Java tutorial
/* 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.Set; 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 sets 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 LeanBaseModelSetSerializer extends JsonSerializer<Set> { @Override public void serialize(Set set, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonProcessingException { jgen.writeStartArray(); for (Iterator iterator = set.iterator(); iterator.hasNext();) { BaseModelInterface object = (BaseModelInterface) iterator.next(); jgen.writeNumber(object.getId()); } jgen.writeEndArray(); } }