# Parameters

- first citizen class
- must be serializable

## Types

### CFParameter

#### Operations

Method *CheckClass* Virtual added for Fixed Size parameter support.

Method *GetCFContext* Returns a pointer to the owner CFContext

Method *GetClassID* Returns the Class Identifier for this object.

Method *GetID* Returns the Identifier for this object.

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Method *GetMemoryOccupation* Returns the size taken by this object and its data in memory. 

#### Owner

Method *GetOwner* Gets the owner of the output parameter.

Virtual *Method* SetOwner Sets the owner of the output parameter.

#### Parameter Type 

Method *GetGUID* Gets the GUID of the parameter type.

Method *GetParameterClassID* Gets the Class ID of the parameter type.

Method *GetType* Gets the parameter type.

Method *IsCompatibleWith* Checks whether given parameter is compatible with current parameter type.

Method *SetType*  Changes the parameter type.

#### IO

Virtual Method *CopyValue* Copies the content of a parameter to this parameter.

Method *GetDataSize* Gets the size of the data stored by the parameter.

Virtual Method *GetReadDataPtr* Returns a pointer to the data.

Virtual Method *GetStringValue Gets the string representation of the parameter value.

Virtual Method *GetValue* Gets the value of the parameter.

Virtual Method *GetWriteDataPtr* Returns a pointer to the data.

Virtual Method *SetStringValue* Sets the value of the parameter using a string.

Virtual Method *SetValue* Sets the value of the parameter.

### CFParameterIn

Method *GetDirectSource* Returns the direct source of the input parameter.

Method *GetRealSource* Returns the real source of data of the input parameter

Method *GetSharedSource* returns the shared source of the input parameter.

Method *GetType* Returns the type of the input parameter.

Method *GetValue* Copies the input parameter's value into the given buffer.

Method *SetDirectSource* Sets the new direct source for the input parameter.

Method *ShareSourceWith* Shares the CFParameterIn with another one.

### CFParameterOut

Virtual Method *DataChanged* Forces the propagation of the data down the destination chain.
 
Method *GetDestination* Returns the Nth destination parameter.

Method *GetDestinationCount* Returns number of destination parameters.

Method *GetWriteDataPtr* Returns a pointer to the data.

### CFParameter­Operation

Method *DoOperation* Forces the execution of an operation.

Method *GetInParameter1* Accessing the first input parameter of the operation.

Method *GetInParameter2* Accessing the second input parameter of the operation.

Method *GetInParameterRest* Accessing the rest.

Method *GetOperationGuid* Returns the GUID of the operation.

Method *GetOutParameter* Accessing the output parameter of the operation.

Method *Reconstruct* Reconstructs the operation.