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