/*
* 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.jdbc2;
import org.jboss.ejb.plugins.AbstractInterceptor;
import org.jboss.ejb.plugins.cmp.jdbc2.bridge.JDBCCMRFieldBridge2;
import org.jboss.ejb.plugins.cmp.jdbc.bridge.CMRInvocation;
import org.jboss.ejb.EntityContainer;
import org.jboss.ejb.Container;
import org.jboss.ejb.EntityEnterpriseContext;
import org.jboss.logging.Logger;
import org.jboss.invocation.Invocation;
import org.jboss.invocation.LocalEJBInvocation;
import javax.ejb.EJBException;
import java.io.Serializable;
import java.io.ObjectStreamException;
/**
* @author <a href="mailto:alex@jboss.org">Alexey Loubyansky</a>
* @version <tt>$Revision: 81030 $</tt>
*/
public class RelationInterceptor
extends AbstractInterceptor
{
private Logger log;
// AbstractInterceptor overrides
public void setContainer(Container container)
{
this.container = (EntityContainer)container;
if(container != null)
{
log = Logger.getLogger(
this.getClass().getName() +
"." +
container.getBeanMetaData().getEjbName());
}
}
// Interceptor implementation
public Object invoke(Invocation mi) throws Exception
{
if(!(mi instanceof CMRInvocation))
{
return getNext().invoke(mi);
}
org.jboss.ejb.plugins.cmp.jdbc.bridge.CMRMessage msg = ((CMRInvocation)mi).getCmrMessage();
// We are going to work with the context a lot
EntityEnterpriseContext ctx = (EntityEnterpriseContext)mi.getEnterpriseContext();
JDBCCMRFieldBridge2 cmrField = (JDBCCMRFieldBridge2)mi.getArguments()[0];
if(org.jboss.ejb.plugins.cmp.jdbc.bridge.CMRMessage.ADD_RELATION == msg)
{
Object relatedId = mi.getArguments()[1];
if(log.isTraceEnabled())
{
log.trace("Add relation: field=" + cmrField.getFieldName() +
" id=" + ctx.getId() +
" relatedId=" + relatedId);
}
cmrField.addRelatedId(ctx, relatedId);
}
else if(org.jboss.ejb.plugins.cmp.jdbc.bridge.CMRMessage.REMOVE_RELATION == msg)
{
// call removeRelation
Object relatedId = mi.getArguments()[1];
if(log.isTraceEnabled())
{
log.trace("Remove relation: field=" + cmrField.getFieldName() +
" id=" + ctx.getId() +
" relatedId=" + relatedId);
}
cmrField.removeRelatedId(ctx, relatedId);
}
else
{
// this should not be possible we are using a type safe enum
throw new EJBException("Unknown cmp2.0-relationship-message=" + msg);
}
return null;
}
// Inner
public static class RelationInvocation extends LocalEJBInvocation
{
public final CMRMessage msg;
public RelationInvocation(CMRMessage msg)
{
this.msg = msg;
}
}
public static final class CMRMessage implements Serializable
{
private static int nextOrdinal = 0;
private static final CMRMessage[] VALUES = new CMRMessage[5];
public static final CMRMessage ADD_RELATED_ID = new CMRMessage("ADD_RELATED_ID");
public static final CMRMessage REMOVE_RELATED_ID = new CMRMessage("REMOVE_RELATED_ID");
public static final CMRMessage DESTROY_EXISTING_RELATIONSHIPS = new CMRMessage("DESTROY_EXISTING_RELATIONSHIPS");
private final transient String name;
private final int ordinal;
private CMRMessage(String name)
{
this.name = name;
this.ordinal = nextOrdinal++;
VALUES[ordinal] = this;
}
public String toString()
{
return name;
}
Object readResolve() throws ObjectStreamException
{
return VALUES[ordinal];
}
}
}