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/**
 * 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.
 */
package org.apache.cxf.ws.security.policy.builders;


import java.util.Arrays;
import java.util.List;

import javax.xml.namespace.QName;

import org.w3c.dom.Element;

import org.apache.cxf.helpers.DOMUtils;
import org.apache.cxf.ws.policy.AssertionBuilder;
import org.apache.cxf.ws.policy.PolicyAssertion;
import org.apache.cxf.ws.policy.PolicyConstants;
import org.apache.cxf.ws.security.policy.SP11Constants;
import org.apache.cxf.ws.security.policy.SP12Constants;
import org.apache.cxf.ws.security.policy.SPConstants;
import org.apache.cxf.ws.security.policy.model.Layout;

public class LayoutBuilder implements AssertionBuilder {
    private static final List KNOWN_ELEMENTS 
        = Arrays.asList(SP11Constants.LAYOUT, SP12Constants.LAYOUT);
    
    public LayoutBuilder() {
    }
    public List getKnownElements() {
        return KNOWN_ELEMENTS;
    }
    
    
    public PolicyAssertion build(Element element)
        throws IllegalArgumentException {
        
        SPConstants consts = SP11Constants.SP_NS.equals(element.getNamespaceURI())
            ? SP11Constants.INSTANCE : SP12Constants.INSTANCE;

        
        Layout layout = new Layout(consts);
        processAlternative(element, layout, consts);
        return layout;
    }

    public void processAlternative(Element element, Layout parent, SPConstants consts) {
        Element polEl = PolicyConstants.findPolicyElement(element);
        if (polEl != null) {
            Element child = DOMUtils.getFirstElement(polEl);
            if (child != null) {
                parent.setValue(SPConstants.Layout.valueOf(child.getLocalName()));
            }
        }
    }
    public PolicyAssertion buildCompatible(PolicyAssertion a, PolicyAssertion b) {
        // TODO Auto-generated method stub
        return null;
    }
}