- /*
- * Copyright 1999-2004 The Apache Software Foundation.
- *
- * Licensed 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,v 1.8 2004/02/17 04:34:00 minchau Exp $
- */
- package com.sun.org.apache.xpath.internal.functions;
-
- import com.sun.org.apache.xpath.internal.XPathContext;
- import com.sun.org.apache.xpath.internal.objects.XObject;
- import com.sun.org.apache.xpath.internal.objects.XString;
-
- /**
- * Execute the Translate() function.
- * @xsl.usage advanced
- */
- public class FuncTranslate extends Function3Args
- {
-
- /**
- * 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());
- }
- }