Java tutorial
/* * GSON Joda Time Serialisers * * Copyright 2013-2015 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.gsonjodatime; 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 org.joda.time.Instant; import org.joda.time.format.DateTimeFormat; import org.joda.time.format.DateTimeFormatter; import java.lang.reflect.Type; /** * GSON serialiser/deserialiser for converting Joda {@link Instant} objects. */ public class InstantConverter implements JsonSerializer<Instant>, JsonDeserializer<Instant> { private static final String PATTERN = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"; private static final DateTimeFormatter fmt = DateTimeFormat.forPattern(PATTERN).withZoneUTC(); @Override public JsonElement serialize(Instant src, Type typeOfSrc, JsonSerializationContext context) { String value = fmt.print(src); return new JsonPrimitive(value); } @Override public Instant deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { if (json.getAsString() == null || json.getAsString().isEmpty()) { return null; } return Instant.parse(json.getAsString(), fmt); } }