| 40 |
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| 41 |
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//forward declaration |
| 42 |
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class ForceField; |
| 43 |
< |
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| 43 |
> |
class ForceFieldCreator; |
| 44 |
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/** |
| 45 |
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* @class ForceFieldFactory ForceFieldFactory.hpp "UseTheForce/ForceFieldFactory.hpp" |
| 46 |
|
* Factory pattern and Singleton Pattern are used to define an interface for creating an ForceField. |
| 47 |
|
*/ |
| 48 |
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class ForceFieldFactory { |
| 49 |
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public: |
| 50 |
< |
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| 51 |
< |
/** a function pointer which has not parameter and return a pointer pointer to a ForceField instance*/ |
| 52 |
< |
typedef ForceField* (*ForceFieldCreatorType)(); |
| 53 |
< |
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| 54 |
< |
typedef std::map<std::string, ForceFieldCreatorType> CreatorMapType; |
| 50 |
> |
|
| 51 |
> |
typedef std::map<std::string, ForceFieldCreator*> CreatorMapType; |
| 52 |
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typedef std::vector<std::string> IdentVectorType; |
| 53 |
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typedef std::vector<std::string>::iterator IdentVectorIterator; |
| 54 |
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|
| 56 |
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* Returns an instance of ForceField factory |
| 57 |
|
* @return an instance of ForceField factory |
| 58 |
|
*/ |
| 59 |
< |
static ForceFieldFactory* getInstance(); |
| 59 |
> |
static ForceFieldFactory* getInstance() { |
| 60 |
|
|
| 61 |
+ |
if (instance_ == NULL) { |
| 62 |
+ |
instance_ = new ForceFieldFactory(); |
| 63 |
+ |
} |
| 64 |
+ |
return instance_; |
| 65 |
+ |
|
| 66 |
+ |
} |
| 67 |
+ |
|
| 68 |
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/** |
| 69 |
|
* Registers a creator with a type identifier |
| 70 |
|
* @return true if registration is succeed, otherwise return false |
| 71 |
|
* @id the identification of the concrete object |
| 72 |
|
* @creator the object responsible to create the concrete object |
| 73 |
|
*/ |
| 74 |
< |
bool registerForceField(const std::string& id, ForceFieldCreatorType creator); |
| 74 |
> |
bool registerForceField(ForceFieldCreator* creator); |
| 75 |
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|
| 76 |
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/** |
| 77 |
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* Unregisters the creator for the given type identifier. If the type identifier |
