1/*
2 * Copyright (C) 2012 Apple 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 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef DatabaseManager_h
27#define DatabaseManager_h
28
29#include "modules/webdatabase/DatabaseContext.h"
30#include "modules/webdatabase/DatabaseError.h"
31#include "platform/heap/Handle.h"
32#include "wtf/Assertions.h"
33#include "wtf/Forward.h"
34#include "wtf/HashMap.h"
35#include "wtf/PassRefPtr.h"
36
37namespace blink {
38
39class Database;
40class DatabaseCallback;
41class DatabaseContext;
42class ExceptionState;
43class SecurityOrigin;
44class ExecutionContext;
45
46class DatabaseManager {
47    WTF_MAKE_NONCOPYABLE(DatabaseManager); WTF_MAKE_FAST_ALLOCATED;
48public:
49    static DatabaseManager& manager();
50
51    // These 2 methods are for DatabaseContext (un)registration, and should only
52    // be called by the DatabaseContext constructor and destructor.
53    void registerDatabaseContext(DatabaseContext*);
54    void unregisterDatabaseContext(DatabaseContext*);
55
56#if ENABLE(ASSERT)
57    void didConstructDatabaseContext();
58    void didDestructDatabaseContext();
59#else
60    void didConstructDatabaseContext() { }
61    void didDestructDatabaseContext() { }
62#endif
63
64    static void throwExceptionForDatabaseError(DatabaseError, const String& errorMessage, ExceptionState&);
65
66    PassRefPtrWillBeRawPtr<Database> openDatabase(ExecutionContext*, const String& name, const String& expectedVersion, const String& displayName, unsigned long estimatedSize, DatabaseCallback*, DatabaseError&, String& errorMessage);
67
68    String fullPathForDatabase(SecurityOrigin*, const String& name, bool createIfDoesNotExist = true);
69
70private:
71    DatabaseManager();
72    ~DatabaseManager();
73
74    // This gets a DatabaseContext for the specified ExecutionContext.
75    // If one doesn't already exist, it will create a new one.
76    DatabaseContext* databaseContextFor(ExecutionContext*);
77    // This gets a DatabaseContext for the specified ExecutionContext if
78    // it already exist previously. Otherwise, it returns 0.
79    DatabaseContext* existingDatabaseContextFor(ExecutionContext*);
80
81    PassRefPtrWillBeRawPtr<Database> openDatabaseInternal(ExecutionContext*,
82        const String& name, const String& expectedVersion, const String& displayName,
83        unsigned long estimatedSize, bool setVersionInNewDatabase, DatabaseError&, String& errorMessage);
84
85    static void logErrorMessage(ExecutionContext*, const String& message);
86
87    typedef WillBePersistentHeapHashMap<ExecutionContext*, RefPtrWillBeMember<DatabaseContext> > ContextMap;
88    ContextMap m_contextMap;
89#if ENABLE(ASSERT)
90    int m_databaseContextRegisteredCount;
91    int m_databaseContextInstanceCount;
92#endif
93};
94
95} // namespace blink
96
97#endif // DatabaseManager_h
98