com.wxk.util.DateFormatter.java Source code

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Here is the source code for com.wxk.util.DateFormatter.java

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/*
 * This project constitutes a work of the United States Government and is
 * not subject to domestic copyright protection under 17 USC  105.
 * 
 * However, because the project utilizes code licensed from contributors
 * and other third parties, it therefore is licensed under the MIT
 * License.  http://opensource.org/licenses/mit-license.php.  Under that
 * license, permission is 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 conditions that any appropriate copyright notices and this
 * permission notice are 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.
 */

/*******************************************************************************
 *  Copyright (c) 2011 GitHub Inc.
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  which accompanies this distribution, and is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 *
 *  Contributors:
 *    Kevin Sawicki (GitHub Inc.) - initial API and implementation
 *******************************************************************************/

package com.wxk.util;

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 java.lang.reflect.Type;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

public class DateFormatter implements JsonDeserializer<Date>, JsonSerializer<Date> {

    private final DateFormat[] formats;

    /**
     * Create date formatter
     */
    public DateFormatter() {
        formats = new DateFormat[1];
        formats[0] = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
        final TimeZone timeZone = TimeZone.getTimeZone("Zulu"); //$NON-NLS-1$
        for (DateFormat format : formats) {
            format.setTimeZone(timeZone);
        }
    }

    public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        JsonParseException exception = null;
        final String value = json.getAsString();
        for (DateFormat format : formats) {
            try {
                synchronized (format) {
                    return format.parse(value);
                }
            } catch (ParseException e) {
                exception = new JsonParseException(e);
            }
        }
        throw exception;
    }

    public JsonElement serialize(Date date, Type type, JsonSerializationContext context) {
        final DateFormat primary = formats[0];
        String formatted;
        synchronized (primary) {
            formatted = primary.format(date);
        }
        return new JsonPrimitive(formatted);
    }
}