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 #ifndef IDBAny_h

    27 #define IDBAny_h

    28 

    29 #if ENABLE(INDEXED_DATABASE)

    30 

    31 #include <wtf/PassRefPtr.h>

    32 #include <wtf/RefCounted.h>

    33 #include <wtf/RefPtr.h>

    34 

    35 namespace WebCore {

    36 

    37 class IDBDatabaseRequest;

    38 class IDBIndexRequest;

    39 class IDBKey;

    40 class IDBObjectStoreRequest;

    41 class IndexedDatabaseRequest;

    42 class SerializedScriptValue;

    43 

    44 class IDBAny : public RefCounted<IDBAny> {

    45 public:

    46     static PassRefPtr<IDBAny> create();

    47     template<typename T>

    48     static PassRefPtr<IDBAny> create(T* idbObject)

    49     {

    50         RefPtr<IDBAny> any = IDBAny::create();

    51         any->set(idbObject);

    52         return any.release();

    53     }

    54     ~IDBAny();

    55 

    56     enum Type {

    57         UndefinedType = 0,

    58         NullType,

    59         IDBDatabaseRequestType,

    60         IDBIndexRequestType,

    61         IDBKeyType,

    62         IDBObjectStoreRequestType,

    63         IndexedDatabaseRequestType,

    64         SerializedScriptValueType

    65     };

    66 

    67     Type type() const { return m_type; }

    68     // Use type() to figure out which one of these you're allowed to call.

    69     PassRefPtr<IDBDatabaseRequest> idbDatabaseRequest();

    70     PassRefPtr<IDBIndexRequest> idbIndexRequest();

    71     PassRefPtr<IDBKey> idbKey();

    72     PassRefPtr<IDBObjectStoreRequest> idbObjectStoreRequest();

    73     PassRefPtr<IndexedDatabaseRequest> indexedDatabaseRequest();

    74     PassRefPtr<SerializedScriptValue> serializedScriptValue();

    75 

    76     // Set can only be called once.

    77     void set(); // For "null".

    78     void set(PassRefPtr<IDBDatabaseRequest>);

    79     void set(PassRefPtr<IDBIndexRequest>);

    80     void set(PassRefPtr<IDBKey>);

    81     void set(PassRefPtr<IDBObjectStoreRequest>);

    82     void set(PassRefPtr<IndexedDatabaseRequest>);

    83     void set(PassRefPtr<SerializedScriptValue>);

    84 

    85 private:

    86     IDBAny();

    87 

    88     Type m_type;

    89 

    90     // Only one of the following should ever be in use at any given time.

    91     RefPtr<IDBDatabaseRequest> m_idbDatabaseRequest;

    92     RefPtr<IDBIndexRequest> m_idbIndexRequest;

    93     RefPtr<IDBKey> m_idbKey;

    94     RefPtr<IDBObjectStoreRequest> m_idbObjectStoreRequest;

    95     RefPtr<IndexedDatabaseRequest> m_indexedDatabaseRequest;

    96     RefPtr<SerializedScriptValue> m_serializedScriptValue;

    97 };

    98 

    99 } // namespace WebCore

   100 

   101 #endif // ENABLE(INDEXED_DATABASE)

   102 

   103 #endif // IDBAny_h