Class NumberConverter

java.lang.Object

com.twelvemonkeys.util.convert.NumberConverter

All Implemented Interfaces:

PropertyConverter

Direct Known Subclasses:

DateConverter, TimeConverter

public class NumberConverter
extends Object
implements PropertyConverter

Converts strings to numbers and back.

This class has a static cache of NumberFormats, to avoid creation and parsing of number formats every time one is used.

Version:

$Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/util/convert/NumberConverter.java#2 $

Field Summary

Fields

Modifier and Type	Field	Description
private static final NumberFormat	sDefaultFormat
private static final Map<String,Format>	sFormats
private static final DecimalFormatSymbols	SYMBOLS

Constructor Summary

Constructors

Constructor	Description
NumberConverter()

Method Summary

Modifier and Type	Method	Description
protected final Format	getFormat(Class pFormatterClass, Object... pFormat)
private NumberFormat	getNumberFormat(String pFormat)
Object	toObject(String pString, Class pType, String pFormat)	Converts the string to a number, using the given format for parsing.
String	toString(Object pObject, String pFormat)	Converts the object to a string, using the given format

Methods inherited from class Object

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

Field Details

SYMBOLS

private static final DecimalFormatSymbols SYMBOLS

sDefaultFormat

private static final NumberFormat sDefaultFormat

sFormats

private static final Map<String,Format> sFormats

Constructor Details

NumberConverter

public NumberConverter()

Method Details

toObject

public Object toObject(String pString,
 Class pType,
 String pFormat)
                throws ConversionException

Converts the string to a number, using the given format for parsing.

Specified by:

toObject in interface PropertyConverter

Parameters:

pString - the string to convert.

pType - the type to convert to. PropertyConverter implementations may choose to ignore this parameter.

pFormat - the format used for parsing. PropertyConverter implementations may choose to ignore this parameter. Also, implementations that require a parser format, should provide a default format, and allow null as the format argument.

Returns:

the object created from the given string. May safely be typecast to java.lang.Number or the class of the type parameter.

Throws:

ConversionException

See Also:

• Number
• NumberFormat

toString

public String toString(Object pObject,
 String pFormat)
                throws ConversionException

Converts the object to a string, using the given format

Specified by:

toString in interface PropertyConverter

Parameters:

pObject - the object to convert.

pFormat - the format used for parsing. PropertyConverter implementations may choose to ignore this parameter. Also, implementations that require a parser format, should provide a default format, and allow null as the format argument.

Returns:

the string representation of the object, on the correct format.

Throws:

ConversionException - if the object is not a subclass of Number

getNumberFormat

private NumberFormat getNumberFormat(String pFormat)

getFormat

protected final Format getFormat(Class pFormatterClass,
 Object... pFormat)