This interface is implemented for all AAF persistent classes. More...

Public Member Functions
HRESULT	GetGeneration ([out] IAAFIdentification **ppGeneration)
	Gets the generation of this object, which is represented by an AAFIdentification object.
HRESULT	GetGenerationAUID ([out] aafUID_t *pResult)
	Shortcut to get the AUID representing the Identification representing this object's generation.
HRESULT	GetDefinition ([out] IAAFClassDef **ppClassDef)
	Returns the class definition which describes this object instance.
HRESULT	GetProperties ([out, retval] IEnumAAFProperties **ppEnum)
	Returns an enumerator across all properties actually contained in this object.
HRESULT	CountProperties ([out] aafUInt32 *pCount)
	Returns the number of properties currently present in this object.
HRESULT	GetPropertyValue ([in] IAAFPropertyDef pPropDef,[out] IAAFPropertyValue *ppPropVal)
	Returns the requested Property Value.
HRESULT	SetPropertyValue ([in] IAAFPropertyDef pPropDef,[in] IAAFPropertyValue pPropVal)
	Sets the value of the given property to the given value.
HRESULT	IsPropertyPresent ([in] IAAFPropertyDef pPropDef,[out] aafBoolean_t pResult)
	Sets *pResultReturns true in if named property is legal and is present; sets it to false if it is legal and is absent.
HRESULT	RemoveOptionalProperty ([in] IAAFPropertyDef *pPropDef)
	Removes the property if named property is legal and is optional and present.
HRESULT	CreateOptionalPropertyValue ([in] IAAFPropertyDef pPropDef,[out] IAAFPropertyValue *ppPropVal)
	Returns the requested Property Value.
HRESULT	GetDictionary ([out, retval] IAAFDictionary **ppDictionary)
	Returns the dictionary for this object instance.
HRESULT	EnableGenerationTracking ()
	Calling this method will cause generation tracking to be enabled for this object.
HRESULT	DisableGenerationTracking ()
	Calling this method will cause generation tracking to be disabled for this object.
HRESULT	IsGenerationTracked ([out] aafBoolean_t *pResult)
	This method will set *pResult to AAFTrue if generations are being tracked for this object.

Detailed Description

This interface is implemented for all AAF persistent classes.

In addition to methods which all clients can use, it provides methods for direct property access which should not be used unless the client programmer is aware of the liabilities.

In addition to the specific error results listed for each method, all methods in this interface may also return one of the following values:

AAFRESULT_NOMEMORY

insufficient system memory is available to perform the operation.

AAFRESULT_NOT_INITIALIZED

This object has not yet had Initialize() called on it through this object's primary interface. Note that IAAFObject is a primary interface for an abstract class, so it is not appropriate for the Initialize() method to exist in this interface. The Initialize() method is available through the concrete object's primary interface.

Definition at line 16501 of file AAF.idl.

Member Function Documentation

HRESULT IAAFObject::CountProperties ( [out] aafUInt32 * pCount )

Returns the number of properties currently present in this object.

This is the same number as will be accessed through GetProperties().

Note! This is a low-level method which allows direct access to properties. If such access is done, any semantic checking (such as that which is performed in all other named property Get/Set methods) is not done here. Users must use this method at their own risk.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

pCount arg is NULL.

Parameters:

pCount [out] count of properties present in this object

HRESULT IAAFObject::CreateOptionalPropertyValue	(	[in] IAAFPropertyDef *	pPropDef,
		[out] IAAFPropertyValue **	ppPropVal
	)

Returns the requested Property Value.

The desired property data is identified by the given optional property definition.

Note! This is a low-level method which allows direct access to properties. If such access is done, any semantic checking (such as that which is performed in all other named property Get/Set methods) is not done here. Users must use this method at their own risk.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

pPropDef or ppPropVal arg is NULL.

AAFRESULT_ILLEGAL_PROPERTY

named property illegal for this object's class.

AAFRESULT_PROP_ALREADY_PRESENT

named property is optional, but already present in this class.

Parameters:

pPropDef	[in] property definition indentifying desired property
ppPropVal	[out] returned AAFPropertyValue

HRESULT IAAFObject::DisableGenerationTracking ( )

Calling this method will cause generation tracking to be disabled for this object.

Generation information will then not be available through the GetGeneration() and GetGenerationAUID() methods.

Calling the EnableGenerationTracking() method will enable generation tracking for this object.

Generation tracking is disabled by default.

This method always succeeds, even if generation tracking is already disbled.

This method will return the following result:

AAFRESULT_SUCCESS

HRESULT IAAFObject::EnableGenerationTracking ( )

Calling this method will cause generation tracking to be enabled for this object.

Generation information will then be available through the GetGeneration() and GetGenerationAUID() methods.

Calling the DisableGenerationTracking() method will disable generation tracking for this object.

Generation tracking is disabled by default.

This method always succeeds, even if generation tracking is already enabled.

This method will return the following result:

AAFRESULT_SUCCESS

HRESULT IAAFObject::GetDefinition ( [out] IAAFClassDef ** ppClassDef )

Returns the class definition which describes this object instance.

Succeeds if all of the following are true:

the given ppClassDef pointer is valid.

Note! Use care when dealing with the object class. Among the pitfalls to be avoided is that tests for equality will not reflect inheritance. This becomes important if an unknown non-builtin (that is, user defined) object class ID is obtained.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

ppClassDef arg is NULL.

Parameters:

ppClassDef [out] class definition of which this object is an instance.

HRESULT IAAFObject::GetDictionary ( [out, retval] IAAFDictionary ** ppDictionary )

Returns the dictionary for this object instance.

Succeeds if all of the following are true:

the given ppDictionary pointer is valid.

Note! Use care when dealing with the object class. Among the pitfalls to be avoided is that tests for equality will not reflect inheritance. This becomes important if an unknown non-builtin (that is, user defined) object class ID is obtained.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

ppClassDef arg is NULL.

Parameters:

ppDictionary [out, retval] A pointer to an Dictionary pointer

HRESULT IAAFObject::GetGeneration ( [out] IAAFIdentification ** ppGeneration )

Gets the generation of this object, which is represented by an AAFIdentification object.

This is used to detect when an object has been modified.

This method will succeed if generation tracking is enabled for this object. Call EnableGenerationTrackint() and DisableGenerationTrackint() to control generation tracking for this object. Call IsGenerationTracked() to determine if generation tracking is currently enabled for this object.

Succeeds if all of the following are true:

the given pGeneration pointer is valid.
generation tracking is enabled for this object.
this object is attached to a file.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

ppGeneration arg is NULL.

AAFRESULT_INVALID_PARAM

Generation tracking is not enabled for this object.

AAFRESULT_OBJECT_NOT_ATTACHED

This object is not attached to a file from which generation information can be obtained..

Parameters:

ppGeneration [out] AAFIdentification object corresponding to this object's Generation ID

HRESULT IAAFObject::GetGenerationAUID ( [out] aafUID_t * pResult )

Shortcut to get the AUID representing the Identification representing this object's generation.

(Can also be obtained by calling this->GetGeneration(&pIdent), and using its result to call pIdent->GetAuid()).

This method will succeed if generation tracking is enabled for this object. Call EnableGenerationTrackint() and DisableGenerationTrackint() to control generation tracking for this object. Call IsGenerationTracked() to determine if generation tracking is currently enabled for this object.

Succeeds if all of the following are true:

the given pResult pointer is valid.
generation tracking is enabled for this object.
this object is attached to a file.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

pResult arg is NULL.

AAFRESULT_INVALID_PARAM

Generation tracking is not enabled for this object.

AAFRESULT_OBJECT_NOT_ATTACHED

This object is not attached to a file from which generation information can be obtained..

Parameters:

pResult [out] AUID corresponding to this object's Generation ID

HRESULT IAAFObject::GetProperties ( [out, retval] IEnumAAFProperties ** ppEnum )

Returns an enumerator across all properties actually contained in this object.

Each property is represented by an IAAFProperty interface.

ppEnum is AddRef()ed before it is returned. Succeeds if all of the following are true:

the ppEnum pointer is valid.

If this method fails nothing will be written to *ppEnum.

Note! This is a low-level method which allows direct access to properties. If such access is done, any semantic checking (such as that which is performed in all other named property Get/Set methods) is not done here. Users must use this method at their own risk.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

ppEnum arg is NULL.

Parameters:

ppEnum [out, retval] Property Enumeration

HRESULT IAAFObject::GetPropertyValue	(	[in] IAAFPropertyDef *	pPropDef,
		[out] IAAFPropertyValue **	ppPropVal
	)

Returns the requested Property Value.

The desired property data is identified by the given property definition.

Note! This is a low-level method which allows direct access to properties. If such access is done, any semantic checking (such as that which is performed in all other named property Get/Set methods) is not done here. Users must use this method at their own risk.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

pPropDef or ppPropVal arg is NULL.

AAFRESULT_ILLEGAL_PROPERTY

named property illegal for this object's class.

AAFRESULT_PROP_NOT_PRESENT

named property is optional, but not present in this class.

Parameters:

pPropDef	[in] property definition indentifying desired property
ppPropVal	[out] returned AAFPropertyValue

HRESULT IAAFObject::IsGenerationTracked ( [out] aafBoolean_t * pResult )

This method will set *pResult to AAFTrue if generations are being tracked for this object.

A result of AAFTrue indicates that generation information will be available through the GetGeneration() and GetGenerationAUID() methods.

Calling the EnableGenerationTracking() method will enable generation tracking for this object; calling the DisableGenerationTracking() method will disable generation tracking for this object.

Generation tracking is disabled by default.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

pResult arg is NULL.

Parameters:

pResult [out] set to true if generations are tracked; false otherwise

HRESULT IAAFObject::IsPropertyPresent	(	[in] IAAFPropertyDef *	pPropDef,
		[out] aafBoolean_t *	pResult
	)

Sets *pResultReturns true in if named property is legal and is present; sets it to false if it is legal and is absent.

Note! This is a low-level method which allows direct access to properties. If such access is done, any semantic checking (such as that which is performed in all other named property Get/Set methods) is not done here. Users must use this method at their own risk.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

pResult arg is NULL.

AAFRESULT_ILLEGAL_PROPERTY

named property illegal for this object's class.

Parameters:

pPropDef	[in] property definition indentifying desired property
pResult	[out] true if present; false if not present

HRESULT IAAFObject::RemoveOptionalProperty ( [in] IAAFPropertyDef * pPropDef )

Removes the property if named property is legal and is optional and present.

Note! This is a low-level method which allows direct access to properties. If such access is done, any semantic checking (such as that which is performed in all other named property Get/Set methods) is not done here. Users must use this method at their own risk.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

pResult arg is NULL.

AAFRESULT_ILLEGAL_PROPERTY

named property illegal for this object's class.

Parameters:

pPropDef [in] property definition indentifying desired property

HRESULT IAAFObject::SetPropertyValue	(	[in] IAAFPropertyDef *	pPropDef,
		[in] IAAFPropertyValue *	pPropVal
	)

Sets the value of the given property to the given value.

If the selected property is optional but not yet present, will make the property present before setting its value.

Note! This is a low-level method which allows direct access to properties. If such access is done, any semantic checking (such as that which is performed in all other named property Get/Set methods) is not done here. Users must use this method at their own risk.

This method will return the following codes. If more than one of the listed errors is in effect, it will return the first one encountered in the order given below:

AAFRESULT_SUCCESS

succeeded. (This is the only code indicating success.)

AAFRESULT_NULL_PARAM

pPropDef or ppPropVal arg is NULL.

AAFRESULT_ILLEGAL_PROPERTY

named property illegal for this object's class.

AAFRESULT_PROP_NOT_PRESENT

named property is optional, but not present in this class.

Parameters:

pPropDef	[in] property definition indentifying desired property
pPropVal	[in] value to set.

Public Member Functions

Detailed Description

Member Function Documentation