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/*
 * Licensed to the University Corporation for Advanced Internet Development, 
 * Inc. (UCAID) under one or more contributor license agreements.  See the 
 * NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The UCAID 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.
 */

package org.opensaml.soap.wssecurity.impl;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.xml.namespace.QName;

import org.opensaml.core.xml.XMLObject;
import org.opensaml.core.xml.util.AttributeMap;
import org.opensaml.core.xml.util.IndexedXMLObjectChildrenList;
import org.opensaml.soap.wssecurity.IdBearing;
import org.opensaml.soap.wssecurity.SecurityTokenReference;
import org.opensaml.soap.wssecurity.UsageBearing;

/**
 * SecurityTokenReferenceImpl.
 * 
 */
public class SecurityTokenReferenceImpl extends AbstractWSSecurityObject implements SecurityTokenReference {

    /** The <wsu:Id> attribute value. */
    private String id;

    /** List of <wsse:Usage> attribute values. */
    private List usages;
    
    /** Wildcard attributes. */
    private AttributeMap unknownAttributes;
    
    /** Wildcard child elements. */
    private IndexedXMLObjectChildrenList unknownChildren;

    /**
     * Constructor.
     * 
     * @param namespaceURI namespace of the element
     * @param elementLocalName name of the element
     * @param namespacePrefix namespace prefix of the element
     */
    public SecurityTokenReferenceImpl(String namespaceURI, String elementLocalName, String namespacePrefix) {
        super(namespaceURI, elementLocalName, namespacePrefix);
        usages = new ArrayList();
        unknownAttributes = new AttributeMap(this);
        unknownChildren = new IndexedXMLObjectChildrenList(this);
    }
    

    /** {@inheritDoc} */
    public List getWSSEUsages() {
        return usages;
    }

    /** {@inheritDoc} */
    public void setWSSEUsages(List newUsages) {
        usages = prepareForAssignment(usages, newUsages);
        manageQualifiedAttributeNamespace(UsageBearing.WSSE_USAGE_ATTR_NAME, !usages.isEmpty());
    }

    /** {@inheritDoc} */
    public String getWSUId() {
        return id;
    }

    /** {@inheritDoc} */
    public void setWSUId(String newId) {
        String oldId = id;
        id = prepareForAssignment(id, newId);
        registerOwnID(oldId, id);
        manageQualifiedAttributeNamespace(IdBearing.WSU_ID_ATTR_NAME, id != null);
    }


    /** {@inheritDoc} */
    public AttributeMap getUnknownAttributes() {
        return unknownAttributes;
    }

    /** {@inheritDoc} */
    public List getUnknownXMLObjects() {
        return unknownChildren;
    }

    /** {@inheritDoc} */
    public List getUnknownXMLObjects(QName typeOrName) {
        return (List) unknownChildren.subList(typeOrName);
    }
    
    /** {@inheritDoc} */
    public List getOrderedChildren() {
        List children = new ArrayList();

        if (!getUnknownXMLObjects().isEmpty()) {
            children.addAll(getUnknownXMLObjects());
        }
        return Collections.unmodifiableList(children);
    }

}