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# MDataHandle Class Reference
OpenMaya - API module for common classes

This reference page is linked to from the following overview topics: デフォーマ ノードの例, スレッド化と Maya.

Search for all occurrences

## Detailed Description

Data handle for information contained in a data block.

An MDataHandle is a smart pointer into a data block (MDataBlock). A data handle corresponds to the data for a particular attribute or plug. For array data (eg CVs of a curve) use an MArrayDataHandle. To get a data handle, request it from the data block.

Some simple numeric data is handled directly by the dependency graph. If the data is more complicated (eg surface geometry), then the data handle can supply a pointer that should be given to the appropriate data function set.

MDataHandle allows the manipulation and setting of generic attributes as created by the MFnGenericAttribute class. It is possible to create numeric generic attributes using two scenarios. A plug-in may request that the generic attribute support singleton types such as MFnNumericData::kFloat or kChar. Or a plug-in may request array types such as MFnNumericData::k2Float k2Double. In the singleton case, getting and setting the attribute using MDataHandle is done with the asGeneric*() or setGeneric*() methods. In the case of the array types, the MDataHandle.data() method can be used to retrieve the MObject for the attribute and to initialize the MFnNumericData function set. A call to MDataHandle::setData() on the updated attribute must be made to pass the information back to Maya. NOTE: It is not possible to distinguish the singleton generic types from one another. There is no method that can be called to return if the singleton generic attribute is a float, char etc.

MDataHandle methods cannot be assumed to be threadsafe.

Examples:

  affectsNode.cpp, animCubeNode.cpp, anisotropicShader.cpp, apiMeshCreator.cpp, apiMeshShape.cpp, apiMeshShape.h, arcLenNode.cpp, backfillShader.cpp, blindDataMesh.cpp, blindDataShader.cpp, brickShader.cpp, buildRotationNode.cpp, cellShader.cpp, cgfxShaderNode.cpp, cgfxShaderNode.h, cgfxVector.cpp, checkerShader.cpp, circleNode.cpp, clearcoat.cpp, closestPointOnCurveNode.cpp, compositingShader.cpp, contrastShader.cpp, customImagePlane.cpp, cvColorNode.cpp, cvColorShader.cpp, depthShader.cpp, displacementShader.cpp, dynExprField.cpp, flameShader.cpp, fullLoftNode.cpp, gammaShader.cpp, genericAttributeNode.cpp, geometrySurfaceConstraint.cpp, geomShader.cpp, GLSLShaderNode.cpp, GLSLShaderNode.h, hlslShader.cpp, hlslShader.h, hwColorPerVertexShader.cpp, hwDecalBumpShader_NV20.cpp, hwPhongShader.cpp, hwPhongShader.h, hwReflectBumpShader_NV20.cpp, hwRefractReflectShader_NV20.cpp, hwToonShader_NV20.cpp, hwUnlitShader.cpp, interpShader.cpp, jitterNode.cpp, lambertShader.cpp, latticeNoiseNode.cpp, lavaShader.cpp, lightShader.cpp, meshOpNode.cpp, mixtureShader.cpp, multiCurveNode.cpp, noiseShader.cpp, offsetNode.cpp, ownerEmitter.cpp, ownerEmitter.h, phongShader.cpp, pnTrianglesNode.cpp, pnTrianglesNode.h, pointOnMeshInfoNode.cpp, pointOnSubdNode.cpp, quadricShape.cpp, renderAccessNode.cpp, rockingTransform.cpp, rockingTransform.h, rockingTransformCheck.cpp, shadowMatteShader.cpp, shellNode.cpp, shiftNode.cpp, simpleEmitter.cpp, simpleEmitter.h, simpleFluidEmitter.cpp, simpleLoftNode.cpp, simpleSpring.h, sineNode.cpp, slopeShaderNode.cpp, solidCheckerShader.cpp, splitUVNode.cpp, stringFormatNode.cpp, sweptEmitter.cpp, sweptEmitter.h, testNobjectNode.cpp, torusField.cpp, torusField.h, transCircleNode.cpp, volumeShader.cpp, weightListNode.cpp, and yTwistNode.cpp.

`#include <MDataHandle.h>`

List of all members.

## Public Member Functions
| MDataHandle ()
| Constructor for MDataHandle.
bool | isNumeric () const
| Returns true if this handle is for simple numeric data.
bool | isGeneric (bool &isNumeric, bool &isNull) const
| Returns true if this handle is for generic data.
MFnNumericData::Type | numericType () const
| Returns the type of data represented by this handle.
MFnData::Type | type () const
| Returns the type of data represented by this handle.
MTypeId | typeId () const
| Returns the type of data represented by this handle as a type id.
MStatus | acceptedTypeIds (MUintArray &) const
| This method returns an array of MTypeId ids that the data handle can accept.
MObject | data ()
| Returns the data object from this handle.
MStatus | copy (const MDataHandle &src)
| Copies the attribute from the src attribute to the attribute referenced by this handle.
void | setClean ()
| Marks the data that is represented by this handle as being clean.
bool & | asBool () const
| Returns the data represented by this handle in the data block.
char & | asChar () const
| Returns the data represented by this handle in the data block.
unsigned char & | asUChar () const
| Returns the data represented by this handle in the data block.
short & | asShort () const
| Returns the data represented by this handle in the data block.
int & | asLong () const
| This method is obsolete.
int & | asInt () const
| Returns the data represented by this handle in the data block.
void *& | asAddr () const
| Returns the data represented by this handle in the data block.
float & | asFloat () const
| Returns the data represented by this handle in the data block.
double & | asDouble () const
| Returns the data represented by this handle in the data block.
MDistance | asDistance () const
| Returns the data represented by this handle in the data block.
MAngle | asAngle () const
| Returns the data represented by this handle in the data block.
MTime | asTime () const
| Returns the data represented by this handle in the data block.
short2 & | asShort2 () const
| Returns the data represented by this handle in the data block.
long2 & | asLong2 () const
| This method is obsolete.
int2 & | asInt2 () const
| Returns the data represented by this handle in the data block.
float2 & | asFloat2 () const
| Returns the data represented by this handle in the data block.
double2 & | asDouble2 () const
| Returns the data represented by this handle in the data block.
short3 & | asShort3 () const
| Returns the data represented by this handle in the data block.
long3 & | asLong3 () const
| This method is obsolete.
int3 & | asInt3 () const
| Returns the data represented by this handle in the data block.
float3 & | asFloat3 () const
| Returns the data represented by this handle in the data block.
double3 & | asDouble3 () const
| Returns the data represented by this handle in the data block.
MVector & | asVector () const
| Returns the data represented by this handle in the data block.
MFloatVector & | asFloatVector () const
| Returns the data represented by this handle in the data block.
MMatrix & | asMatrix () const
| Returns the data represented by this handle in the data block.
MFloatMatrix & | asFloatMatrix () const
| Returns the data represented by this handle in the data block.
MString & | asString () const
| Returns the data represented by this handle in the data block.
MObject | asNurbsCurve () const
| Returns the data represented by this handle in the data block.
MObject | asNurbsSurface () const
| Returns the data represented by this handle in the data block.
MObject | asMesh () const
| Returns the data represented by this handle in the data block.
MObject | asSubdSurface () const
| Returns the data represented by this handle in the data block.
MObject | asNurbsCurveTransformed () const
| Returns the data represented by this handle in the data block.
MObject | asNurbsSurfaceTransformed () const
| Returns the data represented by this handle in the data block.
MObject | asMeshTransformed () const
| Returns the data represented by this handle in the data block.
MObject | asSubdSurfaceTransformed () const
| Returns the data represented by this handle in the data block.
const MMatrix & | geometryTransformMatrix () const
| This method returns a reference to the local-to-world transformation matrix that can accompany a geometry data object.
MPxData * | asPluginData () const
| Returns the data represented by this handle in the data block.
void | set (bool)
| No script support.
void | set (char)
| No script support.
void | set (short)
| No script support.
void | set (int)
| No script support.
void | set (float)
| No script support.
void | set (double)
| No script support.
void | set (const MMatrix &)
| No script support.
void | set (const MFloatMatrix &)
| No script support.
void | set (const MVector &)
| No script support.
void | set (const MFloatVector &)
| No script support.
void | set (const MDistance &)
| No script support.
void | set (const MAngle &)
| No script support.
void | set (const MTime &)
| No script support.
void | set (short, short)
| No script support.
void | set (int, int)
| No script support.
void | set (float, float)
| No script support.
void | set (double, double)
| No script support.
void | set (short, short, short)
| No script support.
void | set (int, int, int)
| No script support.
void | set (float, float, float)
| No script support.
void | set (double, double, double)
| No script support.
void | set (const MString &)
| No script support.
MStatus | set (const MObject &data)
| No script support.
MStatus | set (MPxData *data)
| No script support.
void | setBool (bool)
| Set the data that this handle represents in the data block.
void | setChar (char)
| Set the data that this handle represents in the data block.
void | setShort (short)
| Set the data that this handle represents in the data block.
void | setInt (int)
| Set the data that this handle represents in the data block.
void | setFloat (float)
| Set the data that this handle represents in the data block.
void | setDouble (double)
| Set the data that this handle represents in the data block.
void | setMMatrix (const MMatrix &)
| Set the data that this handle represents in the data block.
void | setMFloatMatrix (const MFloatMatrix &)
| Set the data that this handle represents in the data block.
void | setMVector (const MVector &)
| Set the data that this handle represents in the data block.
void | setMFloatVector (const MFloatVector &)
| Set the data that this handle represents in the data block.
void | setMDistance (const MDistance &)
| Set the data that this handle represents in the data block.
void | setMAngle (const MAngle &)
| Set the data that this handle represents in the data block.
void | setMTime (const MTime &)
| Set the data that this handle represents in the data block.
void | set2Short (short, short)
| Set the data that this handle represents in the data block.
void | set2Int (int, int)
| Set the data that this handle represents in the data block.
void | set2Float (float, float)
| Set the data that this handle represents in the data block.
void | set2Double (double, double)
| Set the data that this handle represents in the data block.
void | set3Short (short, short, short)
| Set the data that this handle represents in the data block.
void | set3Int (int, int, int)
| Set the data that this handle represents in the data block.
void | set3Float (float, float, float)
| Set the data that this handle represents in the data block.
void | set3Double (double, double, double)
| Set the data that this handle represents in the data block.
void | setString (const MString &)
| Set the data that this handle represents in the data block.
MStatus | setMObject (const MObject &data)
| Set the data that this handle represents in the data block.
MStatus | setMPxData (MPxData *data)
| Set the data that this handle represents in the data block.
bool | asGenericBool () const
| Returns the generic data represented by this handle in the data block.
unsigned char | asGenericChar () const
| Returns the generic data represented by this handle in the data block.
double | asGenericDouble () const
| Returns the generic data represented by this handle in the data block.
float | asGenericFloat () const
| Returns the generic data represented by this handle in the data block.
short | asGenericShort () const
| Returns the generic data represented by this handle in the data block.
int | asGenericInt () const
| Returns the generic data represented by this handle in the data block.
void | setGenericBool (bool value, bool force)
| Set the data that this handle represents in the data block.
void | setGenericChar (unsigned char value, bool force)
| Set the data that this handle represents in the data block.
void | setGenericDouble (double value, bool force)
| Set the data that this handle represents in the data block.
void | setGenericFloat (float value, bool force)
| Set the data that this handle represents in the data block.
void | setGenericShort (short value, bool force)
| Set the data that this handle represents in the data block.
void | setGenericInt (int value, bool force)
| Set the data that this handle represents in the data block.
MDataHandle | child (const MPlug &plug)
| Get a handle to a child of this handle.
MDataHandle | child (const MObject &attribute)
| Get a handle to a child of this handle.
MDataHandle & | operator= (const MDataHandle &other)
| Assignment operator.
| MDataHandle (const MDataHandle &)
| Copy constructor.
## Static Public Member Functions
static const char * | className ()
| Returns the name of this class.
## Friends
class | MDataBlock Search for all occurrences
class | MArrayDataBuilder Search for all occurrences
class | MArrayDataHandle Search for all occurrences
class | MItGeometry Search for all occurrences

## Constructor & Destructor Documentation

MDataHandle | ( |  | ) |

Constructor for MDataHandle.

Typically, data handles will be obtained from the data block (MDataBlock). A user constructed MDataHandle should not be used until a valid data handle has been assigned to it (ie. using the assignment operator).

## Member Function Documentation

bool isNumeric | ( |  | ) | const

Search for all occurrences

Returns true if this handle is for simple numeric data.

That means that the numeric data is directly accessible through the non-generic as*() and set*() methods of this handle. For example, depending on handle initialization, the asBool() may be called but the asGenericBool() should not be called.

Returns:
  Whether this handle points to simple numeric data

bool isGeneric | ( | bool & | isNumeric,
|  | bool & | isNull
| ) |  | const

Search for all occurrences

Returns true if this handle is for generic data.

There are 2 forms of generic data. The first is for simple data and is used if the isNumeric parameter returns true. In this case, the asGeneric*() and setGeneric*() methods of this class are used to query and set values. The second form of generic data is for more complex attribute types. As a result the type of the object must be checked and an appropriate attribute function set initialized with the object.

Parameters:

  [out] | isNumeric | returns true if this handle is for simple generic numeric data
  [out] | isNull | returns true if this handle is not set

Returns:
  True will be returned if this handle points to a generic attribute

Examples:
  genericAttributeNode.cpp.

MFnNumericData::Type numericType | ( |  | ) | const

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Returns the type of data represented by this handle.

This method is only valid for data handles of simple numeric types.

Returns:
  The numeric type

MFnData::Type type | ( |  | ) | const

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Returns the type of data represented by this handle.

Returns:
  The data type

Examples:
  cgfxVector.cpp.

MTypeId typeId | ( |  | ) | const

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Returns the type of data represented by this handle as a type id.

A type id is a four character code that is used to identify the data type. If no data exists for this handle, the type id will be 0x0.

Returns:
  The data type

MStatus acceptedTypeIds | ( | MUintArray & | typids | ) | const

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This method returns an array of MTypeId ids that the data handle can accept.

The MTypeId can be reconstructed using the unsigned int in id.

Parameters:

  [out] | typids | an unsigned int array to copy the ids to

Returns:
  Status code

Status Codes:
  - MS::kSuccess The method was successful
  - MS::kFailure The method failed

MObject data | ( |  | ) |

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Returns the data object from this handle.

The object returned should be used with the appropriate data function set. This method is not valid for simple numeric types.

Returns:
  The data object

Examples:
  apiMeshShape.cpp, cgfxVector.cpp, cvColorNode.cpp, dynExprField.cpp, latticeNoiseNode.cpp, meshOpNode.cpp, ownerEmitter.cpp, particleAttrNode.cpp, simpleFluidEmitter.cpp, splitUVNode.cpp, sweptEmitter.cpp, testNobjectNode.cpp, testNucleusNode.cpp, and torusField.cpp.

MStatus copy | ( | const MDataHandle & | src | ) |

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Copies the attribute from the src attribute to the attribute referenced by this handle.

This is the only method which can completely copy a compound attribute from one handle to another. The construct outputHandle.set (inputHandle.data()) will not work for compound or multi attributes.

Parameters:

  [in] | src | the handle to the attribute to copy

Returns:
  Status code

Status Codes:
  - MS::kSuccess The method was successful
  - MS::kFailure The method failed

void setClean | ( |  | ) |

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Marks the data that is represented by this handle as being clean.

This should be done after recalculating the data from the inputs.

Examples:
  anisotropicShader.cpp, apiMeshShape.cpp, backfillShader.cpp, blindDataShader.cpp, buildRotationNode.cpp, cellShader.cpp, cgfxShaderNode.cpp, checkerShader.cpp, clearcoat.cpp, compositingShader.cpp, contrastShader.cpp, cvColorShader.cpp, displacementShader.cpp, flameShader.cpp, gammaShader.cpp, genericAttributeNode.cpp, geomShader.cpp, GLSLShaderNode.cpp, hwDecalBumpShader_NV20.cpp, hwPhongShader.cpp, hwReflectBumpShader_NV20.cpp, hwRefractReflectShader_NV20.cpp, hwToonShader_NV20.cpp, hwUnlitShader.cpp, interpShader.cpp, lambertShader.cpp, lavaShader.cpp, lightShader.cpp, meshOpNode.cpp, mixtureShader.cpp, noiseShader.cpp, phongShader.cpp, renderAccessNode.cpp, rockingTransform.cpp, shadowMatteShader.cpp, shiftNode.cpp, slopeShaderNode.cpp, solidCheckerShader.cpp, splitUVNode.cpp, and volumeShader.cpp.

bool & asBool | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

Returns:
  The handle's data as a boolean

Examples:
  anisotropicShader.cpp, apiMeshShape.cpp, backfillShader.cpp, cgfxShaderNode.cpp, cgfxVector.cpp, cvColorShader.cpp, lambertShader.cpp, lightShader.cpp, ownerEmitter.h, phongShader.cpp, pnTrianglesNode.cpp, pointOnMeshInfoNode.cpp, pointOnSubdNode.cpp, shadowMatteShader.cpp, shiftNode.cpp, simpleEmitter.h, sweptEmitter.h, torusField.h, and volumeShader.cpp.

char & asChar | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as a char

unsigned char & asUChar | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an unsigned char

short & asShort | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as a short integer

Examples:
  apiMeshCreator.cpp, buildRotationNode.cpp, GLSLShaderNode.cpp, meshOpNode.cpp, phongShader.cpp, quadricShape.cpp, and splitUVNode.cpp.

int & asLong | ( |  | ) | const

Search for all occurrences

This method is obsolete.

Deprecated:
  Use MDataHandle::asInt instead.

Returns:
  The handle's data as a int integer

Examples:
  blindDataMesh.cpp, cvColorShader.cpp, lavaShader.cpp, multiCurveNode.cpp, pointOnMeshInfoNode.cpp, and pointOnSubdNode.cpp.

int & asInt | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

Returns:
  The handle's data as a int integer

Examples:
  affectsNode.cpp, genericAttributeNode.cpp, hwColorPerVertexShader.cpp, hwPhongShader.cpp, particleAttrNode.cpp, and pnTrianglesNode.cpp.

void *& asAddr | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an address

Examples:
  cvColorShader.cpp, lightShader.cpp, and phongShader.cpp.

float & asFloat | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

Returns:
  The handle's data as a float

Examples:
  anisotropicShader.cpp, backfillShader.cpp, brickShader.cpp, cellShader.cpp, checkerShader.cpp, circleNode.cpp, clearcoat.cpp, compositingShader.cpp, cvColorShader.cpp, depthShader.cpp, displacementShader.cpp, flameShader.cpp, GLSLShaderNode.cpp, hwColorPerVertexShader.cpp, hwPhongShader.cpp, hwToonShader_NV20.cpp, interpShader.cpp, jitterNode.cpp, lambertShader.cpp, latticeNoiseNode.cpp, lavaShader.cpp, lightShader.cpp, noiseShader.cpp, offsetNode.cpp, phongShader.cpp, renderAccessNode.cpp, shadowMatteShader.cpp, shiftNode.cpp, sineNode.cpp, slopeShaderNode.cpp, solidCheckerShader.cpp, volumeShader.cpp, and yTwistNode.cpp.

double & asDouble | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

Returns:
  The handle's data as a double

Examples:
  apiMeshCreator.cpp, apiMeshShape.cpp, closestPointOnCurveNode.cpp, customImagePlane.cpp, dynExprField.cpp, geometrySurfaceConstraint.cpp, multiCurveNode.cpp, ownerEmitter.h, particleAttrNode.cpp, pointOnMeshInfoNode.cpp, pointOnSubdNode.cpp, quadricShape.cpp, rockingTransform.cpp, simpleEmitter.h, simpleSpring.h, stringFormatNode.cpp, sweptEmitter.h, torusField.h, transCircleNode.cpp, and yTwistNode.cpp.

MDistance asDistance | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an Distance

MAngle asAngle | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an MAngle

MTime asTime | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Even though this method does not return a reference to an MTime, modifications to the MTime instance will update the contents of the handle in the data block. The method MDataHandle::setClean should be called after the data block has been modified.

Returns:
  The handle's data as an MTime

Examples:
  animCubeNode.cpp, latticeNoiseNode.cpp, ownerEmitter.h, simpleEmitter.h, sweptEmitter.h, testNobjectNode.cpp, and testNucleusNode.cpp.

short2 & asShort2 | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an array of two short integers

long2 & asLong2 | ( |  | ) | const

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This method is obsolete.

Deprecated:
  Use MDataHandle::asInt2 instead.

Returns:
  The handle's data as an array of two int integers

int2 & asInt2 | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an array of two int integers

float2 & asFloat2 | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an array of two floats

Examples:
  brickShader.cpp, checkerShader.cpp, and shiftNode.cpp.

double2 & asDouble2 | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an array of two doubles

short3 & asShort3 | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an array of three short integers

long3 & asLong3 | ( |  | ) | const

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This method is obsolete.

Deprecated:
  Use MDataHandle::asInt3 instead.

Returns:
  The handle's data as an array of three int integers

int3 & asInt3 | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an array of three int integers

float3 & asFloat3 | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an array of three float values

Examples:
  cellShader.cpp, flameShader.cpp, hwColorPerVertexShader.cpp, hwPhongShader.cpp, lavaShader.cpp, noiseShader.cpp, and solidCheckerShader.cpp.

double3 & asDouble3 | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as an array array of three doubles

Examples:
  apiMeshShape.cpp, cgfxVector.cpp, ownerEmitter.h, rockingTransformCheck.cpp, simpleEmitter.h, sweptEmitter.h, and transCircleNode.cpp.

MVector & asVector | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as a vector

Examples:
  buildRotationNode.cpp.

MFloatVector & asFloatVector | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as a vector

Examples:
  anisotropicShader.cpp, backfillShader.cpp, blindDataShader.cpp, brickShader.cpp, cellShader.cpp, cgfxShaderNode.cpp, checkerShader.cpp, clearcoat.cpp, compositingShader.cpp, contrastShader.cpp, cvColorShader.cpp, depthShader.cpp, displacementShader.cpp, dynExprField.cpp, flameShader.cpp, gammaShader.cpp, geomShader.cpp, GLSLShaderNode.cpp, hwColorPerVertexShader.cpp, hwDecalBumpShader_NV20.cpp, hwPhongShader.cpp, hwReflectBumpShader_NV20.cpp, hwRefractReflectShader_NV20.cpp, hwToonShader_NV20.cpp, hwUnlitShader.cpp, interpShader.cpp, lambertShader.cpp, lavaShader.cpp, lightShader.cpp, mixtureShader.cpp, noiseShader.cpp, phongShader.cpp, shadowMatteShader.cpp, shiftNode.cpp, slopeShaderNode.cpp, solidCheckerShader.cpp, and volumeShader.cpp.

MMatrix & asMatrix | ( |  | ) | const

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Returns the data represented by this handle in the data block.

This method is only valid for attributes created using the MFnMatrixAttribute function set.

Returns:
  The handle's data as a matrix

Examples:
  offsetNode.cpp, ownerEmitter.cpp, simpleEmitter.cpp, and torusField.cpp.

MFloatMatrix & asFloatMatrix | ( |  | ) | const

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Returns the data represented by this handle in the data block.

This method is only valid for attributes created using the MFnMatrixAttribute function set.

Returns:
  The handle's data as a matrix of floats

Examples:
  anisotropicShader.cpp, cellShader.cpp, flameShader.cpp, lavaShader.cpp, noiseShader.cpp, slopeShaderNode.cpp, and solidCheckerShader.cpp.

MString & asString | ( |  | ) | const

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Returns the data represented by this handle in the data block.

Returns:
  The handle's data as a string

Examples:
  cgfxShaderNode.cpp, GLSLShaderNode.cpp, hlslShader.cpp, hwColorPerVertexShader.cpp, and stringFormatNode.cpp.

MObject asNurbsCurve | ( |  | ) | const

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Returns the data represented by this handle in the data block.

The object returned by this call may be used directly with the nurbs curve function set and iterator. Even though this method does not return a reference to an MObject, modifications to the MObject instance will update the contents of the handle in the data block. The method MDataHandle::setClean should be called after the data block has been modified.

The curve returned by this method will be in local space even if the connection is supplying world space geometry. This occurs mostly for efficiency reasons. In the case of a world space geometry connection, the MObject returned by this method will also contain the world space transformation matrix. This means that world space operations may be performed on this object using the nurbs curve function set and iterator.

It is possible to get the matrix that defines the local to world transformation for this geometry using the MDataHandle::geometryTransformMatrix() method.

Returns:
  The handle's data as a nurbs curve

Examples:
  closestPointOnCurveNode.cpp, fullLoftNode.cpp, and simpleLoftNode.cpp.

MObject asNurbsSurface | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

The object returned by this call may be used directly with the nurbs surface function set and iterator. Even though this method does not return a reference to an MObject, modifications to the MObject instance will update the contents of the handle in the data block. The method MDataHandle::setClean should be called after the data block has been modified.

The surface returned by this method will be in local space even if the connection is supplying world space geometry. This occurs mostly for efficiency reasons. In the case of a world space geometry connection, the MObject returned by this method will also contain the world space transformation matrix. This means that world space operations may be performed on this object using the nurbs surface function set and iterator.

It is possible to get the matrix that defines the local to world transformation for this geometry using the MDataHandle::geometryTransformMatrix() method.

Returns:
  The handle's data as a nurbs surface

Examples:
  cvColorNode.cpp.

MObject asMesh | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

The object returned by this call may be used directly with the mesh function set and iterators. Even though this method does not return a reference to an MObject, modifications to the MObject instance will update the contents of the handle in the data block. The method MDataHandle::setClean should be called after the data block has been modified.

The surface returned by this method will be in local space even if the connection is supplying world space geometry. This occurs mostly for efficiency reasons. In the case of a world space geometry connection, the MObject returned by this method will also contain the world space transformation matrix. This means that world space operations may be performed on this object using the mesh function set and iterators.

It is possible to get the matrix that defines the local to world transformation for this geometry using the MDataHandle::geometryTransformMatrix() method.

Returns:
  The handle's data as a mesh (polygonal surface)

Examples:
  geometrySurfaceConstraint.cpp, meshOpNode.cpp, pointOnMeshInfoNode.cpp, shellNode.cpp, splitUVNode.cpp, and testNobjectNode.cpp.

MObject asSubdSurface | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

The object returned by this call may be used directly with the subdivision surface function set and iterator. Even though this method does not return a reference to an MObject, modifications to the MObject instance will update the contents of the handle in the data block. The method MDataHandle::setClean should be called after the data block has been modified.

The subdivision surface returned by this method will be in local space even if the connection is supplying world space geometry. This occurs mostly for efficiency reasons. In the case of a world space geometry connection, the MObject returned by this method will also contain the world space transformation matrix. This means that world space operations may be performed on this object using the subdivision surface function set and iterator.

It is possible to get the matrix that defines the local to world transformation for this geometry using the MDataHandle::geometryTransformMatrix() method.

Returns:
  The handle's data as a subdivision surface

Examples:
  pointOnSubdNode.cpp.

MObject asNurbsCurveTransformed | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

The object returned by this call may be used directly with the nurbs curve function set (MFnNurbsCurve) or the nurbs curve CV iterator (MItCurveCV).

If the incoming curve comes with world space transformation data, then it will be applied to the data that is returned. In other words, the curve that is returned will be the curve as it exists in world space.

The curve that is returned from this method should not be modified. This method is only provided to make it easier to take world space geometry as input.

Returns:
  The handle's data as a nurbs curve

Examples:
  arcLenNode.cpp, and multiCurveNode.cpp.

MObject asNurbsSurfaceTransformed | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

The object returned by this call may be used directly with the nurbs surface function set (MFnNurbsSurface) or the nurbs surface CV iterator (MItSurfaceCV).

If the incoming surface comes with world space transformation data, then it will be applied to the data that is returned. In other words, the surface that is returned will be the surface as it exists in world space.

The surface that is returned from this method should not be modified. This method is only provided to make it easier to take world space geometry as input.

Returns:
  The handle's data as a nurbs surface

MObject asMeshTransformed | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

The object returned by this call may be used directly with the mesh function set (MFnMesh) or any of the mesh iterators.

If the incoming mesh comes with world space transformation data, then it will be applied to the data that is returned. In other words, the mesh that is returned will be the mesh as it exists in world space.

The mesh that is returned from this method should not be modified. This method is only provided to make it easier to take world space geometry as input.

Returns:
  The handle's data as a mesh

MObject asSubdSurfaceTransformed | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

The object returned by this call may be used directly with the subdivision surface function set (MFnSubdSurface) or the subdivision surface iterators (MItSubdVertex, MItSubdFace, MItSubdEdge).

If the incoming surface comes with world space transformation data, then it will be applied to the data that is returned. In other words, the surface that is returned will be the surface as it exists in world space.

The surface that is returned from this method should not be modified. This method is only provided to make it easier to take world space geometry as input.

Returns:
  The handle's data as a subdivision surface

const MMatrix & geometryTransformMatrix | ( |  | ) | const

Search for all occurrences

This method returns a reference to the local-to-world transformation matrix that can accompany a geometry data object.

Only use this method on handles to geometry data (curves, surfaces, and meshes).

If no local-to-world transformation information has been provided then this will be an identity matrix.

Returns:
  The handle's transform data as a 4x4 matrix

MPxData * asPluginData | ( |  | ) | const

Search for all occurrences

Returns the data represented by this handle in the data block.

The object is returned as plugin data. This should be used to access data types defined by plugins.

Returns:
  The handle's data

Examples:
  apiMeshShape.cpp.

void set | ( | bool | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setBool method instead.

Parameters:

  [in] | val | the new value

Examples:
  affectsNode.cpp, animCubeNode.cpp, apiMeshCreator.cpp, apiMeshShape.cpp, arcLenNode.cpp, blindDataMesh.cpp, buildRotationNode.cpp, cgfxShaderNode.cpp, cgfxVector.cpp, circleNode.cpp, closestPointOnCurveNode.cpp, customImagePlane.cpp, cvColorNode.cpp, dynExprField.cpp, fullLoftNode.cpp, genericAttributeNode.cpp, GLSLShaderNode.cpp, hlslShader.cpp, hwColorPerVertexShader.cpp, hwPhongShader.cpp, jitterNode.cpp, latticeNoiseNode.cpp, meshOpNode.cpp, multiCurveNode.cpp, ownerEmitter.cpp, pnTrianglesNode.cpp, pointOnMeshInfoNode.cpp, pointOnSubdNode.cpp, quadricShape.cpp, rockingTransform.cpp, rockingTransformCheck.cpp, shellNode.cpp, shiftNode.cpp, simpleEmitter.cpp, simpleLoftNode.cpp, sineNode.cpp, splitUVNode.cpp, stringFormatNode.cpp, sweptEmitter.cpp, testNobjectNode.cpp, torusField.cpp, transCircleNode.cpp, and weightListNode.cpp.

void set | ( | char | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setChar method instead.

Parameters:

  [in] | val | the new value

void set | ( | short | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setShort method instead.

Parameters:

  [in] | val | the new value

void set | ( | int | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setInt method instead.

Parameters:

  [in] | val | the new value

void set | ( | float | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setFloat method instead.

Parameters:

  [in] | val | the new value

void set | ( | double | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setDouble method instead.

Parameters:

  [in] | val | the new value

void set | ( | const MMatrix & | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block. This method is only valid for attributes created using the MFnMatrixAttribute function set.

Python Notes

This method is not available from Python. See setMMatrix method instead.

Parameters:

  [in] | val | the new value

void set | ( | const MFloatMatrix & | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMFloatMatrix method instead.

Parameters:

  [in] | val | the new value

void set | ( | const MVector & | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMVector method instead.

Parameters:

  [in] | val | the new value

void set | ( | const MFloatVector & | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMFloatVector method instead.

Parameters:

  [in] | val | the new value

void set | ( | const MDistance & | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMDistance method instead.

Parameters:

  [in] | val | the new value

void set | ( | const MAngle & | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMAngle method instead.

Parameters:

  [in] | val | the new value

void set | ( | const MTime & | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setMTime method instead.

Parameters:

  [in] | val | the new value

void set | ( | short | val1,
|  | short | val2
| ) |  |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set2Short method instead.

Parameters:

  [in] | val1 | the first value in the two element array
  [in] | val2 | the second value in the two element array

void set | ( | int | val1,
|  | int | val2
| ) |  |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set2Int method instead.

Parameters:

  [in] | val1 | the first value in the two element array
  [in] | val2 | the second value in the two element array

void set | ( | float | val1,
|  | float | val2
| ) |  |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set2Float method instead.

Parameters:

  [in] | val1 | the first value in the two element array
  [in] | val2 | the second value in the two element array

void set | ( | double | val1,
|  | double | val2
| ) |  |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set2Double method instead.

Parameters:

  [in] | val1 | the first value in the two element array
  [in] | val2 | the second value in the two element array

void set | ( | short | val1,
|  | short | val2,
|  | short | val3
| ) |  |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set3Short method instead.

Parameters:

  [in] | val1 | the first value in the three element array
  [in] | val2 | the second value in the three element array
  [in] | val3 | the third value in the three element array

void set | ( | int | val1,
|  | int | val2,
|  | int | val3
| ) |  |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set3Int method instead.

Parameters:

  [in] | val1 | the first value in the three element array
  [in] | val2 | the second value in the three element array
  [in] | val3 | the third value in the three element array

void set | ( | float | val1,
|  | float | val2,
|  | float | val3
| ) |  |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set3Float method instead.

Parameters:

  [in] | val1 | the first value in the three element array
  [in] | val2 | the second value in the three element array
  [in] | val3 | the third value in the three element array

void set | ( | double | val1,
|  | double | val2,
|  | double | val3
| ) |  |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See set3Double method instead.

Parameters:

  [in] | val1 | the first value in the three element array
  [in] | val2 | the second value in the three element array
  [in] | val3 | the third value in the three element array

void set | ( | const MString & | val | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block.

Python Notes

This method is not available from Python. See setString method instead.

Parameters:

  [in] | val | the new string value

MStatus set | ( | const MObject & | data | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block. This method assumes that the MObject is a dependency graph data object. These objects can be created using the appropriate MFn..Data function set. Note that this method cannot be used to copy compound or multi attributes from one handle to another via the construct outputHandle.set (inputHandle.data()). To copy these user defined attributes, the method MDataHandle::copy must be used.

Python Notes

This method is not available from Python. See setMObject method instead.

Parameters:

  [in] | data | the data object

Returns:
  Status code

Status Codes:
  - MS::kSuccess The method was successful
  - MS::kInvalidParameter Invalid object passed in

MStatus set | ( | MPxData * | data | ) |

Search for all occurrences

No script support.

This method is not available in Python.

Set the data that this handle represents in the data block. This method takes a pointer to a user defined data object. The data block will become the new owner of the data object that you pass in. Do not delete it.

Python Notes

This method is not available from Python. See setMPxData method instead.

Parameters:

  [in] | data | the data object

Returns:
  Status code

Status Codes:
  - MS::kSuccess The method was successful
  - MS::kInvalidParameter Invalid data

void setBool | ( | bool | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void setChar | ( | char | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void setShort | ( | short | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void setInt | ( | int | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void setFloat | ( | float | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void setDouble | ( | double | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void setMMatrix | ( | const MMatrix & | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

This method is only valid for attributes created using the MFnMatrixAttribute function set.

Parameters:

  [in] | val | the new value

void setMFloatMatrix | ( | const MFloatMatrix & | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void setMVector | ( | const MVector & | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void setMFloatVector | ( | const MFloatVector & | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void setMDistance | ( | const MDistance & | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void setMAngle | ( | const MAngle & | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void setMTime | ( | const MTime & | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new value

void set2Short | ( | short | val1,
|  | short | val2
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val1 | the first value in the two element array
  [in] | val2 | the second value in the two element array

void set2Int | ( | int | val1,
|  | int | val2
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val1 | the first value in the two element array
  [in] | val2 | the second value in the two element array

void set2Float | ( | float | val1,
|  | float | val2
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val1 | the first value in the two element array
  [in] | val2 | the second value in the two element array

void set2Double | ( | double | val1,
|  | double | val2
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val1 | the first value in the two element array
  [in] | val2 | the second value in the two element array

void set3Short | ( | short | val1,
|  | short | val2,
|  | short | val3
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val1 | the first value in the three element array
  [in] | val2 | the second value in the three element array
  [in] | val3 | the third value in the three element array

void set3Int | ( | int | val1,
|  | int | val2,
|  | int | val3
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val1 | the first value in the three element array
  [in] | val2 | the second value in the three element array
  [in] | val3 | the third value in the three element array

void set3Float | ( | float | val1,
|  | float | val2,
|  | float | val3
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val1 | the first value in the three element array
  [in] | val2 | the second value in the three element array
  [in] | val3 | the third value in the three element array

void set3Double | ( | double | val1,
|  | double | val2,
|  | double | val3
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val1 | the first value in the three element array
  [in] | val2 | the second value in the three element array
  [in] | val3 | the third value in the three element array

void setString | ( | const MString & | val | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | val | the new string value

MStatus setMObject | ( | const MObject & | data | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

This method assumes that the MObject is a dependency graph data object. These objects can be created using the appropriate MFn..Data function set. Note that this method cannot be used to copy compound or multi attributes from one handle to another via the construct outputHandle.set (inputHandle.data()). To copy these user defined attributes, the method MDataHandle::copy must be used.

Parameters:

  [in] | data | the data object

Returns:
  Status code

Status Codes:
  - MS::kSuccess The method was successful
  - MS::kInvalidParameter Invalid object passed in

Examples:
  geometrySurfaceConstraint.cpp.

MStatus setMPxData | ( | MPxData * | data | ) |

Search for all occurrences

Set the data that this handle represents in the data block.

This method takes a pointer to a user defined data object. The data block will become the new owner of the data object that you pass in. Do not delete it.

Parameters:

  [in] | data | the data object

Returns:
  Status code

Status Codes:
  - MS::kSuccess The method was successful
  - MS::kInvalidParameter Invalid data

bool asGenericBool | ( |  | ) | const

Search for all occurrences

Returns the generic data represented by this handle in the data block.

Returns:
  The generic handle's data as a bool

unsigned char asGenericChar | ( |  | ) | const

Search for all occurrences

Returns the generic data represented by this handle in the data block.

Returns:
  The generic handle's data as a char

double asGenericDouble | ( |  | ) | const

Search for all occurrences

Returns the generic data represented by this handle in the data block.

Returns:
  The generic handle's data as a double

float asGenericFloat | ( |  | ) | const

Search for all occurrences

Returns the generic data represented by this handle in the data block.

Returns:
  The generic handle's data as a float

short asGenericShort | ( |  | ) | const

Search for all occurrences

Returns the generic data represented by this handle in the data block.

Returns:
  The generic handle's data as a short

int asGenericInt | ( |  | ) | const

Search for all occurrences

Returns the generic data represented by this handle in the data block.

Returns:
  The generic handle's data as a int

void setGenericBool | ( | bool | value,
|  | bool | force
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | value | the new bool value
  [in] | force | force the new type of the attribute to be bool

Examples:
  genericAttributeNode.cpp.

void setGenericChar | ( | unsigned char | value,
|  | bool | force
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | value | the new char value
  [in] | force | force the new type of the attribute to be char

Examples:
  genericAttributeNode.cpp.

void setGenericDouble | ( | double | value,
|  | bool | force
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | value | the new double value
  [in] | force | force the new type of the attribute to be double

Examples:
  genericAttributeNode.cpp.

void setGenericFloat | ( | float | value,
|  | bool | force
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | value | the new float value
  [in] | force | force the new type of the attribute to be float

Examples:
  genericAttributeNode.cpp.

void setGenericShort | ( | short | value,
|  | bool | force
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | value | the new short value
  [in] | force | force the new type of the attribute to be short

Examples:
  genericAttributeNode.cpp.

void setGenericInt | ( | int | value,
|  | bool | force
| ) |  |

Search for all occurrences

Set the data that this handle represents in the data block.

Parameters:

  [in] | value | the new int value
  [in] | force | force the new type of the attribute to be int

Examples:
  genericAttributeNode.cpp.

MDataHandle child | ( | const MPlug & | plug | ) |

Search for all occurrences

Get a handle to a child of this handle.

This is used if you have a handle to a compound attribute.

Parameters:

  [in] | plug | the plug of the child

Returns:
  The data handle for the child

Examples:
  anisotropicShader.cpp, backfillShader.cpp, dynExprField.cpp, geometrySurfaceConstraint.cpp, lambertShader.cpp, lightShader.cpp, phongShader.cpp, shadowMatteShader.cpp, torusField.cpp, and weightListNode.cpp.

MDataHandle child | ( | const MObject & | attribute | ) |

Search for all occurrences

Get a handle to a child of this handle.

This is used if you have a handle to a compound attribute.

Parameters:

  [in] | attribute | the attribute of the child

Returns:
  The data handle for the child

MDataHandle & operator= | ( | const MDataHandle & | other | ) | `[inline]`

Assignment operator.

Parameters:

  [in] | other | Data handle to copy from.

const char * className | ( |  | ) | `[static]`

Search for all occurrences

Returns the name of this class.

Returns:
  Name of this class.

MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle
MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle MDataHandle