01: /*
02: * Copyright (C) 1999-2004 <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</a>
03: *
04: * This library is free software; you can redistribute it and/or
05: * modify it under the terms of the GNU Lesser General Public
06: * License as published by the Free Software Foundation; either
07: * version 2 of the License, or (at your option) any later version.
08: *
09: * This library is distributed in the hope that it will be useful,
10: * but WITHOUT ANY WARRANTY; without even the implied warranty of
11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12: * Lesser General Public License for more details.
13: *
14: * You should have received a copy of the GNU Lesser General Public
15: * License along with this library; if not, write to the Free Software
16: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17: */
18: package org.mandarax.kernel;
19:
20: /**
21: * Predicates, defined by name and structure.
22: * In version 3.0 named slots have been added. This is to support the
23: * JDBC driver - predicates are considered as 'tables' and terms as 'columns'.
24: * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
25: * @version 3.4 <7 March 05>
26: * @since 1.0
27: */
28: public interface Predicate extends Constructor {
29: /**
30: * Get the slot names.
31: * @return an array of strings, the length of the array is the same as
32: * the length of the array of terms (the structure of the predicate)
33: */
34: public String[] getSlotNames();
35:
36: /**
37: * Set the slot names.
38: * @param names an array of strings, the length of the array is the same as
39: * the length of the array of terms (the structure of the predicate)
40: */
41: public void setSlotNames(String[] names);
42:
43: /**
44: * Indicates whether the slot names can be modified.
45: * If false, setSlotNames should either throw an exception or be ignored
46: * @return a boolean
47: */
48: public boolean slotNamesCanBeEdited();
49:
50: }
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