Java tutorial
/** * Copyright (c) 2012 Concurrency and Mobility Group. * Universita' di Firenze * * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Michele Loreti */ package org.cmg.jresp.json; import java.lang.reflect.Type; import org.cmg.jresp.knowledge.Attribute; import com.google.gson.JsonDeserializationContext; import com.google.gson.JsonDeserializer; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonParseException; /** * This class is used to deserialize an {@link Attribute} from a * {@link JsonElement} (see {@link JsonDeserializer}). * * @author Michele Loreti * */ public class AttributeDeserializer implements JsonDeserializer<Attribute> { @Override public Attribute deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { if (!json.isJsonObject()) { throw new JsonParseException("Unexpected JsonElement!"); } JsonObject jo = (JsonObject) json; if ((!jo.has("name")) || (!jo.has("value"))) { throw new JsonParseException("Required attributes are not available!"); } return new Attribute(jo.get("name").getAsString(), SCELJsonUtil.objectFromJson(jo.get("value"), context)); } }