/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Rodrigo Westrupp
*/
package com.caucho.amber.cfg;
import com.caucho.amber.field.AmberField;
import com.caucho.amber.field.DependentEntityOneToOneField;
import com.caucho.amber.field.ManyToOneField;
import com.caucho.amber.manager.AmberPersistenceUnit;
import com.caucho.amber.type.EntityType;
import com.caucho.amber.type.MappedSuperclassType;
import com.caucho.config.ConfigException;
import com.caucho.util.L10N;
import java.lang.reflect.AccessibleObject;
import java.util.ArrayList;
import java.util.HashMap;
import javax.persistence.JoinColumn;
import javax.persistence.JoinColumns;
import javax.persistence.OneToOne;
/**
* <one-to-one> tag in orm.xml
*/
class OneToOneConfig extends AbstractRelationConfig
{
private static final L10N L = new L10N(OneToOneConfig.class);
private BaseConfigIntrospector _introspector;
private EntityType _sourceType;
private EntityType _targetType;
private AccessibleObject _field;
private String _fieldName;
private Class _fieldType;
// attributes
private boolean _isOptional;
private String _mappedBy;
// elements
private HashMap<String,PrimaryKeyJoinColumnConfig> _primaryKeyJoinColumnMap
= new HashMap<String,PrimaryKeyJoinColumnConfig>();
private HashMap<String,JoinColumnConfig> _joinColumnMap
= new HashMap<String,JoinColumnConfig>();
OneToOneConfig(BaseConfigIntrospector introspector,
EntityType sourceType,
AccessibleObject field,
String fieldName,
Class fieldType)
{
_introspector = introspector;
_sourceType = sourceType;
_field = field;
_fieldName = fieldName;
_fieldType = fieldType;
introspect();
}
public boolean getOptional()
{
return _isOptional;
}
public void setOptional(boolean isOptional)
{
_isOptional = isOptional;
}
public String getMappedBy()
{
return _mappedBy;
}
public void setMappedBy(String mappedBy)
{
_mappedBy = mappedBy;
}
public boolean isOwningSide()
{
return "".equals(_mappedBy);
}
public PrimaryKeyJoinColumnConfig getPrimaryKeyJoinColumn(String columnName)
{
return _primaryKeyJoinColumnMap.get(columnName);
}
public void addPrimaryKeyJoinColumn(PrimaryKeyJoinColumnConfig primaryKeyJoinColumn)
{
_primaryKeyJoinColumnMap.put(primaryKeyJoinColumn.getName(),
primaryKeyJoinColumn);
}
public HashMap<String, PrimaryKeyJoinColumnConfig> getPrimaryKeyJoinColumnMap()
{
return _primaryKeyJoinColumnMap;
}
public JoinColumnConfig getJoinColumn(String name)
{
return _joinColumnMap.get(name);
}
public void addJoinColumn(JoinColumnConfig joinColumn)
{
_joinColumnMap.put(joinColumn.getName(),
joinColumn);
}
public HashMap<String, JoinColumnConfig> getJoinColumnMap()
{
return _joinColumnMap;
}
private void introspect()
{
OneToOne oneToOne = _field.getAnnotation(OneToOne.class);
if (oneToOne != null)
introspectOneToOne(oneToOne);
JoinColumn joinColumnAnn = _field.getAnnotation(JoinColumn.class);
JoinColumns joinColumnsAnn = _field.getAnnotation(JoinColumns.class);
if (joinColumnsAnn != null && joinColumnAnn != null) {
throw error(_field, L.l("{0} may not have both @JoinColumn and @JoinColumns",
_fieldName));
}
if (joinColumnsAnn != null)
introspectJoinColumns(joinColumnsAnn.value());
else if (joinColumnAnn != null)
introspectJoinColumns(new JoinColumn[] { joinColumnAnn });
}
private void introspectOneToOne(OneToOne oneToOne)
{
Class targetClass = oneToOne.targetEntity();
if (void.class.equals(targetClass))
targetClass = _fieldType;
setTargetEntity(targetClass);
setCascadeTypes(oneToOne.cascade());
setFetch(oneToOne.fetch());
_isOptional = oneToOne.optional();
_mappedBy = oneToOne.mappedBy();
}
private void introspectJoinColumns(JoinColumn []joinColumns)
{
for (JoinColumn joinColumn : joinColumns) {
addJoinColumn(new JoinColumnConfig(joinColumn));
}
}
@Override
public EntityType getRelatedType()
{
return _sourceType;
}
@Override
public void complete()
{
AmberPersistenceUnit persistenceUnit = _sourceType.getPersistenceUnit();
String targetName = _fieldType.getName();
EntityType targetType = persistenceUnit.createEntity(getTargetEntity());
if (isOwningSide()) {
addManyToOne();
// XXX: set unique
}
else {
addDependentOneToOne();
}
}
private void addManyToOne()
throws ConfigException
{
AmberPersistenceUnit persistenceUnit = _sourceType.getPersistenceUnit();
EntityType targetType = persistenceUnit.createEntity(getTargetEntity());
ManyToOneField manyToOneField;
manyToOneField = new ManyToOneField(_sourceType, _fieldName,
getCascade(), false);
manyToOneField.setType(targetType);
manyToOneField.setLazy(isFetchLazy());
manyToOneField.setJoinColumnMap(_joinColumnMap);
_sourceType.addField(manyToOneField);
// jpa/0ge3
if (_sourceType instanceof MappedSuperclassType)
return;
validateJoinColumns(_field, _fieldName, _joinColumnMap, targetType);
manyToOneField.init();
}
private void addDependentOneToOne()
{
AmberPersistenceUnit persistenceUnit = _sourceType.getPersistenceUnit();
EntityType targetType = persistenceUnit.createEntity(getTargetEntity());
// Owner
ManyToOneField sourceField
= getSourceField(targetType, _mappedBy, _sourceType);
if (sourceField == null) {
throw error(_field, L.l("OneToOne target '{0}' does not have a matching ManyToOne relation.",
targetType.getName()));
}
DependentEntityOneToOneField oneToOne;
oneToOne = new DependentEntityOneToOneField(_sourceType, _fieldName, getCascade());
oneToOne.setTargetField(sourceField);
sourceField.setTargetField(oneToOne);
oneToOne.setLazy(isFetchLazy());
_sourceType.addField(oneToOne);
}
private ManyToOneField getSourceField(EntityType targetType,
String mappedBy,
EntityType sourceType)
{
do {
ArrayList<AmberField> fields = targetType.getFields();
for (AmberField field : fields) {
// jpa/0o07: there is no mappedBy at all on any sides.
if ("".equals(mappedBy) || mappedBy == null) {
if (field.getJavaType().isAssignableFrom(sourceType.getBeanClass()))
return (ManyToOneField) field;
}
else if (field.getName().equals(mappedBy))
return (ManyToOneField) field;
}
// jpa/0ge4
targetType = targetType.getParentType();
} while (targetType != null);
return null;
}
}