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 35namespace WebKit { 36 37class ImmutableArray; 38 39// ImmutableDictionary - An immutable dictionary type suitable for vending to an API. 40 41class ImmutableDictionary : public TypedAPIObject<APIObject::TypeDictionary> { 42public: 43 typedef HashMap<String, RefPtr<APIObject>> MapType; 44 45 static PassRefPtr<ImmutableDictionary> create() 46 { 47 return adoptRef(new ImmutableDictionary); 48 } 49 static PassRefPtr<ImmutableDictionary> adopt(MapType& map) 50 { 51 return adoptRef(new ImmutableDictionary(map)); 52 } 53 54 virtual ~ImmutableDictionary(); 55 56 virtual bool isMutable() { return false; } 57 58 template<typename T> 59 T* get(const String& key) 60 { 61 RefPtr<APIObject> item = m_map.get(key); 62 if (!item) 63 return 0; 64 65 if (item->type() != T::APIType) 66 return 0; 67 68 return static_cast<T*>(item.get()); 69 } 70 71 APIObject* get(const String& key) 72 { 73 return m_map.get(key); 74 } 75 76 PassRefPtr<ImmutableArray> keys() const; 77 78 size_t size() { return m_map.size(); } 79 80 const MapType& map() { return m_map; } 81 82protected: 83 ImmutableDictionary(); 84 ImmutableDictionary(MapType& map); 85 86 MapType m_map; 87}; 88 89} // namespace WebKit 90 91#endif // ImmutableDictionary_h 92