/**
 * 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.w3c.dom.Node;

import org.apache.cxf.ws.policy.AssertionBuilder;
import org.apache.cxf.ws.policy.PolicyAssertion;
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.Header;
import org.apache.cxf.ws.security.policy.model.SignedEncryptedParts;


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

        SignedEncryptedParts signedEncryptedParts = new SignedEncryptedParts(true, consts);


        Node nd = element.getFirstChild();
        while (nd != null) {
            if (nd instanceof Element) {
                processElement((Element)nd, signedEncryptedParts);                
            }
            nd = nd.getNextSibling();
        }
        
        return signedEncryptedParts;
    }


    private void processElement(Element element, SignedEncryptedParts parent) {

        if ("Header".equals(element.getLocalName())) {
            Header header = new Header();

            String nameAttribute = element.getAttribute(SPConstants.NAME);
            if (nameAttribute != null) {
                header.setName(nameAttribute);
            }

            String namespaceAttribute = element.getAttribute(SPConstants.NAMESPACE);
            header.setNamespace(namespaceAttribute);

            parent.addHeader(header);

        } else if ("Body".equals(element.getLocalName())) {
            parent.setBody(true);
        }
    }


    public PolicyAssertion buildCompatible(PolicyAssertion a, PolicyAssertion b) {
        // TODO Auto-generated method stub
        return null;
    }

}
