/**
    * 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.test.utils;
  
  import org.apache.xml.security.stax.ext.stax.XMLSecEvent;
  import org.apache.xml.security.stax.ext.stax.XMLSecEventFactory;
  import org.apache.xml.security.stax.ext.stax.XMLSecStartElement;
  
  import javax.xml.stream.XMLStreamConstants;
  import javax.xml.stream.XMLStreamException;
  import javax.xml.stream.XMLStreamReader;
  import javax.xml.stream.events.XMLEvent;
  import javax.xml.stream.util.XMLEventAllocator;
  import javax.xml.stream.util.XMLEventConsumer;
  
  /**
   * <p/>
   * An extended XMLEventAllocator to collect namespaces and C14N relevant attributes
   */
  public class XMLSecEventAllocator implements XMLEventAllocator {
  
      private XMLSecStartElement parentXmlSecStartElement;
  
      @Override
      public XMLEventAllocator newInstance() {
          try {
              return new XMLSecEventAllocator();
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
      }
  
      @Override
      public XMLEvent allocate(XMLStreamReader xmlStreamReader) throws XMLStreamException {
          XMLSecEvent xmlSecEvent = XMLSecEventFactory.allocate(xmlStreamReader, parentXmlSecStartElement);
          switch (xmlSecEvent.getEventType()) {
              case XMLStreamConstants.START_ELEMENT:
                  parentXmlSecStartElement = (XMLSecStartElement) xmlSecEvent;
                  break;
              case XMLStreamConstants.END_ELEMENT:
                  if (parentXmlSecStartElement != null) {
                      parentXmlSecStartElement = parentXmlSecStartElement.getParentXMLSecStartElement();
                  }
                  break;
          }
          return xmlSecEvent;
      }
  
      @Override
      public void allocate(XMLStreamReader reader, XMLEventConsumer consumer) throws XMLStreamException {
          //xmlEventAllocator.allocate(reader, consumer);
      }
  }