velosurf.util
Class FastHttpDateFormat

java.lang.Object
  velosurf.util.FastHttpDateFormat

public class FastHttpDateFormat
extends java.lang.Object

Utility class to generate HTTP dates.

This source code is taken from Tomcat Apache

Author:

Remy Maucherat, Andrey Grebnev <andrey.grebnev@blandware.com>

Field Summary

private static java.lang.String	currentDate Current formatted date.
private static long	currentDateGenerated Instant on which the currentDate object was generated.
private static java.text.SimpleDateFormat	format HTTP date format.
private static java.util.HashMap	formatCache Formatter cache.
private static java.text.SimpleDateFormat[]	formats The set of SimpleDateFormat formats to use in getDateHeader().
private static java.util.TimeZone	gmtZone GMT timezone - all HTTP dates are on GMT
private static java.util.HashMap	parseCache Parser cache.

Constructor Summary

FastHttpDateFormat()

Method Summary

static java.lang.String	formatDate(long value, java.text.DateFormat threadLocalformat) Formats a specified date to HTTP format.
static java.lang.String	getCurrentDate() Gets the current date in HTTP format.
private static java.lang.Long	internalParseDate(java.lang.String value, java.text.DateFormat[] formats) Parses date with given formatters.
static long	parseDate(java.lang.String value, java.text.DateFormat[] threadLocalformats) Tries to parse the given date as an HTTP date.
private static void	updateCache(java.util.HashMap cache, java.lang.Object key, java.lang.Object value) Updates cache.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

format

private static final java.text.SimpleDateFormat format

HTTP date format.

formats

private static final java.text.SimpleDateFormat[] formats

The set of SimpleDateFormat formats to use in getDateHeader().

gmtZone

private static final java.util.TimeZone gmtZone

GMT timezone - all HTTP dates are on GMT

currentDateGenerated

private static long currentDateGenerated

Instant on which the currentDate object was generated.

currentDate

private static java.lang.String currentDate

Current formatted date.

formatCache

private static final java.util.HashMap formatCache

Formatter cache.

parseCache

private static final java.util.HashMap parseCache

Parser cache.

Constructor Detail

FastHttpDateFormat

public FastHttpDateFormat()

Method Detail

getCurrentDate

public static final java.lang.String getCurrentDate()

Gets the current date in HTTP format.

Returns:

Current date in HTTP format

formatDate

public static final java.lang.String formatDate(long value,
                                                java.text.DateFormat threadLocalformat)

Formats a specified date to HTTP format. If local format is not null, it's used instead.

Parameters:

value - Date value to format

threadLocalformat - The format to use (or null -- then HTTP format will be used)

Returns:

Formatted date

parseDate

public static final long parseDate(java.lang.String value,
                                   java.text.DateFormat[] threadLocalformats)

Tries to parse the given date as an HTTP date. If local format list is not null, it's used instead.

Parameters:

value - The string to parse

threadLocalformats - Array of formats to use for parsing. If null, HTTP formats are used.

Returns:

Parsed date (or -1 if error occured)

internalParseDate

private static final java.lang.Long internalParseDate(java.lang.String value,
                                                      java.text.DateFormat[] formats)

Parses date with given formatters.

Parameters:

value - The string to parse

formats - Array of formats to use

Returns:

Parsed date (or null if no formatter mached)

updateCache

private static final void updateCache(java.util.HashMap cache,
                                      java.lang.Object key,
                                      java.lang.Object value)

Updates cache.

Parameters:

cache - Cache to be updated

key - Key to be updated

value - New value