FormatNumber2 (saxon8 JavaDoc)

Class FormatNumber2

public class FormatNumber2 extends SystemFunction implements XSLTFunction

XSLT 2.0 implementation of format-number() function - removes the dependence on the JDK.

Method Summary
static BigDecimal	adjustToDecimal(double value, int precision) Convert a double to a BigDecimal.
void	checkArguments(StaticContext env)
String	evaluateAsString(XPathContext context) Evaluate in a context where a string is wanted
Item	evaluateItem(XPathContext c) Evaluate in a general context
void	fixup(DecimalSymbols dfs) Fixup: this is a callback from the DecimalFormatManager used once the xsl:decimal-format element is identified
Expression	preEvaluate(StaticContext env) preEvaluate: this method suppresses compile-time evaluation by doing nothing.

Method Summary

static BigDecimal

adjustToDecimal(double value, int precision)

Convert a double to a BigDecimal.

void

checkArguments(StaticContext env)

String

evaluateAsString(XPathContext context)

Evaluate in a context where a string is wanted

Item

evaluateItem(XPathContext c)

Evaluate in a general context

void

fixup(DecimalSymbols dfs)

Fixup: this is a callback from the DecimalFormatManager used once the xsl:decimal-format element is identified

Expression

preEvaluate(StaticContext env)

preEvaluate: this method suppresses compile-time evaluation by doing nothing.

Method Detail

public static BigDecimal adjustToDecimal(double value, int precision)

Convert a double to a BigDecimal. In general there will be several BigDecimal values that are equal to the supplied value, and the one we want to choose is the one with fewest non-zero digits. The algorithm used is rather pragmatic: look for a string of zeroes or nines, try rounding the number down or up as approriate, then convert the adjusted value to a double to see if it's equal to the original: if not, use the original value unchanged.

Parameters: value the double to be converted precision 2 for a double, 1 for a float

Returns: the result of conversion to a double

public void checkArguments(StaticContext env)

public String evaluateAsString(XPathContext context)

Evaluate in a context where a string is wanted

Evaluate in a general context

public void fixup(DecimalSymbols dfs)

Fixup: this is a callback from the DecimalFormatManager used once the xsl:decimal-format element is identified

preEvaluate: this method suppresses compile-time evaluation by doing nothing. We can't evaluate early because we don't have access to the DecimalFormatManager.