private NXobject getNexusObjectForMetadataType(NXentry entry, MetadataType type) {
    if (type == null) {
      return entry;
    }

    switch (type) {
      case ENTRY:
        return entry;
      case INSTRUMENT:
        return entry.getInstrument();
      case SAMPLE:
        return entry.getSample();
      case USER:
        return entry.getUser();
      default:
        throw new IllegalArgumentException("Unknown metadata type " + type);
    }
  }
示例#2
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  /** Validate group 'entry' of type NXentry. */
  private void validateGroup_entry(final NXentry group) throws Exception {
    // validate that the group is not null
    validateGroupNotNull("entry", NXentry.class, group);

    // validate field 'title' of unknown type.
    final IDataset title = group.getTitle();
    validateFieldNotNull("title)", title);

    // validate field 'start_time' of type NX_DATE_TIME.
    final IDataset start_time = group.getStart_time();
    validateFieldNotNull("start_time)", start_time);
    validateFieldType("start_time)", start_time, NX_DATE_TIME);

    // validate field 'end_time' of type NX_DATE_TIME.
    final IDataset end_time = group.getEnd_time();
    validateFieldNotNull("end_time)", end_time);
    validateFieldType("end_time)", end_time, NX_DATE_TIME);

    // validate field 'definition' of unknown type.
    final IDataset definition = group.getDefinition();
    validateFieldNotNull("definition)", definition);
    validateFieldEnumeration("definition", definition, "NXrefscan");

    // validate child group 'instrument' of type NXinstrument
    // $groupNameInBaseClass = instrument
    validateGroup_entry_instrument(group.getInstrument());

    // validate child group 'sample' of type NXsample
    // $groupNameInBaseClass = sample
    validateGroup_entry_sample(group.getSample());

    // validate child group 'control' of type NXmonitor
    // $groupNameInBaseClass = monitor
    validateGroup_entry_control(group.getMonitor());

    // validate child group 'data' of type NXdata
    // $groupNameInBaseClass = data
    validateGroup_entry_data(group.getData());
  }
  private void checkNexusFile(
      IRunnableDevice<ScanModel> scanner, List<ScanMetadata> scanMetadata, int... sizes)
      throws Exception {

    final ScanModel scanModel = ((AbstractRunnableDevice<ScanModel>) scanner).getModel();
    assertEquals(DeviceState.READY, scanner.getDeviceState());

    NXroot rootNode = getNexusRoot(scanner);
    NXentry entry = rootNode.getEntry();
    checkMetadata(entry, scanMetadata);
    // check that the scan points have been written correctly
    assertScanPointsGroup(entry, sizes);

    NXinstrument instrument = entry.getInstrument();

    LinkedHashMap<String, List<String>> signalFieldAxes = new LinkedHashMap<>();
    // axis for additional dimensions of a datafield, e.g. image
    signalFieldAxes.put(NXdetector.NX_DATA, Arrays.asList("real", "imaginary"));
    signalFieldAxes.put("spectrum", Arrays.asList("spectrum_axis"));
    signalFieldAxes.put("value", Collections.emptyList());

    String detectorName = scanModel.getDetectors().get(0).getName();
    NXdetector detector = instrument.getDetector(detectorName);
    // map of detector data field to name of nxData group where that field
    // is the @signal field
    Map<String, String> expectedDataGroupNames =
        signalFieldAxes
            .keySet()
            .stream()
            .collect(
                Collectors.toMap(
                    Function.identity(),
                    x -> detectorName + (x.equals(NXdetector.NX_DATA) ? "" : "_" + x)));

    // validate the main NXdata generated by the NexusDataBuilder
    Map<String, NXdata> nxDataGroups = entry.getChildren(NXdata.class);
    assertEquals(signalFieldAxes.size(), nxDataGroups.size());
    assertTrue(nxDataGroups.keySet().containsAll(expectedDataGroupNames.values()));
    for (String nxDataGroupName : nxDataGroups.keySet()) {
      NXdata nxData = entry.getData(nxDataGroupName);

      String sourceFieldName =
          nxDataGroupName.equals(detectorName)
              ? NXdetector.NX_DATA
              : nxDataGroupName.substring(nxDataGroupName.indexOf('_') + 1);
      assertSignal(nxData, sourceFieldName);
      // check the nxData's signal field is a link to the appropriate source data node of the
      // detector
      DataNode dataNode = detector.getDataNode(sourceFieldName);
      IDataset dataset = dataNode.getDataset().getSlice();
      assertSame(dataNode, nxData.getDataNode(sourceFieldName));
      assertTarget(
          nxData,
          sourceFieldName,
          rootNode,
          "/entry/instrument/" + detectorName + "/" + sourceFieldName);

      // check that the other primary data fields of the detector haven't been added to this NXdata
      for (String primaryDataFieldName : signalFieldAxes.keySet()) {
        if (!primaryDataFieldName.equals(sourceFieldName)) {
          assertNull(nxData.getDataNode(primaryDataFieldName));
        }
      }

      int[] shape = dataset.getShape();
      for (int i = 0; i < sizes.length; i++) assertEquals(sizes[i], shape[i]);

      // Make sure none of the numbers are NaNs. The detector
      // is expected to fill this scan with non-nulls.
      final PositionIterator it = new PositionIterator(shape);
      while (it.hasNext()) {
        int[] next = it.getPos();
        assertFalse(Double.isNaN(dataset.getDouble(next)));
      }

      // Check axes
      final IPosition pos = scanModel.getPositionIterable().iterator().next();
      final Collection<String> scannableNames = pos.getNames();

      // Append _value_demand to each name in list, then add detector axis fields to result
      List<String> expectedAxesNames =
          Stream.concat(
                  scannableNames.stream().map(x -> x + "_value_set"),
                  signalFieldAxes.get(sourceFieldName).stream())
              .collect(Collectors.toList());
      assertAxes(nxData, expectedAxesNames.toArray(new String[expectedAxesNames.size()]));

      int[] defaultDimensionMappings = IntStream.range(0, sizes.length).toArray();
      int i = -1;
      for (String scannableName : scannableNames) {

        i++;
        NXpositioner positioner = instrument.getPositioner(scannableName);
        assertNotNull(positioner);

        dataNode = positioner.getDataNode("value_set");
        dataset = dataNode.getDataset().getSlice();
        shape = dataset.getShape();
        assertEquals(1, shape.length);
        assertEquals(sizes[i], shape[0]);

        String nxDataFieldName = scannableName + "_value_set";
        assertSame(dataNode, nxData.getDataNode(nxDataFieldName));
        assertIndices(nxData, nxDataFieldName, i);
        assertTarget(
            nxData, nxDataFieldName, rootNode, "/entry/instrument/" + scannableName + "/value_set");

        // Actual values should be scanD
        dataNode = positioner.getDataNode(NXpositioner.NX_VALUE);
        dataset = dataNode.getDataset().getSlice();
        shape = dataset.getShape();
        assertArrayEquals(sizes, shape);

        nxDataFieldName = scannableName + "_" + NXpositioner.NX_VALUE;
        assertSame(dataNode, nxData.getDataNode(nxDataFieldName));
        assertIndices(nxData, nxDataFieldName, defaultDimensionMappings);
        assertTarget(
            nxData,
            nxDataFieldName,
            rootNode,
            "/entry/instrument/" + scannableName + "/" + NXpositioner.NX_VALUE);
      }
    }
  }