1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /* 6 * Licensed to the Apache Software Foundation (ASF) under one or more 7 * contributor license agreements. See the NOTICE file distributed with 8 * this work for additional information regarding copyright ownership. 9 * The ASF licenses this file to You under the Apache License, Version 2.0 10 * (the "License"); you may not use this file except in compliance with 11 * the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 */ 21 22 package com.sun.org.apache.xpath.internal.functions; 23 24 import com.sun.org.apache.xml.internal.dtm.DTMIterator; 25 import com.sun.org.apache.xpath.internal.XPathContext; 26 import com.sun.org.apache.xpath.internal.objects.XNumber; 27 import com.sun.org.apache.xpath.internal.objects.XObject; 28 29 /** 30 * Execute the Count() function. 31 * @xsl.usage advanced 32 */ 33 public class FuncCount extends FunctionOneArg 34 { 35 static final long serialVersionUID = -7116225100474153751L; 36 37 /** 38 * Execute the function. The function must return 39 * a valid object. 40 * @param xctxt The current execution context. 41 * @return A valid XObject. 42 * 43 * @throws javax.xml.transform.TransformerException 44 */ execute(XPathContext xctxt)45 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException 46 { 47 48 // DTMIterator nl = m_arg0.asIterator(xctxt, xctxt.getCurrentNode()); 49 50 // // We should probably make a function on the iterator for this, 51 // // as a given implementation could optimize. 52 // int i = 0; 53 // 54 // while (DTM.NULL != nl.nextNode()) 55 // { 56 // i++; 57 // } 58 // nl.detach(); 59 DTMIterator nl = m_arg0.asIterator(xctxt, xctxt.getCurrentNode()); 60 int i = nl.getLength(); 61 nl.detach(); 62 63 return new XNumber((double) i); 64 } 65 } 66