| /* |
| * 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.Vector; |
| import org.apache.regexp.RE; |
| import org.apache.tools.ant.BuildException; |
| |
| /*** |
| * Regular expression implementation using the Jakarta Regexp package |
| */ |
| public class JakartaRegexpRegexp extends JakartaRegexpMatcher |
| implements Regexp { |
| |
| private static final int DECIMAL = 10; |
| |
| /** Constructor for JakartaRegexpRegexp */ |
| public JakartaRegexpRegexp() { |
| super(); |
| } |
| |
| /** |
| * Convert ant regexp substitution option to apache regex options. |
| * |
| * @param options the ant regexp options |
| * @return the apache regex substition options |
| */ |
| protected int getSubsOptions(int options) { |
| int subsOptions = RE.REPLACE_FIRSTONLY; |
| if (RegexpUtil.hasFlag(options, REPLACE_ALL)) { |
| subsOptions = RE.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 { |
| Vector v = getGroups(input, options); |
| |
| // replace \1 with the corresponding group |
| StringBuffer result = new StringBuffer(); |
| for (int i = 0; i < argument.length(); i++) { |
| char c = argument.charAt(i); |
| if (c == '\\') { |
| if (++i < argument.length()) { |
| c = argument.charAt(i); |
| int value = Character.digit(c, DECIMAL); |
| if (value > -1) { |
| result.append((String) v.elementAt(value)); |
| } else { |
| result.append(c); |
| } |
| } else { |
| // XXX - should throw an exception instead? |
| result.append('\\'); |
| } |
| } else { |
| result.append(c); |
| } |
| } |
| argument = result.toString(); |
| |
| RE reg = getCompiledPattern(options); |
| int sOptions = getSubsOptions(options); |
| return reg.subst(input, argument, sOptions); |
| } |
| } |