Examples with CategoricalFeature org.jpmml.converter.CategoricalFeature used on opensource projects

Example 16 with CategoricalFeature

use of org.jpmml.converter.CategoricalFeature in project jpmml-sparkml by jpmml.

the class StringIndexerModelConverter method encodeFeatures.

@Override
public List<Feature> encodeFeatures(SparkMLEncoder encoder) {
    StringIndexerModel transformer = getTransformer();
    Feature feature = encoder.getOnlyFeature(transformer.getInputCol());
    List<String> categories = new ArrayList<>();
    categories.addAll(Arrays.asList(transformer.labels()));
    String handleInvalid = transformer.getHandleInvalid();
    Field<?> field = encoder.toCategorical(feature.getName(), categories);
    if (field instanceof DataField) {
        DataField dataField = (DataField) field;
        InvalidValueTreatmentMethod invalidValueTreatmentMethod;
        switch(handleInvalid) {
            case "keep":
                invalidValueTreatmentMethod = InvalidValueTreatmentMethod.AS_IS;
                break;
            case "error":
                invalidValueTreatmentMethod = InvalidValueTreatmentMethod.RETURN_INVALID;
                break;
            default:
                throw new IllegalArgumentException(handleInvalid);
        }
        InvalidValueDecorator invalidValueDecorator = new InvalidValueDecorator().setInvalidValueTreatment(invalidValueTreatmentMethod);
        encoder.addDecorator(dataField.getName(), invalidValueDecorator);
    } else if (field instanceof DerivedField) {
    // Ignored
    } else {
        throw new IllegalArgumentException();
    }
    switch(handleInvalid) {
        case "keep":
            Apply setApply = PMMLUtil.createApply("isIn", feature.ref());
            for (String category : categories) {
                setApply.addExpressions(PMMLUtil.createConstant(category, feature.getDataType()));
            }
            categories.add(StringIndexerModelConverter.LABEL_UNKNOWN);
            Apply apply = PMMLUtil.createApply("if", setApply, feature.ref(), PMMLUtil.createConstant(StringIndexerModelConverter.LABEL_UNKNOWN, DataType.STRING));
            field = encoder.createDerivedField(FeatureUtil.createName("handleInvalid", feature), OpType.CATEGORICAL, feature.getDataType(), apply);
            break;
        default:
            break;
    }
    return Collections.<Feature>singletonList(new CategoricalFeature(encoder, field, categories));
}