code: /**
   * 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 javax.xml.namespace.QName;
  
  import org.w3c.dom.Element;
  
  import org.apache.cxf.Bus;
  import org.apache.cxf.helpers.DOMUtils;
  import org.apache.cxf.ws.policy.PolicyBuilder;
  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.AlgorithmSuite;
  import org.apache.cxf.ws.security.policy.model.Layout;
  import org.apache.cxf.ws.security.policy.model.SupportingToken;
  import org.apache.cxf.ws.security.policy.model.TransportBinding;
  import org.apache.cxf.ws.security.policy.model.TransportToken;
  import org.apache.neethi.Assertion;
  import org.apache.neethi.AssertionBuilderFactory;
  import org.apache.neethi.Constants;
  import org.apache.neethi.builders.AssertionBuilder;
  
  public class TransportBindingBuilder implements AssertionBuilder<Element> {
      
      PolicyBuilder builder;
      Bus bus;
      public TransportBindingBuilder(PolicyBuilder b, Bus bus) {
          builder = b;
          this.bus = bus;
      }
      
      public Assertion build(Element element, AssertionBuilderFactory factory)
          throws IllegalArgumentException {
          
          SPConstants consts = SP11Constants.SP_NS.equals(element.getNamespaceURI())
              ? SP11Constants.INSTANCE : SP12Constants.INSTANCE;
  
          TransportBinding transportBinding = new TransportBinding(consts, builder);
          processAlternative(element, transportBinding, consts, factory);
  
          return transportBinding;
      }
  
      public QName[] getKnownElements() {
          return new QName[]{SP11Constants.TRANSPORT_BINDING, SP12Constants.TRANSPORT_BINDING};
      }
  
      private void processAlternative(Element element, 
                                      TransportBinding parent,
                                      SPConstants consts,
                                      AssertionBuilderFactory factory) {
          Element polEl = DOMUtils.getFirstElement(element);
          boolean foundTransportToken = false;
          boolean foundAlgorithmSuite = false;
          while (polEl != null) {
              if (Constants.isPolicyElement(new QName(polEl.getNamespaceURI(),
                                                         polEl.getLocalName()))) {
                  Element child = DOMUtils.getFirstElement(polEl);
                  while (child != null) {
                      String name = child.getLocalName();
                      if (name.equals(SPConstants.ALGO_SUITE)) {
                          foundAlgorithmSuite = true;
                          parent.setAlgorithmSuite((AlgorithmSuite)new AlgorithmSuiteBuilder(bus)
                              .build(child, factory));
                      } else if (name.equals(SPConstants.TRANSPORT_TOKEN)) {
                          foundTransportToken = true;
                          parent.setTransportToken((TransportToken)new TransportTokenBuilder(builder)
                                                          .build(child, factory));
                      } else if (name.equals(SPConstants.INCLUDE_TIMESTAMP)) {
                          parent.setIncludeTimestamp(true);
                      } else if (name.equals(SPConstants.LAYOUT)) {
                          parent.setLayout((Layout)new LayoutBuilder().build(child, factory));
                      } else if (name.equals(SPConstants.SIGNED_SUPPORTING_TOKENS)
                          || name.equals(SPConstants.SIGNED_ENDORSING_SUPPORTING_TOKENS)) {
                          
                          if (consts.getVersion() == SPConstants.Version.SP_V11) {
                              parent.setSignedSupportingToken((SupportingToken)
                                                              new SupportingTokensBuilder(builder)
                                                              .build(child, factory));
                          } else {
                              parent.setSignedSupportingToken((SupportingToken)
                                                              new SupportingTokens12Builder(builder)
                                                                  .build(child, factory));
                          }
                      }
                      child = DOMUtils.getNextElement(child);
                  }
              }
              polEl = DOMUtils.getNextElement(polEl);
          }
          
          if (!foundTransportToken && consts != SP11Constants.INSTANCE) {
              throw new IllegalArgumentException(
                  "sp:TransportBinding/wsp:Policy/sp:TransportToken must have a value"
              );
          }
          if (!foundAlgorithmSuite && consts != SP11Constants.INSTANCE) {
              throw new IllegalArgumentException(
                  "sp:TransportBinding/wsp:Policy/sp:AlgorithmSuite must have a value"
              );
          }
          
      }
  
  }
  