/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.
 *
 */

/*
 *                        AT&T - PROPRIETARY
 *          THIS FILE CONTAINS PROPRIETARY INFORMATION OF
 *        AT&T AND IS NOT TO BE DISCLOSED OR USED EXCEPT IN
 *             ACCORDANCE WITH APPLICABLE AGREEMENTS.
 *
 *          Copyright (c) 2013 AT&T Knowledge Ventures
 *              Unpublished and Not for Publication
 *                     All Rights Reserved
 */
package org.apache.openaz.xacml.pdp.policy;

import org.apache.openaz.xacml.api.StatusCode;
import org.apache.openaz.xacml.pdp.eval.EvaluationContext;
import org.apache.openaz.xacml.pdp.eval.EvaluationException;

/**
 * PolicyIdReference extends {@link org.apache.openaz.xacml.pdp.policy.PolicyIdReferenceBase} for
 * {@link Policy} objects with an implementation of the <code>ensureReferencee</code> method to find a
 * <code>Policy</code>.
 */
public class PolicyIdReference extends PolicyIdReferenceBase<Policy> {

    public PolicyIdReference(PolicySet policySetParent, StatusCode statusCodeIn, String statusMessageIn) {
        super(policySetParent, statusCodeIn, statusMessageIn);
    }

    public PolicyIdReference(StatusCode statusCodeIn, String statusMessageIn) {
        super(statusCodeIn, statusMessageIn);
    }

    public PolicyIdReference(StatusCode statusCodeIn) {
        super(statusCodeIn);
    }

    public PolicyIdReference(PolicySet policySetParent) {
        super(policySetParent);
    }

    public PolicyIdReference() {
    }

    @Override
    protected Policy ensureReferencee(EvaluationContext evaluationContext) throws EvaluationException {
        if (this.getReferencee() == null) {
            PolicyFinderResult<Policy> policyFactoryResult = evaluationContext.getPolicy(this
                .getIdReferenceMatch());
            if (policyFactoryResult.getStatus() == null || policyFactoryResult.getStatus().isOk()) {
                this.setReferencee(policyFactoryResult.getPolicyDef());
            }
        }
        return this.getReferencee();
    }

}