/*******************************************************************************
* Copyright (c) 2001, 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.j2ee.ejb.internal.impl;
import org.eclipse.jst.j2ee.ejb.CMPAttribute;
import org.eclipse.jst.j2ee.ejb.ContainerManagedEntity;
/**
* This filter will return a subset of the persistentAttributes from the
* ContainerManagedEntityExtension that is passed as an argument to the filter
* method. It will remove any inherited persistentAttributes and any
* persistentAttributes that are held by EjbRelationshipRole objects (including
* inherited EjbRelationshipRole attributes). That means the returned list of
* CMPAttributes will be attributes that were defined locally minus all
* inherited attributes and minus any attributes pointed to by
* EjbRelationshipRoles, thus the attributes will only be attributes that were
* defined locally by the user. Creation date: (11/28/2000 7:31:42 PM) @author:
* Administrator
*/
public class LocalModelledPersistentAttributeFilter extends SupertypeCMPAttributeFilter {
private static LocalModelledPersistentAttributeFilter singleton;
/**
* Return the proper list of attributes from cmpExt. Return local
* attributes minus those added due to Relationship Roles.
*/
@Override
protected java.util.List getSourceAttributes(ContainerManagedEntity cmp) {
java.util.List local = null, localRoleAttributes;
local = cmp.getFilteredFeatures(LocalPersistentAttributeFilter.singleton());
localRoleAttributes = cmp.getFilteredFeatures(LocalRelationshipRoleAttributeFilter.singleton());
if(local != null)
local.removeAll(localRoleAttributes);
return local;
}
/**
* Return a boolean indicating whether anAttribute also exists in the
* superEntity. For this filter, only the name has to be the same.
*/
@Override
protected boolean isSupertypeAttribute(ContainerManagedEntity superEntity, CMPAttribute anAttribute) {
CMPAttribute found = superEntity.getPersistentAttribute(anAttribute.getName());
return found != null;
}
/**
* Insert the method's description here. Creation date: (11/28/2000 5:36:00
* PM)
*
* @return com.ibm.ejs.models.base.extensions.ejbext.impl.LocalModelledPersistentAttributeFilter
*/
public static LocalModelledPersistentAttributeFilter singleton() {
if (singleton == null)
singleton = new LocalModelledPersistentAttributeFilter();
return singleton;
}
}