code: /*
   * 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.
   */
  /*
   * $Id$
   */
  package org.apache.xml.serializer.utils;
  
  import org.w3c.dom.Attr;
  import org.w3c.dom.NamedNodeMap;
  import org.w3c.dom.Node;
  
  import org.xml.sax.Attributes;
  
  /**
   * Wraps a DOM attribute list in a SAX Attributes.
   * 
   * This class is a copy of the one in org.apache.xml.utils. 
   * It exists to cut the serializers dependancy on that package.
   * A minor changes from that package are:
   * DOMHelper reference changed to DOM2Helper, class is not "public"
   *  
   * This class is not a public API, it is only public because it is 
   * used in org.apache.xml.serializer.
   * 
   * @xsl.usage internal
   */
  public final class AttList implements Attributes
  {
  
    /** List of attribute nodes          */
    NamedNodeMap m_attrs;
  
    /** Index of last attribute node          */
    int m_lastIndex;
  
    // ARGHH!!  JAXP Uses Xerces without setting the namespace processing to ON!
    // DOM2Helper m_dh = new DOM2Helper();
  
    /** Local reference to DOMHelper          */
    DOM2Helper m_dh;
  
  //  /**
  //   * Constructor AttList
  //   *
  //   *
  //   * @param attrs List of attributes this will contain
  //   */
  //  public AttList(NamedNodeMap attrs)
  //  {
  //
  //    m_attrs = attrs;
  //    m_lastIndex = m_attrs.getLength() - 1;
  //    m_dh = new DOM2Helper();
  //  }
  
    /**
     * Constructor AttList
     *
     *
     * @param attrs List of attributes this will contain
     * @param dh DOMHelper 
     */
    public AttList(NamedNodeMap attrs, DOM2Helper dh)
    {
      
      m_attrs = attrs;
      m_lastIndex = m_attrs.getLength() - 1;
      m_dh = dh;
    }
  
    /**
     * Get the number of attribute nodes in the list 
     *
     *
     * @return number of attribute nodes
     */
    public int getLength()
    {
      return m_attrs.getLength();
    }
  
    /**
     * Look up an attribute's Namespace URI by index.
     *
     * @param index The attribute index (zero-based).
     * @return The Namespace URI, or the empty string if none
     *         is available, or null if the index is out of
     *         range.
     */
    public String getURI(int index)
    {
      String ns = m_dh.getNamespaceOfNode(((Attr) m_attrs.item(index)));
      if(null == ns)
        ns = "";
      return ns;
    }
  
    /**
     * Look up an attribute's local name by index.
     *
     * @param index The attribute index (zero-based).
     * @return The local name, or the empty string if Namespace
     *         processing is not being performed, or null
     *         if the index is out of range.
     */
    public String getLocalName(int index)
    {
      return m_dh.getLocalNameOfNode(((Attr) m_attrs.item(index)));
    }
  
    /**
     * Look up an attribute's qualified name by index.
     *
     *
     * @param i The attribute index (zero-based).
     *
     * @return The attribute's qualified name
     */
    public String getQName(int i)
    {
      return ((Attr) m_attrs.item(i)).getName();
    }
  
    /**
     * Get the attribute's node type by index
     *
     *
     * @param i The attribute index (zero-based)
     *
     * @return the attribute's node type
     */
    public String getType(int i)
    {
      return "CDATA";  // for the moment
    }
  
    /**
     * Get the attribute's node value by index
     *
     *
     * @param i The attribute index (zero-based)
     *
     * @return the attribute's node value
     */
    public String getValue(int i)
    {
      return ((Attr) m_attrs.item(i)).getValue();
    }
  
    /**
     * Get the attribute's node type by name
     *
     *
     * @param name Attribute name
     *
     * @return the attribute's node type
     */
    public String getType(String name)
    {
      return "CDATA";  // for the moment
    }
  
    /**
     * Look up an attribute's type by Namespace name.
     *
     * @param uri The Namespace URI, or the empty String if the
     *        name has no Namespace URI.
     * @param localName The local name of the attribute.
     * @return The attribute type as a string, or null if the
     *         attribute is not in the list or if Namespace
     *         processing is not being performed.
     */
    public String getType(String uri, String localName)
    {
      return "CDATA";  // for the moment
    }
  
    /**
     * Look up an attribute's value by name.
     *
     *
     * @param name The attribute node's name
     *
     * @return The attribute node's value
     */
    public String getValue(String name)
    {
      Attr attr = ((Attr) m_attrs.getNamedItem(name));
      return (null != attr) 
            ? attr.getValue() : null;
    }
  
    /**
     * Look up an attribute's value by Namespace name.
     *
     * @param uri The Namespace URI, or the empty String if the
     *        name has no Namespace URI.
     * @param localName The local name of the attribute.
     * @return The attribute value as a string, or null if the
     *         attribute is not in the list.
     */
    public String getValue(String uri, String localName)
    {
          Node a=m_attrs.getNamedItemNS(uri,localName);
          return (a==null) ? null : a.getNodeValue();
    }
  
    /**
     * Look up the index of an attribute by Namespace name.
     *
     * @param uri The Namespace URI, or the empty string if
     *        the name has no Namespace URI.
     * @param localPart The attribute's local name.
     * @return The index of the attribute, or -1 if it does not
     *         appear in the list.
     */
    public int getIndex(String uri, String localPart)
    {
      for(int i=m_attrs.getLength()-1;i>=0;--i)
      {
        Node a=m_attrs.item(i);
        String u=a.getNamespaceURI();
        if( (u==null ? uri==null : u.equals(uri))
        &&
        a.getLocalName().equals(localPart) )
      return i;
      }
      return -1;
    }
  
    /**
     * Look up the index of an attribute by raw XML 1.0 name.
     *
     * @param qName The qualified (prefixed) name.
     * @return The index of the attribute, or -1 if it does not
     *         appear in the list.
     */
    public int getIndex(String qName)
    {
      for(int i=m_attrs.getLength()-1;i>=0;--i)
      {
        Node a=m_attrs.item(i);
        if(a.getNodeName().equals(qName) )
      return i;
      }
      return -1;
    }
  }
  
  