org.jpmml.evaluator.IntegrationTestBatch.java Source code

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

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/*
 * Copyright (c) 2015 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.io.IOException;
import java.io.InputStream;
import java.io.ObjectOutputStream;

import com.google.common.io.ByteStreams;
import org.dmg.pmml.PMML;
import org.jpmml.model.visitors.LocatorTransformer;

abstract public class IntegrationTestBatch extends ArchiveBatch {

    private Evaluator evaluator = null;

    public IntegrationTestBatch(String name, String dataset) {
        super(name, dataset);
    }

    abstract public IntegrationTest getIntegrationTest();

    @Override
    public InputStream open(String path) {
        IntegrationTest integrationTest = getIntegrationTest();

        Class<? extends IntegrationTest> clazz = integrationTest.getClass();

        return clazz.getResourceAsStream(path);
    }

    @Override
    public PMML getPMML() throws Exception {
        PMML pmml = super.getPMML();

        LocatorTransformer locatorTransformer = new LocatorTransformer();
        locatorTransformer.applyTo(pmml);

        return pmml;
    }

    @Override
    public Evaluator getEvaluator() throws Exception {

        if (this.evaluator == null) {
            Evaluator evaluator = super.getEvaluator();

            ensureSerializability(evaluator);

            this.evaluator = evaluator;
        }

        return this.evaluator;
    }

    @Override
    public void close() throws Exception {

        if (this.evaluator != null) {

            try {
                ensureSerializability(this.evaluator);
            } finally {
                this.evaluator = null;
            }
        }
    }

    static private void ensureSerializability(Evaluator evaluator) throws IOException {

        try (ObjectOutputStream oos = new ObjectOutputStream(ByteStreams.nullOutputStream())) {
            oos.writeObject(evaluator);
        }
    }
}