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/*******************************************************************************
* Copyright (c) 2001, 2004 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 java.util.ArrayList;
import java.util.List;
import org.eclipse.jst.j2ee.ejb.CommonRelationshipRole;
import org.eclipse.jst.j2ee.ejb.ContainerManagedEntity;
/**
* Insert the type's description here.
* Creation date: (10/15/2001 11:37:19 AM)
* @author: Administrator
*/
public abstract class AbstractRequiredRelationshipRoleFilter extends ContainerManagedEntityFilter {
/**
* AbstractRequiredRelationshipRoleFilter constructor comment.
*/
public AbstractRequiredRelationshipRoleFilter() {
super();
}
/**
* filter method comment.
*/
public List filter(ContainerManagedEntity cmp) {
List roles = new ArrayList();
List allRoles = getRolesToFilter(cmp);
CommonRelationshipRole role;
for (int i = 0; i < allRoles.size(); i++) {
role = (CommonRelationshipRole) allRoles.get(i);
if (shouldAddFilteredResult(role))
roles.add(role);
}
return roles;
}
protected abstract java.util.List getRolesToFilter(ContainerManagedEntity cmp) ;
/**
* Return true if the multiplicity for @aRole is required.
*/
protected boolean shouldAddFilteredResult(CommonRelationshipRole aRole) {
boolean required = aRole.isRequired();
if (required) {
CommonRelationshipRole opposite = aRole.getOppositeAsCommonRole();
if (opposite != null) {
if (opposite.isRequired() && !aRole.isKey()) {
if (opposite.isKey() || aRole.isMany())
return false;
if (!opposite.isMany())
//both are single and not key
return aRole.isForward();
}
}
}
return required;
}
}
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