Package org.jruby.util

Class SafeDoubleParser

java.lang.Object
org.jruby.util.SafeDoubleParser
public final class SafeDoubleParser extends Object
A safer way to parse double values

Prevents brute force attacks using the famous Java bug.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected static final BigDecimal
    LOWER
    Lower allowed value
    protected static final BigDecimal
    MIDDLE
    The middle of the bad interval - used for rounding bad values
    protected static final BigDecimal
    TWO
    Constant 2
    protected static final BigDecimal
    UPPER
    Upper allowed value

  • Constructor Summary

    Constructors
    Constructor
    Description
    SafeDoubleParser()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    protected static final double
    decimalValue(Number number)
    Safe way of getting the double value
    prevents BigDecimal from calling Double.parseDouble()
    protected static final double
    decimalValue(BigDecimal bigDecimal)
    Safe way of getting the double value
    Prevents BigDecimal from calling Double.parseDouble()
    protected static final Double
    decimalValueOf(String s)
    Safe parsing of a String into a Double
    static double
    doubleValue(Number number)
    Safe way of getting the double value
    prevents BigDecimal from calling Double.parseDouble()
    static double
    doubleValue(BigDecimal bigDecimal)
    Safe way of getting the double value
    Prevents BigDecimal from calling Double.parseDouble()
    protected static final boolean
    isSuspicious(String s)
    Heuristic test if we should look closer at the value
    static Double
    parseDouble(String s)
    Safe way of parsing a Double value from a String
    static Double
    valueOf(String s)
    Safe way of parsing a Double value from a String

    Methods inherited from class java.lang.Object

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

  • Field Details

    • TWO

      protected static final BigDecimal TWO
      Constant 2

    • LOWER

      protected static final BigDecimal LOWER
      Lower allowed value

    • UPPER

      protected static final BigDecimal UPPER
      Upper allowed value

    • MIDDLE

      protected static final BigDecimal MIDDLE
      The middle of the bad interval - used for rounding bad values

  • Constructor Details

    • SafeDoubleParser

      public SafeDoubleParser()

  • Method Details

    • valueOf

      public static Double valueOf(String s)
      Safe way of parsing a Double value from a String
      Parameters:
      s - The input String
      Returns:
      the Double value

    • parseDouble

      public static Double parseDouble(String s)
      Safe way of parsing a Double value from a String
      Parameters:
      s - The input String
      Returns:
      the Double value

    • doubleValue

      public static double doubleValue(Number number)
      Safe way of getting the double value
      prevents BigDecimal from calling Double.parseDouble()
      Parameters:
      number -
      Returns:
      the double value

    • doubleValue

      public static double doubleValue(BigDecimal bigDecimal)
      Safe way of getting the double value
      Prevents BigDecimal from calling Double.parseDouble()
      Parameters:
      bigDecimal -
      Returns:
      the double value

    • isSuspicious

      protected static final boolean isSuspicious(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 Double decimalValueOf(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(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(BigDecimal bigDecimal)
      Safe way of getting the double value
      Prevents BigDecimal from calling Double.parseDouble()
      Parameters:
      bigDecimal -
      Returns:
      the double value