| /* |
| * 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.regexp; |
| |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import org.apache.tools.ant.BuildException; |
| |
| /*** |
| * Regular expression implementation using the JDK 1.4 regular expression package |
| */ |
| public class Jdk14RegexpRegexp extends Jdk14RegexpMatcher implements Regexp { |
| |
| private static final int DECIMAL = 10; |
| |
| /** Constructor for Jdk14RegexpRegexp */ |
| public Jdk14RegexpRegexp() { |
| super(); |
| } |
| |
| /** |
| * Convert ant regexp substitution option to jdk1.4 options. |
| * |
| * @param options the ant regexp options |
| * @return the jdk14 substition options |
| */ |
| protected int getSubsOptions(int options) { |
| int subsOptions = REPLACE_FIRST; |
| if (RegexpUtil.hasFlag(options, REPLACE_ALL)) { |
| subsOptions = REPLACE_ALL; |
| } |
| return subsOptions; |
| } |
| |
| /** |
| * Perform a substitution on the regular expression. |
| * @param input The string to substitute on |
| * @param argument The string which defines the substitution |
| * @param options The list of options for the match and replace. |
| * @return the result of the operation |
| * @throws BuildException on error |
| */ |
| public String substitute(String input, String argument, int options) |
| throws BuildException { |
| // translate \1 to $(1) so that the Matcher will work |
| StringBuffer subst = new StringBuffer(); |
| for (int i = 0; i < argument.length(); i++) { |
| char c = argument.charAt(i); |
| if (c == '$') { |
| subst.append('\\'); |
| subst.append('$'); |
| } else if (c == '\\') { |
| if (++i < argument.length()) { |
| c = argument.charAt(i); |
| int value = Character.digit(c, DECIMAL); |
| if (value > -1) { |
| subst.append("$").append(value); |
| } else { |
| subst.append(c); |
| } |
| } else { |
| // XXX - should throw an exception instead? |
| subst.append('\\'); |
| } |
| } else { |
| subst.append(c); |
| } |
| } |
| argument = subst.toString(); |
| |
| int sOptions = getSubsOptions(options); |
| Pattern p = getCompiledPattern(options); |
| StringBuffer sb = new StringBuffer(); |
| |
| Matcher m = p.matcher(input); |
| if (RegexpUtil.hasFlag(sOptions, REPLACE_ALL)) { |
| sb.append(m.replaceAll(argument)); |
| } else { |
| boolean res = m.find(); |
| if (res) { |
| m.appendReplacement(sb, argument); |
| m.appendTail(sb); |
| } else { |
| sb.append(input); |
| } |
| } |
| return sb.toString(); |
| } |
| } |