001package votorola.g.web.gwt; // Copyright 2012, Michael Allan.  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE.
002
003import java.util.regex.MatchResult;
004
005
006/** A partial implementation of match result that never sets an empty string for a group
007  * value in lieu of a null value.  This is intended to eliminate client variance in cases
008  * where an empty string is not expected in the result.  For example, {@linkplain
009  * com.google.gwt.regexp.shared.MatchResult#getGroup(int) GWT's API} says, "If the given
010  * group was optional and did not match, the behavior is browser-dependent".
011  */
012public final class MatchResultNE implements MatchResult
013{
014
015
016    /** Constructs a MatchResultNE.
017      */
018    public MatchResultNE( com.google.gwt.regexp.shared.MatchResult _m ) { m = _m; }
019
020
021
022   // - M a t c h - R e s u l t ----------------------------------------------------------
023
024
025    public int end() { return start() + group().length(); }
026
027
028
029    /** Throws {@linkplain UnsupportedOperationException UnsupportedOperationException}.
030      */
031    public int end( int g ) { throw new UnsupportedOperationException(); }
032
033
034
035    public String group() { return m.getGroup( 0 ); }
036
037
038
039    public String group( int g )
040    {
041        String s = m.getGroup( g );
042        if( g > 0 && s != null && s.length() == 0 ) s = null;
043        return s;
044    }
045
046
047
048    public int groupCount() { return m.getGroupCount() - 1; }
049
050
051
052    public int start() { return m.getIndex(); }
053
054
055
056    /** Throws {@linkplain UnsupportedOperationException UnsupportedOperationException}.
057      */
058    public int start( int g ) { throw new UnsupportedOperationException(); }
059
060
061
062//// P r i v a t e ///////////////////////////////////////////////////////////////////////
063
064
065    private final com.google.gwt.regexp.shared.MatchResult m;
066
067
068}