/*
 * 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.usageadvanced
/** * 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.
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 { 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()); } }