org.apache.poi.ss.formula.functions

Class Fixed0ArgFunction

java.lang.Object

org.apache.poi.ss.formula.functions.Fixed0ArgFunction

All Implemented Interfaces:

Function, Function0Arg

Direct Known Subclasses:

Na, Now, Today

public abstract class Fixed0ArgFunction
extends java.lang.Object
implements Function0Arg

Convenience base class for functions that only take zero arguments. (仅接受零参数的函数的便利基类。)

Author:

Josh Micich

Constructor Summary

Constructors

Constructor and Description
Fixed0ArgFunction()

Method Summary

Modifier and Type	Method and Description
ValueEval	evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.poi.ss.formula.functions.Function0Arg

evaluate

Constructor Detail

Fixed0ArgFunction

public Fixed0ArgFunction()

Method Detail

evaluate

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

Specified by:

evaluate in interface Function (在接口函数中求值)

Parameters:

args - the evaluated function arguments. Empty values are represented with BlankEval or MissingArgEval, never null. (args - 评估的函数参数。空值用 BlankEval 或 MissingArgEval 表示，绝不为 null。)

srcRowIndex - row index of the cell containing the formula under evaluation (srcRowIndex - 包含计算公式的单元格的行索引)

srcColumnIndex - column index of the cell containing the formula under evaluation (srcColumnIndex - 包含正在评估的公式的单元格的列索引)

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. (评估结果，可能是 ErrorEval，绝不为空。注意 - Excel 使用错误代码 #NUM！而不是 IEEE NaN，因此当数值函数计算为 Double.NaN 时，请务必将结果转换为 ErrorEval.NUM_ERROR。)