Package org.apache.xalan.extensions

Class ExtensionHandlerExsltFunction

  • public class ExtensionHandlerExsltFunction
extends ExtensionHandler
    Execute EXSLT functions, determine the availability of EXSLT functions, and the availability of an EXSLT result element.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.lang.Object callFunction​(java.lang.String funcName, java.util.Vector args, java.lang.Object methodKey, ExpressionContext exprContext)
      Execute the EXSLT function and return the result value.
      java.lang.Object callFunction​(FuncExtFunction extFunction, java.util.Vector args, ExpressionContext exprContext)
      Execute the EXSLT function and return the result value.
      ElemExsltFunction getFunction​(java.lang.String funcName)
      Get the ElemExsltFunction element associated with the function.
      boolean isElementAvailable​(java.lang.String elemName)
      If an element-available() call applies to an EXSLT result element within an EXSLT function element, return true.
      boolean isFunctionAvailable​(java.lang.String funcName)
      Does the EXSLT function exist?
      void processElement​(java.lang.String localPart, ElemTemplateElement element, TransformerImpl transformer, Stylesheet stylesheetTree, java.lang.Object methodKey)
      Required by ExtensionHandler (an abstract method).

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • ExtensionHandlerExsltFunction

        public ExtensionHandlerExsltFunction​(java.lang.String ns,
                                     StylesheetRoot stylesheet)
        Constructor called from ElemExsltFunction runtimeInit().

    • Method Detail

      • processElement

        public void processElement​(java.lang.String localPart,
                           ElemTemplateElement element,
                           TransformerImpl transformer,
                           Stylesheet stylesheetTree,
                           java.lang.Object methodKey)
                    throws javax.xml.transform.TransformerException,
                           java.io.IOException
        Required by ExtensionHandler (an abstract method). No-op.
        Specified by:
        processElement in class ExtensionHandler
        Parameters:
        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.
        Throws:
        javax.xml.transform.TransformerException - if parsing trouble
        java.io.IOException - if loading trouble

      • getFunction

        public ElemExsltFunction getFunction​(java.lang.String funcName)
        Get the ElemExsltFunction element associated with the function.
        Parameters:
        funcName - Local name of the function.
        Returns:
        the ElemExsltFunction element associated with the function, null if none exists.

      • isFunctionAvailable

        public boolean isFunctionAvailable​(java.lang.String funcName)
        Does the EXSLT function exist?
        Specified by:
        isFunctionAvailable in class ExtensionHandler
        Parameters:
        funcName - Local name of the function.
        Returns:
        true if the function exists.

      • isElementAvailable

        public boolean isElementAvailable​(java.lang.String elemName)
        If an element-available() call applies to an EXSLT result element within an EXSLT function element, return true. Note: The EXSLT function element is a template-level element, and element-available() returns false for it.
        Specified by:
        isElementAvailable in class ExtensionHandler
        Parameters:
        elemName - name of the element.
        Returns:
        true if the function is available.

      • callFunction

        public java.lang.Object callFunction​(java.lang.String funcName,
                                     java.util.Vector args,
                                     java.lang.Object methodKey,
                                     ExpressionContext exprContext)
                              throws javax.xml.transform.TransformerException
        Execute the EXSLT function and return the result value.
        Specified by:
        callFunction in class ExtensionHandler
        Parameters:
        funcName - Name of the EXSLT function.
        args - The arguments of the function call.
        methodKey - Not used.
        exprContext - Used to get the XPathContext.
        Returns:
        the return value of the function evaluation.
        Throws:
        javax.xml.transform.TransformerException

      • callFunction

        public java.lang.Object callFunction​(FuncExtFunction extFunction,
                                     java.util.Vector args,
                                     ExpressionContext exprContext)
                              throws javax.xml.transform.TransformerException
        Execute the EXSLT function and return the result value.
        Specified by:
        callFunction in class ExtensionHandler
        Parameters:
        extFunction - The XPath extension function
        args - The arguments of the function call.
        exprContext - The context in which this expression is being executed.
        Returns:
        the return value of the function evaluation.
        Throws:
        javax.xml.transform.TransformerException