| /* |
| * 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. |
| * |
| */ |
| |
| package org.apache.tools.ant.util; |
| |
| import java.util.Vector; |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.util.regexp.RegexpMatcher; |
| import org.apache.tools.ant.util.regexp.RegexpMatcherFactory; |
| |
| /** |
| * Implementation of FileNameMapper that does regular expression |
| * replacements. |
| * |
| */ |
| public class RegexpPatternMapper implements FileNameMapper { |
| |
| private static final int DECIMAL = 10; |
| |
| // CheckStyle:VisibilityModifier OFF - bc |
| protected RegexpMatcher reg = null; |
| protected char[] to = null; |
| protected StringBuffer result = new StringBuffer(); |
| // CheckStyle:VisibilityModifier ON |
| |
| /** |
| * Constructor for RegexpPatternMapper. |
| * @throws BuildException on error. |
| */ |
| public RegexpPatternMapper() throws BuildException { |
| reg = (new RegexpMatcherFactory()).newRegexpMatcher(); |
| } |
| |
| private boolean handleDirSep = false; |
| private int regexpOptions = 0; |
| |
| /** |
| * Attribute specifing whether to ignore the difference |
| * between / and \ (the two common directory characters). |
| * @param handleDirSep a boolean, default is false. |
| * @since Ant 1.6.3 |
| */ |
| public void setHandleDirSep(boolean handleDirSep) { |
| this.handleDirSep = handleDirSep; |
| } |
| |
| /** |
| * Attribute specifing whether to ignore the case difference |
| * in the names. |
| * |
| * @param caseSensitive a boolean, default is false. |
| * @since Ant 1.6.3 |
| */ |
| public void setCaseSensitive(boolean caseSensitive) { |
| if (!caseSensitive) { |
| regexpOptions = RegexpMatcher.MATCH_CASE_INSENSITIVE; |
| } else { |
| regexpOptions = 0; |
| } |
| } |
| |
| /** |
| * Sets the "from" pattern. Required. |
| * @param from the from pattern. |
| * @throws BuildException on error. |
| */ |
| 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. |
| * @param to the to pattern. |
| * @throws BuildException on error. |
| */ |
| 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. |
| * @param sourceFileName the source file name |
| * @return a one-element array containing the translated file or |
| * null if the to pattern did not match |
| */ |
| public String[] mapFileName(String sourceFileName) { |
| if (handleDirSep) { |
| if (sourceFileName.indexOf("\\") != -1) { |
| sourceFileName = sourceFileName.replace('\\', '/'); |
| } |
| } |
| if (reg == null || to == null |
| || !reg.matches(sourceFileName, regexpOptions)) { |
| return null; |
| } |
| return new String[] {replaceReferences(sourceFileName)}; |
| } |
| |
| /** |
| * Replace all backreferences in the to pattern with the matched |
| * groups of the source. |
| * @param source the source file name. |
| * @return the translated file name. |
| */ |
| protected String replaceReferences(String source) { |
| Vector v = reg.getGroups(source, regexpOptions); |
| |
| result.setLength(0); |
| for (int i = 0; i < to.length; i++) { |
| if (to[i] == '\\') { |
| if (++i < to.length) { |
| int value = Character.digit(to[i], DECIMAL); |
| 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.substring(0); |
| } |
| |
| } |