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: import org.mandarax.util.TermIterator;
21:
22: /**
23: * Interface for objects managing terms such as facts and complex terms.
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 TermContainer {
29:
30: /**
31: * Get the terms (as an array).
32: * <strong>Warning</strong>This method shouyld return the array holding the terms and not a copy or an array view.
33: * I.e., the array can be manipulated directly in order to set new terms.
34: * @return the term contained
35: */
36: public Term[] getTerms();
37:
38: /**
39: * Set a term at a certain position.
40: * @param t a term
41: * @param i a position
42: */
43: public void setTerm(Term t, int i);
44:
45: /**
46: * Iterate the terms.
47: * @return a term iterator
48: */
49: public TermIterator terms();
50: }
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