org.jpmml.evaluator.EntityUtil.java Source code

Introduction

Here is the source code for org.jpmml.evaluator.EntityUtil.java

Source

/*
 * Copyright (c) 2013 Villu Ruusmann
 *
 * This file is part of JPMML-Evaluator
 *
 * JPMML-Evaluator 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-Evaluator 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-Evaluator.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.jpmml.evaluator;

import java.util.List;

import com.google.common.collect.ImmutableBiMap;
import org.dmg.pmml.HasId;
import org.dmg.pmml.PMMLObject;
import org.jpmml.manager.InvalidFeatureException;

public class EntityUtil {

    private EntityUtil() {
    }

    static public <E extends PMMLObject & HasId> ImmutableBiMap<String, E> buildBiMap(List<E> entities) {
        ImmutableBiMap.Builder<String, E> builder = new ImmutableBiMap.Builder<String, E>();

        builder = putAll(entities, builder);

        return builder.build();
    }

    static public <E extends PMMLObject & HasId> ImmutableBiMap.Builder<String, E> put(E entity,
            ImmutableBiMap.Builder<String, E> builder) {
        String id = entity.getId();
        if (id == null) {
            throw new InvalidFeatureException(entity);
        }

        return builder.put(id, entity);
    }

    static public <E extends PMMLObject & HasId> ImmutableBiMap.Builder<String, E> putAll(List<E> entities,
            ImmutableBiMap.Builder<String, E> builder) {

        for (int i = 0, j = 1; i < entities.size(); i++, j++) {
            E entity = entities.get(i);

            String id = entity.getId();

            // Generate an implicit identifier (ie. 1-based index) if the explicit identifier is missing
            if (id == null) {
                id = String.valueOf(j);
            } // End if

            builder = builder.put(id, entity);
        }

        return builder;
    }
}