org.jpmml.converter.Schema Maven / Gradle / Ivy

Go to download
/*
 * Copyright (c) 2016 Villu Ruusmann
 *
 * This file is part of JPMML-Converter
 *
 * JPMML-Converter is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JPMML-Converter is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with JPMML-Converter.  If not, see .
 */
package org.jpmml.converter;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.function.Function;
import java.util.stream.Collectors;

import org.dmg.pmml.DataType;
import org.jpmml.model.ToStringHelper;

public class Schema {

	private Label label = null;

	private List features = null;


	public Schema(Label label, List features){
		setLabel(label);
		setFeatures(features);
	}

	public Schema toRelabeledSchema(Label label){
		List features = getFeatures();

		return new Schema(label, features);
	}

	public Schema toAnonymousSchema(){
		Label label = getLabel();

		return toRelabeledSchema(label != null ? label.toAnonymousLabel() : null);
	}

	public Schema toAnonymousRegressorSchema(DataType dataType){

		switch(dataType){
			case FLOAT:
			case DOUBLE:
				break;
			default:
				throw new IllegalArgumentException();
		}

		Label label = new ContinuousLabel(null, dataType);

		return toRelabeledSchema(label);
	}

	public Schema toEmptySchema(){
		Label label = getLabel();

		return new Schema(label, Collections.emptyList());
	}

	public Schema toSubSchema(int[] indexes){
		Label label = getLabel();
		List features = getFeatures();

		List selectedFeatures = new ArrayList<>(indexes.length);

		for(int index : indexes){
			Feature feature = features.get(index);

			selectedFeatures.add(feature);
		}

		return new Schema(label, selectedFeatures);
	}

	public Schema toTransformedSchema(Function function){
		Label label = getLabel();
		List features = getFeatures();

		List transformedFeatures = features.stream()
			.map(function)
			.collect(Collectors.toList());

		return new Schema(label, transformedFeatures);
	}

	@Override
	public String toString(){
		ToStringHelper helper = toStringHelper();

		return helper.toString();
	}

	protected ToStringHelper toStringHelper(){
		return new ToStringHelper(this)
			.add("label", getLabel())
			.add("features", getFeatures());
	}

	public Label getLabel(){
		return this.label;
	}

	private void setLabel(Label label){
		this.label = label;
	}

	public Feature getFeature(int index){
		List features = getFeatures();

		return features.get(index);
	}

	public List getFeatures(){
		return this.features;
	}

	private void setFeatures(List features){
		this.features = Objects.requireNonNull(features);
	}
}