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.w3c.dom.Node;
  import org.w3c.dom.NodeList;
  
  import org.apache.cxf.helpers.DOMUtils;
  import org.apache.cxf.ws.policy.PolicyBuilder;
  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.KerberosToken;
  import org.apache.neethi.Assertion;
  import org.apache.neethi.AssertionBuilderFactory;
  import org.apache.neethi.builders.AssertionBuilder;
  
  
  public class KerberosTokenBuilder implements AssertionBuilder<Element> {
  
      PolicyBuilder builder;
      public KerberosTokenBuilder(PolicyBuilder b) {
          builder = b;
      }
      
      public Assertion build(Element element, AssertionBuilderFactory factory) {
          
          SPConstants consts = SP11Constants.SP_NS.equals(element.getNamespaceURI())
              ? SP11Constants.INSTANCE : SP12Constants.INSTANCE;
  
          KerberosToken kerberosToken = new KerberosToken(consts);
          kerberosToken.setOptional(PolicyConstants.isOptional(element));
          kerberosToken.setIgnorable(PolicyConstants.isIgnorable(element));
  
          String attribute = element.getAttributeNS(element.getNamespaceURI(), SPConstants.ATTR_INCLUDE_TOKEN);
          if (attribute != null) {
              kerberosToken.setInclusion(consts.getInclusionFromAttributeValue(attribute.trim()));
          }
          
          Element child = DOMUtils.getFirstElement(element);
          boolean foundPolicy = false;
          while (child != null) {
              String ln = child.getLocalName();
              if (org.apache.neethi.Constants.ELEM_POLICY.equals(ln)) {
                  foundPolicy = true;
                  NodeList policyChildren = child.getChildNodes();
                  if (policyChildren != null) {
                      for (int i = 0; i < policyChildren.getLength(); i++) {
                          Node policyChild = policyChildren.item(i);
                          if (policyChild instanceof Element) {
                              QName qname = 
                                  new QName(policyChild.getNamespaceURI(), policyChild.getLocalName());
                              String localpart = qname.getLocalPart();
                              if (SPConstants.KERBEROS_V5_AP_REQ_TOKEN_11.equals(localpart)) {
                                  kerberosToken.setV5ApReqToken11(true);
                              } else if (SPConstants.KERBEROS_GSS_V5_AP_REQ_TOKEN_11.equals(localpart)) {
                                  kerberosToken.setGssV5ApReqToken11(true);
                              } else if (SPConstants.REQUIRE_DERIVED_KEYS.equals(localpart)) {
                                  kerberosToken.setDerivedKeys(true);
                              }
                          }
                      }
                  }
              }
              child = DOMUtils.getNextElement(child);
          }
          
          if (!foundPolicy && consts != SP11Constants.INSTANCE) {
              throw new IllegalArgumentException(
                  "sp:KerberosToken/wsp:Policy must have a value"
              );
          }
          return kerberosToken;
      }
  
      public QName[] getKnownElements() {
          return new QName[]{SP11Constants.KERBEROS_TOKEN, SP12Constants.KERBEROS_TOKEN};
      }
  }
  