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/*
 * DISCLAIMER
 *
 * Copyright 2016 ArangoDB GmbH, Cologne, Germany
 *
 * 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.
 *
 * Copyright holder is ArangoDB GmbH, Cologne, Germany
 */

package com.arangodb.velocypack.internal.util;

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

/**
 * @author Mark Vollmary
 *
 */
public class DateUtil {

	private static final ThreadLocal DATE_FORMAT = new ThreadLocal() {
		@Override
		protected DateFormat initialValue() {
			final SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
			formatter.setTimeZone(TimeZone.getTimeZone("UTC"));
			return formatter;
		}
	};

	private DateUtil() {
		super();
	}

	public static java.util.Date toDate(final byte[] array, final int offset, final int length) {
		final long milliseconds = NumberUtil.toLong(array, offset, length);
		return new java.util.Date(milliseconds);
	}

	public static java.sql.Date toSQLDate(final byte[] array, final int offset, final int length) {
		final long milliseconds = NumberUtil.toLong(array, offset, length);
		return new java.sql.Date(milliseconds);
	}

	public static java.sql.Timestamp toSQLTimestamp(final byte[] array, final int offset, final int length) {
		final long milliseconds = NumberUtil.toLong(array, offset, length);
		return new java.sql.Timestamp(milliseconds);
	}

	public static java.util.Date parse(final String source) throws ParseException {
		return DATE_FORMAT.get().parse(source);
	}

	public static String format(final java.util.Date date) {
		return DATE_FORMAT.get().format(date);
	}

}