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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.team.internal.ccvs.core.util;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
/**
* Utility class for converting timestamps used in Entry file lines. The format
* required in the Entry file is ISO C asctime() function (Sun Apr 7 01:29:26 1996).
* <p>
* To be compatible with asctime(), the day field in the entryline format is
* padded with a space and not a zero. Most other CVS clients use string comparison
* for timestamps based on the result of the C function asctime().
* </p>
*/
public class CVSDateFormatter {
private static final String ENTRYLINE_FORMAT = "E MMM dd HH:mm:ss yyyy"; //$NON-NLS-1$
private static final String SERVER_FORMAT = "dd MMM yyyy HH:mm:ss";//$NON-NLS-1$
private static final int ENTRYLINE_TENS_DAY_OFFSET = 8;
private static final SimpleDateFormat serverFormat = new SimpleDateFormat(SERVER_FORMAT, Locale.US);
private static SimpleDateFormat entryLineFormat = new SimpleDateFormat(ENTRYLINE_FORMAT, Locale.US);
static {
entryLineFormat.setTimeZone(TimeZone.getTimeZone("GMT")); //$NON-NLS-1$
}
static synchronized public Date serverStampToDate(String text) throws ParseException {
serverFormat.setTimeZone(getTimeZone(text));
Date date = serverFormat.parse(text);
return date;
}
static synchronized public String dateToServerStamp(Date date) {
serverFormat.setTimeZone(TimeZone.getTimeZone("GMT"));//$NON-NLS-1$
return serverFormat.format(date) + " -0000"; //$NON-NLS-1$
}
static synchronized public Date entryLineToDate(String text) throws ParseException {
try {
if (text.charAt(ENTRYLINE_TENS_DAY_OFFSET) == ' ') {
StringBuffer buf = new StringBuffer(text);
buf.setCharAt(ENTRYLINE_TENS_DAY_OFFSET, '0');
text = buf.toString();
}
} catch (StringIndexOutOfBoundsException e) {
throw new ParseException(e.getMessage(), ENTRYLINE_TENS_DAY_OFFSET);
}
return entryLineFormat.parse(text);
}
static synchronized public String dateToEntryLine(Date date) {
if (date == null) return ""; //$NON-NLS-1$
String passOne = entryLineFormat.format(date);
if (passOne.charAt(ENTRYLINE_TENS_DAY_OFFSET) != '0') return passOne;
StringBuffer passTwo = new StringBuffer(passOne);
passTwo.setCharAt(ENTRYLINE_TENS_DAY_OFFSET, ' ');
return passTwo.toString();
}
static synchronized public String dateToNotifyServer(Date date) {
serverFormat.setTimeZone(TimeZone.getTimeZone("GMT"));//$NON-NLS-1$
return serverFormat.format(date) + " GMT"; //$NON-NLS-1$
}
/*
* Converts timezone text from date string from CVS server and
* returns a timezone representing the received timezone.
* Timezone string is of the following format: [-|+]MMSS
*/
static private TimeZone getTimeZone(String dateFromServer) {
String tz = null;
StringBuffer resultTz = new StringBuffer("GMT");//$NON-NLS-1$
if (dateFromServer.indexOf("-") != -1) {//$NON-NLS-1$
resultTz.append("-");//$NON-NLS-1$
tz = dateFromServer.substring(dateFromServer.indexOf("-"));//$NON-NLS-1$
} else if (dateFromServer.indexOf("+") != -1) {//$NON-NLS-1$
resultTz.append('+');
tz = dateFromServer.substring(dateFromServer.indexOf("+"));//$NON-NLS-1$
}
try {
if(tz!=null) {
resultTz.append(tz.substring(1, 3) /*hours*/ + ":" + tz.substring(3, 5) /*minutes*/);//$NON-NLS-1$
return TimeZone.getTimeZone(resultTz.toString());
}
} catch(IndexOutOfBoundsException e) {
return TimeZone.getTimeZone("GMT");//$NON-NLS-1$
}
return TimeZone.getTimeZone("GMT");//$NON-NLS-1$
}
}
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