com.saxonica.bytecode.util
Class Callback

java.lang.Object
  com.saxonica.bytecode.util.Callback

public class Callback
extends Object

A convenient place to put static methods that will be called from generated byte code

Constructor Summary

Callback()

Method Summary

static int	booleanFromString(CharSequence s) Convert a string to a boolean value, using the XML Schema rules (including whitespace trimming)
static XPathException	makeMultipleItemsException(CardinalityChecker expression, XPathContext context) Construct an exception reporting that a sequence of more than item was found where a single item was expected
static XPathException	makeNonComparableException(AtomicValue av0, AtomicValue av1, SourceLocator location) Construct (but don't throw) an exception reporting that two atomic values are not comparable
static XPathException	makeXmlNamespaceException(String prefix, String namespace, Instruction instr) Construct (but do not throw) an exception reporting that the namespace prefix "xml" and the XML namespace URI can only be used as a pair
static double	stringToNumberOrNaN(StringToDouble s2d, CharSequence string) Convert a string to a double number, returning NaN if the string is not numeric

Methods inherited from class java.lang.Object

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

Constructor Detail

Callback

public Callback()

Method Detail

makeNonComparableException

public static XPathException makeNonComparableException(AtomicValue av0,
                                                        AtomicValue av1,
                                                        SourceLocator location)

Construct (but don't throw) an exception reporting that two atomic values are not comparable

Parameters:

av0 - the first atomic value

av1 - the second atomic value

location - the source location of the comparison

Returns:

the exception reporting the error

makeXmlNamespaceException

public static XPathException makeXmlNamespaceException(String prefix,
                                                       String namespace,
                                                       Instruction instr)

Construct (but do not throw) an exception reporting that the namespace prefix "xml" and the XML namespace URI can only be used as a pair

Parameters:

prefix - the prefix that was actually used

namespace - the namespace URI that was actually used

instr - the instruction in which the error occurred

Returns:

the exception reporting the error condition

makeMultipleItemsException

public static XPathException makeMultipleItemsException(CardinalityChecker expression,
                                                        XPathContext context)

Construct an exception reporting that a sequence of more than item was found where a single item was expected

Parameters:

expression - the cardinality checker that detects the error. This is re-evaluated to include the first few items of the sequence in the error message

context - the dynamic context

Returns:

the exception object that reports the error

stringToNumberOrNaN

public static double stringToNumberOrNaN(StringToDouble s2d,
                                         CharSequence string)

Convert a string to a double number, returning NaN if the string is not numeric

Parameters:

s2d - the string to double converter to be used

string - the string to be converted

Returns:

the returned number

booleanFromString

public static int booleanFromString(CharSequence s)

Convert a string to a boolean value, using the XML Schema rules (including whitespace trimming)

Parameters:

s - the input string

Returns:

the relevant BooleanValue if validation succeeds; or a ValidationFailure if not.