org.apache.cocoon.forms.expression
Class SumFunction

java.lang.Object
  extended byorg.outerj.expression.AbstractExpression
      extended byorg.apache.cocoon.forms.expression.SumFunction
All Implemented Interfaces:
org.outerj.expression.Expression

public class SumFunction
extends org.outerj.expression.AbstractExpression

Sum function. This function returns the sum of all of its argument, but it accepts Collections or Iterators as arguments. When it finds such an argument it iterates on all it's values, and try to sum them as well. It accepts String and any instance of Number.


Field Summary
 
Fields inherited from class org.outerj.expression.AbstractExpression
arguments, column, line
 
Constructor Summary
SumFunction()
           
 
Method Summary
 Object evaluate(org.outerj.expression.ExpressionContext context)
           
 String getDescription()
           
 Class getResultType()
           
 
Methods inherited from class org.outerj.expression.AbstractExpression
addArgument, addArgument, check, checkArgument, checkArguments, checkArgumentsOfSameType, checkNoArguments, getColumn, getLine, setPosition
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SumFunction

public SumFunction()
Method Detail

evaluate

public Object evaluate(org.outerj.expression.ExpressionContext context)
                throws org.outerj.expression.ExpressionException
Throws:
org.outerj.expression.ExpressionException

getResultType

public Class getResultType()

getDescription

public String getDescription()


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