1 ////////////////////////////////////////////////////////////////////////////////
2 // MillScript: an Open Spice interpreter and batch website creation tool
3 // Copyright (C) 2005 Kevin Rogers
4 //
5 // This file is part of MillScript.
6 //
7 // MillScript is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU General Public License as published by the Free
9 // Software Foundation; either version 2 of the License, or (at your option)
10 // any later version.
11 //
12 // MillScript is distributed in the hope that it will be useful, but WITHOUT
13 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 // more details.
16 //
17 // You should have received a copy of the GNU General Public License along with
18 // MillScript; if not, write to the Free Software Foundation, Inc., 59 Temple
19 // Place, Suite 330, Boston, MA 02111-1307 USA
20 ////////////////////////////////////////////////////////////////////////////////
21 package org.millscript.millscript.functions;
22
23 import org.millscript.commons.util.IList;
24 import org.millscript.commons.util.MapIterator;
25 import org.millscript.millscript.tools.CastLibrary;
26
27 /**
28 * This class implements the MillScript <code>join</code> function.
29 */
30 public final class JoinFunction extends BinaryFunction {
31
32 /**
33 * @see org.millscript.millscript.functions.BinaryFunction#apply2(java.lang.Object, java.lang.Object)
34 */
35 @Override
36 public Object apply2( final Object a1, final Object a2 ) {
37 // Get the string we want to use as to glue together each item in the
38 // list of strings
39 final String sep = CastLibrary.toString( a1 );
40 // Get the list of strings we want to join together
41 final IList list = CastLibrary.toIList( a2 );
42 // A buffer for us to construct the joined string in
43 final StringBuffer buffer = new StringBuffer();
44 final MapIterator it = list.iterator( true );
45 while( it.hasNext() ) {
46 // FIXME - This should use CastLibrary to ensure a string value
47 buffer.append( it.nextValue() );
48 if ( it.hasNext() ) {
49 buffer.append( sep );
50 }
51 }
52 // Return the new joined string
53 return buffer.toString();
54 }
55
56 }