jodd.datetime.format
Class AbstractFormatter

java.lang.Object
  jodd.datetime.format.AbstractFormatter

All Implemented Interfaces:

JdtFormatter

Direct Known Subclasses:

Iso8601JdtFormatter

public abstract class AbstractFormatter
extends java.lang.Object
implements JdtFormatter

Abstract formatter for easier JdtFormatter implementations.

For setting date and time, default formatter parses input String against specified format. It extracts parts of input string upon patterns and then each part is converted to a number for a date/time information. It doesn't ignore any non-number character. If conversion fails, null is returned.

Getting date time is also user friendly. Specified format may not only contains patterns but also any text. To remove errors in decoding when text may be recognize as one of patterns, format text may be quoted with the special escape sign. Double quote in the text will be decoded as a single quote, of course.

It is not necessary to have parsers for all patterns.

Field Summary

protected char	escapeChar Escape character.
protected char[][]	patterns Available patterns list.

Constructor Summary

AbstractFormatter()

Method Summary

java.lang.String	convert(JDateTime jdt, java.lang.String format) Converts date time to a string using specified format.
protected abstract java.lang.String	convertPattern(int patternIndex, JDateTime jdt) Creates a date-time string for founded pattern.
protected int	findPattern(char[] format, int i) Finds the longest pattern in provided format starting from specified position.
DateTimeStamp	parse(java.lang.String value, java.lang.String format) Parses string given in specified format and extracts time information.
protected abstract void	parseValue(int patternIndex, java.lang.String value, DateTimeStamp destination) Parses value for matched pattern.
protected void	preparePatterns(java.lang.String[] spat) Converts String array of patterns to char arrays.
protected java.lang.String	print2(int value) Prints values 00 - 99.
protected java.lang.String	print3(int value) Prints values 00 - 999.
protected java.lang.String	printPad4(int value) Prints 4 digits and optional minus sign.

Methods inherited from class java.lang.Object

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

Field Detail

patterns

protected char[][] patterns

Available patterns list. Used by findPattern(char[], int) when parsing date time format. Each formatter will have its own set of patterns, in strictly defined order.

escapeChar

protected char escapeChar

Escape character.

Constructor Detail

AbstractFormatter

public AbstractFormatter()

Method Detail

preparePatterns

protected void preparePatterns(java.lang.String[] spat)

Converts String array of patterns to char arrays.

findPattern

protected int findPattern(char[] format,
                          int i)

Finds the longest pattern in provided format starting from specified position. All available patterns are stored in patterns.

Parameters:

format - date time format to examine

i - starting index

Returns:

0-based index of founded pattern, or -1 if pattern not found

convertPattern

protected abstract java.lang.String convertPattern(int patternIndex,
                                                   JDateTime jdt)

Creates a date-time string for founded pattern. Founded patterns is identified by its patterns index.

Parameters:

patternIndex - index of founded pattern

jdt - date time information

convert

public java.lang.String convert(JDateTime jdt,
                                java.lang.String format)

Converts date time to a string using specified format.

Specified by:

convert in interface JdtFormatter

Parameters:

jdt - JDateTime to read from

format - format

Returns:

formatted string with date time information

See Also:

JdtFormatter.convert(JDateTime, String)

parseValue

protected abstract void parseValue(int patternIndex,
                                   java.lang.String value,
                                   DateTimeStamp destination)

Parses value for matched pattern. Founded patterns is identified by its patterns index. Note that value may represent both integer and decimals. May throw NumberFormatException.

Parameters:

patternIndex - index of founded pattern

value - value to parse, no spaces or tabs

destination - destination to modify

parse

public DateTimeStamp parse(java.lang.String value,
                           java.lang.String format)

Parses string given in specified format and extracts time information. It returns a new instance of DateTimeStamp or null if error occurs.

Specified by:

parse in interface JdtFormatter

Parameters:

value - string containing date time values

format - format

Returns:

DateTimeStamp instance with populated data

See Also:

JdtFormatter.parse(String, String)

print2

protected java.lang.String print2(int value)

Prints values 00 - 99.

print3

protected java.lang.String print3(int value)

Prints values 00 - 999.

printPad4

protected java.lang.String printPad4(int value)

Prints 4 digits and optional minus sign.