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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.tuple;
import java.lang.reflect.Constructor;
import org.hibernate.EntityMode;
import org.hibernate.FetchMode;
import org.hibernate.engine.internal.UnsavedValueFactory;
import org.hibernate.engine.spi.CascadeStyle;
import org.hibernate.engine.spi.IdentifierValue;
import org.hibernate.engine.spi.VersionValue;
import org.hibernate.id.IdentifierGenerator;
import org.hibernate.internal.util.ReflectHelper;
import org.hibernate.mapping.KeyValue;
import org.hibernate.mapping.PersistentClass;
import org.hibernate.mapping.Property;
import org.hibernate.mapping.PropertyGeneration;
import org.hibernate.metamodel.binding.AbstractPluralAttributeBinding;
import org.hibernate.metamodel.binding.AssociationAttributeBinding;
import org.hibernate.metamodel.binding.AttributeBinding;
import org.hibernate.metamodel.binding.BasicAttributeBinding;
import org.hibernate.metamodel.binding.EntityBinding;
import org.hibernate.metamodel.binding.SimpleValueBinding;
import org.hibernate.metamodel.binding.SingularAttributeBinding;
import org.hibernate.property.Getter;
import org.hibernate.property.PropertyAccessor;
import org.hibernate.property.PropertyAccessorFactory;
import org.hibernate.type.AssociationType;
import org.hibernate.type.Type;
import org.hibernate.type.VersionType;
/**
* Responsible for generation of runtime metamodel {@link Property} representations.
* Makes distinction between identifier, version, and other (standard) properties.
*
* @author Steve Ebersole
*/
public class PropertyFactory {
/**
* Generates an IdentifierProperty representation of the for a given entity mapping.
*
* @param mappedEntity The mapping definition of the entity.
* @param generator The identifier value generator to use for this identifier.
* @return The appropriate IdentifierProperty definition.
*/
public static IdentifierProperty buildIdentifierProperty(PersistentClass mappedEntity, IdentifierGenerator generator) {
String mappedUnsavedValue = mappedEntity.getIdentifier().getNullValue();
Type type = mappedEntity.getIdentifier().getType();
Property property = mappedEntity.getIdentifierProperty();
IdentifierValue unsavedValue = UnsavedValueFactory.getUnsavedIdentifierValue(
mappedUnsavedValue,
getGetter( property ),
type,
getConstructor(mappedEntity)
);
if ( property == null ) {
// this is a virtual id property...
return new IdentifierProperty(
type,
mappedEntity.hasEmbeddedIdentifier(),
mappedEntity.hasIdentifierMapper(),
unsavedValue,
generator
);
}
else {
return new IdentifierProperty(
property.getName(),
property.getNodeName(),
type,
mappedEntity.hasEmbeddedIdentifier(),
unsavedValue,
generator
);
}
}
/**
* Generates an IdentifierProperty representation of the for a given entity mapping.
*
* @param mappedEntity The mapping definition of the entity.
* @param generator The identifier value generator to use for this identifier.
* @return The appropriate IdentifierProperty definition.
*/
public static IdentifierProperty buildIdentifierProperty(EntityBinding mappedEntity, IdentifierGenerator generator) {
final BasicAttributeBinding property = mappedEntity.getHierarchyDetails().getEntityIdentifier().getValueBinding();
// TODO: the following will cause an NPE with "virtual" IDs; how should they be set?
// (steve) virtual attributes will still be attributes, they will simply be marked as virtual.
// see org.hibernate.metamodel.domain.AbstractAttributeContainer.locateOrCreateVirtualAttribute()
final String mappedUnsavedValue = property.getUnsavedValue();
final Type type = property.getHibernateTypeDescriptor().getResolvedTypeMapping();
IdentifierValue unsavedValue = UnsavedValueFactory.getUnsavedIdentifierValue(
mappedUnsavedValue,
getGetter( property ),
type,
getConstructor( mappedEntity )
);
if ( property == null ) {
// this is a virtual id property...
return new IdentifierProperty(
type,
mappedEntity.getHierarchyDetails().getEntityIdentifier().isEmbedded(),
mappedEntity.getHierarchyDetails().getEntityIdentifier().isIdentifierMapper(),
unsavedValue,
generator
);
}
else {
return new IdentifierProperty(
property.getAttribute().getName(),
null,
type,
mappedEntity.getHierarchyDetails().getEntityIdentifier().isEmbedded(),
unsavedValue,
generator
);
}
}
/**
* Generates a VersionProperty representation for an entity mapping given its
* version mapping Property.
*
* @param property The version mapping Property.
* @param lazyAvailable Is property lazy loading currently available.
* @return The appropriate VersionProperty definition.
*/
public static VersionProperty buildVersionProperty(Property property, boolean lazyAvailable) {
String mappedUnsavedValue = ( (KeyValue) property.getValue() ).getNullValue();
VersionValue unsavedValue = UnsavedValueFactory.getUnsavedVersionValue(
mappedUnsavedValue,
getGetter( property ),
(VersionType) property.getType(),
getConstructor( property.getPersistentClass() )
);
boolean lazy = lazyAvailable && property.isLazy();
return new VersionProperty(
property.getName(),
property.getNodeName(),
property.getValue().getType(),
lazy,
property.isInsertable(),
property.isUpdateable(),
property.getGeneration() == PropertyGeneration.INSERT || property.getGeneration() == PropertyGeneration.ALWAYS,
property.getGeneration() == PropertyGeneration.ALWAYS,
property.isOptional(),
property.isUpdateable() && !lazy,
property.isOptimisticLocked(),
property.getCascadeStyle(),
unsavedValue
);
}
/**
* Generates a VersionProperty representation for an entity mapping given its
* version mapping Property.
*
* @param property The version mapping Property.
* @param lazyAvailable Is property lazy loading currently available.
* @return The appropriate VersionProperty definition.
*/
public static VersionProperty buildVersionProperty(BasicAttributeBinding property, boolean lazyAvailable) {
String mappedUnsavedValue = ( (KeyValue) property.getValue() ).getNullValue();
VersionValue unsavedValue = UnsavedValueFactory.getUnsavedVersionValue(
mappedUnsavedValue,
getGetter( property ),
(VersionType) property.getHibernateTypeDescriptor().getResolvedTypeMapping(),
getConstructor( (EntityBinding) property.getContainer() )
);
boolean lazy = lazyAvailable && property.isLazy();
final CascadeStyle cascadeStyle = property.isAssociation()
? ( (AssociationAttributeBinding) property ).getCascadeStyle()
: CascadeStyle.NONE;
return new VersionProperty(
property.getAttribute().getName(),
null,
property.getHibernateTypeDescriptor().getResolvedTypeMapping(),
lazy,
true, // insertable
true, // updatable
property.getGeneration() == PropertyGeneration.INSERT
|| property.getGeneration() == PropertyGeneration.ALWAYS,
property.getGeneration() == PropertyGeneration.ALWAYS,
property.isNullable(),
!lazy,
property.isIncludedInOptimisticLocking(),
cascadeStyle,
unsavedValue
);
}
/**
* Generate a "standard" (i.e., non-identifier and non-version) based on the given
* mapped property.
*
* @param property The mapped property.
* @param lazyAvailable Is property lazy loading currently available.
* @return The appropriate StandardProperty definition.
*/
public static StandardProperty buildStandardProperty(Property property, boolean lazyAvailable) {
final Type type = property.getValue().getType();
// we need to dirty check collections, since they can cause an owner
// version number increment
// we need to dirty check many-to-ones with not-found="ignore" in order
// to update the cache (not the database), since in this case a null
// entity reference can lose information
boolean alwaysDirtyCheck = type.isAssociationType() &&
( (AssociationType) type ).isAlwaysDirtyChecked();
return new StandardProperty(
property.getName(),
property.getNodeName(),
type,
lazyAvailable && property.isLazy(),
property.isInsertable(),
property.isUpdateable(),
property.getGeneration() == PropertyGeneration.INSERT || property.getGeneration() == PropertyGeneration.ALWAYS,
property.getGeneration() == PropertyGeneration.ALWAYS,
property.isOptional(),
alwaysDirtyCheck || property.isUpdateable(),
property.isOptimisticLocked(),
property.getCascadeStyle(),
property.getValue().getFetchMode()
);
}
/**
* Generate a "standard" (i.e., non-identifier and non-version) based on the given
* mapped property.
*
* @param property The mapped property.
* @param lazyAvailable Is property lazy loading currently available.
* @return The appropriate StandardProperty definition.
*/
public static StandardProperty buildStandardProperty(AttributeBinding property, boolean lazyAvailable) {
final Type type = property.getHibernateTypeDescriptor().getResolvedTypeMapping();
// we need to dirty check collections, since they can cause an owner
// version number increment
// we need to dirty check many-to-ones with not-found="ignore" in order
// to update the cache (not the database), since in this case a null
// entity reference can lose information
final boolean alwaysDirtyCheck = type.isAssociationType() && ( (AssociationType) type ).isAlwaysDirtyChecked();
if ( property.getAttribute().isSingular() ) {
final SingularAttributeBinding singularAttributeBinding = ( SingularAttributeBinding ) property;
final CascadeStyle cascadeStyle = singularAttributeBinding.isAssociation()
? ( (AssociationAttributeBinding) singularAttributeBinding ).getCascadeStyle()
: CascadeStyle.NONE;
final FetchMode fetchMode = singularAttributeBinding.isAssociation()
? ( (AssociationAttributeBinding) singularAttributeBinding ).getFetchMode()
: FetchMode.DEFAULT;
return new StandardProperty(
singularAttributeBinding.getAttribute().getName(),
null,
type,
lazyAvailable && singularAttributeBinding.isLazy(),
true, // insertable
true, // updatable
singularAttributeBinding.getGeneration() == PropertyGeneration.INSERT
|| singularAttributeBinding.getGeneration() == PropertyGeneration.ALWAYS,
singularAttributeBinding.getGeneration() == PropertyGeneration.ALWAYS,
singularAttributeBinding.isNullable(),
alwaysDirtyCheck || areAllValuesIncludedInUpdate( singularAttributeBinding ),
singularAttributeBinding.isIncludedInOptimisticLocking(),
cascadeStyle,
fetchMode
);
}
else {
final AbstractPluralAttributeBinding pluralAttributeBinding = (AbstractPluralAttributeBinding) property;
final CascadeStyle cascadeStyle = pluralAttributeBinding.isAssociation()
? pluralAttributeBinding.getCascadeStyle()
: CascadeStyle.NONE;
final FetchMode fetchMode = pluralAttributeBinding.isAssociation()
? pluralAttributeBinding.getFetchMode()
: FetchMode.DEFAULT;
return new StandardProperty(
pluralAttributeBinding.getAttribute().getName(),
null,
type,
lazyAvailable && pluralAttributeBinding.isLazy(),
// TODO: fix this when HHH-6356 is fixed; for now assume AbstractPluralAttributeBinding is updatable and insertable
true, // pluralAttributeBinding.isInsertable(),
true, //pluralAttributeBinding.isUpdatable(),
false,
false,
false, // nullable - not sure what that means for a collection
// TODO: fix this when HHH-6356 is fixed; for now assume AbstractPluralAttributeBinding is updatable and insertable
//alwaysDirtyCheck || pluralAttributeBinding.isUpdatable(),
true,
pluralAttributeBinding.isIncludedInOptimisticLocking(),
cascadeStyle,
fetchMode
);
}
}
private static boolean areAllValuesIncludedInUpdate(SingularAttributeBinding attributeBinding) {
if ( attributeBinding.hasDerivedValue() ) {
return false;
}
for ( SimpleValueBinding valueBinding : attributeBinding.getSimpleValueBindings() ) {
if ( ! valueBinding.isIncludeInUpdate() ) {
return false;
}
}
return true;
}
private static Constructor getConstructor(PersistentClass persistentClass) {
if ( persistentClass == null || !persistentClass.hasPojoRepresentation() ) {
return null;
}
try {
return ReflectHelper.getDefaultConstructor( persistentClass.getMappedClass() );
}
catch( Throwable t ) {
return null;
}
}
private static Constructor getConstructor(EntityBinding entityBinding) {
if ( entityBinding == null || entityBinding.getEntity() == null ) {
return null;
}
try {
return ReflectHelper.getDefaultConstructor( entityBinding.getEntity().getClassReference() );
}
catch( Throwable t ) {
return null;
}
}
private static Getter getGetter(Property mappingProperty) {
if ( mappingProperty == null || !mappingProperty.getPersistentClass().hasPojoRepresentation() ) {
return null;
}
PropertyAccessor pa = PropertyAccessorFactory.getPropertyAccessor( mappingProperty, EntityMode.POJO );
return pa.getGetter( mappingProperty.getPersistentClass().getMappedClass(), mappingProperty.getName() );
}
private static Getter getGetter(AttributeBinding mappingProperty) {
if ( mappingProperty == null || mappingProperty.getContainer().getClassReference() == null ) {
return null;
}
PropertyAccessor pa = PropertyAccessorFactory.getPropertyAccessor( mappingProperty, EntityMode.POJO );
return pa.getGetter(
mappingProperty.getContainer().getClassReference(),
mappingProperty.getAttribute().getName()
);
}
}
