org.codehaus.groovy.syntax
Class Numbers

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

public class Numbers
extends java.lang.Object

Helper class for processing Groovy numeric literals.

Version:

$Id: Numbers.java 6778 2007-07-02 10:40:33Z glaforge $

Author:

Brian Larson, Chris Poirier

Field Summary

private static java.math.BigDecimal	MAX_DOUBLE
private static java.math.BigDecimal	MAX_FLOAT
private static java.math.BigInteger	MAX_INTEGER
private static java.math.BigInteger	MAX_LONG
private static java.math.BigDecimal	MIN_DOUBLE
private static java.math.BigDecimal	MIN_FLOAT
private static java.math.BigInteger	MIN_INTEGER
private static java.math.BigInteger	MIN_LONG

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 java.lang.Number	parseDecimal(java.lang.String text) Builds a Number from the given decimal descriptor.
static java.lang.Number	parseInteger(java.lang.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

Field Detail

MAX_LONG

private static final java.math.BigInteger MAX_LONG

MIN_LONG

private static final java.math.BigInteger MIN_LONG

MAX_INTEGER

private static final java.math.BigInteger MAX_INTEGER

MIN_INTEGER

private static final java.math.BigInteger MIN_INTEGER

MAX_DOUBLE

private static final java.math.BigDecimal MAX_DOUBLE

MIN_DOUBLE

private static final java.math.BigDecimal MIN_DOUBLE

MAX_FLOAT

private static final java.math.BigDecimal MAX_FLOAT

MIN_FLOAT

private static final java.math.BigDecimal MIN_FLOAT

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 java.lang.Number parseInteger(java.lang.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:

java.lang.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 java.lang.Number parseDecimal(java.lang.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:

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