1/*
2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "IDBIndex.h"
28
29#if ENABLE(INDEXED_DATABASE)
30
31#include "IDBCursorBackendInterface.h"
32#include "IDBDatabaseException.h"
33#include "IDBIndexBackendInterface.h"
34#include "IDBKey.h"
35#include "IDBKeyRange.h"
36#include "IDBObjectStore.h"
37#include "IDBRequest.h"
38#include "IDBTransaction.h"
39
40namespace WebCore {
41
42static const unsigned short defaultDirection = IDBCursor::NEXT;
43
44IDBIndex::IDBIndex(PassRefPtr<IDBIndexBackendInterface> backend, IDBObjectStore* objectStore, IDBTransaction* transaction)
45    : m_backend(backend)
46    , m_objectStore(objectStore)
47    , m_transaction(transaction)
48{
49    ASSERT(m_backend);
50    ASSERT(m_objectStore);
51    ASSERT(m_transaction);
52}
53
54IDBIndex::~IDBIndex()
55{
56}
57
58PassRefPtr<IDBRequest> IDBIndex::openCursor(ScriptExecutionContext* context, PassRefPtr<IDBKeyRange> keyRange, unsigned short direction, ExceptionCode& ec)
59{
60    if (direction != IDBCursor::NEXT && direction != IDBCursor::NEXT_NO_DUPLICATE && direction != IDBCursor::PREV && direction != IDBCursor::PREV_NO_DUPLICATE) {
61        // FIXME: May need to change when specced: http://www.w3.org/Bugs/Public/show_bug.cgi?id=11406
62        ec = IDBDatabaseException::CONSTRAINT_ERR;
63        return 0;
64    }
65
66    RefPtr<IDBRequest> request = IDBRequest::create(context, IDBAny::create(this), m_transaction.get());
67    request->setCursorType(IDBCursorBackendInterface::IndexCursor);
68    m_backend->openCursor(keyRange, direction, request, m_transaction->backend(), ec);
69    if (ec) {
70        request->markEarlyDeath();
71        return 0;
72    }
73    return request;
74}
75
76PassRefPtr<IDBRequest> IDBIndex::openKeyCursor(ScriptExecutionContext* context, PassRefPtr<IDBKeyRange> keyRange, unsigned short direction, ExceptionCode& ec)
77{
78    if (direction != IDBCursor::NEXT && direction != IDBCursor::NEXT_NO_DUPLICATE && direction != IDBCursor::PREV && direction != IDBCursor::PREV_NO_DUPLICATE) {
79        // FIXME: May need to change when specced: http://www.w3.org/Bugs/Public/show_bug.cgi?id=11406
80        ec = IDBDatabaseException::CONSTRAINT_ERR;
81        return 0;
82    }
83
84    RefPtr<IDBRequest> request = IDBRequest::create(context, IDBAny::create(this), m_transaction.get());
85    request->setCursorType(IDBCursorBackendInterface::IndexKeyCursor);
86    m_backend->openKeyCursor(keyRange, direction, request, m_transaction->backend(), ec);
87    if (ec) {
88        request->markEarlyDeath();
89        return 0;
90    }
91    return request;
92}
93
94PassRefPtr<IDBRequest> IDBIndex::get(ScriptExecutionContext* context, PassRefPtr<IDBKey> key, ExceptionCode& ec)
95{
96    RefPtr<IDBRequest> request = IDBRequest::create(context, IDBAny::create(this), m_transaction.get());
97    m_backend->get(key, request, m_transaction->backend(), ec);
98    if (ec) {
99        request->markEarlyDeath();
100        return 0;
101    }
102    return request;
103}
104
105PassRefPtr<IDBRequest> IDBIndex::getKey(ScriptExecutionContext* context, PassRefPtr<IDBKey> key, ExceptionCode& ec)
106{
107    RefPtr<IDBRequest> request = IDBRequest::create(context, IDBAny::create(this), m_transaction.get());
108    m_backend->getKey(key, request, m_transaction->backend(), ec);
109    if (ec) {
110        request->markEarlyDeath();
111        return 0;
112    }
113    return request;
114}
115
116} // namespace WebCore
117
118#endif // ENABLE(INDEXED_DATABASE)
119