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java.lang.Objectorg.apache.xalan.extensions.ExtensionHandler
Abstract base class for handling an extension namespace for XPath. Provides functions to test a function's existence and call a function. Also provides functions for calling an element and testing for an element's existence.
Method Summary | |
abstract Object |
callFunction(FuncExtFunction extFunction,
Vector args,
ExpressionContext exprContext)
Process a call to a function. |
abstract Object |
callFunction(String funcName,
Vector args,
Object methodKey,
ExpressionContext exprContext)
Process a call to a function. |
abstract boolean |
isElementAvailable(String element)
Tests whether a certain element name is known within this namespace. |
abstract boolean |
isFunctionAvailable(String function)
Tests whether a certain function name is known within this namespace. |
abstract void |
processElement(String localPart,
ElemTemplateElement element,
TransformerImpl transformer,
Stylesheet stylesheetTree,
Object methodKey)
Process a call to this extension namespace via an element. |
Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
public abstract boolean isFunctionAvailable(String function)
function
- name of the function being tested
public abstract boolean isElementAvailable(String element)
element
- Name of element to check
public abstract Object callFunction(String funcName, Vector args, Object methodKey, ExpressionContext exprContext) throws TransformerException
funcName
- Function name.args
- The arguments of the function call.methodKey
- A key that uniquely identifies this class and method call.exprContext
- The context in which this expression is being executed.
TransformerException
- if parsing troublepublic abstract Object callFunction(FuncExtFunction extFunction, Vector args, ExpressionContext exprContext) throws TransformerException
extFunction
- The XPath extension function.args
- The arguments of the function call.exprContext
- The context in which this expression is being executed.
TransformerException
- if parsing troublepublic abstract void processElement(String localPart, ElemTemplateElement element, TransformerImpl transformer, Stylesheet stylesheetTree, Object methodKey) throws TransformerException, IOException
localPart
- Element name's local part.element
- The extension element being processed.transformer
- Handle to TransformerImpl.stylesheetTree
- The compiled stylesheet tree.methodKey
- A key that uniquely identifies this class and method call.
XSLProcessorException
- thrown if something goes wrong
while running the extension handler.
MalformedURLException
- if loading trouble
FileNotFoundException
- if loading trouble
IOException
- if loading trouble
TransformerException
- if parsing trouble
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