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The UA Connect Java client library

There is a newer version: 5.4.2

/*
Copyright 2015 Urban Airship and Contributors
*/

package com.urbanairship.connect.client.model.responses;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;

import java.lang.reflect.Type;

public class DateTimeAdapter implements JsonDeserializer, JsonSerializer {


    @Override
    public JsonElement serialize(DateTime src, Type typeOfSrc, JsonSerializationContext context) {
        DateTimeFormatter fmt = ISODateTimeFormat.dateTime();
        return new JsonPrimitive(fmt.print(src));
    }

    @Override
    public DateTime deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) {
        DateTimeFormatter fmt = ISODateTimeFormat.dateTimeParser().withZoneUTC();
        try {
            return fmt.parseDateTime(json.getAsString());
        } catch (Exception e) {
            return new DateTime(json.getAsString()).withZone(DateTimeZone.UTC);
        }
    }
}