/**
* Copyright 2010 JBoss Inc
*
* 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.
*/
package org.eclipse.webdav.internal.kernel.utils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* A generic date and time object. It uses UTC as the timezone and US as the locale.
*/
public class DateTime {
protected SimpleDateFormat dateFormat;
protected long dateTime;
protected static final String RFC_1123_PATTERN = "EEE, dd MMM yyyy HH:mm:ss 'GMT'"; //$NON-NLS-1$
protected static final String RFC_850_PATTERN = "E, dd-MMM-yyyy HH:mm:ss 'GMT'"; //$NON-NLS-1$
protected static final String ASCTIME_PATTERN = "EEE MMM dd HH:mm:ss yyyy"; //$NON-NLS-1$
protected static final String ISO_8601_UTC_PATTERN = "yyyy-MM-dd'T'HH:mm:ss'Z'"; //$NON-NLS-1$
protected static final String ISO_8601_PATTERN = "yyyy-MM-dd'T'HH:mm:ssz"; //$NON-NLS-1$
protected static final String ISO_8601_UTC_MILLIS_PATTERN = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"; //$NON-NLS-1$
protected static final String ISO_8601_MILLIS_PATTERN = "yyyy-MM-dd'T'HH:mm:ss.SSSz"; //$NON-NLS-1$
public DateTime() {
this(0);
}
/**
* Starts this object from a java long format (milliseconds).
*/
public DateTime(long date) {
setDateTime(date);
dateFormat = new SimpleDateFormat();
dateFormat.setCalendar(Calendar.getInstance(TimeZone.getTimeZone("UTC"), Locale.US)); //$NON-NLS-1$
}
public boolean after(DateTime other) {
return getDateTime() > other.getDateTime();
}
public boolean before(DateTime other) {
return getDateTime() < other.getDateTime();
}
public boolean equals(DateTime other) {
return getDateTime() == other.getDateTime();
}
/**
* Milliseconds since 1 January 1970 0:00 UTC.
*/
public long getDateTime() {
return dateTime;
}
public int getMilliseconds() {
return (int) (getDateTime() % 1000);
}
/**
* Sets the date and time from a java long format (milliseconds).
*/
public void setDateTime(long dateTime) {
this.dateTime = dateTime;
}
/**
* Do nothing if date format is not supported
*/
public void setDateTime(String date) {
String[] patterns = {RFC_1123_PATTERN, ISO_8601_UTC_PATTERN, ISO_8601_UTC_MILLIS_PATTERN, ISO_8601_PATTERN, ISO_8601_MILLIS_PATTERN, RFC_850_PATTERN, ASCTIME_PATTERN};
for (int i = 0; i < patterns.length; i++) {
if (setDateTime(date, patterns[i]))
break;
}
}
/**
* Do nothing if date format is not supported.
*/
protected boolean setDateTime(String date, String pattern) {
boolean dateChanged = true;
dateFormat.applyPattern(pattern);
try {
setDateTime(dateFormat.parse(date));
} catch (ParseException e) {
dateChanged = false;
}
return dateChanged;
}
public void setDateTime(Date date) {
dateTime = date.getTime();
}
public Date toDate() {
return new Date(dateTime);
}
public String toISO8601() {
if (getMilliseconds() == 0)
return toString(ISO_8601_UTC_PATTERN);
return toString(ISO_8601_UTC_MILLIS_PATTERN);
}
public String toRFC1123() {
return toString(RFC_1123_PATTERN);
}
/**
* Returns on a RFC 1123 format.
*/
public String toString() {
return toRFC1123();
}
protected String toString(String pattern) {
dateFormat.applyPattern(pattern);
return dateFormat.format(toDate());
}
}