import com.google.common.base.Preconditions;

public class AdditionalDataBuilderFactory {

    @SuppressWarnings("unchecked")
    public static <T extends AdditionalData, S extends AdditionalDataSpec> AdditionalDataBuilder<T> builderFor(Class<? extends S> type) {
        Preconditions.checkNotNull(type);
        if (TypeValidationDataSpec.class.isAssignableFrom(type)) {
            return (AdditionalDataBuilder<T>) DefaultTypeValidationData.builder();

            AdditionalDataBuilder<?> additionalDatabuilder = AdditionalDataBuilderFactory.builderFor(specType);
            config.execute((U) additionalDatabuilder);
            additionalData = additionalDatabuilder.build();
        } else {
            AdditionalDataBuilder<?> additionalDatabuilder = AdditionalDataBuilderFactory.builderFor(additionalData);
            config.execute((U) additionalDatabuilder);