org.nfunk.jep.function
Interface PostfixMathCommandI

All Known Subinterfaces:

BinaryOperatorI, NaryOperatorI, UnaryOperatorI

All Known Implementing Classes:

Ele, ExteriorProduct, MAdd, MDot, MIf, MList, MMultiply, MPower, MSubtract, MUMinus, PostfixMathCommand, VList

public interface PostfixMathCommandI

All function classes must implement this interface to ensure that the run() method is implemented.

Method Summary

int	getNumberOfParameters() Returns the number of required parameters, or -1 if any number of parameters is allowed.
void	run(java.util.Stack aStack) Run the function on the stack.
void	setCurNumberOfParameters(int n) Sets the number of current number of parameters used in the next call of run().

Method Detail

run

public void run(java.util.Stack aStack)
         throws ParseException

Run the function on the stack. Pops the arguments from the stack, and pushes the result on the top of the stack.

Throws:

ParseException

getNumberOfParameters

public int getNumberOfParameters()

Returns the number of required parameters, or -1 if any number of parameters is allowed.

setCurNumberOfParameters

public void setCurNumberOfParameters(int n)

Sets the number of current number of parameters used in the next call of run(). This method is only called when the reqNumberOfParameters is -1.