/*
 * 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.ode.utils.xml.capture;

import java.net.URI;
import java.util.Iterator;
import java.util.Set;

import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;

/**
 * A multiplexing content handler then forwards each SAX event to an
 * arbitraty number of {@link Tracker}s.
 */
class MultiplexTracker implements ContentHandler {
  private Set<Tracker> contentHandlers_;

  /**
   * Constructor.
   * @param handlers {@link Set} of {@link Tracker}s to forward events to
   */
  MultiplexTracker(Set<Tracker> handlers) {
    contentHandlers_ = handlers;
  }

  public void characters(char ch[], int start, int length) throws SAXException {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().characters(ch, start, length);
  }

  public void endDocument() throws SAXException {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().endDocument();
  }

  public void endElement(String uri, String localName, String qName) throws SAXException {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().endElement(uri, localName, qName);
  }

  public void endPrefixMapping(String prefix) throws SAXException {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().endPrefixMapping(prefix);
  }

  public void ignorableWhitespace(char ch[], int start, int length) throws SAXException {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().ignorableWhitespace(ch, start, length);
  }

  public void processingInstruction(String target, String data) throws SAXException {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().processingInstruction(target, data);
  }

  public void setDocumentLocator(Locator locator) {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().setDocumentLocator(locator);
  }

  public void skippedEntity(String name) throws SAXException {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().skippedEntity(name);
  }

  public void startDocument() throws SAXException {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().startDocument();
  }

  public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().startElement(uri, localName, qName, atts);
  }

  public void startPrefixMapping(String prefix, String uri) throws SAXException {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().startPrefixMapping(prefix, uri);
  }

  void init(URI uri, Set<URI> references) {
    for (Iterator<Tracker> i = contentHandlers_.iterator(); i.hasNext(); )
      i.next().init(uri, references);
  }
}