01: /*
02: * Copyright (C) 2004 NNL Technology AB
03: * Visit www.infonode.net for information about InfoNode(R)
04: * products and how to contact NNL Technology AB.
05: *
06: * This program is free software; you can redistribute it and/or
07: * modify it under the terms of the GNU General Public License
08: * as published by the Free Software Foundation; either version 2
09: * of the License, or (at your option) any later version.
10: *
11: * This program 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
14: * GNU General Public License for more details.
15: *
16: * You should have received a copy of the GNU General Public License
17: * along with this program; if not, write to the Free Software
18: * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
19: * MA 02111-1307, USA.
20: */
21:
22: // $Id: ConstMap.java,v 1.2 2004/06/17 13:01:11 johan Exp $
23: package net.infonode.util.collection.map.base;
24:
25: import net.infonode.util.collection.ConstCollection;
26:
27: /**
28: * An immutable map.
29: *
30: * @author $Author: johan $
31: * @version $Revision: 1.2 $
32: */
33: public interface ConstMap extends ConstCollection {
34: /**
35: * Returns the value associated with the key.
36: *
37: * @param key the key
38: * @return the value associated with the key, null if no value is associated with the key
39: */
40: Object get(Object key);
41:
42: /**
43: * Returns true if this map contains the key.
44: *
45: * @param key the key
46: * @return true if this map contains the key
47: */
48: boolean containsKey(Object key);
49:
50: /**
51: * Returns true if this map contains the value.
52: *
53: * @param value the value
54: * @return true if this map contains the value
55: */
56: boolean containsValue(Object value);
57:
58: /**
59: * Returns an iterator for this map.
60: *
61: * @return an iterator for this map
62: */
63: ConstMapIterator constIterator();
64: }
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