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org.apache.cocoon.forms.expression
Class SumFunction

java.lang.Object
  org.outerj.expression.AbstractExpression
      org.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()