1 /* 2 * Copyright (C) 2010 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. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef ImmutableDictionary_h 27 #define ImmutableDictionary_h 28 29 #include "APIObject.h" 30 #include <wtf/HashMap.h> 31 #include <wtf/PassRefPtr.h> 32 #include <wtf/text/StringHash.h> 33 #include <wtf/text/WTFString.h> 34 35 namespace WebKit { 36 37 class ImmutableArray; 38 39 // ImmutableDictionary - An immutable dictionary type suitable for vending to an API. 40 41 class ImmutableDictionary : public APIObject { 42 public: 43 static const Type APIType = TypeDictionary; 44 45 typedef HashMap<String, RefPtr<APIObject> > MapType; 46 create()47 static PassRefPtr<ImmutableDictionary> create() 48 { 49 return adoptRef(new ImmutableDictionary); 50 } adopt(MapType & map)51 static PassRefPtr<ImmutableDictionary> adopt(MapType& map) 52 { 53 return adoptRef(new ImmutableDictionary(map)); 54 } 55 56 virtual ~ImmutableDictionary(); 57 isMutable()58 virtual bool isMutable() { return false; } 59 60 template<typename T> get(const String & key)61 T* get(const String& key) 62 { 63 RefPtr<APIObject> item = m_map.get(key); 64 if (!item) 65 return 0; 66 67 if (item->type() != T::APIType) 68 return 0; 69 70 return static_cast<T*>(item.get()); 71 } 72 get(const String & key)73 APIObject* get(const String& key) 74 { 75 return m_map.get(key).get(); 76 } 77 78 PassRefPtr<ImmutableArray> keys() const; 79 size()80 size_t size() { return m_map.size(); } 81 map()82 const MapType& map() { return m_map; } 83 84 protected: 85 ImmutableDictionary(); 86 ImmutableDictionary(MapType& map); 87 type()88 virtual Type type() const { return APIType; } 89 90 MapType m_map; 91 }; 92 93 } // namespace WebKit 94 95 #endif // ImmutableDictionary_h 96