Interface  Description 

FreeRefFunction 
For most Excel functions, involving references ((cell, area), (2d, 3d)), the references are
passed in as arguments, and the exact location remains fixed.

Function 
Common interface for all implementations of Excel builtin functions.

Function0Arg 
Implemented by all functions that can be called with zero arguments

Function1Arg 
Implemented by all functions that can be called with one argument

Function2Arg 
Implemented by all functions that can be called with two arguments

Function3Arg 
Implemented by all functions that can be called with three arguments

Function4Arg 
Implemented by all functions that can be called with four arguments

XYNumericFunction.Accumulator 
Class  Description 

Address 
Creates a text reference as text, given specified row and column numbers.

AggregateFunction  
BaseNumberUtils 
Some utils for converting from and to any base

Bin2Dec 
Implementation for Excel Bin2Dec() function.
Syntax: Converts a binary number to decimal. 
BooleanFunction 
Here are the general rules concerning Boolean functions:
Blanks are ignored (not either true or false)
Strings are ignored if part of an area ref or cell ref, otherwise they must be 'true' or 'false'
Numbers: 0 is false.

CalendarFieldFunction 
Implementation of Excel functions Date parsing functions:
Date  DAY, MONTH and YEAR
Time  HOUR, MINUTE and SECOND

Choose  
Code 
Implementation for Excel CODE () function.
Syntax: Returns a numeric code for the first character in a text string. 
Column  
Columns 
Implementation for Excel COLUMNS function.

Complex 
Implementation for Excel COMPLEX () function.
Syntax: Converts real and imaginary coefficients into a complex number of the form x + yi or x + yj. 
Count 
Counts the number of cells that contain numeric data within
the list of arguments.

Counta 
Counts the number of cells that contain data within the list of arguments.

Countblank 
Implementation for the function COUNTBLANK

Countif 
Implementation for the function COUNTIF

Countif.StringMatcher  
Countifs 
Implementation for the function COUNTIFS

DateFunc 
Implementation for the Excel function DATE

Days360 
Calculates the number of days between two dates based on a 360day year
(twelve 30day months), which is used in some accounting calculations.

Dec2Bin 
Implementation for Excel Bin2Dec() function.
Syntax: Converts a decimal number to binary. 
Dec2Hex 
Implementation for Excel DELTA() function.
Syntax: Converts a decimal number to hexadecimal. 
Delta 
Implementation for Excel DELTA() function.
Syntax: Tests whether two values are equal. 
EDate 
Implementation for Excel EDATE () function.

Errortype 
Implementation for the ERROR.TYPE() Excel function.

Even  
FactDouble 
Implementation for Excel FACTDOUBLE() function.
Syntax: Returns the double factorial of a number. 
Finance 
Implementation of the financial functions pmt, fv, ppmt, ipmt.

FinanceFunction  
FinanceLib  
Fixed0ArgFunction 
Convenience base class for functions that only take zero arguments.

Fixed1ArgFunction 
Convenience base class for functions that must take exactly one argument.

Fixed2ArgFunction 
Convenience base class for functions that must take exactly two arguments.

Fixed3ArgFunction 
Convenience base class for functions that must take exactly three arguments.

Fixed4ArgFunction 
Convenience base class for functions that must take exactly four arguments.

Hex2Dec 
Implementation for Excel HEX2DEC() function.
Syntax: Converts a hexadecimal number to decimal. 
Hlookup 
Implementation of the HLOOKUP() function.
HLOOKUP finds a column in a lookup table by the first row value and returns the value from another row.
lookup_value The value to be found in the first column of the table array. 
Hyperlink 
Implementation of Excel HYPERLINK function.
In Excel this function has special behaviour  it causes the displayed cell value to behave like a hyperlink in the GUI. 
IfFunc 
Implementation for the Excel function IF

Imaginary 
Implementation for Excel IMAGINARY() function.
Syntax: Returns the imaginary coefficient of a complex number in x + yi or x + yj text format. 
ImReal 
Implementation for Excel ImReal() function.
Syntax: Returns the real coefficient of a complex number in x + yi or x + yj text format. 
Index 
Implementation for the Excel function INDEX

Indirect 
Implementation for Excel function INDIRECT
INDIRECT() returns the cell or area reference denoted by the text argument.
Syntax:
ref_text a string representation of the desired reference as it would
normally be written in a cell formula. 
Intercept 
Implementation of Excel function INTERCEPT()
Calculates the INTERCEPT of the linear regression line that is used to predict y values from x values 
IPMT  
Irr 
Calculates the internal rate of return.

LinearRegressionFunction 
Base class for linear regression functions.

LogicalFunction  
Lookup 
Implementation of Excel function LOOKUP.
LOOKUP finds an index row in a lookup table by the first column value and returns the value from another column. 
Match 
Implementation for the MATCH() Excel function.
Syntax: Returns a 1based index specifying at what position in the lookup_array the specified lookup_value is found. Specific matching behaviour can be modified with the optional match_type parameter. 
MinaMaxa  
Mirr 
Calculates Modified internal rate of return.

Mode  
MultiOperandNumericFunction 
This is the super class for all excel function evaluator
classes that take variable number of operands, and
where the order of operands does not matter

Na 
Implementation of Excel function NA()

NotImplementedFunction 
This is the default implementation of a Function class.

Now 
Implementation of Excel NOW() Function

Npv 
Calculates the net present value of an investment by using a discount rate
and a series of future payments (negative values) and income (positive
values).

NumericFunction  
NumericFunction.OneArg  
NumericFunction.TwoArg  
Oct2Dec 
Implementation for Excel Oct2Dec() function.

Odd  
Offset 
Implementation for Excel function OFFSET()
OFFSET returns an area reference that is a specified number of rows and columns from a reference cell or area.
Syntax:
reference is the base reference. 
PPMT 
Compute the interest portion of a payment.

Quotient 
Implementation for Excel QUOTIENT () function.

Rank 
Returns the rank of a number in a list of numbers.

Rate 
Implements the Excel Rate function

Replace 
An implementation of the Excel REPLACE() function:
Replaces part of a text string based on the number of characters
you specify, with another text string.
oldText The text string containing characters to replace 
Rept 
Implementation for Excel REPT () function.
Syntax: Repeats text a given number of times. 
Roman 
Implementation for Excel WeekNum() function.
Syntax: Returns a number that indicates where the week falls numerically within a year. 
RowFunc 
Implementation for the Excel function ROW

Rows 
Implementation for Excel ROWS function.

Slope 
Implementation of Excel function SLOPE()
Calculates the SLOPE of the linear regression line that is used to predict y values from x values 
Substitute 
An implementation of the SUBSTITUTE function:
Substitutes text in a text string with new text, some number of times. 
Subtotal 
Implementation for the Excel function SUBTOTAL

Sumif 
Implementation for the Excel function SUMIF

Sumifs 
Implementation for the Excel function SUMIFS

Sumproduct 
Implementation for the Excel function SUMPRODUCT

Sumx2my2 
Implementation of Excel function SUMX2MY2()
Calculates the sum of differences of squares in two arrays of the same size. result = Σ_{i: 0..n}(x_{i}^{2}y_{i}^{2}) 
Sumx2py2 
Implementation of Excel function SUMX2PY2()
Calculates the sum of squares in two arrays of the same size. result = Σ_{i: 0..n}(x_{i}^{2}+y_{i}^{2}) 
Sumxmy2 
Implementation of Excel function SUMXMY2()
Calculates the sum of squares of differences between two arrays of the same size. result = Σ_{i: 0..n}(x_{i}y_{i})^{2} 
T 
Implementation of Excel T() function
If the argument is a text or error value it is returned unmodified. 
TextFunction  
TimeFunc 
Implementation for the Excel function TIME

Today 
Implementation of Excel TODAY() Function

Value 
Implementation for Excel VALUE() function.
Syntax: 
Vlookup 
Implementation of the VLOOKUP() function.
VLOOKUP finds a row in a lookup table by the first column value and returns the value from another column.
lookup_value The value to be found in the first column of the table array. 
WeekdayFunc 
Implementation for the Excel function WEEKDAY

WeekNum 
Implementation for Excel WeekNum() function.
Syntax: Returns a number that indicates where the week falls numerically within a year. 
XYNumericFunction 
Enum  Description 

LinearRegressionFunction.FUNCTION 
Copyright 2014 The Apache Software Foundation or its licensors, as applicable.