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.tools.CastLibrary;
25
26 import java.util.regex.Pattern;
27
28 /**
29 * This class implements the MillScript <code>isPrefixMatch</code> function.
30 */
31 public final class IsPrefixMatchFunction extends BinaryFunction {
32
33 /**
34 * @see org.millscript.millscript.functions.BinaryFunction#apply2(java.lang.Object, java.lang.Object)
35 */
36 @Override
37 public Object apply2( final Object a1, final Object a2 ) {
38 // Get the compiled regex
39 final Pattern pattern = CastLibrary.toPattern( a1 );
40 // Get the string we want to match the regex against
41 final String input = CastLibrary.toString( a2 );
42 // Try to match the regex against the start of the input and return the
43 // result
44 if ( pattern.matcher( input ).lookingAt() ) {
45 return Boolean.TRUE;
46 } else {
47 return Boolean.FALSE;
48 }
49 }
50
51 }