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 22package com.sun.org.apache.xpath.internal.functions; 23 24import com.sun.org.apache.xpath.internal.XPathContext; 25import com.sun.org.apache.xpath.internal.objects.XObject; 26import com.sun.org.apache.xpath.internal.objects.XString; 27 28/** 29 * Execute the Translate() function. 30 * @xsl.usage advanced 31 */ 32public class FuncTranslate extends Function3Args 33{ 34 static final long serialVersionUID = -1672834340026116482L; 35 36 /** 37 * Execute the function. The function must return 38 * a valid object. 39 * @param xctxt The current execution context. 40 * @return A valid XObject. 41 * 42 * @throws javax.xml.transform.TransformerException 43 */ 44 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException 45 { 46 47 String theFirstString = m_arg0.execute(xctxt).str(); 48 String theSecondString = m_arg1.execute(xctxt).str(); 49 String theThirdString = m_arg2.execute(xctxt).str(); 50 int theFirstStringLength = theFirstString.length(); 51 int theThirdStringLength = theThirdString.length(); 52 53 // A vector to contain the new characters. We'll use it to construct 54 // the result string. 55 StringBuffer sbuffer = new StringBuffer(); 56 57 for (int i = 0; i < theFirstStringLength; i++) 58 { 59 char theCurrentChar = theFirstString.charAt(i); 60 int theIndex = theSecondString.indexOf(theCurrentChar); 61 62 if (theIndex < 0) 63 { 64 65 // Didn't find the character in the second string, so it 66 // is not translated. 67 sbuffer.append(theCurrentChar); 68 } 69 else if (theIndex < theThirdStringLength) 70 { 71 72 // OK, there's a corresponding character in the 73 // third string, so do the translation... 74 sbuffer.append(theThirdString.charAt(theIndex)); 75 } 76 else 77 { 78 79 // There's no corresponding character in the 80 // third string, since it's shorter than the 81 // second string. In this case, the character 82 // is removed from the output string, so don't 83 // do anything. 84 } 85 } 86 87 return new XString(sbuffer.toString()); 88 } 89} 90