net.sf.saxon.option.exslt

Class Math

java.lang.Object

net.sf.saxon.option.exslt.Math

public abstract class Math
extends java.lang.Object

This class implements extension functions in the http://exslt.org/math namespace.

Constructor Summary

Constructors

Constructor and Description
Math()

Method Summary

Modifier and Type	Method and Description
static double	abs(double x) Get the absolute value of a numeric value (SStL)
static double	acos(double x) Get the arccosine of a numeric value (SStL)
static double	asin(double x) Get the arcsine of a numeric value (SStL)
static double	atan(double x) Get the arctangent of a numeric value (SStL)
static double	atan2(double x, double y) Converts rectangular coordinates to polar (SStL)
static double	constant(XPathContext context, java.lang.String name, double precision) Get a named constant to a given precision (SStL)
static double	cos(double x) Get the cosine of a numeric value (SStL)
static double	exp(double x) Get the exponential of a numeric value (SStL)
static Sequence	highest(XPathContext context, SequenceIterator nsv) Get the items with maximum numeric value of the string-value of each of a sequence of items.
static double	log(double x) Get the logarithm of a numeric value (SStL)
static Sequence	lowest(XPathContext context, SequenceIterator nsv) Get the items with minimum numeric value of the string-value of each of a sequence of items The items are returned in the order of the original sequence.
static double	max(XPathContext context, SequenceIterator nsv) Get the maximum numeric value of the string-value of each of a set of nodes
static double	min(XPathContext context, SequenceIterator nsv) Get the minimum numeric value of the string-value of each of a set of nodes
static NumericValue	power(NumericValue n, NumericValue e) Get a number n raised to the power of another number e.
static double	random() Get a random numeric value (SStL)
static double	sin(double x) Get the sine of a numeric value (SStL)
static double	sqrt(double x) Get the square root of a numeric value (SStL)
static double	tan(double x) Get the tangent of a numeric value (SStL)

Methods inherited from class java.lang.Object

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

Constructor Detail

Math

public Math()

Method Detail

max

public static double max(XPathContext context,
                         SequenceIterator nsv)
                  throws XPathException

Get the maximum numeric value of the string-value of each of a set of nodes

Parameters:

context - the XPath dynamic context

nsv - the values whose maximum is required

Throws:

XPathException

min

public static double min(XPathContext context,
                         SequenceIterator nsv)
                  throws XPathException

Get the minimum numeric value of the string-value of each of a set of nodes

Parameters:

context - the XPath dynamic context

nsv - the values whose minimum is required

Throws:

XPathException

highest

public static Sequence highest(XPathContext context,
                               SequenceIterator nsv)
                        throws XPathException

Get the items with maximum numeric value of the string-value of each of a sequence of items. The items are returned in the order of the original sequence.

Parameters:

context - the XPath dynamic context

nsv - the input sequence

Throws:

XPathException

lowest

public static Sequence lowest(XPathContext context,
                              SequenceIterator nsv)
                       throws XPathException

Get the items with minimum numeric value of the string-value of each of a sequence of items The items are returned in the order of the original sequence.

Parameters:

context - the XPath dynamic context

nsv - the input sequence

Throws:

XPathException

abs

public static double abs(double x)

Get the absolute value of a numeric value (SStL)

Parameters:

x - the input value

Returns:

the result

sqrt

public static double sqrt(double x)

Get the square root of a numeric value (SStL)

Parameters:

x - the input value

Returns:

the result

power

public static NumericValue power(NumericValue n,
                                 NumericValue e)
                          throws XPathException

Get a number n raised to the power of another number e.

If e is a non-negative integer, then the result will have the same type as n, except that a float is always promoted to double.

If e is a negative integer, then the result will have the same type as n except that a float is treated as a double and an integer is treated as a decimal.

If e is not an integer (or an xs:decimal representing an integer), the result will be a double.

Parameters:

n - the first argument.

e - the second argument. M

Returns:

the result of n^e

Throws:

XPathException - if an arithmetic overflow is detected. However, there is no guarantee that overflow will always be detected, it may (especially with double arithmetic) lead to wrong answers being returned.

constant

public static double constant(XPathContext context,
                              java.lang.String name,
                              double precision)
                       throws XPathException

Get a named constant to a given precision (SStL)

Parameters:

context - the XPath dynamic context

name - the name of the constant

precision - the required precision

Throws:

XPathException

log

public static double log(double x)

Get the logarithm of a numeric value (SStL)

Parameters:

x - the input value

Returns:

the result

random

public static double random()

Get a random numeric value (SStL)

Returns:

the result

sin

public static double sin(double x)

Get the sine of a numeric value (SStL)

Parameters:

x - the input value

Returns:

the result

cos

public static double cos(double x)

Get the cosine of a numeric value (SStL)

Parameters:

x - the input value

Returns:

the result

tan

public static double tan(double x)

Get the tangent of a numeric value (SStL)

Parameters:

x - the input value

Returns:

the result

asin

public static double asin(double x)

Get the arcsine of a numeric value (SStL)

Parameters:

x - the input value

Returns:

the result

acos

public static double acos(double x)

Get the arccosine of a numeric value (SStL)

Parameters:

x - the input value

Returns:

the result

atan

public static double atan(double x)

Get the arctangent of a numeric value (SStL)

Parameters:

x - the input value

Returns:

the result

atan2

public static double atan2(double x,
                           double y)

Converts rectangular coordinates to polar (SStL)

Parameters:

x - the first input value

y - the second input value

Returns:

the result

exp

public static double exp(double x)

Get the exponential of a numeric value (SStL)

Parameters:

x - the input value

Returns:

the result