedChildDescriptor, session, fieldTranslation, tableTranslation);
}
parentDescriptor.getInheritancePolicy().setChildDescriptors(cloneChildDescriptors);
}
}
/**
* INTERNAL:
* Initialize delete all query. This query is used to delete the collection of objects from the
* target table.
*/
protected void initializeDeleteAllQuery(AbstractSession session) {
DeleteAllQuery query = (DeleteAllQuery)getDeleteAllQuery();
query.setReferenceClass(getReferenceClass());
query.setDescriptor(getReferenceDescriptor());
query.setShouldMaintainCache(false);
query.setIsInMemoryOnly(isCascadeOnDeleteSetOnDatabase());
if (query.getPartitioningPolicy() == null) {
query.setPartitioningPolicy(getPartitioningPolicy());
}
if (!hasCustomDeleteAllQuery()) {
if (getSelectionCriteria() == null) {
query.setSelectionCriteria(getDeleteAllCriteria(session));
} else {
query.setSelectionCriteria(getSelectionCriteria());
}
}
}
/**
* INTERNAL:
* For aggregate mapping the reference descriptor is cloned. Also the involved inheritance descriptor, its children
* and parents all need to be cloned. The cloned descriptors are then assigned primary keys and table names before
* initialize. Once cloned descriptor is initialized it is assigned as reference descriptor in the aggregate mapping.
* This is very specific behavior for aggregate mappings. The original descriptor is used only for creating clones
* and after that mapping never uses it.
* Some initialization is done in postInitialize to ensure the target descriptor's references are initialized.
*/
public void initializeParentInheritance(ClassDescriptor parentDescriptor, ClassDescriptor childDescriptor, AbstractSession session,
HashMap fieldTranslation, HashMap tableTranslation) throws DescriptorException {
ClassDescriptor clonedParentDescriptor = (ClassDescriptor)parentDescriptor.clone();
if(clonedParentDescriptor.isAggregateDescriptor()) {
clonedParentDescriptor.descriptorIsAggregateCollection();
}
if (!clonedParentDescriptor.isAggregateCollectionDescriptor()) {
session.getIntegrityChecker().handleError(DescriptorException.referenceDescriptorIsNotAggregateCollection(parentDescriptor.getJavaClass().getName(), this));
}
if (fieldTranslation != null) {
translateTablesAndFields(clonedParentDescriptor, fieldTranslation, tableTranslation);
}
updateNestedAggregateMappings(clonedParentDescriptor, session);
//recursive call to the further parent descriptors
if (clonedParentDescriptor.getInheritancePolicy().isChildDescriptor()) {
ClassDescriptor parentToParentDescriptor = session.getDescriptor(clonedParentDescriptor.getJavaClass());
initializeParentInheritance(parentToParentDescriptor, parentDescriptor, session, fieldTranslation, tableTranslation);
}
Vector children = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(1);
children.addElement(childDescriptor);
clonedParentDescriptor.getInheritancePolicy().setChildDescriptors(children);
clonedParentDescriptor.preInitialize(session);
clonedParentDescriptor.initialize(session);
}
/**
* INTERNAL:
* Selection criteria is created with target foreign keys and source keys.
* This criteria is then used to read records from the target table.
*/
protected void initializeSelectionCriteria(AbstractSession session) {
Expression expression;
Expression criteria;
Expression builder = new ExpressionBuilder();
for (Iterator keys = getTargetForeignKeyToSourceKeys().keySet().iterator(); keys.hasNext();) {
DatabaseField targetForeignKey = keys.next();
DatabaseField sourceKey = getTargetForeignKeyToSourceKeys().get(targetForeignKey);
expression = builder.getField(targetForeignKey).equal(builder.getParameter(sourceKey));
criteria = expression.and(getSelectionCriteria());
setSelectionCriteria(criteria);
}
}
/**
* INTERNAL:
* The foreign keys and the primary key names are converted to DatabaseFields and stored.
*/
protected void initializeTargetForeignKeyToSourceKeys(AbstractSession session) throws DescriptorException {
if (getTargetForeignKeyFields().isEmpty()) {
throw DescriptorException.noTargetForeignKeysSpecified(this);
}
for (int index = 0; index < getTargetForeignKeyFields().size(); index++) {
DatabaseField foreignKeyfield = getTargetForeignKeyFields().get(index);
foreignKeyfield = getReferenceDescriptor().buildField(foreignKeyfield);
getTargetForeignKeyFields().set(index, foreignKeyfield);
}
for (int index = 0; index < getSourceKeyFields().size(); index++) {
DatabaseField sourceKeyfield = getSourceKeyFields().get(index);
sourceKeyfield = getDescriptor().buildField(sourceKeyfield);
if (usesIndirection()) {
sourceKeyfield.setKeepInRow(true);
}
getSourceKeyFields().set(index, sourceKeyfield);
}
if (getTargetForeignKeyFields().size() != getSourceKeyFields().size()) {
throw DescriptorException.targetForeignKeysSizeMismatch(this);
}
Iterator targetForeignKeysEnum = getTargetForeignKeyFields().iterator();
Iterator sourceKeysEnum = getSourceKeyFields().iterator();
while (targetForeignKeysEnum.hasNext()) {
getTargetForeignKeyToSourceKeys().put(targetForeignKeysEnum.next(), sourceKeysEnum.next());
}
}
/**
* INTERNAL:
* The foreign keys and the primary key names are converted to DatabaseFields and stored. The source keys
* are not specified by the user so primary keys are extracted from the reference descriptor.
*/
protected void initializeTargetForeignKeyToSourceKeysWithDefaults(AbstractSession session) throws DescriptorException {
if (getTargetForeignKeyFields().isEmpty()) {
throw DescriptorException.noTargetForeignKeysSpecified(this);
}
List sourceKeys = getDescriptor().getPrimaryKeyFields();
if (usesIndirection()) {
for (DatabaseField field : sourceKeys) {
field.setKeepInRow(true);
}
}
setSourceKeyFields(org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(sourceKeys));
for (int index = 0; index < getTargetForeignKeyFields().size(); index++) {
DatabaseField foreignKeyfield = getTargetForeignKeyFields().get(index);
foreignKeyfield = getReferenceDescriptor().buildField(foreignKeyfield);
getTargetForeignKeyFields().set(index, foreignKeyfield);
}
if (getTargetForeignKeyFields().size() != sourceKeys.size()) {
throw DescriptorException.targetForeignKeysSizeMismatch(this);
}
for (int index = 0; index < getTargetForeignKeyFields().size(); index++) {
getTargetForeignKeyToSourceKeys().put(getTargetForeignKeyFields().get(index), sourceKeys.get(index));
}
}
/**
* INTERNAL:
* Iterate on the specified element.
*/
@Override
public void iterateOnElement(DescriptorIterator iterator, Object element) {
// CR#... Aggregate collections must iterate as aggregates, not regular mappings.
// For some reason the element can be null, this makes absolutely no sense, but we have a test case for it...
if (element != null) {
iterator.iterateForAggregateMapping(element, this, getReferenceDescriptor(element.getClass(), iterator.getSession()));
}
}
/**
* INTERNAL:
*/
@Override
public boolean isAggregateCollectionMapping() {
return true;
}
/**
* INTERNAL:
*/
@Override
public boolean isElementCollectionMapping() {
return true;
}
/**
* INTERNAL:
* Return if this mapping support joining.
*/
@Override
public boolean isJoiningSupported() {
return true;
}
/**
* INTERNAL:
*/
@Override
public boolean isOwned(){
return true;
}
/**
* Checks if source key is specified or not.
*/
protected boolean isSourceKeySpecified() {
return !(getSourceKeyFields().isEmpty());
}
/**
* Force instantiation of the load group.
*/
@Override
public void load(final Object object, AttributeItem item, final AbstractSession session, final boolean fromFetchGroup) {
instantiateAttribute(object, session);
if (item.getGroup() != null && (!fromFetchGroup || session.isUnitOfWork())) {
//if UOW make sure the nested attributes are loaded as the clones will not be instantiated
Object value = getRealAttributeValueFromObject(object, session);
ContainerPolicy cp = this.containerPolicy;
for (Object iterator = cp.iteratorFor(value); cp.hasNext(iterator);) {
Object wrappedObject = cp.nextEntry(iterator, session);
Object nestedObject = cp.unwrapIteratorResult(wrappedObject);
getReferenceDescriptor(nestedObject.getClass(), session).getObjectBuilder().load(nestedObject, item.getGroup(nestedObject.getClass()), session, fromFetchGroup);
}
}
}
/**
* Force instantiation of all indirections.
*/
@Override
public void loadAll(Object object, AbstractSession session, IdentityHashSet loaded) {
instantiateAttribute(object, session);
Object value = getRealAttributeValueFromObject(object, session);
ContainerPolicy cp = this.containerPolicy;
for (Object iterator = cp.iteratorFor(value); cp.hasNext(iterator);) {
Object wrappedObject = cp.nextEntry(iterator, session);
Object nestedObject = cp.unwrapIteratorResult(wrappedObject);
getReferenceDescriptor(nestedObject.getClass(), session).getObjectBuilder().loadAll(nestedObject, session, loaded);
}
}
/**
* INTERNAL:
* Merge changes from the source to the target object.
* Because this is a collection mapping, values are added to or removed from the
* collection based on the changeset
*/
@Override
public void mergeChangesIntoObject(Object target, ChangeRecord changeRecord, Object source, MergeManager mergeManager, AbstractSession targetSession) {
if (this.descriptor.getCachePolicy().isProtectedIsolation() && !this.isCacheable && !targetSession.isProtectedSession()) {
setAttributeValueInObject(target, this.indirectionPolicy.buildIndirectObject(new ValueHolder<>(null)));
return;
}
//Check to see if the target has an instantiated collection
if (!isAttributeValueInstantiatedOrChanged(target)) {
//Then do nothing.
return;
}
ContainerPolicy containerPolicy = getContainerPolicy();
AbstractSession session = mergeManager.getSession();
Object valueOfTarget = null;
//At this point the source's indirection must be instantiated or the changeSet would never have
// been created
Object sourceAggregate = null;
//On a distributed cache if our changes are for the same version as the target object
//then load the changes from database.
// CR 4143
// CR 4155 Always replace the collection with the query results as we will not be able to
// find the originals for merging and indirection information may be lost.
if (mergeManager.shouldMergeChangesIntoDistributedCache()) {
ClassDescriptor descriptor = getDescriptor();
AbstractRecord parentRow = descriptor.getObjectBuilder().extractPrimaryKeyRowFromObject(target, session);
Object result = getIndirectionPolicy().valueFromQuery(getSelectionQuery(), parentRow, session);//fix for indirection
setAttributeValueInObject(target, result);
return;
}
// iterate over the changes and merge the collections
List aggregateObjects = ((AggregateCollectionChangeRecord)changeRecord).getChangedValues();
int size = aggregateObjects.size();
valueOfTarget = containerPolicy.containerInstance(size);
// Next iterate over the changes and add them to the container
ObjectChangeSet objectChanges = null;
for (int index = 0; index < size; ++index) {
objectChanges = aggregateObjects.get(index);
Class localClassType = objectChanges.getClassType(session);
sourceAggregate = objectChanges.getUnitOfWorkClone();
// cr 4155 Load the target from the UnitOfWork. This will be the original
// aggregate object that has the original indirection in it.
Object targetAggregate = ((UnitOfWorkImpl)mergeManager.getSession()).getCloneToOriginals().get(sourceAggregate);
if (targetAggregate == null) {
targetAggregate = getReferenceDescriptor(localClassType, session).getObjectBuilder().buildNewInstance();
}
getReferenceDescriptor(localClassType, session).getObjectBuilder().mergeChangesIntoObject(targetAggregate, objectChanges, sourceAggregate, mergeManager, targetSession);
containerPolicy.addInto(objectChanges.getNewKey(), targetAggregate, valueOfTarget, session);
}
setRealAttributeValueInObject(target, valueOfTarget);
}
/**
* INTERNAL:
* Merge changes from the source to the target object.
*/
@Override
public void mergeIntoObject(Object target, boolean isTargetUnInitialized, Object source, MergeManager mergeManager, AbstractSession targetSession) {
if (this.descriptor.getCachePolicy().isProtectedIsolation() && !this.isCacheable && !targetSession.isProtectedSession()) {
setAttributeValueInObject(target, this.indirectionPolicy.buildIndirectObject(new ValueHolder<>(null)));
return;
}
if (isTargetUnInitialized) {
// This will happen if the target object was removed from the cache before the commit was attempted
if (mergeManager.shouldMergeWorkingCopyIntoOriginal() && (!isAttributeValueInstantiatedOrChanged(source))) {
setAttributeValueInObject(target, getIndirectionPolicy().getOriginalIndirectionObject(getAttributeValueFromObject(source), targetSession));
return;
}
}
if (!shouldMergeCascadeReference(mergeManager)) {
// This is only going to happen on mergeClone, and we should not attempt to merge the reference
return;
}
if (mergeManager.shouldRefreshRemoteObject() && shouldMergeCascadeParts(mergeManager) && usesIndirection()) {
mergeRemoteValueHolder(target, source, mergeManager);
return;
}
if (mergeManager.isForRefresh()) {
if (!isAttributeValueInstantiatedOrChanged(target)) {
// This will occur when the clone's value has not been instantiated yet and we do not need
// the refresh that attribute
return;
}
} else if (!isAttributeValueInstantiatedOrChanged(source)) {
// I am merging from a clone into an original. No need to do merge if the attribute was never
// modified
return;
}
ContainerPolicy containerPolicy = getContainerPolicy();
Object valueOfSource = getRealCollectionAttributeValueFromObject(source, mergeManager.getSession());
Object valueOfTarget = containerPolicy.containerInstance(containerPolicy.sizeFor(valueOfSource));
for (Object sourceValuesIterator = containerPolicy.iteratorFor(valueOfSource);
containerPolicy.hasNext(sourceValuesIterator);) {
Object wrappedSourceValue = containerPolicy.nextEntry(sourceValuesIterator, mergeManager.getSession());
Object sourceValue = containerPolicy.unwrapIteratorResult(wrappedSourceValue);
// For some odd reason support for having null in the collection was added. This does not make sense...
Object originalValue = null;
if (sourceValue != null) {
//CR#2896 - TW
originalValue = getReferenceDescriptor(sourceValue.getClass(), mergeManager.getSession()).getObjectBuilder().buildNewInstance();
getReferenceDescriptor(sourceValue.getClass(), mergeManager.getSession()).getObjectBuilder().mergeIntoObject(originalValue, true, sourceValue, mergeManager, targetSession);
containerPolicy.addInto(containerPolicy.keyFromIterator(sourceValuesIterator), originalValue, valueOfTarget, mergeManager.getSession());
}
}
// Must re-set variable to allow for set method to re-morph changes if the collection is not being stored directly.
setRealAttributeValueInObject(target, valueOfTarget);
}
/**
* INTERNAL:
* An object was added to the collection during an update, insert it if private.
*/
@Override
protected void objectAddedDuringUpdate(ObjectLevelModifyQuery query, Object objectAdded, ObjectChangeSet changeSet, Map extraData) throws DatabaseException, OptimisticLockException {
// Insert must not be done for uow or cascaded queries and we must cascade to cascade policy.
InsertObjectQuery insertQuery = getAndPrepareModifyQueryForInsert(query, objectAdded);
ContainerPolicy.copyMapDataToRow(extraData, insertQuery.getModifyRow());
if(this.listOrderField != null && extraData != null) {
insertQuery.getModifyRow().put(this.listOrderField, extraData.get(this.listOrderField));
}
query.getSession().executeQuery(insertQuery, insertQuery.getTranslationRow());
}
/**
* INTERNAL:
* An object was removed to the collection during an update, delete it if private.
*/
@Override
protected void objectRemovedDuringUpdate(ObjectLevelModifyQuery query, Object objectDeleted, Map extraData) throws DatabaseException, OptimisticLockException {
// Delete must not be done for uow or cascaded queries and we must cascade to cascade policy.
DeleteObjectQuery deleteQuery = new DeleteObjectQuery();
deleteQuery.setIsExecutionClone(true);
prepareModifyQueryForDelete(query, deleteQuery, objectDeleted, extraData);
ContainerPolicy.copyMapDataToRow(extraData, deleteQuery.getTranslationRow());
query.getSession().executeQuery(deleteQuery, deleteQuery.getTranslationRow());
if (containerPolicy.shouldIncludeKeyInDeleteEvent()){
query.getSession().deleteObject(containerPolicy.keyFromEntry(objectDeleted));
}
}
/**
* INTERNAL:
* An object is still in the collection, update it as it may have changed.
*/
@Override
protected void objectUnchangedDuringUpdate(ObjectLevelModifyQuery query, Object object, Map backupCloneKeyedCache, Object cachedKey) throws DatabaseException, OptimisticLockException {
// Always write for updates, either private or in uow if calling this method.
UpdateObjectQuery updateQuery = new UpdateObjectQuery();
updateQuery.setIsExecutionClone(true);
Object backupclone = backupCloneKeyedCache.get(cachedKey);
updateQuery.setBackupClone(backupclone);
prepareModifyQueryForUpdate(query, updateQuery, object);
query.getSession().executeQuery(updateQuery, updateQuery.getTranslationRow());
}
protected void objectUnchangedDuringUpdate(ObjectLevelModifyQuery query, Object object, Object backupClone) throws DatabaseException, OptimisticLockException {
// Always write for updates, either private or in uow if calling this method.
UpdateObjectQuery updateQuery = new UpdateObjectQuery();
updateQuery.setIsExecutionClone(true);
updateQuery.setBackupClone(backupClone);
prepareModifyQueryForUpdate(query, updateQuery, object);
query.getSession().executeQuery(updateQuery, updateQuery.getTranslationRow());
}
/**
* INTERNAL:
* For aggregate collection mapping the reference descriptor is cloned. The cloned descriptor is then
* assigned primary keys and table names before initialize. Once the cloned descriptor is initialized
* it is assigned as reference descriptor in the aggregate mapping. This is a very specific
* behavior for aggregate mappings. The original descriptor is used only for creating clones and
* after that the aggregate mapping never uses it.
* Some initialization is done in postInitialize to ensure the target descriptor's references are initialized.
*/
@Override
public void postInitialize(AbstractSession session) throws DescriptorException {
super.postInitialize(session);
if (getReferenceDescriptor() != null) {
// Changed as part of fix for bug#4410581 aggregate mapping can not be set to use change tracking if owning descriptor does not use it.
// Basically the policies should be the same, but we also allow deferred with attribute for CMP2 (courser grained).
if (getDescriptor().getObjectChangePolicy().getClass().equals(DeferredChangeDetectionPolicy.class)) {
getReferenceDescriptor().setObjectChangePolicy(new DeferredChangeDetectionPolicy());
} else if (getDescriptor().getObjectChangePolicy().getClass().equals(ObjectChangeTrackingPolicy.class)
&& getReferenceDescriptor().getObjectChangePolicy().getClass().equals(AttributeChangeTrackingPolicy.class)) {
getReferenceDescriptor().setObjectChangePolicy(new ObjectChangeTrackingPolicy());
}
getReferenceDescriptor().postInitialize(session);
}
// Need to set the types on the foreign key fields, as not mapped in the object.
for (int index = 0; index < getSourceKeyFields().size(); index++) {
DatabaseField foreignKey = getSourceKeyFields().get(index);
DatabaseField targetKey = getTargetForeignKeyFields().get(index);
if (targetKey.getType() == null) {
targetKey.setType(getDescriptor().getObjectBuilder().getFieldClassification(foreignKey));
}
}
}
/**
* INTERNAL:
* Insert privately owned parts
*/
@Override
public void postInsert(WriteObjectQuery query) throws DatabaseException, OptimisticLockException {
if (isReadOnly()) {
return;
}
Object objects = getRealCollectionAttributeValueFromObject(query.getObject(), query.getSession());
int index = 0;
// insert each object one by one
ContainerPolicy cp = getContainerPolicy();
for (Object iter = cp.iteratorFor(objects); cp.hasNext(iter);) {
Object wrappedObject = cp.nextEntry(iter, query.getSession());
Object object = cp.unwrapIteratorResult(wrappedObject);
InsertObjectQuery insertQuery = getAndPrepareModifyQueryForInsert(query, object);
ContainerPolicy.copyMapDataToRow(cp.getKeyMappingDataForWriteQuery(wrappedObject, query.getSession()), insertQuery.getModifyRow());
if(this.listOrderField != null) {
insertQuery.getModifyRow().add(this.listOrderField, index++);
}
query.getSession().executeQuery(insertQuery, insertQuery.getTranslationRow());
cp.propogatePostInsert(query, wrappedObject);
}
}
/**
* INTERNAL:
* Update the privately owned parts
*/
@Override
public void postUpdate(WriteObjectQuery writeQuery) throws DatabaseException, OptimisticLockException {
if (this.isReadOnly) {
return;
}
// If objects are not instantiated that means they are not changed.
if (!isAttributeValueInstantiatedOrChanged(writeQuery.getObject())) {
return;
}
// OLD COMMIT - TODO This should not be used.
compareObjectsAndWrite(writeQuery);
}
/**
* INTERNAL:
* Delete privately owned parts
*/
@Override
public void preDelete(DeleteObjectQuery query) throws DatabaseException, OptimisticLockException {
if (isReadOnly()) {
return;
}
AbstractSession session = query.getSession();
// If privately owned parts have their privately own parts, delete those one by one
// else delete everything in one shot.
int index = 0;
if (mustDeleteReferenceObjectsOneByOne()) {
Object objects = getRealCollectionAttributeValueFromObject(query.getObject(), query.getSession());
ContainerPolicy cp = getContainerPolicy();
if (this.isCascadeOnDeleteSetOnDatabase && session.isUnitOfWork()) {
for (Object iterator = cp.iteratorFor(objects); cp.hasNext(iterator);) {
Object wrappedObject = cp.nextEntry(iterator, session);
Object object = cp.unwrapIteratorResult(wrappedObject);
((UnitOfWorkImpl)session).getCascadeDeleteObjects().add(object);
}
}
for (Object iter = cp.iteratorFor(objects); cp.hasNext(iter);) {
Object wrappedObject = cp.nextEntry(iter, session);
DeleteObjectQuery deleteQuery = new DeleteObjectQuery();
deleteQuery.setIsExecutionClone(true);
Map extraData = null;
if (this.listOrderField != null) {
extraData = new DatabaseRecord(1);
extraData.put(this.listOrderField, index++);
}
prepareModifyQueryForDelete(query, deleteQuery, wrappedObject, extraData);
session.executeQuery(deleteQuery, deleteQuery.getTranslationRow());
cp.propogatePreDelete(query, wrappedObject);
}
if (!session.isUnitOfWork()) {
// This deletes any objects on the database, as the collection in memory may has been changed.
// This is not required for unit of work, as the update would have already deleted these objects,
// and the backup copy will include the same objects causing double deletes.
verifyDeleteForUpdate(query);
}
} else {
deleteAll(query, session);
}
}
/**
* INTERNAL:
* The message is passed to its reference class descriptor.
*/
@Override
public void preInsert(WriteObjectQuery query) throws DatabaseException, OptimisticLockException {
if (isReadOnly()) {
return;
}
Object objects = getRealCollectionAttributeValueFromObject(query.getObject(), query.getSession());
int index = 0;
// pre-insert each object one by one
ContainerPolicy cp = getContainerPolicy();
for (Object iter = cp.iteratorFor(objects); cp.hasNext(iter);) {
Object wrappedObject = cp.nextEntry(iter, query.getSession());
Object object = cp.unwrapIteratorResult(wrappedObject);
InsertObjectQuery insertQuery = getAndPrepareModifyQueryForInsert(query, object);
ContainerPolicy.copyMapDataToRow(cp.getKeyMappingDataForWriteQuery(wrappedObject, query.getSession()), insertQuery.getModifyRow());
if(this.listOrderField != null) {
insertQuery.getModifyRow().add(this.listOrderField, index++);
}
// aggregates do not actually use a query to write to the database so the pre-write must be called here
executeEvent(DescriptorEventManager.PreWriteEvent, insertQuery);
executeEvent(DescriptorEventManager.PreInsertEvent, insertQuery);
getReferenceDescriptor(object.getClass(), query.getSession()).getQueryManager().preInsert(insertQuery);
cp.propogatePreInsert(query, wrappedObject);
}
}
/**
* INTERNAL:
* Returns a clone of InsertObjectQuery from the ClassDescriptor's DescriptorQueryManager or a new one
*/
protected InsertObjectQuery getInsertObjectQuery(AbstractSession session, ClassDescriptor desc) {
InsertObjectQuery insertQuery = desc.getQueryManager().getInsertQuery();
if (insertQuery == null) {
insertQuery = new InsertObjectQuery();
insertQuery.setDescriptor(desc);
insertQuery.checkPrepare(session, insertQuery.getTranslationRow());
} else {
// Ensure the query has been prepared.
insertQuery.checkPrepare(session, insertQuery.getTranslationRow());
insertQuery = (InsertObjectQuery)insertQuery.clone();
}
insertQuery.setIsExecutionClone(true);
return insertQuery;
}
/**
* INTERNAL:
* setup the modifyQuery for post insert/update and pre delete
*/
public InsertObjectQuery getAndPrepareModifyQueryForInsert(ObjectLevelModifyQuery originalQuery, Object object) {
AbstractSession session = originalQuery.getSession();
ClassDescriptor objReferenceDescriptor = getReferenceDescriptor(object.getClass(), session);
InsertObjectQuery insertQuery = getInsertObjectQuery(session, objReferenceDescriptor);
insertQuery.setObject(object);
insertQuery.setDescriptor(objReferenceDescriptor);
AbstractRecord targetForeignKeyRow = new DatabaseRecord();
Vector referenceObjectKeys = getReferenceObjectKeys(originalQuery);
for (int keyIndex = 0; keyIndex < getTargetForeignKeyFields().size(); keyIndex++) {
targetForeignKeyRow.put(getTargetForeignKeyFields().elementAt(keyIndex), referenceObjectKeys.elementAt(keyIndex));
}
insertQuery.setModifyRow(targetForeignKeyRow);
insertQuery.setTranslationRow(targetForeignKeyRow);
insertQuery.setSession(session);
insertQuery.setCascadePolicy(originalQuery.getCascadePolicy());
insertQuery.dontMaintainCache();
// For bug 2863721 must set a backup clone for compatibility with
// old event mechanism, even though for AggregateCollections there is no
// way to get a backup directly from a clone.
if (session.isUnitOfWork()) {
Object backupAttributeValue = getReferenceDescriptor(object.getClass(), session).getObjectBuilder().buildNewInstance();
insertQuery.setBackupClone(backupAttributeValue);
}
return insertQuery;
}
/**
* INTERNAL:
* setup the modifyQuery for pre delete
*/
public void prepareModifyQueryForDelete(ObjectLevelModifyQuery originalQuery, ObjectLevelModifyQuery modifyQuery, Object wrappedObject, Map extraData) {
Object object = getContainerPolicy().unwrapIteratorResult(wrappedObject);
AbstractRecord aggregateRow = getAggregateRow(originalQuery, object);
ContainerPolicy.copyMapDataToRow(containerPolicy.getKeyMappingDataForWriteQuery(wrappedObject, originalQuery.getSession()), aggregateRow);
if(this.listOrderField != null && extraData != null) {
aggregateRow.put(this.listOrderField, extraData.get(this.listOrderField));
}
modifyQuery.setObject(object);
modifyQuery.setDescriptor(getReferenceDescriptor(object.getClass(), originalQuery.getSession()));
modifyQuery.setPrimaryKey(getReferenceDescriptor().getObjectBuilder().extractPrimaryKeyFromRow(aggregateRow, originalQuery.getSession()));
modifyQuery.setModifyRow(aggregateRow);
modifyQuery.setTranslationRow(aggregateRow);
modifyQuery.setSession(originalQuery.getSession());
if (originalQuery.shouldCascadeOnlyDependentParts()) {
//This query is the result of being in a UnitOfWork therefor use the Aggregate Collection
//specific cascade policy to prevent cascading the delete now
modifyQuery.setCascadePolicy(DatabaseQuery.CascadeAggregateDelete);
} else {
modifyQuery.setCascadePolicy(originalQuery.getCascadePolicy());
}
modifyQuery.dontMaintainCache();
}
/**
* INTERNAL:
* setup the modifyQuery for update,
*/
public void prepareModifyQueryForUpdate(ObjectLevelModifyQuery originalQuery, ObjectLevelModifyQuery modifyQuery, Object object) {
AbstractRecord aggregateRow = getAggregateRow(originalQuery, object);
modifyQuery.setObject(object);
modifyQuery.setDescriptor(getReferenceDescriptor(object.getClass(), originalQuery.getSession()));
modifyQuery.setPrimaryKey(getReferenceDescriptor().getObjectBuilder().extractPrimaryKeyFromRow(aggregateRow, originalQuery.getSession()));
modifyQuery.setTranslationRow(aggregateRow);
modifyQuery.setSession(originalQuery.getSession());
modifyQuery.setCascadePolicy(originalQuery.getCascadePolicy());
modifyQuery.dontMaintainCache();
}
/**
* INTERNAL:
* Set the referenceDescriptor. This is a descriptor which is associated with
* the reference class.
*/
@Override
protected void setReferenceDescriptor(ClassDescriptor aDescriptor) {
this.referenceDescriptor = aDescriptor;
this.remoteReferenceDescriptor = this.referenceDescriptor;
}
/**
* PUBLIC:
* Set the source key field names associated with the mapping.
* These must be in-order with the targetForeignKeyFieldNames.
*/
public void setSourceKeyFieldNames(Vector fieldNames) {
Vector fields = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(fieldNames.size());
for (Enumeration fieldNamesEnum = fieldNames.elements(); fieldNamesEnum.hasMoreElements();) {
fields.addElement(new DatabaseField((String)fieldNamesEnum.nextElement()));
}
setSourceKeyFields(fields);
}
/**
* INTERNAL:
* set all the primary key names associated with this mapping
*/
public void setSourceKeyFields(Vector sourceKeyFields) {
this.sourceKeyFields = sourceKeyFields;
}
/**
* PUBLIC:
* Set the target foregin key field names associated with the mapping.
* These must be in-order with the sourceKeyFieldNames.
*/
public void setTargetForeignKeyFieldNames(Vector fieldNames) {
Vector fields = org.eclipse.persistence.internal.helper.NonSynchronizedVector.newInstance(fieldNames.size());
for (Enumeration fieldNamesEnum = fieldNames.elements(); fieldNamesEnum.hasMoreElements();) {
fields.addElement(new DatabaseField((String)fieldNamesEnum.nextElement()));
}
setTargetForeignKeyFields(fields);
}
/**
* INTERNAL:
* set the target foregin key fields associated with the mapping
*/
public void setTargetForeignKeyFields(Vector targetForeignKeyFields) {
this.targetForeignKeyFields = targetForeignKeyFields;
}
protected void setTargetForeignKeyToSourceKeys(Map targetForeignKeyToSourceKeys) {
this.targetForeignKeyToSourceKeys = targetForeignKeyToSourceKeys;
}
/**
* Returns true as any process leading to object modification should also affect its privately owned parts
* Usually used by write, insert, update and delete.
*/
@Override
protected boolean shouldObjectModifyCascadeToParts(ObjectLevelModifyQuery query) {
if (isReadOnly()) {
return false;
}
return true;
}
/**
* ADVANCED:
* This method is used to have an object add to a collection once the changeSet is applied
* The referenceKey parameter should only be used for direct Maps. PLEASE ENSURE that the changes
* have been made in the object model first.
*/
@Override
public void simpleAddToCollectionChangeRecord(Object referenceKey, Object changeSetToAdd, ObjectChangeSet changeSet, AbstractSession session) {
AggregateCollectionChangeRecord collectionChangeRecord = (AggregateCollectionChangeRecord)changeSet.getChangesForAttributeNamed(this.getAttributeName());
if (collectionChangeRecord == null) {
//if there is no change for this attribute then create a changeSet for it. no need to modify the resulting
// change record as it should be built from the clone which has the changes allready
Object cloneObject = changeSet.getUOWChangeSet().getUOWCloneForObjectChangeSet(changeSet);
Object cloneCollection = this.getRealAttributeValueFromObject(cloneObject, session);
collectionChangeRecord = (AggregateCollectionChangeRecord)convertToChangeRecord(cloneCollection, containerPolicy.containerInstance(), changeSet, session);
changeSet.addChange(collectionChangeRecord);
} else {
collectionChangeRecord.getChangedValues().add((ObjectChangeSet)changeSetToAdd);
}
}
/**
* ADVANCED:
* This method is used to have an object removed from a collection once the changeSet is applied
* The referenceKey parameter should only be used for direct Maps. PLEASE ENSURE that the changes
* have been made in the object model first.
*/
@Override
public void simpleRemoveFromCollectionChangeRecord(Object referenceKey, Object changeSetToRemove, ObjectChangeSet changeSet, AbstractSession session) {
AggregateCollectionChangeRecord collectionChangeRecord = (AggregateCollectionChangeRecord)changeSet.getChangesForAttributeNamed(this.getAttributeName());
if (collectionChangeRecord == null) {
//if there is no change for this attribute then create a changeSet for it. no need to modify the resulting
// change record as it should be built from the clone which has the changes allready
Object cloneObject = changeSet.getUOWChangeSet().getUOWCloneForObjectChangeSet(changeSet);
Object cloneCollection = this.getRealAttributeValueFromObject(cloneObject, session);
collectionChangeRecord = (AggregateCollectionChangeRecord)convertToChangeRecord(cloneCollection, containerPolicy.containerInstance(), changeSet, session);
changeSet.addChange(collectionChangeRecord);
} else {
collectionChangeRecord.getChangedValues().remove(changeSetToRemove);
}
}
/**
* INTERNAL:
* Checks if object is deleted from the database or not.
*/
@Override
public boolean verifyDelete(Object object, AbstractSession session) throws DatabaseException {
// Row is built for translation
if (isReadOnly()) {
return true;
}
AbstractRecord row = getDescriptor().getObjectBuilder().buildRowForTranslation(object, session);
Object value = session.executeQuery(getSelectionQuery(), row);
return getContainerPolicy().isEmpty(value);
}
/**
* Verifying deletes make sure that all the records privately owned by this mapping are
* actually removed. If such records are found than those are all read and removed one
* by one taking their privately owned parts into account.
*/
protected void verifyDeleteForUpdate(DeleteObjectQuery query) throws DatabaseException, OptimisticLockException {
Object objects = readPrivateOwnedForObject(query);
// Delete all these object one by one.
ContainerPolicy cp = getContainerPolicy();
for (Object iter = cp.iteratorFor(objects); cp.hasNext(iter);) {
query.getSession().deleteObject(cp.next(iter, query.getSession()));
}
}
/**
* INTERNAL:
* AggregateCollection contents should not be considered for addition to the UnitOfWork
* private owned objects list for removal.
*/
@Override
public boolean isCandidateForPrivateOwnedRemoval() {
return false;
}
/**
* INTERNAL
* Return true if this mapping supports cascaded version optimistic locking.
*/
@Override
public boolean isCascadedLockingSupported() {
return true;
}
/**
* INTERNAL:
* Return if this mapping supports change tracking.
*/
@Override
public boolean isChangeTrackingSupported(Project project) {
return false;
}
/**
* INTERNAL:
* Once a descriptor is serialized to the remote session, all its mappings and reference descriptors are traversed.
* Usually the mappings are initialized and the serialized reference descriptors are replaced with local descriptors
* if they already exist in the remote session.
*/
@Override
public void remoteInitialization(DistributedSession session) {
super.remoteInitialization(session);
getReferenceDescriptor().remoteInitialization(session);
}
/**
* PUBLIC:
* indicates whether listOrderField value could be updated in the db. Used only if listOrderField!=null
*/
public boolean isListOrderFieldUpdatable() {
return this.isListOrderFieldUpdatable;
}
/**
* PUBLIC:
* indicates whether listOrderField value could be updated in the db. Used only if listOrderField!=null
* Default value is true.
*/
public void setIsListOrderFieldUpdatable(boolean isUpdatable) {
this.isListOrderFieldUpdatable = isUpdatable;
}
/**
* PUBLIC:
* Set a default source table to use with the source fields of this mapping.
*/
public void setDefaultSourceTable(DatabaseTable table) {
defaultSourceTable = table;
}
/**
* INTERNAL:
* Indicates whether the mapping (or at least one of its nested mappings, at any nested depth)
* references an entity.
* To return true the mapping (or nested mapping) should be ForeignReferenceMapping with non-null and non-aggregate reference descriptor.
*/
@Override
public boolean hasNestedIdentityReference() {
if (hasNestedIdentityReference == null) {
hasNestedIdentityReference = getReferenceDescriptor().hasNestedIdentityReference(true);
}
return hasNestedIdentityReference;
}
}