/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ejb.plugins.cmp.jdbc;
import java.lang.reflect.Method;
import java.util.List;
import java.util.ArrayList;
import org.jboss.ejb.EntityEnterpriseContext;
import org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge;
import org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCEntityBridge;
import org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCFieldBridge;
/**
* This command establishes relationships for CMR fields that have
* foreign keys mapped to primary keys.
*
* @author <a href="mailto:aloubyansky@hotmail.com">Alex Loubyansky</a>
*
* @version $Revision: 81030 $
*/
public final class JDBCPostCreateEntityCommand
{
// Attributes ------------------------------------
private final JDBCEntityBridge entity;
private final JDBCCMRFieldBridge[] cmrWithFKMappedToCMP;
// Constructors ----------------------------------
public JDBCPostCreateEntityCommand(JDBCStoreManager manager)
{
entity = (JDBCEntityBridge) manager.getEntityBridge();
JDBCFieldBridge[] cmrFields = entity.getCMRFields();
List fkToCMPList = new ArrayList(4);
for(int i = 0; i < cmrFields.length; ++i)
{
JDBCCMRFieldBridge cmrField = (JDBCCMRFieldBridge)cmrFields[i];
JDBCCMRFieldBridge relatedCMRField = (JDBCCMRFieldBridge)cmrField.getRelatedCMRField();
if(cmrField.hasFKFieldsMappedToCMPFields()
|| relatedCMRField.hasFKFieldsMappedToCMPFields())
{
fkToCMPList.add(cmrField);
}
}
if(fkToCMPList.isEmpty())
cmrWithFKMappedToCMP = null;
else
cmrWithFKMappedToCMP = (JDBCCMRFieldBridge[])fkToCMPList
.toArray(new JDBCCMRFieldBridge[fkToCMPList.size()]);
}
// Public ----------------------------------------
public Object execute(Method m, Object[] args, EntityEnterpriseContext ctx)
{
if(cmrWithFKMappedToCMP == null)
return null;
for(int i = 0; i < cmrWithFKMappedToCMP.length; ++i)
{
JDBCCMRFieldBridge cmrField = cmrWithFKMappedToCMP[i];
JDBCCMRFieldBridge relatedCMRField = (JDBCCMRFieldBridge)cmrField.getRelatedCMRField();
if(cmrField.hasFKFieldsMappedToCMPFields())
{
Object relatedId = cmrField.getRelatedIdFromContext(ctx);
if(relatedId != null)
{
try
{
if(cmrField.isForeignKeyValid(relatedId))
{
cmrField.createRelationLinks(ctx, relatedId);
}
else
{
relatedCMRField.addRelatedPKWaitingForMyPK(relatedId, ctx.getId());
}
}
catch(Exception e)
{
// no such object
}
}
}
else if(relatedCMRField.hasFKFieldsMappedToCMPFields())
{
cmrField.addRelatedPKsWaitedForMe(ctx);
}
}
return null;
}
}