Package org.apache.calcite.util

Class NumberUtil

  • public class NumberUtil
extends java.lang.Object
    Utility functions for working with numbers.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private NumberUtil()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.Double add​(java.lang.Double a, java.lang.Double b)  
      static java.text.DecimalFormat decimalFormat​(java.lang.String pattern)
      Creates a format.
      static java.lang.Double divide​(java.lang.Double a, java.lang.Double b)  
      static java.text.NumberFormat getApproxFormatter​(boolean isFloat)  
      static java.math.BigInteger getMaxUnscaled​(int precision)  
      static java.math.BigInteger getMinUnscaled​(int precision)  
      static boolean isValidDecimal​(java.math.BigDecimal bd)  
      static java.lang.Double min​(java.lang.Double a, java.lang.Double b)
      Like Math.min(int, int) but null safe.
      static java.lang.Double multiply​(java.lang.Double a, java.lang.Double b)  
      static java.math.BigInteger powTen​(int exponent)  
      static java.math.BigDecimal rescaleBigDecimal​(java.math.BigDecimal bd, int scale)  
      static long round​(double d)  
      static java.math.BigDecimal toBigDecimal​(java.lang.Number number)  
      static java.math.BigDecimal toBigDecimal​(java.lang.Number number, int scale)  

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • FLOAT_FORMATTER

        private static final java.text.DecimalFormat FLOAT_FORMATTER

      • DOUBLE_FORMATTER

        private static final java.text.DecimalFormat DOUBLE_FORMATTER

      • BIG_INT_TEN_POW

        private static final java.math.BigInteger[] BIG_INT_TEN_POW

      • BIG_INT_MIN_UNSCALED

        private static final java.math.BigInteger[] BIG_INT_MIN_UNSCALED

      • BIG_INT_MAX_UNSCALED

        private static final java.math.BigInteger[] BIG_INT_MAX_UNSCALED

    • Constructor Detail

      • NumberUtil

        private NumberUtil()

    • Method Detail

      • decimalFormat

        public static java.text.DecimalFormat decimalFormat​(java.lang.String pattern)
        Creates a format. Locale-independent.

      • powTen

        public static java.math.BigInteger powTen​(int exponent)

      • getMaxUnscaled

        public static java.math.BigInteger getMaxUnscaled​(int precision)

      • getMinUnscaled

        public static java.math.BigInteger getMinUnscaled​(int precision)

      • rescaleBigDecimal

        public static java.math.BigDecimal rescaleBigDecimal​(java.math.BigDecimal bd,
                                                     int scale)

      • toBigDecimal

        public static java.math.BigDecimal toBigDecimal​(java.lang.Number number,
                                                int scale)

      • toBigDecimal

        public static java.math.BigDecimal toBigDecimal​(java.lang.Number number)

      • isValidDecimal

        public static boolean isValidDecimal​(java.math.BigDecimal bd)
        Returns:
        whether a BigDecimal is a valid Farrago decimal. If a BigDecimal's unscaled value overflows a long, then it is not a valid Farrago decimal.

      • getApproxFormatter

        public static java.text.NumberFormat getApproxFormatter​(boolean isFloat)

      • round

        public static long round​(double d)

      • add

        public static java.lang.Double add​(java.lang.Double a,
                                   java.lang.Double b)

      • divide

        public static java.lang.Double divide​(java.lang.Double a,
                                      java.lang.Double b)

      • multiply

        public static java.lang.Double multiply​(java.lang.Double a,
                                        java.lang.Double b)

      • min

        public static java.lang.Double min​(java.lang.Double a,
                                   java.lang.Double b)
        Like Math.min(int, int) but null safe.