/*
* 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.ManyToOneField;
import com.caucho.amber.manager.AmberPersistenceUnit;
import com.caucho.amber.type.EntityType;
import com.caucho.amber.type.MappedSuperclassType;
import com.caucho.bytecode.JClass;
import com.caucho.config.ConfigException;
import com.caucho.util.L10N;
import java.lang.reflect.AccessibleObject;
import java.util.HashMap;
import javax.persistence.JoinColumn;
import javax.persistence.JoinColumns;
import javax.persistence.ManyToOne;
/**
* <many-to-one> tag in orm.xml
*/
class ManyToOneConfig extends AbstractRelationConfig
{
private static final L10N L = new L10N(ManyToOneConfig.class);
private BaseConfigIntrospector _introspector;
private EntityType _sourceType;
private EntityType _targetType;
private AccessibleObject _field;
private String _fieldName;
private Class _fieldType;
// attributes
private boolean _isOptional = true;
// elements
private HashMap<String,JoinColumnConfig> _joinColumnMap
= new HashMap<String,JoinColumnConfig>();
ManyToOneConfig(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 JoinColumnConfig getJoinColumn(String name)
{
return _joinColumnMap.get(name);
}
public void addJoinColumn(JoinColumnConfig joinColumn)
{
_joinColumnMap.put(joinColumn.getReferencedColumnName(),
joinColumn);
}
public HashMap<String, JoinColumnConfig> getJoinColumnMap()
{
return _joinColumnMap;
}
public EntityType getRelatedType()
{
return _sourceType;
}
public void complete()
throws ConfigException
{
addManyToOne();
}
private void introspect()
{
ManyToOne manyToOne = _field.getAnnotation(ManyToOne.class);
if (manyToOne != null)
introspectManyToOne(manyToOne);
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 introspectManyToOne(ManyToOne manyToOne)
{
Class targetClass = manyToOne.targetEntity();
if (void.class.equals(targetClass))
targetClass = _fieldType;
setTargetEntity(targetClass);
setCascadeTypes(manyToOne.cascade());
setFetch(manyToOne.fetch());
_isOptional = manyToOne.optional();
}
private void introspectJoinColumns(JoinColumn []joinColumns)
{
for (JoinColumn joinColumn : joinColumns) {
addJoinColumn(new JoinColumnConfig(joinColumn));
}
}
void addManyToOne()
throws ConfigException
{
AmberPersistenceUnit persistenceUnit = _sourceType.getPersistenceUnit();
String targetName = _fieldType.getName();
ManyToOneField manyToOneField;
manyToOneField = new ManyToOneField(_sourceType, _fieldName, getCascade(), true);
EntityType targetType = persistenceUnit.createEntity(getTargetEntity());
manyToOneField.setType(targetType);
manyToOneField.setLazy(isFetchLazy());
if (_joinColumnMap.size() > 0)
manyToOneField.setJoinColumnMap(_joinColumnMap);
_sourceType.addField(manyToOneField);
// jpa/0ge3
if (_sourceType instanceof MappedSuperclassType)
return;
if (_joinColumnMap.size() > 0)
validateJoinColumns(_field, _fieldName, _joinColumnMap, targetType);
manyToOneField.init();
}
}