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org.apache.openjpa.persistence.jdbc.AnnotationPersistenceMappingSerializer Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.persistence.jdbc;
import java.lang.annotation.Annotation;
import java.sql.Types;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import jakarta.persistence.ColumnResult;
import jakarta.persistence.DiscriminatorColumn;
import jakarta.persistence.DiscriminatorValue;
import jakarta.persistence.EntityResult;
import jakarta.persistence.EnumType;
import jakarta.persistence.Enumerated;
import jakarta.persistence.FieldResult;
import jakarta.persistence.Inheritance;
import jakarta.persistence.InheritanceType;
import jakarta.persistence.JoinColumn;
import jakarta.persistence.JoinColumns;
import jakarta.persistence.JoinTable;
import jakarta.persistence.Lob;
import jakarta.persistence.PrimaryKeyJoinColumn;
import jakarta.persistence.PrimaryKeyJoinColumns;
import jakarta.persistence.SecondaryTable;
import jakarta.persistence.SqlResultSetMapping;
import jakarta.persistence.Table;
import jakarta.persistence.TableGenerator;
import jakarta.persistence.Temporal;
import jakarta.persistence.TemporalType;
import jakarta.persistence.UniqueConstraint;
import org.apache.openjpa.jdbc.conf.JDBCConfiguration;
import org.apache.openjpa.jdbc.meta.ClassMapping;
import org.apache.openjpa.jdbc.meta.ClassMappingInfo;
import org.apache.openjpa.jdbc.meta.DiscriminatorMappingInfo;
import org.apache.openjpa.jdbc.meta.FieldMapping;
import org.apache.openjpa.jdbc.meta.MappingInfo;
import org.apache.openjpa.jdbc.meta.MappingRepository;
import org.apache.openjpa.jdbc.meta.QueryResultMapping;
import org.apache.openjpa.jdbc.meta.QueryResultMapping.PCResult;
import org.apache.openjpa.jdbc.meta.SequenceMapping;
import org.apache.openjpa.jdbc.meta.ValueMappingInfo;
import org.apache.openjpa.jdbc.meta.strats.EnumValueHandler;
import org.apache.openjpa.jdbc.meta.strats.FlatClassStrategy;
import org.apache.openjpa.jdbc.meta.strats.FullClassStrategy;
import org.apache.openjpa.jdbc.meta.strats.VerticalClassStrategy;
import org.apache.openjpa.jdbc.schema.Column;
import org.apache.openjpa.jdbc.schema.Unique;
import org.apache.openjpa.jdbc.sql.DBDictionary;
import org.apache.openjpa.lib.util.ClassUtil;
import org.apache.openjpa.lib.util.StringUtil;
import org.apache.openjpa.meta.ClassMetaData;
import org.apache.openjpa.meta.FieldMetaData;
import org.apache.openjpa.meta.JavaTypes;
import org.apache.openjpa.meta.MetaDataModes;
import org.apache.openjpa.meta.MetaDataRepository;
import org.apache.openjpa.meta.SequenceMetaData;
import org.apache.openjpa.persistence.AnnotationBuilder;
import org.apache.openjpa.persistence.AnnotationPersistenceMetaDataSerializer;
import org.apache.openjpa.persistence.PersistenceStrategy;
/**
* Serializes persistence mappings as annotations.
*
* @since 1.0.0
* @author Steve Kim
* @author Gokhan Ergul
*/
public class AnnotationPersistenceMappingSerializer
extends AnnotationPersistenceMetaDataSerializer {
private static final int TYPE_RESULTMAP = TYPE_QUERY + 1;
private List _results = null;
private boolean _sync = false;
private Map> _rsmAnnos = null;
/**
* Constructor. Supply configuration.
*/
public AnnotationPersistenceMappingSerializer(JDBCConfiguration conf) {
super(conf);
}
/**
* Whether to automatically synchronize mapping info with data available
* from mapped components before serialization. Defaults to false.
*/
public boolean getSyncMappingInfo() {
return _sync;
}
/**
* Whether to automatically synchronize mapping info with data available
* from mapped components before serialization. Defaults to false.
*/
public void setSyncMappingInfo(boolean sync) {
_sync = sync;
}
/**
* Adds the given result set mapping to local cache.
*/
public void addQueryResultMapping(QueryResultMapping meta) {
if (_results == null)
_results = new ArrayList<>();
_results.add(meta);
}
/**
* Removes given result set mapping from the local cache.
*/
public boolean removeQueryResultMapping(QueryResultMapping meta) {
return _results != null && _results.remove(meta);
}
@Override
public void addAll(MetaDataRepository repos) {
super.addAll(repos);
for (QueryResultMapping res : ((MappingRepository) repos).getQueryResultMappings())
addQueryResultMapping(res);
}
@Override
public boolean removeAll(MetaDataRepository repos) {
boolean removed = super.removeAll(repos);
for (QueryResultMapping res : ((MappingRepository) repos).getQueryResultMappings())
removed |= removeQueryResultMapping(res);
return removed;
}
@Override
public void clear() {
super.clear();
if (_results != null)
_results.clear();
}
/**
* Add an annotation builder to list of builders for the specified
* class metadata.
*/
protected void addAnnotation(AnnotationBuilder ab, QueryResultMapping meta)
{
if (_rsmAnnos == null)
_rsmAnnos = new HashMap<>();
List list = _rsmAnnos.computeIfAbsent(meta, k -> new ArrayList<>());
list.add(ab);
}
/**
* Creates an an annotation builder for the specified class metadata
* and adds it to list of builders.
*/
protected AnnotationBuilder addAnnotation(
Class annType, QueryResultMapping meta) {
AnnotationBuilder ab = newAnnotationBuilder(annType);
if (meta == null)
return ab;
addAnnotation(ab, meta);
return ab;
}
@Override
protected void serializeClass(ClassMetaData meta) {
if (_sync && isMappingMode() && meta instanceof ClassMapping) {
// sync if resolved and mapped
ClassMapping cls = (ClassMapping) meta;
if ((cls.getResolve() & MetaDataModes.MODE_MAPPING) != 0 &&
cls.isMapped()) {
cls.syncMappingInfo();
cls.getDiscriminator().syncMappingInfo();
cls.getVersion().syncMappingInfo();
FieldMapping[] fields;
if (cls.getEmbeddingMetaData() == null)
fields = cls.getDefinedFieldMappings();
else
fields = cls.getFieldMappings();
for (FieldMapping f : fields)
f.syncMappingInfo();
}
}
super.serializeClass(meta);
}
@Override
protected void serializeClassMappingContent(ClassMetaData mapping) {
ClassMapping cls = (ClassMapping) mapping;
ClassMappingInfo info = cls.getMappingInfo();
AnnotationBuilder abTable = addAnnotation(Table.class, mapping);
serializeTable(info.getTableName(), ClassUtil.getClassName(mapping.getDescribedType()), null,
info.getUniques(info.getTableName()), abTable);
serializeColumns(info, ColType.PK_JOIN, null, abTable, cls);
for (String second : info.getSecondaryTableNames()) {
AnnotationBuilder abSecTable =
addAnnotation(SecondaryTable.class, mapping);
serializeTable(second, null, info, info.getUniques(second),
abSecTable);
}
}
@Override
protected void serializeInheritanceContent(ClassMetaData mapping) {
ClassMapping cls = (ClassMapping) mapping;
ClassMappingInfo info = cls.getMappingInfo();
DiscriminatorMappingInfo dinfo = cls.getDiscriminator()
.getMappingInfo();
String strat = info.getHierarchyStrategy();
if (null == strat)
return;
String itypecls = ClassUtil.getClassName(InheritanceType.class);
AnnotationBuilder abInheritance =
addAnnotation(Inheritance.class, mapping);
if (FlatClassStrategy.ALIAS.equals(strat))
abInheritance.add("strategy", itypecls + ".SINGLE_TABLE");
else if (VerticalClassStrategy.ALIAS.equals(strat))
abInheritance.add("strategy", itypecls + ".JOINED");
else if (FullClassStrategy.ALIAS.equals(strat))
abInheritance.add("strategy", itypecls + ".TABLE_PER_CLASS");
if (dinfo.getValue() != null) {
AnnotationBuilder abDiscVal =
addAnnotation(DiscriminatorValue.class, mapping);
abDiscVal.add(null, dinfo.getValue());
}
AnnotationBuilder abDiscCol =
addAnnotation(DiscriminatorColumn.class, mapping);
serializeColumns(dinfo, ColType.DISC, null, abDiscCol, null);
}
/**
* Serialize table optionally listing primary-key-joins stored
* in the given {@link org.apache.openjpa.jdbc.meta.ClassMappingInfo}.
*/
private void serializeTable(String table, String defaultName,
ClassMappingInfo secondaryInfo, Unique[] uniques,
AnnotationBuilder ab) {
List cols = null;
if (secondaryInfo != null)
cols = secondaryInfo.getSecondaryTableJoinColumns
(table);
boolean print = (cols != null && cols.size() > 0) ||
(uniques != null && uniques.length > 0);
if (table != null
&& (defaultName == null || !defaultName.equals(table))) {
print = true;
int index = table.indexOf('.');
if (index < 0)
ab.add("name", table);
else {
Map classMetaData = getClassMetaData();
Object[] keySet = null;
if(classMetaData != null)
{
keySet = classMetaData.keySet().toArray();
}
if((keySet != null) && (keySet.length > 0) && classMetaData.get(keySet[0]).getUseSchemaElement())
{
ab.add("schema", table.substring(0, index));
}
ab.add("name", table.substring(index + 1));
}
}
if (print) {
if (cols != null) {
for (Column col : cols)
serializeColumn(col, ColType.PK_JOIN,
null, false, ab, null);
}
if (uniques != null) {
for (Unique unique: uniques) {
AnnotationBuilder abUniqueConst =
newAnnotationBuilder(UniqueConstraint.class);
serializeUniqueConstraint(unique, abUniqueConst);
ab.add("uniqueConstraints", abUniqueConst);
}
}
}
}
@Override
protected boolean serializeAttributeOverride(FieldMetaData fmd,
FieldMetaData orig) {
if (orig == null || fmd == orig)
return false;
FieldMapping field = (FieldMapping) fmd;
FieldMapping field2 = (FieldMapping) orig;
if (field.getMappingInfo().hasSchemaComponents()
|| field2.getMappingInfo().hasSchemaComponents())
return true;
ValueMappingInfo info = field.getValueInfo();
List cols = info.getColumns();
if (cols == null || cols.size() == 0)
return false;
ValueMappingInfo info2 = field2.getValueInfo();
List cols2 = info2.getColumns();
if (cols2 == null || cols2.size() != cols.size())
return true;
if (cols.size() != 1)
return true;
Column col;
Column col2;
for (int i = 0; i < cols.size(); i++) {
col = cols.get(i);
col2 = cols2.get(i);
if (!Objects.equals(col.getName(), col2.getName()))
return true;
if (!Objects.equals(col.getTypeName(), col2.getTypeName()))
return true;
if (col.getSize() != col2.getSize())
return true;
if (col.getDecimalDigits() != col2.getDecimalDigits())
return true;
if (col.getFlag(Column.FLAG_UNINSERTABLE)
!= col2.getFlag(Column.FLAG_UNINSERTABLE))
return true;
if (col.getFlag(Column.FLAG_UNUPDATABLE)
!= col2.getFlag(Column.FLAG_UNUPDATABLE))
return true;
}
return false;
}
@Override
protected void serializeAttributeOverrideMappingContent(FieldMetaData fmd,
FieldMetaData orig, AnnotationBuilder ab) {
FieldMapping fm = (FieldMapping) fmd;
serializeColumns(fm.getValueInfo(), ColType.COL, fm.getMappingInfo()
.getTableName(), ab, fmd);
}
@Override
protected PersistenceStrategy getStrategy(FieldMetaData fmd) {
PersistenceStrategy strat = super.getStrategy(fmd);
FieldMapping field = (FieldMapping) fmd;
switch (strat) {
case MANY_MANY:
// we can differentiate a one-many by the fact that there is no
// secondary table join, or the fk is unique
if (field.getMappedBy() == null
&& (field.getMappingInfo().getJoinDirection()
== MappingInfo.JOIN_NONE
|| field.getElementMapping().getValueInfo().getUnique()
!= null))
return PersistenceStrategy.ONE_MANY;
break;
case MANY_ONE:
// inverse join cols or unique fk?
if (field.getValueInfo().getJoinDirection()
== MappingInfo.JOIN_INVERSE
|| field.getValueInfo().getUnique() != null)
return PersistenceStrategy.ONE_ONE;
// scan for primary-key-join-column
List cols = field.getValueInfo().getColumns();
boolean pkJoin = cols != null && cols.size() > 0;
for (int i = 0; pkJoin && i < cols.size(); i++)
pkJoin = cols.get(i).getFlag(Column.FLAG_PK_JOIN);
if (pkJoin)
return PersistenceStrategy.ONE_ONE;
break;
}
return strat;
}
@Override
protected void serializeFieldMappingContent(FieldMetaData fmd,
PersistenceStrategy strategy, AnnotationBuilder ab) {
if (fmd.getMappedBy() != null)
return;
// while I'd like to do auto detection based on join directions, etc.
// the distinguished column / table / etc names forces our hand
// esp for OpenJPA custom mappings.
FieldMapping field = (FieldMapping) fmd;
switch (strategy) {
case ONE_ONE:
case MANY_ONE:
serializeColumns(field.getValueInfo(), ColType.JOIN,
field.getMappingInfo().getTableName(), null, fmd);
return;
case ONE_MANY:
if (field.getMappingInfo().getJoinDirection() ==
MappingInfo.JOIN_NONE) {
serializeColumns(field.getElementMapping().getValueInfo(),
ColType.JOIN, null, null, fmd);
return;
}
// else no break
case MANY_MANY:
if (field.getMappingInfo().hasSchemaComponents()
|| field.getElementMapping().getValueInfo()
.hasSchemaComponents()) {
AnnotationBuilder abJoinTbl =
addAnnotation(JoinTable.class, fmd);
String table = field.getMappingInfo().getTableName();
if (table != null) {
int index = table.indexOf('.');
if (index < 0)
abJoinTbl.add("name", table);
else {
abJoinTbl.add("schema", table.substring(0, index));
abJoinTbl.add("name", table.substring(index + 1));
}
}
serializeColumns(field.getMappingInfo(),
ColType.JOIN, null, abJoinTbl, null);
serializeColumns(field.getElementMapping().getValueInfo(),
ColType.INVERSE, null, abJoinTbl, null);
}
return;
}
serializeColumns(field.getValueInfo(), ColType.COL,
field.getMappingInfo().getTableName(), null, fmd);
if (strategy == PersistenceStrategy.BASIC && isLob(field)) {
addAnnotation(Lob.class, fmd);
}
TemporalType temporal = getTemporal(field);
if (temporal != null) {
addAnnotation(Temporal.class, fmd).
add(null, temporal);
}
EnumType enumType = getEnumType(field);
if (enumType != null && enumType != EnumType.ORDINAL) {
addAnnotation(Enumerated.class, fmd).
add(null, enumType);
}
}
/**
* Determine if the field is a lob.
*/
private boolean isLob(FieldMapping field) {
for (Column col : field.getValueInfo().getColumns())
if (col.getType() == Types.BLOB || col.getType() == Types.CLOB)
return true;
return false;
}
/**
* Return field's temporal type.
*/
private TemporalType getTemporal(FieldMapping field) {
if (field.getDeclaredTypeCode() != JavaTypes.DATE
&& field.getDeclaredTypeCode() != JavaTypes.CALENDAR)
{
return null;
}
DBDictionary dict = ((JDBCConfiguration) getConfiguration())
.getDBDictionaryInstance();
int def = dict.getJDBCType(field.getTypeCode(), false);
for (Column col : field.getValueInfo().getColumns()) {
if (col.getType() == def) {
continue;
}
switch (col.getType()) {
case Types.DATE:
return TemporalType.DATE;
case Types.TIME:
return TemporalType.TIME;
case Types.TIMESTAMP:
return TemporalType.TIMESTAMP;
}
}
return null;
}
/**
* Return enum type for the field.
*/
protected EnumType getEnumType(FieldMapping field) {
if (field.getDeclaredTypeCode() != JavaTypes.OBJECT
&& field.getDeclaredTypeCode() != JavaTypes.ENUM)
{
return null;
}
if (!(field.getHandler() instanceof EnumValueHandler)) {
return null;
}
return ((EnumValueHandler) field.getHandler()).getStoreOrdinal()
? EnumType.ORDINAL : EnumType.STRING;
}
/**
* Serialize the columns in the given mapping info.
*/
private void serializeColumns(MappingInfo info, ColType type,
String secondary, AnnotationBuilder ab, Object meta) {
List cols = info.getColumns();
if (cols == null) {
return;
}
AnnotationBuilder abContainer = ab;
if (cols.size() > 1) {
Class grpType = type.getColumnGroupAnnotationType();
if (null != grpType) {
AnnotationBuilder abGrp = newAnnotationBuilder(grpType);
if (null == ab) {
addAnnotation(abGrp, meta);
} else {
ab.add(null, abGrp);
}
abContainer = abGrp;
}
}
for (Column col : cols) {
serializeColumn(col, type, secondary,
info.getUnique() != null, abContainer, meta);
}
}
/**
* Serialize a single column.
*/
private void serializeColumn(Column col, ColType type, String secondary,
boolean unique, AnnotationBuilder ab, Object meta) {
FieldMetaData fmd = meta instanceof FieldMetaData ?
(FieldMetaData) meta : null;
AnnotationBuilder abCol = newAnnotationBuilder(
type.getColumnAnnotationType());
if (col.getName() != null && (null == fmd ||
!col.getName().equalsIgnoreCase(fmd.getName())))
abCol.add("name", col.getName());
if (col.getTypeName() != null)
abCol.add("columnDefinition", col.getTypeName());
if (col.getTarget() != null
&& (type == ColType.JOIN || type == ColType.INVERSE
|| type == ColType.PK_JOIN))
abCol.add("referencedColumnName", col.getTarget());
if (type == ColType.COL || type == ColType.JOIN
|| type == ColType.PK_JOIN) {
if (unique)
abCol.add("unique", true);
if (col.isNotNull())
abCol.add("nullable", false);
if (col.getFlag(Column.FLAG_UNINSERTABLE))
abCol.add("insertable", false);
if (col.getFlag(Column.FLAG_UNUPDATABLE))
abCol.add("updatable", false);
if (secondary != null)
abCol.add("table", secondary);
if (type == ColType.COL) {
if (col.getSize() > 0 && col.getSize() != 255)
abCol.add("length", col.getSize());
if (col.getDecimalDigits() != 0)
abCol.add("scale", col.getDecimalDigits());
}
}
if (type != ColType.COL || abCol.hasComponents()) {
if (null != ab) {
String key = null;
if (ab.getType() == JoinTable.class) {
switch(type) {
case JOIN:
key = "joinColumns";
break;
case INVERSE:
key = "inverseJoinColumns";
break;
}
}
ab.add(key, abCol);
} else {
addAnnotation(abCol, meta);
}
}
}
private void serializeUniqueConstraint(Unique unique,
AnnotationBuilder ab) {
StringBuilder sb = new StringBuilder();
Column[] columns = unique.getColumns();
for (Column column:columns) {
if (sb.length() > 0)
sb.append(", ");
sb.append(column.getName());
}
if (columns.length > 1)
sb.insert(0, "{").append("}");
ab.add("columnNames", sb.toString());
if (StringUtil.isNotEmpty(unique.getName())) {
ab.add("name", unique.getName());
}
}
@Override
protected SerializationComparator newSerializationComparator() {
return new AnnotationPersistenceMappingSerializer.
MappingSerializationComparator();
}
@Override
protected void addSystemMappingElements(Collection toSerialize) {
if (isQueryMode())
toSerialize.addAll(getQueryResultMappings(null));
}
@Override
protected int type(Object o) {
int type = super.type(o);
if (type == -1 && o instanceof QueryResultMapping)
return TYPE_RESULTMAP;
return type;
}
/**
* Return the result set mappings for the given scope.
*/
private List getQueryResultMappings(ClassMetaData cm) {
if (_results == null || _results.isEmpty())
return Collections.EMPTY_LIST;
List result = null;
for (int i = 0; i < _results.size(); i++) {
QueryResultMapping element = _results.get(i);
if ((cm == null && element.getSourceScope() != null) || (cm != null
&& element.getSourceScope() != cm.getDescribedType()))
continue;
if (result == null)
result = new ArrayList<>(_results.size() - i);
result.add(element);
}
return (result == null)
? (List) Collections.EMPTY_LIST : result;
}
@Override
protected void serializeSystemMappingElement(Object obj) {
if (obj instanceof QueryResultMapping)
serializeQueryResultMapping((QueryResultMapping) obj, null);
}
@Override
protected void serializeQueryMappings(ClassMetaData meta) {
for (QueryResultMapping res : getQueryResultMappings(meta))
serializeQueryResultMapping(res, meta);
}
/**
* Serialize given result set mapping.
*/
private void serializeQueryResultMapping(QueryResultMapping meta,
ClassMetaData clsmeta) {
AnnotationBuilder ab = addAnnotation(SqlResultSetMapping.class, meta);
if (null != clsmeta)
addAnnotation(ab, clsmeta);
ab.add("name", meta.getName());
for (QueryResultMapping.PCResult pc : meta.getPCResults()) {
AnnotationBuilder abEntRes =
newAnnotationBuilder(EntityResult.class);
ab.add("entities", abEntRes);
abEntRes.add("entityClass", pc.getCandidateType());
Object discrim = pc.getMapping(PCResult.DISCRIMINATOR);
if (discrim != null)
abEntRes.add("discriminatorColumn", discrim.toString());
for (String path : pc.getMappingPaths()) {
AnnotationBuilder abFldRes =
newAnnotationBuilder(FieldResult.class);
abEntRes.add("fields", abFldRes);
abFldRes.add("name", path);
abFldRes.add("column", pc.getMapping(path).toString());
}
}
for (Object col : meta.getColumnResults()) {
AnnotationBuilder abColRes =
newAnnotationBuilder(ColumnResult.class);
abColRes.add("name", col.toString());
}
}
@Override
protected void serializeSequence(SequenceMetaData meta) {
if (SequenceMapping.IMPL_VALUE_TABLE.equals(meta.getSequencePlugin())) {
super.serializeSequence(meta);
return;
}
AnnotationBuilder abTblGen = addAnnotation(TableGenerator.class, meta);
SequenceMapping seq = (SequenceMapping) meta;
abTblGen.add("name", seq.getName());
String table = seq.getTable();
if (table != null) {
int dotIdx = table.indexOf('.');
if (dotIdx == -1)
abTblGen.add("table", table);
else {
abTblGen.add("table", table.substring(dotIdx + 1));
abTblGen.add("schema", table.substring(0, dotIdx));
}
}
if (!StringUtil.isEmpty(seq.getPrimaryKeyColumn()))
abTblGen.add("pkColumnName", seq.getPrimaryKeyColumn());
if (!StringUtil.isEmpty(seq.getSequenceColumn()))
abTblGen.add("valueColumnName", seq.getSequenceColumn());
if (!StringUtil.isEmpty(seq.getPrimaryKeyValue()))
abTblGen.add("pkColumnValue", seq.getPrimaryKeyValue());
if (seq.getAllocate() != 50 && seq.getAllocate() != -1)
abTblGen.add("allocationSize", seq.getAllocate() + "");
if (seq.getInitialValue() != 0 && seq.getInitialValue() != -1)
abTblGen.add("initialValue", seq.getInitialValue() + "");
}
/**
* Column types serialized under different names.
*/
private enum ColType {
COL,
JOIN,
INVERSE,
PK_JOIN,
DISC;
private Class getColumnAnnotationType() {
switch(this) {
case COL:
return jakarta.persistence.Column.class;
case JOIN:
case INVERSE:
return JoinColumn.class;
case PK_JOIN:
return PrimaryKeyJoinColumn.class;
case DISC:
return DiscriminatorColumn.class;
}
return null;
}
private Class getColumnGroupAnnotationType() {
switch(this) {
case JOIN:
case INVERSE:
return JoinColumns.class;
case PK_JOIN:
return PrimaryKeyJoinColumns.class;
}
return null;
}
}
/**
* Extends {@link SerializationComparator} for store-specific tags such
* as <sql-result-set-mapping>.
*
* @author Pinaki Poddar
*/
protected class MappingSerializationComparator
extends SerializationComparator {
private static final long serialVersionUID = 1L;
@Override
protected int compareUnknown(Object o1, Object o2) {
if (!(o1 instanceof QueryResultMapping))
return super.compareUnknown(o1, o2);
QueryResultMapping res1 = (QueryResultMapping) o1;
QueryResultMapping res2 = (QueryResultMapping) o2;
// system scope before class scope
Object scope1 = res1.getSourceScope();
Object scope2 = res2.getSourceScope();
if (scope1 == null && scope2 != null)
return -1;
if (scope1 != null && scope2 == null)
return 1;
// compare on listing index, or if none/same, use name
int listingIndex1 = res1.getListingIndex();
int listingIndex2 = res2.getListingIndex();
if (listingIndex1 != listingIndex2)
return listingIndex1 - listingIndex2;
return res1.getName ().compareTo (res2.getName ());
}
}
}
