diff -r 000000000000 -r 4f2f89ce4247 WebCore/storage/IDBAny.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/storage/IDBAny.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2010 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef IDBAny_h
+#define IDBAny_h
+
+#if ENABLE(INDEXED_DATABASE)
+
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+#include <wtf/RefPtr.h>
+
+namespace WebCore {
+
+class IDBDatabaseRequest;
+class IDBIndexRequest;
+class IDBKey;
+class IDBObjectStoreRequest;
+class IndexedDatabaseRequest;
+class SerializedScriptValue;
+
+class IDBAny : public RefCounted<IDBAny> {
+public:
+    static PassRefPtr<IDBAny> create();
+    template<typename T>
+    static PassRefPtr<IDBAny> create(T* idbObject)
+    {
+        RefPtr<IDBAny> any = IDBAny::create();
+        any->set(idbObject);
+        return any.release();
+    }
+    ~IDBAny();
+
+    enum Type {
+        UndefinedType = 0,
+        NullType,
+        IDBDatabaseRequestType,
+        IDBIndexRequestType,
+        IDBKeyType,
+        IDBObjectStoreRequestType,
+        IndexedDatabaseRequestType,
+        SerializedScriptValueType
+    };
+
+    Type type() const { return m_type; }
+    // Use type() to figure out which one of these you're allowed to call.
+    PassRefPtr<IDBDatabaseRequest> idbDatabaseRequest();
+    PassRefPtr<IDBIndexRequest> idbIndexRequest();
+    PassRefPtr<IDBKey> idbKey();
+    PassRefPtr<IDBObjectStoreRequest> idbObjectStoreRequest();
+    PassRefPtr<IndexedDatabaseRequest> indexedDatabaseRequest();
+    PassRefPtr<SerializedScriptValue> serializedScriptValue();
+
+    // Set can only be called once.
+    void set(); // For "null".
+    void set(PassRefPtr<IDBDatabaseRequest>);
+    void set(PassRefPtr<IDBIndexRequest>);
+    void set(PassRefPtr<IDBKey>);
+    void set(PassRefPtr<IDBObjectStoreRequest>);
+    void set(PassRefPtr<IndexedDatabaseRequest>);
+    void set(PassRefPtr<SerializedScriptValue>);
+
+private:
+    IDBAny();
+
+    Type m_type;
+
+    // Only one of the following should ever be in use at any given time.
+    RefPtr<IDBDatabaseRequest> m_idbDatabaseRequest;
+    RefPtr<IDBIndexRequest> m_idbIndexRequest;
+    RefPtr<IDBKey> m_idbKey;
+    RefPtr<IDBObjectStoreRequest> m_idbObjectStoreRequest;
+    RefPtr<IndexedDatabaseRequest> m_indexedDatabaseRequest;
+    RefPtr<SerializedScriptValue> m_serializedScriptValue;
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(INDEXED_DATABASE)
+
+#endif // IDBAny_h