/*
 * 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.
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/*
 * $Id: FuncCount.java 468655 2006-10-28 07:12:06Z minchau $
 */
package org.apache.xpath.functions;

import org.apache.xml.dtm.DTMIterator;
import org.apache.xpath.XPathContext;
import org.apache.xpath.objects.XNumber;
import org.apache.xpath.objects.XObject;

Execute the Count() function.
@xsl.usageadvanced
/** * Execute the Count() function. * @xsl.usage advanced */
public class FuncCount extends FunctionOneArg { static final long serialVersionUID = -7116225100474153751L;
Execute the function. The function must return a valid object.
Params:
  • xctxt – The current execution context.
Throws:
Returns:A valid XObject.
/** * Execute the function. The function must return * a valid object. * @param xctxt The current execution context. * @return A valid XObject. * * @throws javax.xml.transform.TransformerException */
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException { // DTMIterator nl = m_arg0.asIterator(xctxt, xctxt.getCurrentNode()); // // We should probably make a function on the iterator for this, // // as a given implementation could optimize. // int i = 0; // // while (DTM.NULL != nl.nextNode()) // { // i++; // } // nl.detach(); DTMIterator nl = m_arg0.asIterator(xctxt, xctxt.getCurrentNode()); int i = nl.getLength(); nl.detach(); return new XNumber((double) i); } }