org.apache.xalan.extensions
Class ExtensionHandlerJava

java.lang.Object
  org.apache.xalan.extensions.ExtensionHandler
      org.apache.xalan.extensions.ExtensionHandlerJava

Direct Known Subclasses:

ExtensionHandlerJavaClass, ExtensionHandlerJavaPackage

public abstract class ExtensionHandlerJava
extends ExtensionHandler

Abstract base class handling the java language extensions for XPath. This base class provides cache management shared by all of the various java extension handlers.

Field Summary

private java.util.Hashtable	m_cachedMethods Table of cached methods
protected java.lang.String	m_className Extension class name

Fields inherited from class org.apache.xalan.extensions.ExtensionHandler

m_namespaceUri, m_scriptLang

Constructor Summary

protected

ExtensionHandlerJava(java.lang.String namespaceUri, java.lang.String scriptLang, java.lang.String className) Construct a new extension handler given all the information needed.

Method Summary

java.lang.Object	getFromCache(java.lang.Object methodKey, java.lang.Object objType, java.lang.Object[] methodArgs) Look up the entry in the method cache.
java.lang.Object	putToCache(java.lang.Object methodKey, java.lang.Object objType, java.lang.Object[] methodArgs, java.lang.Object methodObj) Add a new entry into the method cache.

Methods inherited from class org.apache.xalan.extensions.ExtensionHandler

callFunction, callFunction, getClassForName, isElementAvailable, isFunctionAvailable, processElement

Methods inherited from class java.lang.Object

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

Field Detail

m_className

protected java.lang.String m_className

Extension class name

m_cachedMethods

private java.util.Hashtable m_cachedMethods

Table of cached methods

Constructor Detail

ExtensionHandlerJava

protected ExtensionHandlerJava(java.lang.String namespaceUri,
                               java.lang.String scriptLang,
                               java.lang.String className)

Construct a new extension handler given all the information needed.

Parameters:

namespaceUri - the extension namespace URI that I'm implementing

funcNames - string containing list of functions of extension NS

lang - language of code implementing the extension

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)

scriptLang - the scripting language

className - the extension class name

Method Detail

getFromCache

public java.lang.Object getFromCache(java.lang.Object methodKey,
                                     java.lang.Object objType,
                                     java.lang.Object[] methodArgs)

Look up the entry in the method cache.

Parameters:

methodKey - A key that uniquely identifies this invocation in the stylesheet.

objType - A Class object or instance object representing the type

methodArgs - An array of the XObject arguments to be used for function mangling.

Returns:

The given method from the method cache

putToCache

public java.lang.Object putToCache(java.lang.Object methodKey,
                                   java.lang.Object objType,
                                   java.lang.Object[] methodArgs,
                                   java.lang.Object methodObj)

Add a new entry into the method cache.

Parameters:

methodKey - A key that uniquely identifies this invocation in the stylesheet.

objType - A Class object or instance object representing the type

methodArgs - An array of the XObject arguments to be used for function mangling.

methodObj - A Class object or instance object representing the method

Returns:

The cached method object