org.jruby.util

Class SafeDecimalParser

java.lang.Object

org.jruby.util.SafeDecimalParser

Direct Known Subclasses:

SafeDoubleParser, SafeFloatParser

class SafeDecimalParser
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
protected static java.math.BigDecimal	LOWER Lower allowed value
private static java.lang.Double	LOWER_DOUBLE Lower allowed value as Double
protected static java.math.BigDecimal	MIDDLE The middle of the bad interval - used for rounding bad values
private static java.lang.String	SUSPICIOUS_DIGITS Digit sequence to trigger the slow path
protected static java.math.BigDecimal	TWO Constant 2
protected static java.math.BigDecimal	UPPER Upper allowed value
private static java.lang.Double	UPPER_DOUBLE Upper allowed value as Double

Constructor Summary

Constructors

Constructor and Description
SafeDecimalParser()

Method Summary

Modifier and Type	Method and Description
protected static double	decimalValue(java.math.BigDecimal bigDecimal) Safe way of getting the double value Prevents BigDecimal from calling Double.parseDouble()
protected static double	decimalValue(java.lang.Number number) Safe way of getting the double value prevents BigDecimal from calling Double.parseDouble()
protected static java.lang.Double	decimalValueOf(java.lang.String s) Safe parsing of a String into a Double
private static java.lang.String	digits(java.lang.String s) Extract the digits from a numeric string
private static boolean	isDangerous(java.math.BigDecimal bd) Tests if the value is in the dangerous interval
protected static boolean	isSuspicious(java.lang.String s) Heuristic test if we should look closer at the value
private static java.lang.Double	parseSafely(java.lang.String s) Slow parsing of a suspicious value

Methods inherited from class java.lang.Object

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

Field Detail

TWO

protected static final java.math.BigDecimal TWO

Constant 2

LOWER

protected static final java.math.BigDecimal LOWER

Lower allowed value

UPPER

protected static final java.math.BigDecimal UPPER

Upper allowed value

MIDDLE

protected static final java.math.BigDecimal MIDDLE

The middle of the bad interval - used for rounding bad values

UPPER_DOUBLE

private static final java.lang.Double UPPER_DOUBLE

Upper allowed value as Double

LOWER_DOUBLE

private static final java.lang.Double LOWER_DOUBLE

Lower allowed value as Double

SUSPICIOUS_DIGITS

private static final java.lang.String SUSPICIOUS_DIGITS

Digit sequence to trigger the slow path

See Also:

Constant Field Values

Constructor Detail

SafeDecimalParser

SafeDecimalParser()

Method Detail

isSuspicious

protected static final boolean isSuspicious(java.lang.String s)

Heuristic test if we should look closer at the value

Parameters:

s - The non-null input String

Returns:

true if the value is suspicious, false otherwise

decimalValueOf

protected static final java.lang.Double decimalValueOf(java.lang.String s)

Safe parsing of a String into a Double

Parameters:

s - The input String, can be null

Returns:

The Double value

decimalValue

protected static final double decimalValue(java.lang.Number number)

Safe way of getting the double value
prevents BigDecimal from calling Double.parseDouble()

Parameters:

number -

Returns:

the double value

decimalValue

protected static final double decimalValue(java.math.BigDecimal bigDecimal)

Safe way of getting the double value
Prevents BigDecimal from calling Double.parseDouble()

Parameters:

bigDecimal -

Returns:

the double value

parseSafely

private static final java.lang.Double parseSafely(java.lang.String s)

Slow parsing of a suspicious value

Rounding takes place if the value is inside the bad interval

Parameters:

s - The non-null input String

Returns:

the double value

digits

private static final java.lang.String digits(java.lang.String s)

Extract the digits from a numeric string

Parameters:

s - The non-null String value

Returns:

A String containing only the digits

isDangerous

private static final boolean isDangerous(java.math.BigDecimal bd)

Tests if the value is in the dangerous interval

Parameters:

bd - The big decimal value

Returns:

true if the value is dangerous, false otherwise