de.m0ep.canvas.gson.ISO8601TypeAdapter.java Source code

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Here is the source code for de.m0ep.canvas.gson.ISO8601TypeAdapter.java

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/*
 * The MIT License (MIT) Copyright  2013 Florian Mller
 * 
 * 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 de.m0ep.canvas.gson;

import java.io.IOException;
import java.util.Calendar;
import java.util.Date;

import javax.xml.bind.DatatypeConverter;

import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;

/**
 * Typeadapter for GSON to convert the Canvas date format to a Java {@link Date}
 * object.
 * 
 * @author Florian Mller
 * 
 */
public class ISO8601TypeAdapter extends TypeAdapter<Date> {

    @Override
    public Date read(JsonReader reader) throws IOException {
        if (JsonToken.NULL == reader.peek()) {
            reader.nextNull();
            return null;
        }

        String date = reader.nextString();
        Calendar cal = DatatypeConverter.parseDateTime(date);
        return cal.getTime();
    }

    @Override
    public void write(JsonWriter writer, Date value) throws IOException {
        if (value == null) {
            writer.nullValue();
            return;
        }

        Calendar cal = Calendar.getInstance();
        cal.setTime(value);
        String isoString = DatatypeConverter.printDateTime(cal);
        writer.value(isoString);
    }
}