net.sf.saxon.expr

Class PJConverter.ToZeroOrOne

java.lang.Object

net.sf.saxon.expr.PJConverter

net.sf.saxon.expr.PJConverter.ToZeroOrOne

Enclosing class:

PJConverter

public static class PJConverter.ToZeroOrOne
extends PJConverter

Converter for use when the target class is ZeroOrOne, which constrains the value to be a singleton or an empty sequence

Nested Class Summary

Nested classes/interfaces inherited from class net.sf.saxon.expr.PJConverter

PJConverter.AnyURIValueToURI, PJConverter.AnyURIValueToURL, PJConverter.Atomic, PJConverter.BooleanValueToBoolean, PJConverter.CalendarValueToCalendar, PJConverter.CalendarValueToDate, PJConverter.General, PJConverter.Identity, PJConverter.IntegerValueToBigInteger, PJConverter.IntegerValueToByte, PJConverter.IntegerValueToChar, PJConverter.IntegerValueToInt, PJConverter.IntegerValueToLong, PJConverter.IntegerValueToShort, PJConverter.NumericValueToBigDecimal, PJConverter.NumericValueToDouble, PJConverter.NumericValueToFloat, PJConverter.QualifiedNameValueToQName, PJConverter.StringValueToChar, PJConverter.StringValueToString, PJConverter.ToArray, PJConverter.ToCollection, PJConverter.ToNull, PJConverter.ToOne, PJConverter.ToOneOrMore, PJConverter.ToSequenceExtent, PJConverter.ToSequenceIterator, PJConverter.ToZeroOrMore, PJConverter.ToZeroOrOne, PJConverter.UnwrapExternalObject

Field Summary

Fields

Modifier and Type	Field and Description
static PJConverter.ToZeroOrOne	INSTANCE

Constructor Summary

Constructors

Constructor and Description
ToZeroOrOne()

Method Summary

Modifier and Type	Method and Description
ZeroOrOne<Item>	convert(Sequence value, java.lang.Class targetClass, XPathContext context) Convert an XPath value to a Java value of a specified class

Methods inherited from class net.sf.saxon.expr.PJConverter

allocate, allocateNodeListCreator, getEquivalentSequenceType, getParameterizedSequenceType

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final PJConverter.ToZeroOrOne INSTANCE

Constructor Detail

ToZeroOrOne

public ToZeroOrOne()

Method Detail

convert

public ZeroOrOne<Item> convert(Sequence value,
                               java.lang.Class targetClass,
                               XPathContext context)
                        throws XPathException

Description copied from class: PJConverter

Convert an XPath value to a Java value of a specified class

Specified by:

convert in class PJConverter

Parameters:

value - the supplied XPath value

targetClass - the class of the required Java value

context - the XPath dynamic context

Returns:

the corresponding Java value, which is guaranteed to be an instance of the target class (except that an empty sequence is converted to null)

Throws:

XPathException - if the conversion is not possible or fails