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26 #ifndef ImmutableDictionary_h
27 #define ImmutableDictionary_h
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>
39 // ImmutableDictionary - An immutable dictionary type suitable for vending to an API.
41 class ImmutableDictionary : public APIObject {
43 static const Type APIType = TypeDictionary;
45 typedef HashMap<String, RefPtr<APIObject> > MapType;
47 static PassRefPtr<ImmutableDictionary> create()
49 return adoptRef(new ImmutableDictionary);
51 static PassRefPtr<ImmutableDictionary> adopt(MapType& map)
53 return adoptRef(new ImmutableDictionary(map));
56 virtual ~ImmutableDictionary();
58 virtual bool isMutable() { return false; }
61 T* get(const String& key)
63 RefPtr<APIObject> item = m_map.get(key);
67 if (item->type() != T::APIType)
70 return static_cast<T*>(item.get());
73 APIObject* get(const String& key)
75 return m_map.get(key).get();
78 PassRefPtr<ImmutableArray> keys() const;
80 size_t size() { return m_map.size(); }
82 const MapType& map() { return m_map; }
85 ImmutableDictionary();
86 ImmutableDictionary(MapType& map);
88 virtual Type type() const { return APIType; }
95 #endif // ImmutableDictionary_h