1 ////////////////////////////////////////////////////////////////////////////////
2 // MillScript: an Open Spice interpreter and batch website creation tool
3 // Copyright (C) 2001-2005 Open World Ltd
4 // Copyright (C) 2005 Kevin Rogers
5 //
6 // This file is part of MillScript.
7 //
8 // MillScript is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU General Public License as published by the Free
10 // Software Foundation; either version 2 of the License, or (at your option)
11 // any later version.
12 //
13 // MillScript is distributed in the hope that it will be useful, but WITHOUT
14 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 // more details.
17 //
18 // You should have received a copy of the GNU General Public License along with
19 // MillScript; if not, write to the Free Software Foundation, Inc., 59 Temple
20 // Place, Suite 330, Boston, MA 02111-1307 USA
21 ////////////////////////////////////////////////////////////////////////////////
22 package org.millscript.millscript.functions;
23
24 import org.millscript.millscript.datatypes.Binding;
25 import org.millscript.millscript.tools.CastLibrary;
26
27 import java.util.regex.Matcher;
28
29 /**
30 * This class implements the MillScript <code>findMatch</code> function.
31 */
32 public final class FindMatchFunction extends BinaryFunction {
33
34 /**
35 * @see org.millscript.millscript.functions.BinaryFunction#apply2(java.lang.Object, java.lang.Object)
36 */
37 @Override
38 public Object apply2( final Object a1, final Object a2 ) {
39 // Get the string we want to match the regex against
40 final String input = CastLibrary.toString( a2 );
41 // Get the compiled regex and create a matcher to match the regex
42 // against the input and push the result
43 final Matcher matcher = CastLibrary.toPattern( a1 ).matcher( input );
44 // Is there a match against part of the input string?
45 if ( matcher.find() ) {
46 // There is a match, so return a binding for it
47 return Binding.newBinding( input, matcher );
48 } else {
49 // No matches so we return null/absent
50 return null;
51 }
52 }
53
54 }