Java tutorial
package org.xacml4j.v30.marshal.json; /* * #%L * Xacml4J Gson Integration * %% * Copyright (C) 2009 - 2014 Xacml4J.org * %% * 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 General Lesser Public License for more details. * * You should have received a copy of the GNU General Lesser Public * License along with this program. If not, see * <http://www.gnu.org/licenses/lgpl-3.0.html>. * #L% */ import java.lang.reflect.Type; import org.xacml4j.v30.Status; import org.xacml4j.v30.StatusCode; import org.xacml4j.v30.StatusDetail; 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; import com.google.gson.JsonSerializationContext; import com.google.gson.JsonSerializer; public class StatusAdapter implements JsonSerializer<Status>, JsonDeserializer<Status> { private static final String STATUS_MESSAGE_PROPERTY = "StatusMessage"; private static final String STATUS_CODE_PROPERTY = "StatusCode"; @Override public Status deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { JsonObject o = json.getAsJsonObject(); StatusDetail detail = null; String statusMessage = GsonUtil.getAsString(o, STATUS_MESSAGE_PROPERTY, null); StatusCode code = context.deserialize(o.get(STATUS_CODE_PROPERTY), StatusCode.class); return Status.builder(code).message(statusMessage).detail(detail).build(); } @Override public JsonElement serialize(Status src, Type typeOfSrc, JsonSerializationContext context) { JsonObject o = new JsonObject(); o.addProperty(STATUS_MESSAGE_PROPERTY, src.getMessage()); // TODO: serialize status detail o.add(STATUS_CODE_PROPERTY, context.serialize(src.getStatusCode())); return o; } }