http://xml.apache.org/xalan-j/: Serializer to write out XML, HTML etc. as a stream of characters from an input DOM or from input SAX events. (The Apache Software Foundation) 
/*
 * 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: DTMNamedNodeMap.java 1225427 2011-12-29 04:33:32Z mrglavas $
 */
package org.apache.xml.dtm.ref;

import org.apache.xml.dtm.DTM;

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


DTMNamedNodeMap is a quickie (as opposed to quick) implementation of the DOM's
NamedNodeMap interface, intended to support DTMProxy's getAttributes()
call.


 ***** Note: this does _not_ current attempt to cache any of the data;
if you ask for attribute 27 and then 28, you'll have to rescan the first
27. It should probably at least keep track of the last one retrieved,
and possibly buffer the whole array.


 ***** Also note that there's no fastpath for the by-name query; we search
linearly until we find it or fail to find it. Again, that could be
optimized at some cost in object creation/storage.

@xsl.usageinternal
/**
 * DTMNamedNodeMap is a quickie (as opposed to quick) implementation of the DOM's
 * NamedNodeMap interface, intended to support DTMProxy's getAttributes()
 * call.
 * <p>
 * ***** Note: this does _not_ current attempt to cache any of the data;
 * if you ask for attribute 27 and then 28, you'll have to rescan the first
 * 27. It should probably at least keep track of the last one retrieved,
 * and possibly buffer the whole array.
 * <p>
 * ***** Also note that there's no fastpath for the by-name query; we search
 * linearly until we find it or fail to find it. Again, that could be
 * optimized at some cost in object creation/storage.
 * @xsl.usage internal
 */
public class DTMNamedNodeMap implements NamedNodeMap
{

  
The DTM for this node. 
/** The DTM for this node. */
  DTM dtm;

  
The DTM element handle. 
/** The DTM element handle. */
  int element;

  
The number of nodes in this map. 
/** The number of nodes in this map. */
  short m_count = -1;

  
Create a getAttributes NamedNodeMap for a given DTM element node

Params:
  • dtm – The DTM Reference, must be non-null.
  • element – The DTM element handle.
/**
   * Create a getAttributes NamedNodeMap for a given DTM element node
   *
   * @param dtm The DTM Reference, must be non-null.
   * @param element The DTM element handle.
   */
  public DTMNamedNodeMap(DTM dtm, int element)
  {
    this.dtm = dtm;
    this.element = element;
  }

  
Return the number of Attributes on this Element

Returns:The number of nodes in this map.
/**
   * Return the number of Attributes on this Element
   *
   * @return The number of nodes in this map.
   */
  public int getLength()
  {

    if (m_count == -1)
    {
      short count = 0;

      for (int n = dtm.getFirstAttribute(element); n != -1;
              n = dtm.getNextAttribute(n))
      {
        ++count;
      }

      m_count = count;
    }

    return (int) m_count;
  }

  
Retrieves a node specified by name.

Params:
  • name – The nodeName of a node to retrieve.
Returns:A Node (of any type) with the specified
  nodeName, or null if it does not identify
  any node in this map.
/**
   * Retrieves a node specified by name.
   * @param name The <code>nodeName</code> of a node to retrieve.
   * @return A <code>Node</code> (of any type) with the specified
   *   <code>nodeName</code>, or <code>null</code> if it does not identify
   *   any node in this map.
   */
  public Node getNamedItem(String name)
  {

    for (int n = dtm.getFirstAttribute(element); n != DTM.NULL;
            n = dtm.getNextAttribute(n))
    {
      if (dtm.getNodeName(n).equals(name))
        return dtm.getNode(n);
    }

    return null;
  }

  
Returns the indexth item in the map. If index
is greater than or equal to the number of nodes in this map, this
returns null.

Params:
  • i – The index of the requested item.
Returns:The node at the indexth position in the map, or
  null if that is not a valid index.
/**
   * Returns the <code>index</code>th item in the map. If <code>index</code>
   * is greater than or equal to the number of nodes in this map, this
   * returns <code>null</code>.
   * @param i The index of the requested item.
   * @return The node at the <code>index</code>th position in the map, or
   *   <code>null</code> if that is not a valid index.
   */
  public Node item(int i)
  {

    int count = 0;

    for (int n = dtm.getFirstAttribute(element); n != -1;
            n = dtm.getNextAttribute(n))
    {
      if (count == i)
        return dtm.getNode(n);
      else
        ++count;
    }

    return null;
  }

  
Adds a node using its nodeName attribute. If a node with
that name is already present in this map, it is replaced by the new
one.

As the nodeName attribute is used to derive the name
which the node must be stored under, multiple nodes of certain types
(those that have a "special" string value) cannot be stored as the
names would clash. This is seen as preferable to allowing nodes to be
aliased.

Params:
  • newNode – node to store in this map. The node will later be
  accessible using the value of its nodeName attribute.
Throws:
  • DOMException – 
  WRONG_DOCUMENT_ERR: Raised if arg was created from a
  different document than the one that created this map.
  
    NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
  
    INUSE_ATTRIBUTE_ERR: Raised if arg is an
  Attr that is already an attribute of another
  Element object. The DOM user must explicitly clone
  Attr nodes to re-use them in other elements.
Returns:If the new Node replaces an existing node the
  replaced Node is returned, otherwise null
  is returned.
/**
   * Adds a node using its <code>nodeName</code> attribute. If a node with
   * that name is already present in this map, it is replaced by the new
   * one.
   * <br>As the <code>nodeName</code> attribute is used to derive the name
   * which the node must be stored under, multiple nodes of certain types
   * (those that have a "special" string value) cannot be stored as the
   * names would clash. This is seen as preferable to allowing nodes to be
   * aliased.
   * @param newNode node to store in this map. The node will later be
   *   accessible using the value of its <code>nodeName</code> attribute.
   *
   * @return If the new <code>Node</code> replaces an existing node the
   *   replaced <code>Node</code> is returned, otherwise <code>null</code>
   *   is returned.
   * @exception DOMException
   *   WRONG_DOCUMENT_ERR: Raised if <code>arg</code> was created from a
   *   different document than the one that created this map.
   *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
   *   <br>INUSE_ATTRIBUTE_ERR: Raised if <code>arg</code> is an
   *   <code>Attr</code> that is already an attribute of another
   *   <code>Element</code> object. The DOM user must explicitly clone
   *   <code>Attr</code> nodes to re-use them in other elements.
   */
  public Node setNamedItem(Node newNode)
  {
    throw new DTMException(DTMException.NO_MODIFICATION_ALLOWED_ERR);
  }

  
Removes a node specified by name. When this map contains the attributes
attached to an element, if the removed attribute is known to have a
default value, an attribute immediately appears containing the
default value as well as the corresponding namespace URI, local name,
and prefix when applicable.

Params:
  • name – The nodeName of the node to remove.
Throws:
  • DOMException – 
  NOT_FOUND_ERR: Raised if there is no node named name in
  this map.
  
    NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
Returns:The node removed from this map if a node with such a name
  exists.
/**
   * Removes a node specified by name. When this map contains the attributes
   * attached to an element, if the removed attribute is known to have a
   * default value, an attribute immediately appears containing the
   * default value as well as the corresponding namespace URI, local name,
   * and prefix when applicable.
   * @param name The <code>nodeName</code> of the node to remove.
   *
   * @return The node removed from this map if a node with such a name
   *   exists.
   * @exception DOMException
   *   NOT_FOUND_ERR: Raised if there is no node named <code>name</code> in
   *   this map.
   *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
   */
  public Node removeNamedItem(String name)
  {
    throw new DTMException(DTMException.NO_MODIFICATION_ALLOWED_ERR);
  }

  
Retrieves a node specified by local name and namespace URI. HTML-only
DOM implementations do not need to implement this method.

Params:
  • namespaceURI – The namespace URI of the node to retrieve.
  • localName – The local name of the node to retrieve.
Returns:A Node (of any type) with the specified local
  name and namespace URI, or null if they do not
  identify any node in this map.
Since:DOM Level 2
/**
   * Retrieves a node specified by local name and namespace URI. HTML-only
   * DOM implementations do not need to implement this method.
   * @param namespaceURI The namespace URI of the node to retrieve.
   * @param localName The local name of the node to retrieve.
   *
   * @return A <code>Node</code> (of any type) with the specified local
   *   name and namespace URI, or <code>null</code> if they do not
   *   identify any node in this map.
   * @since DOM Level 2
   */
  public Node getNamedItemNS(String namespaceURI, String localName)
  {
       Node retNode = null;
       for (int n = dtm.getFirstAttribute(element); n != DTM.NULL;
                       n = dtm.getNextAttribute(n))
       {
         if (localName.equals(dtm.getLocalName(n)))
         {
           String nsURI = dtm.getNamespaceURI(n); 
           if ((namespaceURI == null && nsURI == null)
                  || (namespaceURI != null && namespaceURI.equals(nsURI)))
           {
             retNode = dtm.getNode(n);
             break;
           }
         }
       }
       return retNode;
  }

  
Adds a node using its namespaceURI and
localName. If a node with that namespace URI and that
local name is already present in this map, it is replaced by the new
one.

HTML-only DOM implementations do not need to implement this method.

Params:
  • arg – A node to store in this map. The node will later be
  accessible using the value of its namespaceURI and
  localName attributes.
Throws:
  • DOMException – 
  WRONG_DOCUMENT_ERR: Raised if arg was created from a
  different document than the one that created this map.
  
    NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
  
    INUSE_ATTRIBUTE_ERR: Raised if arg is an
  Attr that is already an attribute of another
  Element object. The DOM user must explicitly clone
  Attr nodes to re-use them in other elements.
Returns:If the new Node replaces an existing node the
  replaced Node is returned, otherwise null
  is returned.
Since:DOM Level 2
/**
   * Adds a node using its <code>namespaceURI</code> and
   * <code>localName</code>. If a node with that namespace URI and that
   * local name is already present in this map, it is replaced by the new
   * one.
   * <br>HTML-only DOM implementations do not need to implement this method.
   * @param arg A node to store in this map. The node will later be
   *   accessible using the value of its <code>namespaceURI</code> and
   *   <code>localName</code> attributes.
   *
   * @return If the new <code>Node</code> replaces an existing node the
   *   replaced <code>Node</code> is returned, otherwise <code>null</code>
   *   is returned.
   * @exception DOMException
   *   WRONG_DOCUMENT_ERR: Raised if <code>arg</code> was created from a
   *   different document than the one that created this map.
   *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
   *   <br>INUSE_ATTRIBUTE_ERR: Raised if <code>arg</code> is an
   *   <code>Attr</code> that is already an attribute of another
   *   <code>Element</code> object. The DOM user must explicitly clone
   *   <code>Attr</code> nodes to re-use them in other elements.
   * @since DOM Level 2
   */
  public Node setNamedItemNS(Node arg) throws DOMException
  {
    throw new DTMException(DTMException.NO_MODIFICATION_ALLOWED_ERR);
  }

  
Removes a node specified by local name and namespace URI. A removed
attribute may be known to have a default value when this map contains
the attributes attached to an element, as returned by the attributes
attribute of the Node interface. If so, an attribute
immediately appears containing the default value as well as the
corresponding namespace URI, local name, and prefix when applicable.

HTML-only DOM implementations do not need to implement this method.

Params:
  • namespaceURI – The namespace URI of the node to remove.
  • localName – The local name of the node to remove.
Throws:
  • DOMException – 
  NOT_FOUND_ERR: Raised if there is no node with the specified
  namespaceURI and localName in this map.
  
    NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
Returns:The node removed from this map if a node with such a local
  name and namespace URI exists.
Since:DOM Level 2
/**
   * Removes a node specified by local name and namespace URI. A removed
   * attribute may be known to have a default value when this map contains
   * the attributes attached to an element, as returned by the attributes
   * attribute of the <code>Node</code> interface. If so, an attribute
   * immediately appears containing the default value as well as the
   * corresponding namespace URI, local name, and prefix when applicable.
   * <br>HTML-only DOM implementations do not need to implement this method.
   * 
   * @param namespaceURI The namespace URI of the node to remove.
   * @param localName The local name of the node to remove.
   *
   * @return The node removed from this map if a node with such a local
   *   name and namespace URI exists.
   * @exception DOMException
   *   NOT_FOUND_ERR: Raised if there is no node with the specified
   *   <code>namespaceURI</code> and <code>localName</code> in this map.
   *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
   * @since DOM Level 2
   */
  public Node removeNamedItemNS(String namespaceURI, String localName)
          throws DOMException
  {
    throw new DTMException(DTMException.NO_MODIFICATION_ALLOWED_ERR);
  }

  
Simple implementation of DOMException.

@xsl.usageinternal
/**
   * Simple implementation of DOMException.
   * @xsl.usage internal
   */
  public static class DTMException extends org.w3c.dom.DOMException
  {
          static final long serialVersionUID = -8290238117162437678L;
    
Constructs a DOM/DTM exception.

Params:
  • code – 
  • message – 
/**
     * Constructs a DOM/DTM exception.
     *
     * @param code
     * @param message
     */
    public DTMException(short code, String message)
    {
      super(code, message);
    }

    
Constructor DTMException

Params:
  • code – 
/**
     * Constructor DTMException
     *
     *
     * @param code
     */
    public DTMException(short code)
    {
      super(code, "");
    }
  }
}