com.singularsys.jep.functions
Class Sum

java.lang.Object
  extended by com.singularsys.jep.functions.PostfixMathCommand
      extended by com.singularsys.jep.functions.Sum
All Implemented Interfaces:
PostfixMathCommandI, java.io.Serializable

public class Sum
extends PostfixMathCommand

This class serves mainly as an example of a function that accepts any number of parameters. Note that the numberOfParameters is initialized to -1.

See Also:
Serialized Form

Field Summary
 
Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand
curNumberOfParameters, name, NaN, numberOfParameters
 
Constructor Summary
Sum()
          Constructor.
 
Method Summary
 boolean checkNumberOfParameters(int n)
          Must have one or more parameter
 void run(java.util.Stack<java.lang.Object> stack)
          Calculates the result of summing up all parameters.
 
Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand
asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkStack, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Sum

public Sum()
Constructor.

Method Detail

checkNumberOfParameters

public boolean checkNumberOfParameters(int n)
Must have one or more parameter

Specified by:
checkNumberOfParameters in interface PostfixMathCommandI
Overrides:
checkNumberOfParameters in class PostfixMathCommand
Parameters:
n - number of parameters function will be called with.
Returns:
false if an illegal number of parameters is supplied, true otherwise.

run

public void run(java.util.Stack<java.lang.Object> stack)
         throws EvaluationException
Calculates the result of summing up all parameters.

Throws:
EvaluationException


Copyright © 2008 Singular Systems http://www.singularsys.com/jep