/*
 * Copyright (c) 1998-2012 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *   Free SoftwareFoundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.xml;

import org.w3c.dom.DOMException;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

import java.util.HashMap;
import java.util.Iterator;

class QNamedNodeMap<N> implements NamedNodeMap {
  HashMap<String,Node> _map;
  int _i;
  Iterator<Node> _iter;

  QNamedNodeMap(HashMap<String,Node> map)
  {
    _map = map;
  }
  
  public Node getNamedItem(String name)
  {
    return _map.get(name);
  }
  
  public Node getNamedItemNS(String namespaceURI, String localName)
  {
    return null;
  }

  public Node setNamedItem(Node arg) throws DOMException
  {
    return _map.put(arg.getNodeName(), arg);
  }
  
  public Node setNamedItemNS(Node arg)
  {
    return null;
  }

  public Node removeNamedItem(String name) throws DOMException
  {
    return _map.remove(name);
  }
  
  public Node removeNamedItemNS(String namespaceURI, String localName)
  {
    return null;
  }

  public Node item(int index)
  {
    Node value = null;

    synchronized (this) {
      if (_iter == null || index <= _i) {
        _iter = _map.values().iterator();
        _i = 0;
        value = _iter.next();
      }

      while (_i < index && _iter.hasNext()) {
        value = _iter.next();
        _i++;
      }
    }
    
    return value;
  }

  public int getLength()
  {
    return _map.size();
  }

  public Iterator getNamedItemKeys() throws DOMException
  {
    return _map.keySet().iterator();
  }
}
