Examples with CrossValidatorModel org.apache.spark.ml.tuning.CrossValidatorModel used on opensource projects

Example 1 with CrossValidatorModel

use of org.apache.spark.ml.tuning.CrossValidatorModel in project jpmml-sparkml by jpmml.

the class ConverterUtil method getTransformers.

private static Iterable<Transformer> getTransformers(PipelineModel pipelineModel) {
    List<Transformer> transformers = new ArrayList<>();
    transformers.add(pipelineModel);
    Function<Transformer, List<Transformer>> function = new Function<Transformer, List<Transformer>>() {

        @Override
        public List<Transformer> apply(Transformer transformer) {
            if (transformer instanceof PipelineModel) {
                PipelineModel pipelineModel = (PipelineModel) transformer;
                return Arrays.asList(pipelineModel.stages());
            } else if (transformer instanceof CrossValidatorModel) {
                CrossValidatorModel crossValidatorModel = (CrossValidatorModel) transformer;
                return Collections.<Transformer>singletonList(crossValidatorModel.bestModel());
            } else if (transformer instanceof TrainValidationSplitModel) {
                TrainValidationSplitModel trainValidationSplitModel = (TrainValidationSplitModel) transformer;
                return Collections.<Transformer>singletonList(trainValidationSplitModel.bestModel());
            }
            return null;
        }
    };
    while (true) {
        ListIterator<Transformer> transformerIt = transformers.listIterator();
        boolean modified = false;
        while (transformerIt.hasNext()) {
            Transformer transformer = transformerIt.next();
            List<Transformer> childTransformers = function.apply(transformer);
            if (childTransformers != null) {
                transformerIt.remove();
                for (Transformer childTransformer : childTransformers) {
                    transformerIt.add(childTransformer);
                }
                modified = true;
            }
        }
        if (!modified) {
            break;
        }
    }
    return transformers;
}