01: package org.mandarax.util;
02:
03: /*
04: * Copyright (C) 1999-2004 <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</a>
05: *
06: * This library is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU Lesser General Public
08: * License as published by the Free Software Foundation; either
09: * version 2 of the License, or (at your option) any later version.
10: *
11: * This library is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * Lesser General Public License for more details.
15: *
16: * You should have received a copy of the GNU Lesser General Public
17: * License along with this library; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19: */
20:
21: import org.mandarax.kernel.Predicate;
22:
23: /**
24: * Utility to generate slot names for predicates.
25: * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
26: * @version 3.4 <7 March 05>
27: * @since 3.0
28: */
29:
30: public class PredicateUtils {
31: private static final String SLOT = "slot";
32:
33: /**
34: * Get the slot name for a predicate.
35: * @return a slot name
36: * @param predicate a predicate
37: * @param index an index
38: */
39: public static String getSlotName(Predicate predicate, int index) {
40: if (index >= predicate.getStructure().length)
41: throw new IllegalArgumentException("Slot number " + index
42: + " does not exist for predicate " + predicate);
43: return SLOT + (index + 1);
44: }
45:
46: }
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