org.zkoss.zssex.formula

Class ELEvalFunction

java.lang.Object

org.zkoss.zssex.formula.ELEvalFunction

All Implemented Interfaces:

java.io.Serializable, FreeRefFunction, Function

public class ELEvalFunction
extends java.lang.Object
implements Function, FreeRefFunction, java.io.Serializable

This the default function that delegate the POI function call to EL tld function.

Author:

henrichen, dennischen

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ELEvalFunction(java.lang.String name)

Method Summary

Modifier and Type	Method and Description
ValueEval	evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex)
ValueEval	evaluate(ValueEval[] args, OperationEvaluationContext ec)
boolean	hasFunction() Check if the mapped function is exist

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ELEvalFunction

public ELEvalFunction(java.lang.String name)

Method Detail

hasFunction

public boolean hasFunction()

Check if the mapped function is exist

evaluate

public ValueEval evaluate(ValueEval[] args,
                          int srcRowIndex,
                          int srcColumnIndex)

Specified by:

evaluate in interface Function

Parameters:

args - the evaluated function arguments. Empty values are represented with BlankEval or MissingArgEval, never null.

srcRowIndex - row index of the cell containing the formula under evaluation

srcColumnIndex - column index of the cell containing the formula under evaluation

Returns:

The evaluated result, possibly an ErrorEval, never null. Note - Excel uses the error code #NUM! instead of IEEE NaN, so when numeric functions evaluate to Double.NaN be sure to translate the result to ErrorEval.NUM_ERROR.

evaluate

public ValueEval evaluate(ValueEval[] args,
                          OperationEvaluationContext ec)

Specified by:

evaluate in interface FreeRefFunction

Parameters:

args - the pre-evaluated arguments for this function. args is never null, nor are any of its elements.

ec - primarily used to identify the source cell containing the formula being evaluated. may also be used to dynamically create reference evals.

Returns:

never null. Possibly an instance of ErrorEval in the case of a specified Excel error (Exceptions are never thrown to represent Excel errors).