yarfraw.utils
Class CommonUtils

java.lang.Object
  yarfraw.utils.CommonUtils

public class CommonUtils
extends Object

Utilities methods.

Author:

jliang

Field Summary

static String	ATOM03_JAXB_CONTEXT
static String	ATOM10_JAXB_CONTEXT
static String	ISO_8601_LVL1_PATTERN
static String	ISO_8601_LVL2_PATTERN
static String	ISO_8601_LVL3_PATTERN
static String	ISO_8601_LVL4_PATTERN
static String	ISO_8601_LVL5_PATTERN
static String	ISO_8601_LVL6_PATTERN
static String	ISO8601DATE_PATTERN
static String	NON_STANDARD_PATTERN1
static String	NON_STANDARD_PATTERN2
static String	NON_STANDARD_PATTERN3
static String	NON_STANDARD_PATTERN4
static String	NON_STANDARD_PATTERN5
static String	NON_STANDARD_PATTERN6
static String	NON_STANDARD_PATTERN7
static String	RFC822DATE_PATTERN
static String	RSS10_JAXB_CONTEXT
static String	RSS20_JAXB_CONTEXT

Method Summary

static Integer	calculateTtl(UpdatePeriodEnum updatePeriod, BigInteger updateFrequency) calculate the ttl value from updatePeriod and updateFrequency
static String	formatDate(Date date, FeedFormat format) Format a Date object to string based on the input FeedFormat.
static boolean	isDateFormatValid(String dateString, FeedFormat format) Determines whether the input dateString is valid based on the input FeedFormat.
static Date	tryParseDate(String dateString) Parse a date string using both ISO and RFC formats and some non standard formats.

Methods inherited from class java.lang.Object

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

Field Detail

RSS20_JAXB_CONTEXT

public static final String RSS20_JAXB_CONTEXT

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RSS10_JAXB_CONTEXT

public static final String RSS10_JAXB_CONTEXT

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ATOM10_JAXB_CONTEXT

public static final String ATOM10_JAXB_CONTEXT

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ATOM03_JAXB_CONTEXT

public static final String ATOM03_JAXB_CONTEXT

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RFC822DATE_PATTERN

public static final String RFC822DATE_PATTERN

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ISO8601DATE_PATTERN

public static final String ISO8601DATE_PATTERN

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ISO_8601_LVL1_PATTERN

public static final String ISO_8601_LVL1_PATTERN

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ISO_8601_LVL2_PATTERN

public static final String ISO_8601_LVL2_PATTERN

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ISO_8601_LVL3_PATTERN

public static final String ISO_8601_LVL3_PATTERN

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ISO_8601_LVL4_PATTERN

public static final String ISO_8601_LVL4_PATTERN

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ISO_8601_LVL5_PATTERN

public static final String ISO_8601_LVL5_PATTERN

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ISO_8601_LVL6_PATTERN

public static final String ISO_8601_LVL6_PATTERN

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NON_STANDARD_PATTERN1

public static final String NON_STANDARD_PATTERN1

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NON_STANDARD_PATTERN2

public static final String NON_STANDARD_PATTERN2

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NON_STANDARD_PATTERN3

public static final String NON_STANDARD_PATTERN3

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NON_STANDARD_PATTERN4

public static final String NON_STANDARD_PATTERN4

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NON_STANDARD_PATTERN5

public static final String NON_STANDARD_PATTERN5

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NON_STANDARD_PATTERN6

public static final String NON_STANDARD_PATTERN6

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NON_STANDARD_PATTERN7

public static final String NON_STANDARD_PATTERN7

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Method Detail

isDateFormatValid

public static boolean isDateFormatValid(String dateString,
                                        FeedFormat format)

Determines whether the input dateString is valid based on the input FeedFormat.

Parameters:

dateString -

format -

Returns:

tryParseDate

public static Date tryParseDate(String dateString)

Parse a date string using both ISO and RFC formats and some non standard formats.

Parameters:

dateString -

Returns:

Date representation of the input string. null if unable to parse input string.

formatDate

public static String formatDate(Date date,
                                FeedFormat format)

Format a Date object to string based on the input FeedFormat. For Atom 1.0 and RSS 1.0 it will be formatted as ISO8601 Level 5 string.
http://www.w3.org/TR/NOTE-datetime
For RSS 2.0, it will be formatted as RFC 822 date string.
http://www.faqs.org/rfcs/rfc822.html

Parameters:

date - any date

format - any FeedFormat

Returns:

null if either input is null. Formatted date string otherwise.

calculateTtl

public static Integer calculateTtl(UpdatePeriodEnum updatePeriod,
                                   BigInteger updateFrequency)

calculate the ttl value from updatePeriod and updateFrequency

Returns:

null if anything unexpcted occurs