Package org.jruby.util

Class SafeDecimalParser

java.lang.Object
org.jruby.util.SafeDecimalParser
Direct Known Subclasses:
SafeDoubleParser, SafeFloatParser
class SafeDecimalParser extends Object

  • 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

    • UPPER_DOUBLE

      private static final Double UPPER_DOUBLE
      Upper allowed value as Double

    • LOWER_DOUBLE

      private static final Double LOWER_DOUBLE
      Lower allowed value as Double

    • SUSPICIOUS_DIGITS

      private static final String SUSPICIOUS_DIGITS
      Digit sequence to trigger the slow path
      See Also:

  • Constructor Details

    • SafeDecimalParser

      SafeDecimalParser()

  • Method Details

    • 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

    • parseSafely

      private static final Double parseSafely(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 String digits(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(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