| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "The Jakarta Project", "Ant", and "Apache Software |
| * Foundation" must not be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| package org.apache.tools.ant.util; |
| |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.util.regexp.RegexpMatcher; |
| import org.apache.tools.ant.util.regexp.RegexpMatcherFactory; |
| |
| |
| import java.util.Vector; |
| |
| /** |
| * Implementation of FileNameMapper that does regular expression |
| * replacements. |
| * |
| * @author <a href="mailto:stefan.bodewig@epost.de">Stefan Bodewig</a> |
| */ |
| public class RegexpPatternMapper implements FileNameMapper { |
| protected RegexpMatcher reg = null; |
| protected char[] to = null; |
| protected StringBuffer result = new StringBuffer(); |
| |
| public RegexpPatternMapper() throws BuildException { |
| reg = (new RegexpMatcherFactory()).newRegexpMatcher(); |
| } |
| |
| /** |
| * Sets the "from" pattern. Required. |
| */ |
| public void setFrom(String from) throws BuildException { |
| try { |
| reg.setPattern(from); |
| } catch (NoClassDefFoundError e) { |
| // depending on the implementation the actual RE won't |
| // get instantiated in the constructor. |
| throw new BuildException("Cannot load regular expression matcher", |
| e); |
| } |
| } |
| |
| /** |
| * Sets the "to" pattern. Required. |
| */ |
| public void setTo(String to) { |
| this.to = to.toCharArray(); |
| } |
| |
| /** |
| * Returns null if the source file name doesn't match the |
| * "from" pattern, an one-element array containing the |
| * translated file otherwise. |
| */ |
| public String[] mapFileName(String sourceFileName) { |
| if (reg == null || to == null |
| || !reg.matches(sourceFileName)) { |
| return null; |
| } |
| return new String[] {replaceReferences(sourceFileName)}; |
| } |
| |
| /** |
| * Replace all backreferences in the to pattern with the matched |
| * groups of the source. |
| */ |
| protected String replaceReferences(String source) { |
| Vector v = reg.getGroups(source); |
| |
| result.setLength(0); |
| for (int i=0; i<to.length; i++) { |
| if (to[i] == '\\') { |
| if (++i < to.length) { |
| int value = Character.digit(to[i], 10); |
| if (value > -1) { |
| result.append((String) v.elementAt(value)); |
| } else { |
| result.append(to[i]); |
| } |
| } else { |
| // XXX - should throw an exception instead? |
| result.append('\\'); |
| } |
| } else { |
| result.append(to[i]); |
| } |
| } |
| return result.toString(); |
| } |
| |
| } |