| [59] | 1 | // Copyright (C) 2012-2013 ChaosForge / Kornel Kisielewicz
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| 2 | // http://chaosforge.org/
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| 3 | //
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| 4 | // This file is part of NV Libraries.
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| 5 | // For conditions of distribution and use, see copyright notice in nv.hh
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| 6 |
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| 7 | /**
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| 8 | * @file uid.hh
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| 9 | * @author Kornel Kisielewicz
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| 10 | * @brief Implements a unique identifier class manager
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| 11 | */
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| 12 |
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| 13 | #ifndef NV_UID_HH
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| 14 | #define NV_UID_HH
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| 15 |
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| 16 | #include <nv/common.hh>
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| 17 | #include <unordered_map>
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| 18 |
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| 19 | namespace nv
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| 20 | {
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| 21 | class uid_store
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| 22 | {
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| 23 | public:
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| [110] | 24 |
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| 25 | /**
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| 26 | *Creates a new instance of the unique indentifer store.
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| 27 | */
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| [59] | 28 | uid_store();
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| [110] | 29 |
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| 30 | /**
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| 31 | *Gets the object with the specified ID.
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| 32 | *
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| 33 | *@param auid The ID to fetch.
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| 34 | *@returns The stored object for that ID.
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| 35 | */
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| [59] | 36 | object* get( uid auid ) const;
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| [110] | 37 |
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| 38 | /**
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| 39 | *Removes the object with the specified ID.
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| 40 | *
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| 41 | *@param auid The ID to remove.
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| 42 | *@returns True if the removal was successful, false if the ID didn't exist.
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| 43 | */
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| [59] | 44 | bool remove( uid auid );
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| [110] | 45 |
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| 46 | /**
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| 47 | *Adds an object to the store assigned to the indicated ID.
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| 48 | *
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| 49 | *@param o The object to add to the store.
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| 50 | *@param auid The ID to assign to the object.
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| 51 | */
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| [59] | 52 | void insert( object* o, uid auid );
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| [110] | 53 |
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| 54 | /**
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| 55 | *Adds an object to the store and assigns it a new ID.
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| 56 | *
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| 57 | *@param o The object to add to the store.
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| 58 | *@returns The ID the object was store under.
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| 59 | */
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| [59] | 60 | uid insert( object* o );
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| [110] | 61 |
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| 62 | /**
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| 63 | *Gets the next available ID.
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| 64 | *
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| 65 | *@returns The next ID in the store.
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| 66 | */
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| [59] | 67 | uid request_uid();
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| [110] | 68 |
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| 69 | /**
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| 70 | *Destroys the unique identifier store.
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| 71 | */
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| [59] | 72 | ~uid_store();
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| [110] | 73 |
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| 74 | /**
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| 75 | *Retrieves an object and casts it to the specified type.
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| 76 | *
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| 77 | *@tparam T The type to cast to.
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| 78 | *@param auid The ID the object is stored under.
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| 79 | *@returns An object of the indicated type that was stored at the indicated ID.
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| 80 | */
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| [59] | 81 | template< typename T >
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| 82 | T* get_as( uid auid ) const
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| 83 | {
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| 84 | return dynamic_cast< T* >( get(auid) );
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| 85 | }
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| 86 | private:
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| 87 | typedef std::unordered_map< uid, object* > map;
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| [110] | 88 | map m_map; ///< The hash map everything is stored in.
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| 89 | uid m_current; ///< The last UID assigned.
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| [59] | 90 | };
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| 91 | }
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| 92 |
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| 93 | #endif // NV_UID_HH
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