net.sf.saxon.expr
Class PJConverter.ToNull

java.lang.Object
  net.sf.saxon.expr.PJConverter
      net.sf.saxon.expr.PJConverter.ToNull

All Implemented Interfaces:

java.io.Serializable

Enclosing class:

PJConverter

public static class PJConverter.ToNull
extends PJConverter

See Also:

Serialized Form

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.ToSequenceExtent, PJConverter.ToSequenceIterator, PJConverter.UnwrapExternalObject

Field Summary

static PJConverter.ToNull

INSTANCE

Constructor Summary

PJConverter.ToNull()

Method Summary

java.lang.String	compile(java.lang.String var, java.lang.Class targetClass, CodeGeneratorService compiler) Generate Java code to implement the type conversion
java.lang.Object	convert(ValueRepresentation 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, getEquivalentItemType

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static PJConverter.ToNull INSTANCE

Constructor Detail

PJConverter.ToNull

public PJConverter.ToNull()

Method Detail

convert

public java.lang.Object convert(ValueRepresentation 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

compile

public java.lang.String compile(java.lang.String var,
                                java.lang.Class targetClass,
                                CodeGeneratorService compiler)

Description copied from class: PJConverter

Generate Java code to implement the type conversion

Overrides:

compile in class PJConverter

Parameters:

var - the name of a variable whose value will be the XPath ValueRepresentation to be converted

targetClass - the required class of the Java value

compiler - provides supporting services by callback @return the text of a Java expression whose result will be a Java object/value of the required type