| /* |
| * 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; |
| |
| // CheckStyle:HideUtilityClassConstructorCheck OFF - bc |
| |
| /*** |
| * Regular expression utilities class which handles flag operations. |
| * |
| */ |
| public class RegexpUtil { |
| |
| /** |
| * Check the options has a particular flag set. |
| * |
| * @param options an <code>int</code> value |
| * @param flag an <code>int</code> value |
| * @return true if the flag is set |
| */ |
| public static boolean hasFlag(int options, int flag) { |
| return ((options & flag) > 0); |
| } |
| |
| /** |
| * Remove a particular flag from an int value contains the option flags. |
| * |
| * @param options an <code>int</code> value |
| * @param flag an <code>int</code> value |
| * @return the options with the flag unset |
| */ |
| public static int removeFlag(int options, int flag) { |
| return (options & (0xFFFFFFFF - flag)); |
| } |
| |
| /** |
| * convert regex option flag characters to regex options |
| * <dl> |
| * <dt>g</dt><dd>Regexp.REPLACE_ALL</dd> |
| * <dt>i</dt><dd>RegexpMatcher.MATCH_CASE_INSENSITIVE</dd> |
| * <dt>m</dt><dd>RegexpMatcher.MATCH_MULTILINE</dd> |
| * <dt>s</dt><dd>RegexpMatcher.MATCH_SINGLELINE</dd> |
| * </dl> |
| * @param flags the string containing the flags |
| * @return the Regexp option bits |
| * @since Ant 1.8.2 |
| */ |
| public static int asOptions(String flags) { |
| int options = RegexpMatcher.MATCH_DEFAULT; |
| if (flags != null) { |
| options = asOptions(flags.indexOf('i') == -1, |
| flags.indexOf('m') != -1, |
| flags.indexOf('s') != -1); |
| if (flags.indexOf('g') != -1) { |
| options |= Regexp.REPLACE_ALL; |
| } |
| } |
| return options; |
| } |
| |
| /** |
| * Convert flag to regex options. |
| * |
| * @param caseSensitive opposite of RegexpMatcher.MATCH_CASE_INSENSITIVE |
| * @return the Regexp option bits |
| * @since Ant 1.8.2 |
| */ |
| public static int asOptions(boolean caseSensitive) { |
| return asOptions(caseSensitive, false, false); |
| } |
| |
| /** |
| * Convert flags to regex options. |
| * |
| * @param caseSensitive opposite of RegexpMatcher.MATCH_CASE_INSENSITIVE |
| * @param multiLine RegexpMatcher.MATCH_MULTILINE |
| * @param singleLine RegexpMatcher.MATCH_SINGLELINE |
| * @return the Regexp option bits |
| * @since Ant 1.8.2 |
| */ |
| public static int asOptions(boolean caseSensitive, boolean multiLine, |
| boolean singleLine) { |
| int options = RegexpMatcher.MATCH_DEFAULT; |
| if (!caseSensitive) { |
| options = options | RegexpMatcher.MATCH_CASE_INSENSITIVE; |
| } |
| if (multiLine) { |
| options = options | RegexpMatcher.MATCH_MULTILINE; |
| } |
| if (singleLine) { |
| options = options | RegexpMatcher.MATCH_SINGLELINE; |
| } |
| return options; |
| } |
| } |