com.animedetour.api.sched.deserialization.PanelDateDeserializer.java Source code

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Here is the source code for com.animedetour.api.sched.deserialization.PanelDateDeserializer.java

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/*
 * This file is part of the Anime Detour Android application
 *
 * Copyright (c) 2014 Anime Twin Cities, Inc.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
package com.animedetour.api.sched.deserialization;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import org.joda.time.ReadableInstant;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

import java.io.IOException;

/**
 * Panel Date Deserializer
 *
 * This deserializes the format of the panel start and end dates from their
 * `yyyy-mm-dd HH:mm:ss` format into a Joda DateTime object
 *
 * @author Maxwell Vandervelde (Max@MaxVandervelde.com)
 */
public class PanelDateDeserializer extends JsonDeserializer<ReadableInstant> {
    @Override
    public ReadableInstant deserialize(JsonParser parser, DeserializationContext context)
            throws IOException, JsonProcessingException {
        JsonToken token = parser.getCurrentToken();

        if (token != JsonToken.VALUE_STRING) {
            throw context.mappingException("Expected string value for date");
        }

        String value = parser.getText().trim();

        if (value.length() == 0) {
            return null;
        }

        DateTimeFormatter formatter = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss");
        return formatter.parseDateTime(value);
    }
}