com.liferay.batch.engine.internal.writer.ObjectWriterFactory 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.annotation.JsonInclude;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectWriter;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.ser.impl.SimpleBeanPropertyFilter;
import com.fasterxml.jackson.databind.ser.impl.SimpleFilterProvider;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 * @author Ivica Cardic
 */
public class ObjectWriterFactory {

	public static ObjectWriter getObjectWriter(
		Set allFieldNames, List includeFieldNames) {

		SimpleFilterProvider simpleFilterProvider = new SimpleFilterProvider();

		if (includeFieldNames.isEmpty()) {
			simpleFilterProvider.setFailOnUnknownId(false);
		}
		else {
			Set excludeFieldNames = new HashSet<>(allFieldNames);

			excludeFieldNames.removeAll(includeFieldNames);

			SimpleBeanPropertyFilter simpleBeanPropertyFilter =
				SimpleBeanPropertyFilter.serializeAllExcept(excludeFieldNames);

			simpleFilterProvider.addFilter(
				"Liferay.Vulcan", simpleBeanPropertyFilter);
		}

		return _objectMapper.writer(simpleFilterProvider);
	}

	private static final ObjectMapper _objectMapper = new ObjectMapper() {
		{
			disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
			enable(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY);
			enable(SerializationFeature.ORDER_MAP_ENTRIES_BY_KEYS);
			setSerializationInclusion(JsonInclude.Include.NON_NULL);
		}
	};

}