/**
    * 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.wss4j.policy.model;
  
  import org.apache.neethi.Assertion;
  import org.apache.neethi.Policy;
  import org.apache.wss4j.policy.SPConstants;
  
  import javax.xml.namespace.QName;
  import javax.xml.stream.XMLStreamException;
  import javax.xml.stream.XMLStreamWriter;
  import java.util.Iterator;
  import java.util.List;
  
  public class TransportBinding extends AbstractBinding {
  
      private TransportToken transportToken;
  
      public TransportBinding(SPConstants.SPVersion version, Policy nestedPolicy) {
          super(version, nestedPolicy);
  
          parseNestedPolicy(nestedPolicy, this);
      }
  
      @Override
      public QName getName() {
          return getVersion().getSPConstants().getTransportBinding();
      }
  
      @Override
      public boolean equals(Object object) {
          if (object == this) {
              return true;
          }
  
          if (!(object instanceof TransportBinding)) {
              return false;
          }
  
          TransportBinding that = (TransportBinding)object;
          if (transportToken != null && !transportToken.equals(that.transportToken)
              || transportToken == null && that.transportToken != null) {
              return false;
          }
  
          return super.equals(object);
      }
  
      @Override
      public int hashCode() {
          int result = 17;
          if (transportToken != null) {
              result = 31 * result + transportToken.hashCode();
          }
  
          return 31 * result + super.hashCode();
      }
  
      @Override
      protected AbstractSecurityAssertion cloneAssertion(Policy nestedPolicy) {
          return new TransportBinding(getVersion(), nestedPolicy);
      }
  
      protected void parseNestedPolicy(Policy nestedPolicy, TransportBinding transportBinding) {
          Iterator<List<Assertion>> alternatives = nestedPolicy.getAlternatives();
          //we just process the first alternative
          //this means that if we have a compact policy only the first alternative is visible
          //in contrary to a normalized policy where just one alternative exists
          if (alternatives.hasNext()) {
              List<Assertion> assertions = alternatives.next();
              for (Assertion assertion : assertions) {
                  String assertionName = assertion.getName().getLocalPart();
                  String assertionNamespace = assertion.getName().getNamespaceURI();
  
                  QName transportToken = getVersion().getSPConstants().getTransportToken();
                  if (transportToken.getLocalPart().equals(assertionName)
                      && transportToken.getNamespaceURI().equals(assertionNamespace)) {
                      if (transportBinding.getTransportToken() != null) {
                          throw new IllegalArgumentException(SPConstants.ERR_INVALID_POLICY);
                      }
                      transportBinding.setTransportToken((TransportToken) assertion);
                      continue;
                  }
             }
         }
     }
 
     @Override
     public void serialize(XMLStreamWriter writer) throws XMLStreamException {
         super.serialize(writer, getPolicy());
     }
 
     public TransportToken getTransportToken() {
         return transportToken;
     }
 
     protected void setTransportToken(TransportToken transportToken) {
         this.transportToken = transportToken;
     }
 }