1. /*

  2.  * Copyright 1999-2004 The Apache Software Foundation.

  3.  *

  4.  * Licensed under the Apache License, Version 2.0 (the "License");

  5.  * you may not use this file except in compliance with the License.

  6.  * You may obtain a copy of the License at

  7.  *

  8.  *     http://www.apache.org/licenses/LICENSE-2.0

  9.  *

  10.  * Unless required by applicable law or agreed to in writing, software

  11.  * distributed under the License is distributed on an "AS IS" BASIS,

  12.  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  13.  * See the License for the specific language governing permissions and

  14.  * limitations under the License.

  15.  */

  16. /*

  17.  * $Id: FuncCount.java,v 1.10 2004/02/17 04:34:00 minchau Exp $

  18.  */

  19. package com.sun.org.apache.xpath.internal.functions;

  20. 

  21. import com.sun.org.apache.xml.internal.dtm.DTMIterator;

  22. import com.sun.org.apache.xpath.internal.XPathContext;

  23. import com.sun.org.apache.xpath.internal.objects.XNumber;

  24. import com.sun.org.apache.xpath.internal.objects.XObject;

  25. 

  26. /**

  27.  * Execute the Count() function.

  28.  * @xsl.usage advanced

  29.  */

  30. public class FuncCount extends FunctionOneArg

  31. {

  32. 

  33.   /**

  34.    * Execute the function.  The function must return

  35.    * a valid object.

  36.    * @param xctxt The current execution context.

  37.    * @return A valid XObject.

  38.    *

  39.    * @throws javax.xml.transform.TransformerException

  40.    */

  41.   public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException

  42.   {

  43. 

  44. //    DTMIterator nl = m_arg0.asIterator(xctxt, xctxt.getCurrentNode());

  45. 

  46. //    // We should probably make a function on the iterator for this, 

  47. //    // as a given implementation could optimize.

  48. //    int i = 0;

  49. //

  50. //    while (DTM.NULL != nl.nextNode())

  51. //    {

  52. //      i++;

  53. //    }

  54. //    nl.detach();

  55. 	DTMIterator nl = m_arg0.asIterator(xctxt, xctxt.getCurrentNode());

  56. 	int i = nl.getLength();	

  57. 	nl.detach();

  58. 

  59.     return new XNumber((double) i);

  60.   }

  61. }