/*
* Copyright 2001-2004 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.
*
*/
package org.apache.tools.ant.util.regexp;
import org.apache.oro.text.regex.Perl5Substitution;
import org.apache.oro.text.regex.Substitution;
import org.apache.oro.text.regex.Util;
import org.apache.tools.ant.BuildException;
/***
* Regular expression implementation using the Jakarta Oro package
* @author Matthew Inger <a href="mailto:mattinger@mindless.com">mattinger@mindless.com</a>
*/
public class JakartaOroRegexp extends JakartaOroMatcher implements Regexp {
public JakartaOroRegexp() {
super();
}
public String substitute(String input, String argument, int options)
throws BuildException {
// translate \1 to $1 so that the Perl5Substitution will work
StringBuffer subst = new StringBuffer();
for (int i = 0; i < argument.length(); i++) {
char c = argument.charAt(i);
if (c == '$') {
subst.append('\\');
subst.append('$');
} else if (c == '\\') {
if (++i < argument.length()) {
c = argument.charAt(i);
int value = Character.digit(c, 10);
if (value > -1) {
subst.append("$").append(value);
} else {
subst.append(c);
}
} else {
// XXX - should throw an exception instead?
subst.append('\\');
}
} else {
subst.append(c);
}
}
// Do the substitution
Substitution s =
new Perl5Substitution(subst.toString(),
Perl5Substitution.INTERPOLATE_ALL);
return Util.substitute(matcher,
getCompiledPattern(options),
s,
input,
getSubsOptions(options));
}
protected int getSubsOptions(int options) {
boolean replaceAll = RegexpUtil.hasFlag(options, REPLACE_ALL);
int subsOptions = 1;
if (replaceAll) {
subsOptions = Util.SUBSTITUTE_ALL;
}
return subsOptions;
}
}