com.greenpepper.shaded.org.apache.tools.ant.util.regexp.Jdk14RegexpMatcher Maven / Gradle / Ivy
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/*
* 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 com.greenpepper.shaded.org.apache.tools.ant.util.regexp;
import java.util.Vector;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
import com.greenpepper.shaded.org.apache.tools.ant.BuildException;
/**
* Implementation of RegexpMatcher for the built-in regexp matcher of
* JDK 1.4. UNIX_LINES option is enabled as a default.
*
*/
public class Jdk14RegexpMatcher implements RegexpMatcher {
private String pattern;
/** Constructor for JakartaOroRegexp */
public Jdk14RegexpMatcher() {
}
/**
* Set the regexp pattern from the String description.
* @param pattern the pattern to match
*/
public void setPattern(String pattern) {
this.pattern = pattern;
}
/**
* Get a String representation of the regexp pattern
* @return the pattern
* @throws BuildException on error
*/
public String getPattern() {
return pattern;
}
/**
* Get a compiled representation of the regexp pattern
* @param options the options
* @return the compiled pattern
* @throws BuildException on error
*/
protected Pattern getCompiledPattern(int options)
throws BuildException {
int cOptions = getCompilerOptions(options);
try {
Pattern p = Pattern.compile(this.pattern, cOptions);
return p;
} catch (PatternSyntaxException e) {
throw new BuildException(e);
}
}
/**
* Does the given argument match the pattern using default options?
* @param argument the string to match against
* @return true if the pattern matches
* @throws BuildException on error
*/
public boolean matches(String argument) throws BuildException {
return matches(argument, MATCH_DEFAULT);
}
/**
* Does the given argument match the pattern?
* @param input the string to match against
* @param options the regex options to use
* @return true if the pattern matches
* @throws BuildException on error
*/
public boolean matches(String input, int options)
throws BuildException {
try {
Pattern p = getCompiledPattern(options);
return p.matcher(input).find();
} catch (Exception e) {
throw new BuildException(e);
}
}
/**
* Returns a Vector of matched groups found in the argument
* using default options.
*
* Group 0 will be the full match, the rest are the
* parenthesized subexpressions
.
*
* @param argument the string to match against
* @return the vector of groups
* @throws BuildException on error
*/
public Vector getGroups(String argument) throws BuildException {
return getGroups(argument, MATCH_DEFAULT);
}
/**
* Returns a Vector of matched groups found in the argument.
*
* Group 0 will be the full match, the rest are the
* parenthesized subexpressions
.
*
* @param input the string to match against
* @param options the regex options to use
* @return the vector of groups
* @throws BuildException on error
*/
public Vector getGroups(String input, int options)
throws BuildException {
Pattern p = getCompiledPattern(options);
Matcher matcher = p.matcher(input);
if (!matcher.find()) {
return null;
}
Vector v = new Vector();
int cnt = matcher.groupCount();
for (int i = 0; i <= cnt; i++) {
String match = matcher.group(i);
// treat non-matching groups as empty matches
if (match == null) {
match = "";
}
v.addElement(match);
}
return v;
}
/**
* Convert the generic options to the regex compiler specific options.
* @param options the generic options
* @return the specific options
*/
protected int getCompilerOptions(int options) {
// be strict about line separator
int cOptions = Pattern.UNIX_LINES;
if (RegexpUtil.hasFlag(options, MATCH_CASE_INSENSITIVE)) {
cOptions |= Pattern.CASE_INSENSITIVE;
}
if (RegexpUtil.hasFlag(options, MATCH_MULTILINE)) {
cOptions |= Pattern.MULTILINE;
}
if (RegexpUtil.hasFlag(options, MATCH_SINGLELINE)) {
cOptions |= Pattern.DOTALL;
}
return cOptions;
}
}