jd.xml.xslt.extension
Class JavaExtensionHandler

java.lang.Object
  jd.xml.xslt.extension.ExtensionHandler
      jd.xml.xslt.extension.JavaExtensionHandler

Direct Known Subclasses:

JdExtensionHandler

public class JavaExtensionHandler

extends ExtensionHandler

An ExtensionHandler that maps extension functions to java methods. It is defined by a script-element. For instance

      
      
 
 allows expressions to use the methods of java.lang.Math:
 
      
 















Constructor Summary
JavaExtensionHandler(String namespaceUri,
                     Class javaClass)



          Create a JavaExtensionHandler
 



Method Summary




 Function
getFunction(XsltContext context,
            String methodName,
            Expression[] arguments)



          Return an extension function for the given name.



 boolean
isElementAvailable(String name)



          Return if an extension element is available.



 boolean
isFunctionAvailable(String name)



          Return if the associated java class has a method with the given name
 If true this does not guarantee that the method can be called successfully.


 
Methods inherited from class jd.xml.xslt.extension.ExtensionHandler
camelCaseName, implementsUri
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 








Constructor Detail



JavaExtensionHandler
public JavaExtensionHandler(String namespaceUri,
                            Class javaClass)

Create a JavaExtensionHandler

Parameters:
namespaceUri - the namespace uri of this ExtensionHandler
javaClass - the extension functions handled by this ExtensionHandlers
      are methods of this class




Method Detail



isElementAvailable
public boolean isElementAvailable(String name)

Return if an extension element is available.


Specified by:
isElementAvailable in class ExtensionHandler








isFunctionAvailable
public boolean isFunctionAvailable(String name)

Return if the associated java class has a method with the given name
 If true this does not guarantee that the method can be called successfully.


Specified by:
isFunctionAvailable in class ExtensionHandler


Parameters:
name - the method name. If it equals "new" it is tested whether the
      class has a constructor.





getFunction
public Function getFunction(XsltContext context,
                            String methodName,
                            Expression[] arguments)

Return an extension function for the given name.


Specified by:
getFunction in class ExtensionHandler


Parameters:
context - the current evaluation context
methodName - a method name
arguments - the arguments passed to the method