public void convertReferenceToPath()

in taverna-execution-local/src/main/java/org/apache/taverna/platform/execution/impl/local/LocalExecutionMonitor.java [425:487]
61 lines of code
16 McCabe index (conditional complexity)

	public void convertReferenceToPath(Path path, T2Reference reference,
			InvocationContext context) throws IOException, URISyntaxException {
		ReferenceService referenceService = context.getReferenceService();
		if (reference.getReferenceType() == T2ReferenceType.ReferenceSet) {
			if (DataBundles.isMissing(path)) {
				ReferenceSet rs = referenceService.getReferenceSetService()
						.getReferenceSet(reference);
				if (rs == null)
					throw new ReferenceServiceException(
							"Could not find ReferenceSet " + reference);
				// Check that there are references in the set
				if (rs.getExternalReferences().isEmpty())
					throw new ReferenceServiceException("ReferenceSet "
							+ reference + " is empty");

				for (ExternalReferenceSPI ers : rs.getExternalReferences()) {
					if (ers instanceof FileReference) {
						URI uri = ((FileReference) ers).getFile().toURI();
						DataBundles.setReference(path, uri);
					} else if (ers instanceof HttpReference) {
						URI uri = ((HttpReference) ers).getHttpUrl().toURI();
						DataBundles.setReference(path, uri);
					} else {
						try (InputStream in = ers.openStream(context)) {
							Files.copy(in, path);
						}
					}
				}
			}
		} else if (reference.getReferenceType() == T2ReferenceType.ErrorDocument) {
			if (DataBundles.isMissing(path)) {
				ErrorDocument errorDocument = referenceService
						.getErrorDocumentService().getError(reference);
				String message = errorDocument.getMessage();
				StringBuilder trace = new StringBuilder();
				if (errorDocument.getExceptionMessage() != null
						&& !errorDocument.getExceptionMessage().isEmpty()) {
					trace.append(errorDocument.getExceptionMessage());
					trace.append("\n");
				}
				List<StackTraceElementBean> stackTraceStrings = errorDocument
						.getStackTraceStrings();
				for (StackTraceElementBean stackTraceElement : stackTraceStrings) {
					trace.append(getStackTraceElementString(stackTraceElement));
					trace.append("\n");
				}
				List<Path> causes = new ArrayList<>();
				for (T2Reference errorReference : errorDocument
						.getErrorReferences())
					causes.add(getIntermediate(errorReference, context));
				DataBundles.setError(path, message, trace.toString(),
						causes.toArray(new Path[causes.size()]));
			}
		} else { // it is an IdentifiedList<T2Reference>
			IdentifiedList<T2Reference> identifiedList = referenceService
					.getListService().getList(reference);
			if (!DataBundles.isList(path))
				DataBundles.createList(path);
			for (T2Reference ref : identifiedList)
				convertReferenceToPath(DataBundles.newListItem(path), ref,
						context);
		}
	}