WebLogic Server 6.0sp2 API Reference

weblogic.apache.xalan.xpath
Interface ExtensionFunctionHandler.ExtensionLiaison

All Known Implementing Classes:

XSLTJavaClassEngine

public static interface ExtensionFunctionHandler.ExtensionLiaison

Interface for connecting extension functions to xalan. Based on ExtensionFunctionHandler

Author:

Sanjiva Weerawarana (sanjiva@watson.ibm.com), Costin@eng.sun.com
Copyright © 2001 BEA Systems, Inc. All Rights Reserved.

Method Summary

java.lang.Object	callFunction(java.lang.String funcName, java.util.Vector args, java.lang.Object methodKey, java.lang.Class javaClass) Process a call to a function.
java.lang.Object	callJava(java.lang.Object object, java.lang.String method, java.lang.Object[] args, java.lang.Object methodKey) call the named method on the object that was loaded by eval.
void	checkInit() Make sure the component is initialized
void	setScript(java.lang.String lang, java.lang.String srcURL, java.lang.String scriptSrc) Set the script data for this extension NS.
void	startupComponent(java.lang.Class classObj) Start the component up by executing any script that needs to run at startup time.

Method Detail

checkInit

public void checkInit()
               throws XPathProcessorException

Make sure the component is initialized

startupComponent

public void startupComponent(java.lang.Class classObj)
                      throws XPathProcessorException

Start the component up by executing any script that needs to run at startup time. This needs to happen before any functions can be called on the component.

Throws:

XPathProcessorException - if something bad happens.

callFunction

public java.lang.Object callFunction(java.lang.String funcName,
                                     java.util.Vector args,
                                     java.lang.Object methodKey,
                                     java.lang.Class javaClass)
                              throws XPathException

Process a call to a function.

Parameters:

funcName - Function name.

args - The arguments of the function call.

Returns:

the return value of the function evaluation.

Throws:

XSLProcessorException - thrown if something goes wrong while running the extension handler.

java.net.MalformedURLException - if loading trouble

java.io.FileNotFoundException - if loading trouble

java.io.IOException - if loading trouble

org.xml.sax.SAXException - if parsing trouble

callJava

public java.lang.Object callJava(java.lang.Object object,
                                 java.lang.String method,
                                 java.lang.Object[] args,
                                 java.lang.Object methodKey)
                          throws XPathException

call the named method on the object that was loaded by eval. The method selection stuff is very XSLT-specific, hence the custom engine.

Parameters:

object - ignored - should always be null

setScript

public void setScript(java.lang.String lang,
                      java.lang.String srcURL,
                      java.lang.String scriptSrc)

Set the script data for this extension NS. If srcURL is !null then the script body is read from that URL. If not the scriptSrc is used as the src. This method does not actually execute anything - that's done when the component is first hit by the user by an element or a function call.

Parameters:

lang - language of the script.

srcURL - value of src attribute (if any) - treated as a URL or a classname depending on the value of lang. If srcURL is not null, then scriptSrc is ignored.

scriptSrc - the actual script code (if any)