| /* |
| * 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 java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import java.util.regex.PatternSyntaxException; |
| import 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. |
| * |
| * <p>Group 0 will be the full match, the rest are the |
| * parenthesized subexpressions</p>. |
| * |
| * @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. |
| * |
| * <p>Group 0 will be the full match, the rest are the |
| * parenthesized subexpressions</p>. |
| * |
| * @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; |
| } |
| |
| } |