ashd.fsm.systemInstanceProvider source code

1 /**
2  * This System provider always returns the same instance of the component. The system
3  * is passed to the provider at initialisation.
4  */
5 module ashd.fsm.systemInstanceProvider;
6 
7 
8 import ashd.core.system        : System;
9 import ashd.fsm.ISystemProvider: ISystemProvider;
10 
11 
12 public class SystemInstanceProvider(T): ISystemProvider
13 {
14     private
15     {
16         T   mInstance;
17         int mSystemPriority;
18     }
19 
20     /**
21      * Constructor
22      *
23      * @param instance The instance to return whenever a System is requested.
24      */
25     public this ( T instance_a )
26     {
27         mInstance = instance_a;
28     }
29 
30     /**
31      * Used to request a component from this provider
32      *
33      * @return The instance of the System
34      */
35     protected Object createDynamicInstance( ClassInfo type_a ){ return mInstance; }
36 
37 
38     @property
39     {
40         /**
41          * Used to compare this provider with others. Any provider that returns the same component
42          * instance will be regarded as equivalent.
43          *
44          * @return The instance
45          */
46         public hash_t identifier()
47         {
48             return mInstance.toHash();
49         }
50 
51         /**
52          * The priority at which the System should be added to the Engine
53          */
54         public int  priority() { return mSystemPriority; }
55         public void priority( int value_a ) { mSystemPriority = value_a; }
56 
57     }
58 }