/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.usergrid.utils;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.SimpleTimeZone;
/**
* Utilities for parsing and formatting dates.
* <p/>
* Note that this class doesn't use static methods because of the synchronization issues with SimpleDateFormat. This
* lets synchronization be done on a per-object level, instead of on a per-class level.
*/
public class DateUtils {
/** ISO 8601 parser */
protected final SimpleDateFormat iso8601DateParser = new SimpleDateFormat( "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'" );
/** Alternate ISO 8601 parser without fractional seconds */
protected final SimpleDateFormat alternateIo8601DateParser = new SimpleDateFormat( "yyyy-MM-dd'T'HH:mm:ss'Z'" );
/** RFC 822 parser */
protected final SimpleDateFormat rfc822DateParser =
new SimpleDateFormat( "EEE, dd MMM yyyy HH:mm:ss z", Locale.US );
/** Constructs a new DateUtils object, ready to parse/format dates. */
public DateUtils() {
iso8601DateParser.setTimeZone( new SimpleTimeZone( 0, "GMT" ) );
rfc822DateParser.setTimeZone( new SimpleTimeZone( 0, "GMT" ) );
alternateIo8601DateParser.setTimeZone( new SimpleTimeZone( 0, "GMT" ) );
}
public static DateUtils instance = new DateUtils();
/**
* Formats the specified date as an ISO 8601 string.
*
* @param date The date to format.
*
* @return The ISO 8601 string representing the specified date.
*/
public String formatIso8601Date( Date date ) {
synchronized ( iso8601DateParser ) {
return iso8601DateParser.format( date );
}
}
public String iso8601DateNow() {
return formatIso8601Date( new Date() );
}
}