org.codehaus.groovy.syntax
Class Numbers

java.lang.Object
  org.codehaus.groovy.syntax.Numbers

public class Numbers
extends Object

Helper class for processing Groovy numeric literals.

Version:

$Id$

Author:

Brian Larson, Chris Poirier

Constructor Summary

Numbers()

Method Summary

static boolean	isDigit(char c) Returns true if the specified character is a base-10 digit.
static boolean	isHexDigit(char c) Returns true if the specified character is a base-16 digit.
static boolean	isNumericTypeSpecifier(char c, boolean isDecimal) Returns true if the specified character is a valid type specifier for a numeric value.
static boolean	isOctalDigit(char c) Returns true if the specific character is a base-8 digit.
static Number	parseDecimal(String text) Builds a Number from the given decimal descriptor.
static Number	parseInteger(String text) Builds a Number from the given integer descriptor.

Methods inherited from class java.lang.Object

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

Constructor Detail

Numbers

public Numbers()

Method Detail

isDigit

public static boolean isDigit(char c)

Returns true if the specified character is a base-10 digit.

isOctalDigit

public static boolean isOctalDigit(char c)

Returns true if the specific character is a base-8 digit.

isHexDigit

public static boolean isHexDigit(char c)

Returns true if the specified character is a base-16 digit.

isNumericTypeSpecifier

public static boolean isNumericTypeSpecifier(char c,
                                             boolean isDecimal)

Returns true if the specified character is a valid type specifier for a numeric value.

parseInteger

public static Number parseInteger(String text)

Builds a Number from the given integer descriptor. Creates the narrowest type possible, or a specific type, if specified.

Parameters:

text - literal text to parse

Returns:

instantiated Number object

Throws:

NumberFormatException - if the number does not fit within the type requested by the type specifier suffix (invalid numbers don't make it here)

parseDecimal

public static Number parseDecimal(String text)

Builds a Number from the given decimal descriptor. Uses BigDecimal, unless, Double or Float is requested.

Parameters:

text - literal text to parse

Returns:

instantiated Number object

Throws:

NumberFormatException - if the number does not fit within the type requested by the type specifier suffix (invalid numbers don't make it here)