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Java > Open Source Codes > com > hp > hpl > jena > util > CollectionFactory


1 /*
2   (c) Copyright 2004, 2005 Hewlett-Packard Development Company, LP, all rights reserved.
3   [See end of file]
4   $Id: CollectionFactory.java,v 1.2 2005/02/21 12:18:54 andy_seaborne Exp $
5 */
6 package com.hp.hpl.jena.util;
7
8 import java.util.*;
9
10 /**
11     CollectionFactory - a central place for allocating sets and maps, mostly so that
12     it's easy to plug in new implementations (eg trove).
13     
14     @author kers
15 */
16 public class CollectionFactory
17     {
18     /**
19          Answer a new Map which uses hashing for lookup.
20     */
21     public static Map createHashedMap() { return new HashMap(); }
22     
23     /**
24          Answer a new Map which uses hashing for lookup and has initial size
25          <code>size</code>.
26     */
27     public static Map createHashedMap( int size ) { return new HashMap( size ); }
28     
29     /**
30          Answer a new Map which uses hashing for lookup and is initialised to be
31          a copy of <code>toCopy</code>.
32     */
33     public static Map createHashedMap( Map toCopy ) { return new HashMap( toCopy ); }
34         
35     /**
36          Answer a new Set which uses haashing for lookup.
37     */
38     public static Set createHashedSet() { return new HashSet(); }
39     
40     /**
41          Answer a new Set which uses hashing for lookup and is initialised as a copy
42          of <code>toCopy</code>.
43     */
44     public static Set createHashedSet( Collection toCopy ) { return new HashSet( toCopy ); }
45     }
46
47 /*
48     (c) Copyright 2004, 2005 Hewlett-Packard Development Company, LP
49     All rights reserved.
50     
51     Redistribution and use in source and binary forms, with or without
52     modification, are permitted provided that the following conditions
53     are met:
54     
55     1. Redistributions of source code must retain the above copyright
56        notice, this list of conditions and the following disclaimer.
57     
58     2. Redistributions in binary form must reproduce the above copyright
59        notice, this list of conditions and the following disclaimer in the
60        documentation and/or other materials provided with the distribution.
61     
62     3. The name of the author may not be used to endorse or promote products
63        derived from this software without specific prior written permission.
64     
65     THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
66     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
67     OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
68     IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
69     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
70     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
71     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
72     THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
73     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
74     THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
75 */
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