Java tutorial
/* * Copyright (C) 2016 Fraunhofer Institut IOSB, Fraunhoferstr. 1, D 76131 * Karlsruhe, Germany. * * This program 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 3 of the License, or * (at your option) any later version. * * This program 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. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package de.fraunhofer.iosb.ilt.sta.serialize; 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.fraunhofer.iosb.ilt.sta.formatter.DataArrayResult; import java.io.IOException; /** * * @author jab */ public class DataArrayResultSerializer extends JsonSerializer<DataArrayResult> { @Override public void serialize(DataArrayResult value, JsonGenerator gen, SerializerProvider serializers) throws IOException, JsonProcessingException { gen.writeStartObject(); long count = value.getCount(); if (count >= 0) { gen.writeNumberField("@iot.count", count); } String nextLink = value.getNextLink(); if (nextLink != null) { gen.writeStringField("@iot.nextLink", nextLink); } gen.writeFieldName("value"); gen.writeObject(value.getValue()); gen.writeEndObject(); } @Override public boolean isEmpty(SerializerProvider provider, DataArrayResult value) { return (value == null || value.getValue() == null || value.getValue().isEmpty()); } }