/**
    * 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.stax.impl.processor.input;
  
  import java.util.List;
  
  import javax.xml.namespace.QName;
  import javax.xml.stream.XMLStreamConstants;
  import javax.xml.stream.XMLStreamException;
  
  import org.apache.wss4j.stax.ext.WSSConstants;
  import org.apache.wss4j.stax.securityEvent.OperationSecurityEvent;
  import org.apache.wss4j.stax.utils.WSSUtils;
  import org.apache.xml.security.exceptions.XMLSecurityException;
  import org.apache.xml.security.stax.ext.AbstractInputProcessor;
  import org.apache.xml.security.stax.ext.InputProcessorChain;
  import org.apache.xml.security.stax.ext.XMLSecurityProperties;
  import org.apache.xml.security.stax.ext.stax.XMLSecEvent;
  import org.apache.xml.security.stax.ext.stax.XMLSecStartElement;
  import org.apache.xml.security.stax.impl.util.IDGenerator;
  
  /**
   * Processor which emits the Operation-Security-Event
   */
  public class OperationInputProcessor extends AbstractInputProcessor {
  
      public OperationInputProcessor(XMLSecurityProperties securityProperties) {
          super(securityProperties);
          this.setPhase(WSSConstants.Phase.POSTPROCESSING);
          this.addBeforeProcessor(SecurityHeaderInputProcessor.class.getName());
      }
  
      @Override
      public XMLSecEvent processHeaderEvent(InputProcessorChain inputProcessorChain)
              throws XMLStreamException, XMLSecurityException {
          return inputProcessorChain.processHeaderEvent();
      }
  
      @Override
      public XMLSecEvent processEvent(InputProcessorChain inputProcessorChain)
              throws XMLStreamException, XMLSecurityException {
          XMLSecEvent xmlSecEvent = inputProcessorChain.processEvent();
          if (xmlSecEvent.getEventType() == XMLStreamConstants.START_ELEMENT) {
              XMLSecStartElement xmlSecStartElement = xmlSecEvent.asStartElement();
              List<QName> elementPath = xmlSecStartElement.getElementPath();
              if (elementPath.size() == 3 && WSSUtils.isInSOAPBody(elementPath)) {
                  OperationSecurityEvent operationSecurityEvent = new OperationSecurityEvent();
                  operationSecurityEvent.setOperation(xmlSecEvent.asStartElement().getName());
                  operationSecurityEvent.setCorrelationID(IDGenerator.generateID(null));
                  inputProcessorChain.getSecurityContext().registerSecurityEvent(operationSecurityEvent);
                  inputProcessorChain.removeProcessor(this);
              }
          }
          return xmlSecEvent;
      }
  }