/* * Copyright (C) 2010 Apple 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 INC. 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 INC. 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 ImmutableDictionary_h #define ImmutableDictionary_h #include "APIObject.h" #include <wtf/HashMap.h> #include <wtf/PassRefPtr.h> #include <wtf/text/StringHash.h> #include <wtf/text/WTFString.h> namespace API { class Array; } namespace WebKit { // ImmutableDictionary - An immutable dictionary type suitable for vending to an API. class ImmutableDictionary : public API::ObjectImpl<API::Object::Type::Dictionary> { public: typedef HashMap<String, RefPtr<API::Object>> MapType; static RefPtr<ImmutableDictionary> create(); static RefPtr<ImmutableDictionary> create(MapType); virtual ~ImmutableDictionary(); virtual bool isMutable() { return false; } template<typename T> T* get(const String& key) const { RefPtr<API::Object> item = m_map.get(key); if (!item) return 0; if (item->type() != T::APIType) return 0; return static_cast<T*>(item.get()); } API::Object* get(const String& key) const { return m_map.get(key); } API::Object* get(const String& key, bool& exists) const { auto it = m_map.find(key); exists = it != m_map.end(); return it->value.get(); } PassRefPtr<API::Array> keys() const; size_t size() const { return m_map.size(); } const MapType& map() const { return m_map; } protected: explicit ImmutableDictionary(MapType); MapType m_map; }; } // namespace WebKit #endif // ImmutableDictionary_h