01: package org.tigris.scarab.util;
02:
03: /* ================================================================
04: * Copyright (c) 2000-2002 CollabNet. All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions are
08: * met:
09: *
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: *
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: *
17: * 3. The end-user documentation included with the redistribution, if
18: * any, must include the following acknowlegement: "This product includes
19: * software developed by Collab.Net <http://www.Collab.Net/>."
20: * Alternately, this acknowlegement may appear in the software itself, if
21: * and wherever such third-party acknowlegements normally appear.
22: *
23: * 4. The hosted project names must not be used to endorse or promote
24: * products derived from this software without prior written
25: * permission. For written permission, please contact info@collab.net.
26: *
27: * 5. Products derived from this software may not use the "Tigris" or
28: * "Scarab" names nor may "Tigris" or "Scarab" appear in their names without
29: * prior written permission of Collab.Net.
30: *
31: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
32: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
33: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
34: * IN NO EVENT SHALL COLLAB.NET OR ITS CONTRIBUTORS BE LIABLE FOR ANY
35: * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
37: * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
38: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
39: * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
40: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42: *
43: * ====================================================================
44: *
45: * This software consists of voluntary contributions made by many
46: * individuals on behalf of Collab.Net.
47: */
48:
49: public class SubsetIteratorWithSize extends SubsetIterator implements
50: IteratorWithSize {
51: private final int size;
52:
53: /**
54: * Constructs an itarator on a subset of the given iterator.
55: * The SubsetIterator starts with the offset-element, iterates
56: * over <code>elements</code> elements and can return the size
57: *
58: * @param i the IteratorWithSize to subset
59: * @param offset the position of the first element of the subset
60: * @param elements the number of elements the subset should have
61: */
62: public SubsetIteratorWithSize(IteratorWithSize i, int offset,
63: int elements) {
64: super (i, offset, elements);
65: this .size = (offset + elements > i.size()) ? i.size() - offset
66: : elements;
67: }
68:
69: /**
70: * Constructs an itarator on a subset of the given iterator.
71: * The SubsetIteratorWithSize starts with the offset-element and iterates
72: * over limit elements and can return its size
73: *
74: * @param i the IteratorWithSize to subset
75: * @param offset the position of the first element of the subset
76: * @param elements the number of elements the subset should have
77: */
78: public SubsetIteratorWithSize(IteratorWithSize i, int offset) {
79: super (i, offset);
80: this .size = i.size() - offset;
81: }
82:
83: public int size() {
84: return size;
85: }
86: }
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