class OpRESTfulBlockwiseFilesetReader(Operator): """ Adapter that provides an operator interface to the BlockwiseFileset class for reading ONLY. """ name = "OpRESTfulBlockwiseFilesetReader" DescriptionFilePath = InputSlot(stype='filestring') Output = OutputSlot() def __init__(self, *args, **kwargs): super(OpRESTfulBlockwiseFilesetReader, self).__init__(*args, **kwargs) self._blockwiseFileset = None def setupOutputs(self): # Load up the class that does the real work self._blockwiseFileset = RESTfulBlockwiseFileset( self.DescriptionFilePath.value ) # Check for errors in the description file localDescription = self._blockwiseFileset.compositeDescription.local_description axes = localDescription.axes assert False not in map(lambda a: a in 'txyzc', axes), "Unknown axis type. Known axes: txyzc Your axes:".format(axes) self.Output.meta.shape = localDescription.view_shape self.Output.meta.dtype = localDescription.dtype self.Output.meta.axistags = vigra.defaultAxistags(localDescription.axes) def execute(self, slot, subindex, roi, result): assert slot == self.Output, "Unknown output slot" self._blockwiseFileset.readData( (roi.start, roi.stop), result ) return result def propagateDirty(self, slot, subindex, roi): assert slot == self.DescriptionFilePath, "Unknown input slot." self.Output.setDirty( slice(None) )
def test_1_SingleDownload(self): volume = RESTfulBlockwiseFileset( self.descriptionFilePath ) slicing = numpy.s_[0:20, 0:20, 0:20] roi = sliceToRoi(slicing, volume.description.shape) data = volume.readData( roi ) assert data.shape == (20,20,20) assert volume.getBlockStatus( ([0,0,0]) ) == BlockwiseFileset.BLOCK_AVAILABLE
def test_4_OffsetDownload(self): volume = RESTfulBlockwiseFileset( self.descriptionFilePath ) slicing = numpy.s_[20:40, 20:40, 20:40] roi = sliceToRoi(slicing, volume.description.shape) data = volume.readData( roi ) assert data.shape == (20,20,20) assert volume.getBlockStatus( ([20,20,20]) ) == BlockwiseFileset.BLOCK_AVAILABLE offsetVolume = RESTfulBlockwiseFileset( self.descriptionFilePath_offset ) offsetSlicing = numpy.s_[20:40, 0:20, 20:40] # Note middle slice is offset (see view_origin in setupClass) offsetRoi = sliceToRoi(offsetSlicing, offsetVolume.description.shape) offsetData = offsetVolume.readData( offsetRoi ) assert offsetData.shape == (20,20,20) assert offsetVolume.getBlockStatus( ([20,0,20]) ) == BlockwiseFileset.BLOCK_AVAILABLE # Data should be the same assert (offsetData == data).all()