| /* |
| * 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. |
| */ |
| /* |
| * $Id: FuncTranslate.java 468655 2006-10-28 07:12:06Z minchau $ |
| */ |
| package org.apache.xpath.functions; |
| |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.objects.XObject; |
| import org.apache.xpath.objects.XString; |
| |
| /** |
| * Execute the Translate() function. |
| * @xsl.usage advanced |
| */ |
| public class FuncTranslate extends Function3Args |
| { |
| static final long serialVersionUID = -1672834340026116482L; |
| |
| /** |
| * 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 |
| { |
| |
| String theFirstString = m_arg0.execute(xctxt).str(); |
| String theSecondString = m_arg1.execute(xctxt).str(); |
| String theThirdString = m_arg2.execute(xctxt).str(); |
| int theFirstStringLength = theFirstString.length(); |
| int theThirdStringLength = theThirdString.length(); |
| |
| // A vector to contain the new characters. We'll use it to construct |
| // the result string. |
| StringBuffer sbuffer = new StringBuffer(); |
| |
| for (int i = 0; i < theFirstStringLength; i++) |
| { |
| char theCurrentChar = theFirstString.charAt(i); |
| int theIndex = theSecondString.indexOf(theCurrentChar); |
| |
| if (theIndex < 0) |
| { |
| |
| // Didn't find the character in the second string, so it |
| // is not translated. |
| sbuffer.append(theCurrentChar); |
| } |
| else if (theIndex < theThirdStringLength) |
| { |
| |
| // OK, there's a corresponding character in the |
| // third string, so do the translation... |
| sbuffer.append(theThirdString.charAt(theIndex)); |
| } |
| else |
| { |
| |
| // There's no corresponding character in the |
| // third string, since it's shorter than the |
| // second string. In this case, the character |
| // is removed from the output string, so don't |
| // do anything. |
| } |
| } |
| |
| return new XString(sbuffer.toString()); |
| } |
| } |