org.apache.poi.ss.formula.functions

Class Dec2Hex

java.lang.Object

org.apache.poi.ss.formula.functions.Dec2Hex

All Implemented Interfaces:

FreeRefFunction, Function, Function1Arg, Function2Arg

public final class Dec2Hex
extends java.lang.Object
implements FreeRefFunction

Implementation for Excel DELTA() function.

Syntax:
DEC2HEX (number,places )

Converts a decimal number to hexadecimal. The decimal integer you want to convert. If number is negative, places is ignored and this function returns a 10-character (40-bit) hexadecimal number in which the most significant bit is the sign bit. The remaining 39 bits are magnitude bits. Negative numbers are represented using two's-complement notation.

• If number < -549,755,813,888 or if number > 549,755,813,887, this function returns the #NUM! error value.
• If number is nonnumeric, this function returns the #VALUE! error value.

places

The number of characters to use. The places argument is useful for padding the return value with leading 0s (zeros).

• If this argument is omitted, this function uses the minimum number of characters necessary.
• If this function requires more than places characters, it returns the #NUM! error value.
• If this argument is non numeric, this function returns the #VALUE! error value.
• If this argument is negative, this function returns the #NUM! error value.
• If this argument contains a decimal value, this function ignores the numbers to the right side of the decimal point.

Field Summary

Fields

Modifier and Type	Field and Description
static FreeRefFunction	instance

Constructor Summary

Constructors

Constructor and Description
Dec2Hex()

Method Summary

Modifier and Type	Method and Description
ValueEval	evaluate(int srcRowIndex, int srcColumnIndex, ValueEval arg0) see Function.evaluate(ValueEval[], int, int)
ValueEval	evaluate(int srcRowIndex, int srcColumnIndex, ValueEval number, ValueEval places) see Function.evaluate(ValueEval[], int, int)
ValueEval	evaluate(ValueEval[] args, int srcRowIndex, int srcColumnIndex)
ValueEval	evaluate(ValueEval[] args, OperationEvaluationContext ec)

Methods inherited from class java.lang.Object

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

Field Detail

instance

public static final FreeRefFunction instance

Constructor Detail

Dec2Hex

public Dec2Hex()

Method Detail

evaluate

public ValueEval evaluate(int srcRowIndex,
                          int srcColumnIndex,
                          ValueEval number,
                          ValueEval places)

Description copied from interface: Function2Arg

see Function.evaluate(ValueEval[], int, int)

Specified by:

evaluate in interface Function2Arg

evaluate

public ValueEval evaluate(int srcRowIndex,
                          int srcColumnIndex,
                          ValueEval arg0)

Description copied from interface: Function1Arg

see Function.evaluate(ValueEval[], int, int)

Specified by:

evaluate in interface Function1Arg

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).

evaluate

public final 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.