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.platform.db;
28:
29: import java.sql.Connection;
30:
31: import org.databene.commons.HeavyweightIterator;
32: import org.databene.id.IdProvider;
33:
34: /**
35: * Returns the results of a query as Long values.<br/><br/>
36: * Created: 01.02.2008 14:53:29
37: * @since 0.4.0
38: * @author Volker Bergmann
39: */
40: public class LongQueryIdProvider implements IdProvider<Long> {
41:
42: private HeavyweightIterator<String> realIterator;
43:
44: // constructors ----------------------------------------------------------------------------------------------------
45:
46: public LongQueryIdProvider(Connection connection, String query) {
47: realIterator = new QueryIdProvider(connection, query);
48: }
49:
50: // HeavyweightIterator interface -----------------------------------------------------------------------------------
51:
52: public Class<Long> getType() {
53: return Long.class;
54: }
55:
56: public boolean hasNext() {
57: return realIterator.hasNext();
58: }
59:
60: public Long next() {
61: return Long.parseLong(realIterator.next());
62: }
63:
64: public void remove() {
65: throw new UnsupportedOperationException(
66: "Removal is not supported.");
67: }
68:
69: public void close() {
70: realIterator.close();
71: }
72:
73: // java.lang.Object overrides --------------------------------------------------------------------------------------
74:
75: @Override
76: public String toString() {
77: return getClass().getSimpleName() + '[' + realIterator + ']';
78: }
79:
80: }
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