com.liferay.batch.engine.internal.writer.JSONBatchEngineExportTaskItemWriterImpl Maven / Gradle / Ivy

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Liferay Batch Engine Service

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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 Lesser General Public License for more
 * details.
 */

package com.liferay.batch.engine.internal.writer;

import com.fasterxml.jackson.databind.ObjectWriter;
import com.fasterxml.jackson.databind.SequenceWriter;

import java.io.IOException;
import java.io.OutputStream;

import java.util.Collection;
import java.util.List;
import java.util.Set;

/**
 * @author Ivica Cardic
 */
public class JSONBatchEngineExportTaskItemWriterImpl
	implements BatchEngineExportTaskItemWriter {

	public JSONBatchEngineExportTaskItemWriterImpl(
			Set allFieldNames, List includeFieldNames,
			OutputStream outputStream)
		throws IOException {

		_outputStream = outputStream;

		ObjectWriter objectWriter = ObjectWriterFactory.getObjectWriter(
			allFieldNames, includeFieldNames);

		_sequenceWriter = objectWriter.writeValuesAsArray(_outputStream);
	}

	@Override
	public void close() throws IOException {
		_sequenceWriter.close();

		_outputStream.close();
	}

	@Override
	public void write(Collection items) throws Exception {
		_sequenceWriter.writeAll(items);
	}

	private final OutputStream _outputStream;
	private final SequenceWriter _sequenceWriter;

}