com.jgoodies.common.format

Class EmptyNumberFormat

java.lang.Object

java.text.Format

java.text.NumberFormat

com.jgoodies.common.format.EmptyNumberFormat

All Implemented Interfaces:

Serializable, Cloneable

public final class EmptyNumberFormat
extends NumberFormat

Wraps a given NumberFormat and adds behavior to convert to/fro the empty string. Therefore it holds an empty value that i mapped to/from the empty string. The #format resul of the empty value is the empty string, and the #parseExamples:

Author:

Karsten Lentzsch

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.text.NumberFormat

NumberFormat.Field

Field Summary

Fields inherited from class java.text.NumberFormat

FRACTION_FIELD, INTEGER_FIELD

Constructor Summary

Constructors

Constructor and Description
EmptyNumberFormat(NumberFormat delegate) Constructs an EmptyNumberFormat that wraps the given mandatory forma to convert null to the empty string and vice versa.
EmptyNumberFormat(NumberFormat delegate, int emptyValue) Constructs an EmptyNumberFormat that wraps the given mandatory forma to convert the given emptyValue to the empty strin and vice versa.
EmptyNumberFormat(NumberFormat delegate, Number emptyValue) Constructs an EmptyNumberFormat that wraps the given mandatory forma to convert the given emptyValue to the empty strin and vice versa.

Method Summary

Methods

Modifier and Type	Method and Description
StringBuffer	format(double number, StringBuffer toAppendTo, FieldPosition pos)
StringBuffer	format(long number, StringBuffer toAppendTo, FieldPosition pos)
StringBuffer	format(Object obj, StringBuffer toAppendTo, FieldPosition pos) obj is equal to the emptyValue toAppendTo is returned.
Number	parse(String source) source is empty or whitespace, the emptyValue
Number	parse(String source, ParsePosition pos)
Object	parseObject(String source) source is empty or whitespace, the emptyValue

Methods inherited from class java.text.NumberFormat

clone, equals, format, format, getAvailableLocales, getCurrency, getCurrencyInstance, getCurrencyInstance, getInstance, getInstance, getIntegerInstance, getIntegerInstance, getMaximumFractionDigits, getMaximumIntegerDigits, getMinimumFractionDigits, getMinimumIntegerDigits, getNumberInstance, getNumberInstance, getPercentInstance, getPercentInstance, getRoundingMode, hashCode, isGroupingUsed, isParseIntegerOnly, parseObject, setCurrency, setGroupingUsed, setMaximumFractionDigits, setMaximumIntegerDigits, setMinimumFractionDigits, setMinimumIntegerDigits, setParseIntegerOnly, setRoundingMode

Methods inherited from class java.text.Format

format, formatToCharacterIterator

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EmptyNumberFormat

public EmptyNumberFormat(NumberFormat delegate)

Constructs an EmptyNumberFormat that wraps the given mandatory forma to convert null to the empty string and vice versa.

Parameters:

delegate - the format that handles the standard cases

Throws:

NullPointerException - if delegate is null

EmptyNumberFormat

public EmptyNumberFormat(NumberFormat delegate,
                 int emptyValue)

Constructs an EmptyNumberFormat that wraps the given mandatory forma to convert the given emptyValue to the empty strin and vice versa.

Parameters:

delegate - the format that handles non-null values

emptyValue - the representation of the empty string

Throws:

NullPointerException - if delegate is null

EmptyNumberFormat

public EmptyNumberFormat(NumberFormat delegate,
                 Number emptyValue)

Constructs an EmptyNumberFormat that wraps the given mandatory forma to convert the given emptyValue to the empty strin and vice versa.

Parameters:

delegate - the format that handles non-null values

emptyValue - the representation of the empty string

Throws:

NullPointerException - if delegate is null

Method Detail

format

public StringBuffer format(Object obj,
                  StringBuffer toAppendTo,
                  FieldPosition pos)

obj is equal to the emptyValue toAppendTo is returned. Otherwise the forma is forwarded to the delegate.

Overrides:

format in class NumberFormat

format

public StringBuffer format(double number,
                  StringBuffer toAppendTo,
                  FieldPosition pos)

Specified by:

format in class NumberFormat

format

public StringBuffer format(long number,
                  StringBuffer toAppendTo,
                  FieldPosition pos)

Specified by:

format in class NumberFormat

parseObject

public Object parseObject(String source)
                   throws ParseException

source is empty or whitespace, the emptyValueparse(String, ParsePosition).

Overrides:

parseObject in class Format

Throws:

ParseException

parse

public Number parse(String source)
             throws ParseException

source is empty or whitespace, the emptyValueparse(String, ParsePosition).

Overrides:

parse in class NumberFormat

Throws:

ParseException

parse

public Number parse(String source,
           ParsePosition pos)

Specified by:

parse in class NumberFormat