public Set doTranslation()

in taverna-reference-impl/src/main/java/org/apache/taverna/reference/impl/TranslationPath.java [87:130]
33 lines of code
10 McCabe index (conditional complexity)

	public Set<ExternalReferenceSPI> doTranslation(ReferenceSet rs,
			ReferenceContext context) {
		Set<ExternalReferenceSPI> results = new HashSet<>();
		/*
		 * Firstly check whether we have an initial reference and builder
		 * defined
		 */
		ExternalReferenceSPI currentReference = null;
		if (getInitialBuilder() != null && getSourceReference() != null)
			try (InputStream stream = getSourceReference().openStream(context)) {
				ExternalReferenceSPI builtReference = getInitialBuilder()
						.createReference(stream, context);
				results.add(builtReference);
				currentReference = builtReference;
			} catch (IOException e) {
				throw new DereferenceException(
						"Can't create reference from stream", e);
			}
		if (!getTranslators().isEmpty() && currentReference == null)
			/*
			 * If there are translators in the path (there may not be if this is
			 * a pure 'dereference and build' type path) and the
			 * currentReference hasn't been set then search the existing
			 * references for an appropriate starting point for the translation.
			 */
			for (ExternalReferenceSPI er : rs.getExternalReferences())
				if (er.getClass().equals(
						getTranslators().get(0).getSourceReferenceType())) {
					currentReference = er;
					break;
				}
		if (currentReference == null)
			throw new RuntimeException(
					"Can't locate a starting reference for the"
							+ " translation path");

		for (ExternalReferenceTranslatorSPI translator : getTranslators()) {
			ExternalReferenceSPI translatedReference = translator
					.createReference(currentReference, context);
			results.add(translatedReference);
			currentReference = translatedReference;
		}
		return results;
	}