src/org/apache/policy/model/PolicyReference.java

/*
 * Copyright 2001-2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.policy.model;

import org.apache.policy.util.PolicyRegistry;

/**
 * PolicyReference class has implicit reference to a external policy. It acts 
 * as wrapper to external policies in the standard policy framework.
 *
 */
public class PolicyReference implements Assertion {
	
	private String PolicyURIString = null;
	private Assertion parent = null;
		
	public PolicyReference(String policyURIString) {
		this.PolicyURIString = policyURIString;
	}
	
	public String getPolicyURIString() {
		return PolicyURIString;
	}
	
	public Assertion intersect(Assertion assertion) {
		throw new UnsupportedOperationException("intersect is not defined for "
				+ "PolicyReference");
	}
	
	public Assertion intersect(Assertion assertion, PolicyRegistry reg)
			throws UnsupportedOperationException {
		throw new UnsupportedOperationException();
	}
	
	public Assertion merge(Assertion assertion, PolicyRegistry reg)
			throws UnsupportedOperationException {
		throw new UnsupportedOperationException();
	}
	
	public Assertion merge(Assertion assertion) {
		throw new UnsupportedOperationException("merge is not supported  for " +
				"PolicyReference");
	}

	public boolean hasParent() {
		return parent != null;
	}

	public Assertion getParent() {
		return parent;
	}

	public void setParent(Assertion parent) {
		this.parent = parent;
	}
}