Package org.apache.jackrabbit.core.query.lucene

Class DecimalField

  • public class DecimalField
extends Object
    The DecimalField class is a utility to convert java.math.BigDecimal values to String values that are lexicographically sortable according to the decimal value.

    The string format uses the characters '0' to '9' and consists of: 

     { value signum +2 }
 { exponent signum +2 }
 { exponent length -1 }
 { exponent value }
 { value (-1 if inverted) }
    Only the signum is encoded if the value is zero. The exponent is not encoded if zero. Negative values are "inverted" character by character ('0' -> 9, '1' -> '8', and so on). The same applies to the exponent.

    Examples: 0 => "2" 2 => "322" (signum 1; exponent 0; value 2) 120 => "330212" (signum 1; exponent signum 1, length 1, value 2; value 12). -1 => "179" (signum -1, rest inverted; exponent 0; value 1 (-1, inverted).

    Values between BigDecimal(BigInteger.ONE, Integer.MIN_VALUE) and BigDecimal(BigInteger.ONE, Integer.MAX_VALUE) are supported.

    • Constructor Detail

      • DecimalField

        public DecimalField()

    • Method Detail

      • decimalToString

        public static String decimalToString​(BigDecimal value)
        Convert a BigDecimal to a String.
        Parameters:
        value - the BigDecimal
        Returns:
        the String

      • stringToDecimal

        public static BigDecimal stringToDecimal​(String value)
        Convert a String to a BigDecimal.
        Parameters:
        value - the String
        Returns:
        the BigDecimal