1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 /* 19 * $Id: FuncContains.java 468655 2006-10-28 07:12:06Z minchau $ 20 */ 21 package org.apache.xpath.functions; 22 23 import org.apache.xpath.XPathContext; 24 import org.apache.xpath.objects.XBoolean; 25 import org.apache.xpath.objects.XObject; 26 27 /** 28 * Execute the Contains() function. 29 * @xsl.usage advanced 30 */ 31 public class FuncContains extends Function2Args 32 { 33 static final long serialVersionUID = 5084753781887919723L; 34 35 /** 36 * Execute the function. The function must return 37 * a valid object. 38 * @param xctxt The current execution context. 39 * @return A valid XObject. 40 * 41 * @throws javax.xml.transform.TransformerException 42 */ execute(XPathContext xctxt)43 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException 44 { 45 46 String s1 = m_arg0.execute(xctxt).str(); 47 String s2 = m_arg1.execute(xctxt).str(); 48 49 // Add this check for JDK consistency for empty strings. 50 if (s1.length() == 0 && s2.length() == 0) 51 return XBoolean.S_TRUE; 52 53 int index = s1.indexOf(s2); 54 55 return (index > -1) ? XBoolean.S_TRUE : XBoolean.S_FALSE; 56 } 57 } 58