/*
* 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.test.cmp2.cmrtransaction.ejb;
import java.util.Collection;
import javax.ejb.EJBException;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;
import javax.ejb.RemoveException;
import javax.ejb.EJBLocalObject;
import javax.ejb.CreateException;
import org.jboss.test.cmp2.cmrtransaction.interfaces.TreeLocal;
/**
* @author B Stansberry brian_stansberry@wanconcepts.com
*/
public abstract class TreeEntity implements EntityBean
{
// ---------------------------------------------------- Abstract Accessors
// CMP Fields
public abstract String getId();
public abstract void setId(String id);
public abstract int getSortOrder();
public abstract void setSortOrder(int sortOrder);
public abstract Collection getMenuChildren();
// CMR Fields
public abstract void setMenuChildren(Collection menuChildren);
public abstract TreeLocal getMenuParent();
public abstract void setMenuParent(TreeLocal menuParent);
// ------------------------------------------------------- Instance Fields
private EntityContext entityContext = null;
// -------------------------------------------------------- Bean Lifecycle
public TreeEntity() {}
public String ejbCreate(String name, TreeLocal parent)
throws CreateException
{
setId(name);
setSortOrder(0);
return null;
}
public void ejbPostCreate(String name, TreeLocal parent)
{
setMenuParent(parent);
}
public void ejbRemove() throws RemoveException, EJBException {}
public void ejbActivate() throws EJBException {}
public void ejbPassivate() throws EJBException {}
public void ejbLoad() throws EJBException {}
public void ejbStore() throws EJBException {}
public void setEntityContext(EntityContext entityContext) throws EJBException
{
this.entityContext = entityContext;
}
public EntityContext getEntityContext()
{
return entityContext;
}
public void unsetEntityContext() throws EJBException
{
entityContext = null;
}
// -------------------------------------------------------- Public Methods
public void setPrecededBy(TreeLocal precedingNode)
{
EJBLocalObject self = getEntityContext().getEJBLocalObject();
if (precedingNode == null)
{
setSortOrder(1);
}
else if (self.isIdentical(precedingNode))
{
System.out.println("MenuResource " + getId() + ": "
+ "attempt to set menu resource "
+ precedingNode.getId()
+ " as preceding node; cannot set a node as "
+ "its own preceding node.");
}
else if (ejbEquals(getMenuParent(), precedingNode.getMenuParent()))
{
setSortOrder(precedingNode.getSortOrder() + 1);
}
else
{
System.out.println("MenuResource " + getId() + ": "
+ "attempt to set menu resource "
+ precedingNode.getId()
+ " as preceding node; invalid as node has a "
+ "different menu parent.");
}
}
// ------------------------------------------------------- Private Methods
/**
* Generic EJBObject equality algoritm that can handle null arguments.
*
* @param a The first object to compare
* @param b The second object to compare
*
* @return <code>true</code> if both arguments are null or neither is null
* and <code>a.isIdentical(b)</code>. Otherwise, returns
* <code>false</code>
*
* @pre $none
* @post $none
*/
private boolean ejbEquals(EJBLocalObject a, EJBLocalObject b)
{
boolean result = false;
if (a == b)
{
result = true; // deals w/ null equality
}
else if ((a == null) || (b == null))
{
result = false;
}
else
{
result = a.isIdentical(b);
}
return result;
}
}