WebCore/storage/StorageMap.h

   1 /*
   2  * Copyright (C) 2008 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 StorageMap_h
  27 #define StorageMap_h
  28
  29 #include "PlatformString.h"
  30 #include "StringHash.h"
  31
  32 #include <wtf/HashMap.h>
  33 #include <wtf/PassRefPtr.h>
  34 #include <wtf/RefCounted.h>
  35
  36 namespace WebCore {
  37
  38     class StorageMap : public RefCounted<StorageMap> {
  39     public:
  40         static PassRefPtr<StorageMap> create();
  41
  42         unsigned length() const;
  43         bool key(unsigned index, String& key) const;
  44         String getItem(const String&) const;
  45         PassRefPtr<StorageMap> setItem(const String& key, const String& value, String& oldValue);
  46         PassRefPtr<StorageMap> removeItem(const String&, String& oldValue);
  47
  48         bool contains(const String& key) const;
  49
  50         void importItem(const String& key, const String& value) const;
  51
  52     private:
  53         StorageMap();
  54         PassRefPtr<StorageMap> copy();
  55         void invalidateIterator();
  56         void setIteratorToIndex(unsigned) const;
  57
  58         mutable HashMap<String, String> m_map;
  59         mutable HashMap<String, String>::iterator m_iterator;
  60         mutable unsigned m_iteratorIndex;
  61     };
  62
  63 } // namespace WebCore
  64
  65 #endif // StorageMap_h