/*
* Copyright 2000-2004 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 java.util.Vector;
import org.apache.oro.text.regex.MatchResult;
import org.apache.oro.text.regex.Pattern;
import org.apache.oro.text.regex.Perl5Compiler;
import org.apache.oro.text.regex.Perl5Matcher;
import org.apache.tools.ant.BuildException;
/**
* Implementation of RegexpMatcher for Jakarta-ORO.
*
* @author Stefan Bodewig
* @author <a href="mailto:mattinger@mindless.com">Matthew Inger</a>
*/
public class JakartaOroMatcher implements RegexpMatcher {
private String pattern;
protected final Perl5Compiler compiler = new Perl5Compiler();
protected final Perl5Matcher matcher = new Perl5Matcher();
public JakartaOroMatcher() {
}
/**
* Set the regexp pattern from the String description.
*/
public void setPattern(String pattern) {
this.pattern = pattern;
}
/**
* Get a String representation of the regexp pattern
*/
public String getPattern() {
return this.pattern;
}
/**
* Get a compiled representation of the regexp pattern
*/
protected Pattern getCompiledPattern(int options)
throws BuildException {
try {
// compute the compiler options based on the input options first
Pattern p = compiler.compile(pattern, getCompilerOptions(options));
return p;
} catch (Exception e) {
throw new BuildException(e);
}
}
/**
* Does the given argument match the pattern?
*/
public boolean matches(String argument) throws BuildException {
return matches(argument, MATCH_DEFAULT);
}
/**
* Does the given argument match the pattern?
*/
public boolean matches(String input, int options)
throws BuildException {
Pattern p = getCompiledPattern(options);
return matcher.contains(input, p);
}
/**
* Returns a Vector of matched groups found in the argument.
*
* <p>Group 0 will be the full match, the rest are the
* parenthesized subexpressions</p>.
*/
public Vector getGroups(String argument) throws BuildException {
return getGroups(argument, MATCH_DEFAULT);
}
/**
* Returns a Vector of matched groups found in the argument.
*
* <p>Group 0 will be the full match, the rest are the
* parenthesized subexpressions</p>.
*/
public Vector getGroups(String input, int options)
throws BuildException {
if (!matches(input, options)) {
return null;
}
Vector v = new Vector();
MatchResult mr = matcher.getMatch();
int cnt = mr.groups();
for (int i = 0; i < cnt; i++) {
String match = mr.group(i);
// treat non-matching groups as empty matches
if (match == null) {
match = "";
}
v.addElement(match);
}
return v;
}
protected int getCompilerOptions(int options) {
int cOptions = Perl5Compiler.DEFAULT_MASK;
if (RegexpUtil.hasFlag(options, MATCH_CASE_INSENSITIVE)) {
cOptions |= Perl5Compiler.CASE_INSENSITIVE_MASK;
}
if (RegexpUtil.hasFlag(options, MATCH_MULTILINE)) {
cOptions |= Perl5Compiler.MULTILINE_MASK;
}
if (RegexpUtil.hasFlag(options, MATCH_SINGLELINE)) {
cOptions |= Perl5Compiler.SINGLELINE_MASK;
}
return cOptions;
}
}