Class RoundFunction

java.lang.Object
org.jaxen.function.RoundFunction
All Implemented Interfaces:
Function

public class RoundFunction extends Object implements Function

4.4 number round(number)

The round function returns the number that is closest to the argument and that is an integer. If there are two such numbers, then the one that is closest to positive infinity is returned. If the argument is NaN, then NaN is returned. If the argument is positive infinity, then positive infinity is returned. If the argument is negative infinity, then negative infinity is returned. If the argument is positive zero, then positive zero is returned. If the argument is negative zero, then negative zero is returned. If the argument is less than zero, but greater than or equal to -0.5, then negative zero is returned.
See Also:
  • Constructor Details

    • RoundFunction

      public RoundFunction()
      Create a new RoundFunction object.
  • Method Details

    • call

      public Object call(Context context, List args) throws FunctionCallException
      Returns the nearest integer to the number.
      Specified by:
      call in interface Function
      Parameters:
      context - the context at the point in the expression when the function is called
      args - a list with exactly one item which will be converted to a Double as if by the XPath number() function
      Returns:
      a Double containing the integer nearest to args.get(0)
      Throws:
      FunctionCallException - if args has more or less than one item
    • evaluate

      public static Double evaluate(Object obj, Navigator nav)
      Returns the integer nearest to the argument. If necessary, the argument is first converted to a Double as if by the XPath number() function.
      Parameters:
      obj - the object to be rounded
      nav - ignored
      Returns:
      the integer nearest to obj