001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.util.text;
016    
017    /**
018     * Matches a whitespace character.
019     * 
020     * @author mb
021     * @since 4.0
022     */
023    public class WhitespaceMatcher implements ICharacterMatcher 
024    {
025        private boolean _matchEndLines;
026        
027        /**
028         * Creates an object that matches all whitespace characters, line terminators included
029         */
030        public WhitespaceMatcher()
031        {
032            this(true);
033        }
034        
035        /**
036         * Creates an object that matches whitespace characters. 
037         * Line terminators are included only if this is specified.
038         * 
039         * @param matchEndLines match line terminators as well
040         */
041        public WhitespaceMatcher(boolean matchEndLines)
042        {
043            _matchEndLines = matchEndLines;
044        }
045        
046        /**
047         * Matches whitespace characters. Line terminators may be matched 
048         * depending on the constructor used to create the object.
049         * 
050         * @see org.apache.tapestry.util.text.ICharacterMatcher#matches(char)
051         */
052        public boolean matches(char ch)
053        {
054            if (!_matchEndLines)
055                if (ch == '\n' || ch == '\r')
056                    return false;
057            
058            return Character.isWhitespace(ch);
059        }
060    }