garyp       00/10/17 10:06:43

  Added:       java/src/org/apache/xalan/lib Extensions.java
  Log:
  Implement nodeset extension function.
  
  Revision  Changes    Path
  1.1                  xml-xalan/java/src/org/apache/xalan/lib/Extensions.java
  
  Index: Extensions.java
  ===================================================================
  /*
   * The Apache Software License, Version 1.1
   *
   *
   * Copyright (c) 2000 The Apache Software Foundation.  All rights 
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer. 
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution,
   *    if any, must include the following acknowledgment:  
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowledgment may appear in the software itself,
   *    if and wherever such third-party acknowledgments normally appear.
   *
   * 4. The names "Xalan" and "Apache Software Foundation" must
   *    not be used to endorse or promote products derived from this
   *    software without prior written permission. For written 
   *    permission, please contact [EMAIL PROTECTED]
   *
   * 5. Products derived from this software may not be called "Apache",
   *    nor may "Apache" appear in their name, without prior written
   *    permission of the Apache Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation and was
   * originally based on software copyright (c) 1999, Lotus
   * Development Corporation., http://www.lotus.com.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   */
  
  package org.apache.xalan.lib;
  
  import org.w3c.dom.Text;
  import org.w3c.dom.traversal.NodeIterator;
  import org.apache.xpath.NodeSet;
  
  import org.apache.xalan.extensions.ExpressionContext;
  
  /**
   * <meta name="usage" content="general"/>
   * This class contains many of the Xalan-supplied extensions.
   * It is accessed by specifying a namespace URI as follows:
   * <pre>
   *    xmlns:xalan="http://xml.apache.org/xalan";
   * </pre>
   */
  
  public class Extensions {
  
    private Extensions() {}     // Make sure class cannot be instantiated
  
    /**
     * This method is an extension that implements as a Xalan extension
     * the node-set function also found in xt and saxon.
     * As described in section 11.1 of XSLT 1.0 Recommendation,
     * the node-set returned contains just a single root node.  Most of the
     * actual work here is done in <code>MethodResolver</code> and
     * <code>XRTreeFrag</code>.
     */
  
    public static NodeSet nodeset(ExpressionContext myProcessor, Object rtf) {
  
      if (rtf instanceof NodeIterator)
      {
        return new NodeSet((NodeIterator) rtf);
      }
      else
      {
        Text textNode = 
myProcessor.getContextNode().getOwnerDocument().createTextNode(rtf.toString());
        return new NodeSet(textNode);
      }
    }
  
  }
  
  
  

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