01: /* Copyright (C) 2004 - 2007 db4objects Inc. http://www.db4o.com
02:
03: This file is part of the db4o open source object database.
04:
05: db4o is free software; you can redistribute it and/or modify it under
06: the terms of version 2 of the GNU General Public License as published
07: by the Free Software Foundation and as clarified by db4objects' GPL
08: interpretation policy, available at
09: http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
10: Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
11: Suite 350, San Mateo, CA 94403, USA.
12:
13: db4o is distributed in the hope that it will be useful, but WITHOUT ANY
14: WARRANTY; without even the implied warranty of MERCHANTABILITY or
15: FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16: for more details.
17:
18: You should have received a copy of the GNU General Public License along
19: with this program; if not, write to the Free Software Foundation, Inc.,
20: 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21: package com.db4o.internal.query.result;
22:
23: import com.db4o.foundation.*;
24: import com.db4o.internal.*;
25: import com.db4o.internal.query.processor.*;
26:
27: /**
28: * @exclude
29: */
30: public class SnapShotQueryResult extends AbstractLateQueryResult {
31:
32: public SnapShotQueryResult(Transaction transaction) {
33: super (transaction);
34: }
35:
36: public void loadFromClassIndex(final ClassMetadata clazz) {
37: createSnapshot(classIndexIterable(clazz));
38: }
39:
40: public void loadFromClassIndexes(
41: final ClassMetadataIterator classCollectionIterator) {
42: createSnapshot(classIndexesIterable(classCollectionIterator));
43: }
44:
45: public void loadFromQuery(final QQuery query) {
46: final Iterator4 _iterator = query.executeSnapshot();
47: _iterable = new Iterable4() {
48: public Iterator4 iterator() {
49: _iterator.reset();
50: return _iterator;
51: }
52: };
53: }
54:
55: private void createSnapshot(Iterable4 iterable) {
56: final Tree ids = TreeInt.addAll(null, new IntIterator4Adaptor(
57: iterable));
58: _iterable = new Iterable4() {
59: public Iterator4 iterator() {
60: return new TreeKeyIterator(ids);
61: }
62:
63: };
64: }
65:
66: }
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