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)systemId -
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) 2005 Apache XML Project. All Rights Reserved.