org.apache.xalan.extensions
Class ExtensionHandlerGeneral
public class ExtensionHandlerGeneral
Class handling an extension namespace for XPath. Provides functions
to test a function's existence and call a function
- Sanjiva Weerawarana (sanjiva@watson.ibm.com)
ExtensionHandlerGeneral(String namespaceUri, StringVector elemNames, StringVector funcNames, String scriptLang, String scriptSrcURL, String scriptSrc, String systemId) - Construct a new extension namespace handler given all the information
needed.
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ExtensionHandlerGeneral
public ExtensionHandlerGeneral(String namespaceUri,
StringVector elemNames,
StringVector funcNames,
String scriptLang,
String scriptSrcURL,
String scriptSrc,
String systemId)
throws TransformerException
Construct a new extension namespace handler given all the information
needed.
namespaceUri
- the extension namespace URI that I'm implementingelemNames
- Vector of element namesfuncNames
- string containing list of functions of extension NSscriptLang
- Scripting language of implementationscriptSrcURL
- URL of source scriptscriptSrc
- the actual script code (if any)
callFunction
public Object callFunction(String funcName,
Vector args,
Object methodKey,
ExpressionContext exprContext)
throws TransformerException
Process a call to a function.
- callFunction in interface ExtensionHandler
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.
- the return value of the function evaluation.
callFunction
public Object callFunction(FuncExtFunction extFunction,
Vector args,
ExpressionContext exprContext)
throws TransformerException
Process a call to an XPath extension function
- callFunction in interface ExtensionHandler
extFunction
- The XPath extension functionargs
- The arguments of the function call.exprContext
- The context in which this expression is being executed.
- the return value of the function evaluation.
isElementAvailable
public boolean isElementAvailable(String element)
Tests whether a certain element name is known within this namespace.
- isElementAvailable in interface ExtensionHandler
element
- name of the element being tested
- true if its known, false if not.
isFunctionAvailable
public boolean isFunctionAvailable(String function)
Tests whether a certain function name is known within this namespace.
- isFunctionAvailable in interface ExtensionHandler
function
- name of the function being tested
- true if its known, false if not.
processElement
public void processElement(String localPart,
ElemTemplateElement element,
TransformerImpl transformer,
Stylesheet stylesheetTree,
Object methodKey)
throws TransformerException,
IOException
Process a call to this extension namespace via an element. As a side
effect, the results are sent to the TransformerImpl's result tree.
- processElement in interface ExtensionHandler
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.
Copyright B) 2004 Apache XML Project. All Rights Reserved.