Java tutorial
/* * Copyright 2014 Greg Kopff * All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.fatboyindustrial.gsonjavatime; import com.google.gson.JsonDeserializationContext; import com.google.gson.JsonDeserializer; import com.google.gson.JsonElement; import com.google.gson.JsonParseException; import com.google.gson.JsonPrimitive; import com.google.gson.JsonSerializationContext; import com.google.gson.JsonSerializer; import java.lang.reflect.Type; import java.time.ZonedDateTime; import java.time.format.DateTimeFormatter; /** * GSON serialiser/deserialiser for converting {@link ZonedDateTime} objects. */ public class ZonedDateTimeConverter extends FormatableConverter implements JsonSerializer<ZonedDateTime>, JsonDeserializer<ZonedDateTime> { public ZonedDateTimeConverter() { super(); } public ZonedDateTimeConverter(DateTimeFormatter formatter) { super(formatter); } /** * Gson invokes this call-back method during serialization when it encounters a field of the specified type. * <p> * * In the implementation of this call-back method, you should consider invoking * {@link JsonSerializationContext#serialize(Object, Type)} method to create JsonElements for any non-trivial field of the * {@code src} object. However, you should never invoke it on the {@code src} object itself since that will cause an * infinite loop (Gson will call your call-back method again). * * @param src the object that needs to be converted to Json. * @param typeOfSrc the actual type (fully genericized version) of the source object. * @return a JsonElement corresponding to the specified object. */ @Override public JsonElement serialize(ZonedDateTime src, Type typeOfSrc, JsonSerializationContext context) { return new JsonPrimitive(getFormatter().format(src)); } /** * Gson invokes this call-back method during deserialization when it encounters a field of the specified type. * <p> * * In the implementation of this call-back method, you should consider invoking * {@link JsonDeserializationContext#deserialize(JsonElement, Type)} method to create objects for any non-trivial field of * the returned object. However, you should never invoke it on the the same type passing {@code json} since that will cause * an infinite loop (Gson will call your call-back method again). * * @param json The Json data being deserialized * @param typeOfT The type of the Object to deserialize to * @return a deserialized object of the specified type typeOfT which is a subclass of {@code T} * @throws JsonParseException if json is not in the expected format of {@code typeOfT} */ @Override public ZonedDateTime deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { return getFormatter().parse(json.getAsString(), ZonedDateTime::from); } @Override public DateTimeFormatter getDefaultFormatter() { return DateTimeFormatter.ISO_DATE_TIME; } }