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Workspace Validators

As with the basic types (int, float, etc.) there are some special validators for checking input workspaces.

Those currently available are:

• WorkspaceUnitValidator - Checks that the workspace unit matches a given value. Code to create: WorkspaceUnitValidator("UnitName")

• HistogramValidator - Checks if the workspace is a histogram. Code to create: HistogramValidator(True/False)

• CommonBinsValidator - Checks that if bins in the first and last spectrum are the same, i.e. a tentative check that the workspace’s spectra have common bins. Code to create: CommonBinsValidator()

• RawCountValidator - Checks if the workspace contains raw counts. Code to create: RawCountsValidator(True/False)

• InstrumentValidator - Checks if the input workspace has a defined instrument. Code to create: InstrumentValidator()

To use a specific one pass the created validator as the validator argument of the declareProperty function, e.g.

def PyInit(self):
    # Requires the input workspace to have x-axis units of Wavelength
    self.declareProperty(WorkspaceProperty(name="InputWorkspace",
                                           defaultValue="",
                                           direction=Direction.Input,
                                           validator=WorkspaceUnitValidator("Wavelength")))