net.sf.saxon.functions

Class ExtensionFunctionFactory

java.lang.Object

net.sf.saxon.functions.ExtensionFunctionFactory

All Implemented Interfaces:

java.io.Serializable

public class ExtensionFunctionFactory
extends java.lang.Object
implements java.io.Serializable

This class acts as a factory for creating expressions that call Java extension functions. A different factory may be registered with the Configuration in order to customize the behaviour. Alternatively, this factory class can be customized by calling setExtensionFunctionClass to nominate a subclass of ExtensionFunctionCall to be used to implement calls on extension functions.

Note that this class handles Java extension functions only; a different class, DotNetExtensionFunctionFactory, is used for .NET extensions.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ExtensionFunctionFactory(Configuration config)

Method Summary

Modifier and Type	Method and Description
Expression	makeExtensionFunctionCall(int nameCode, java.lang.Class theClass, java.lang.reflect.AccessibleObject method, Expression[] arguments) Factory method to create an expression that calls a Java extension function.
void	setExtensionFunctionClass(java.lang.Class subclass) Set the class to be used to represent extension function calls.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExtensionFunctionFactory

public ExtensionFunctionFactory(Configuration config)

Method Detail

setExtensionFunctionClass

public void setExtensionFunctionClass(java.lang.Class subclass)

Set the class to be used to represent extension function calls. This must be a subclass of ExtensionFunctionCall

Parameters:

subclass - the subclass of ExtensionFunctionCall to be used

makeExtensionFunctionCall

public Expression makeExtensionFunctionCall(int nameCode,
                                            java.lang.Class theClass,
                                            java.lang.reflect.AccessibleObject method,
                                            Expression[] arguments)

Factory method to create an expression that calls a Java extension function. This is always called at XPath compile time.

Parameters:

nameCode - the name of the function name, as represented in the name pool

theClass - the Java class containing the extension function

method - The "accessibleObject" representing a constructor, method, or field corresponding to the extension function

arguments - Array containing the expressions supplied as arguments to the function call.

Returns:

the constructed ExtensionFunctionCall object (a subclass might return any expression representing the extension function call).