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*
* Copyright (c) 1997-2017 Oracle and/or its affiliates. All rights reserved.
*
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* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://oss.oracle.com/licenses/CDDL+GPL-1.1
* or LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
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* file and include the License file at LICENSE.txt.
*
* GPL Classpath Exception:
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* file that accompanied this code.
*
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package com.sun.mail.imap.protocol;
import java.util.Date;
import java.util.TimeZone;
import java.util.Locale;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.text.FieldPosition;
import javax.mail.internet.MailDateFormat;
import com.sun.mail.iap.*;
/**
* An INTERNALDATE FETCH item.
*
* @author John Mani
*/
public class INTERNALDATE implements Item {
static final char[] name =
{'I','N','T','E','R','N','A','L','D','A','T','E'};
public int msgno;
protected Date date;
/*
* Used to parse dates only. The parse method is thread safe
* so we only need to create a single object for use by all
* instances. We depend on the fact that the MailDateFormat
* class will parse dates in INTERNALDATE format as well as
* dates in RFC 822 format.
*/
private static final MailDateFormat mailDateFormat = new MailDateFormat();
/**
* Constructor.
*
* @param r the FetchResponse
* @exception ParsingException for parsing failures
*/
public INTERNALDATE(FetchResponse r) throws ParsingException {
msgno = r.getNumber();
r.skipSpaces();
String s = r.readString();
if (s == null)
throw new ParsingException("INTERNALDATE is NIL");
try {
synchronized (mailDateFormat) {
date = mailDateFormat.parse(s);
}
} catch (ParseException pex) {
throw new ParsingException("INTERNALDATE parse error");
}
}
public Date getDate() {
return date;
}
// INTERNALDATE formatter
private static SimpleDateFormat df =
// Need Locale.US, the "MMM" field can produce unexpected values
// in non US locales !
new SimpleDateFormat("dd-MMM-yyyy HH:mm:ss ", Locale.US);
/**
* Format given Date object into INTERNALDATE string
*
* @param d the Date
* @return INTERNALDATE string
*/
public static String format(Date d) {
/*
* SimpleDateFormat objects aren't thread safe, so rather
* than create a separate such object for each request,
* we create one object and synchronize its use here
* so that only one thread is using it at a time. This
* trades off some potential concurrency for speed in the
* common case.
*
* This method is only used when formatting the date in a
* message that's being appended to a folder.
*/
StringBuffer sb = new StringBuffer();
synchronized (df) {
df.format(d, sb, new FieldPosition(0));
}
// compute timezone offset string
TimeZone tz = TimeZone.getDefault();
int offset = tz.getOffset(d.getTime()); // get offset from GMT
int rawOffsetInMins = offset / 60 / 1000; // offset from GMT in mins
if (rawOffsetInMins < 0) {
sb.append('-');
rawOffsetInMins = (-rawOffsetInMins);
} else
sb.append('+');
int offsetInHrs = rawOffsetInMins / 60;
int offsetInMins = rawOffsetInMins % 60;
sb.append(Character.forDigit((offsetInHrs/10), 10));
sb.append(Character.forDigit((offsetInHrs%10), 10));
sb.append(Character.forDigit((offsetInMins/10), 10));
sb.append(Character.forDigit((offsetInMins%10), 10));
return sb.toString();
}
}
