LeanBaseModelListSerializer.java

/* Copyright (c) 2012-2014, terrestris GmbH & Co. KG
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * (This is the BSD 3-Clause, sometimes called 'BSD New' or 'BSD Simplified',
 * see http://opensource.org/licenses/BSD-3-Clause)
 */
package de.terrestris.shogun.serializer;

import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;

import de.terrestris.shogun.model.BaseModelInterface;

/**
 * A serializer that takes lists of instances of {@link BaseModelInterface}
 * and returns a an array of the ids of the instances as serialisation value.
 *
 * @author terrestris GmbH & Co. KG
 *
 */
@SuppressWarnings("rawtypes")
public class LeanBaseModelListSerializer extends JsonSerializer<List> {

	@Override
	public void serialize(List list, JsonGenerator jgen,
			SerializerProvider provider) throws IOException,
			JsonProcessingException {
		jgen.writeStartArray();
		for (Iterator iterator = list.iterator(); iterator.hasNext();) {
			BaseModelInterface object = (BaseModelInterface) iterator.next();
			jgen.writeNumber(object.getId());
		}
		jgen.writeEndArray();
	}

}