01: /*
02: * (c) Copyright 2008 by Volker Bergmann. All rights reserved.
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, is permitted under the terms of the
06: * GNU General Public License.
07: *
08: * For redistributing this software or a derivative work under a license other
09: * than the GPL-compatible Free Software License as defined by the Free
10: * Software Foundation or approved by OSI, you must first obtain a commercial
11: * license to this software product from Volker Bergmann.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
14: * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
15: * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
16: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
17: * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
18: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24: * POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: package org.databene.id;
28:
29: /**
30: * Iterates through a series of increasing numbers.<br/><br/>
31: * Created: 27.01.2008 12:13:35
32: * @since 0.4.0
33: * @author Volker Bergmann
34: */
35: public class IncrementIdProvider implements IdProvider<Long> {
36:
37: private Long cursor;
38:
39: public IncrementIdProvider() {
40: this (1);
41: }
42:
43: public IncrementIdProvider(long initialValue) {
44: this .cursor = initialValue;
45: }
46:
47: // IdProvider interface --------------------------------------------------------------------------------------------
48:
49: public Class<Long> getType() {
50: return Long.class;
51: }
52:
53: public boolean hasNext() {
54: return true;
55: }
56:
57: public Long next() {
58: return cursor++;
59: }
60:
61: public void remove() {
62: throw new UnsupportedOperationException("Removal not supported");
63: }
64:
65: public void close() {
66: // nothing to do
67: }
68:
69: }
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