/**
 * Builds up the transformer context.
 * After the buildplan is ready, the build()-method returns the immutable context useful during distribution.
 * This is an inner class, as it must be able to call readRawModel()
 *
 * @since 4.0.0
 */
class DefaultModelTransformerContextBuilder implements ModelTransformerContextBuilder {
    private final Graph dag = new Graph();
    private final DefaultModelBuilder defaultModelBuilder;

            final ModelBuilderRequest request,
            final DefaultModelBuilderResult result,
            DefaultModelProblemCollector problems)
            throws ModelBuilderException {
        Model inputModel = readRawModel(request, problems);
        if (problems.hasFatalErrors()) {
            throw problems.newModelBuilderException();
        }

        inputModel = activateFileModel(inputModel, request, result, problems);