DateAdapter.java

/*
 * Copyright 2016 Jon Ander Peñalba
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.mobile.api;

import com.squareup.moshi.FromJson;
import com.squareup.moshi.JsonDataException;
import com.squareup.moshi.ToJson;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

public class DateAdapter {
    private final DateFormat[] formats = new DateFormat[3];

    public DateAdapter() {
        formats[0] = new SimpleDateFormat("yyyy-MM-dd\'T\'HH:mm:ss\'Z\'");
        formats[1] = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss Z");
        formats[2] = new SimpleDateFormat("yyyy-MM-dd\'T\'HH:mm:ss");
        final TimeZone timeZone = TimeZone.getTimeZone("Zulu");
        for (DateFormat format : formats) {
            format.setTimeZone(timeZone);
        }
    }

    @ToJson
    String toJson(Date date) {
        return formats[0].format(date);
    }

    @FromJson
    Date fromJson(String date) {
        for (DateFormat format : formats) {
            try {
                return format.parse(date);
            } catch (ParseException e) {
            }
        }

        throw new JsonDataException();
    }
}