Class GeneralFilterFunction.GeneralFilterFunctionCall

  extended by net.sf.saxon.lib.ExtensionFunctionCall
      extended by com.saxonica.functions.extfn.GeneralFilterFunction.GeneralFilterFunctionCall
All Implemented Interfaces:
Direct Known Subclasses:
Enclosing class:

public abstract static class GeneralFilterFunction.GeneralFilterFunctionCall
extends ExtensionFunctionCall

See Also:
Serialized Form

Field Summary
protected  FunctionItem atomizer
protected  String defaultCollation
Constructor Summary
Method Summary
 void copyLocalData(ExtensionFunctionCall destination)
          Copy local data from one copy of the function to another.
 void supplyStaticContext(StaticContext context, int locationId, Expression[] arguments)
          Supply static context information.
Methods inherited from class net.sf.saxon.lib.ExtensionFunctionCall
call, effectiveBooleanValue, getContainer, getDefinition, getExecutable, rewrite, setDefinition
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail


protected String defaultCollation


protected FunctionItem atomizer
Constructor Detail


public GeneralFilterFunction.GeneralFilterFunctionCall()
Method Detail


public void supplyStaticContext(StaticContext context,
                                int locationId,
                                Expression[] arguments)
                         throws XPathException
Supply static context information.

This method is called during compilation to provide information about the static context in which the function call appears. If the implementation of the function needs information from the static context, then it should save it now, as it will not be available later at run-time.

The implementation also has the opportunity to examine the expressions that appear in the arguments to the function call at this stage. These might already have been modified from the original expressions as written by the user. The implementation should not modify any of these expressions.

The default implementation of this method does nothing.

supplyStaticContext in class ExtensionFunctionCall
context - The static context in which the function call appears. The method must not modify the static context.
locationId - An integer code representing the location of the call to the extension function in the stylesheet; can be used in conjunction with the locationMap held in the static context for diagnostics
arguments - The XPath expressions supplied in the call to this function. The method must not modify this array, or any of the expressions contained in the array.
XPathException - if the implementation is able to detect a static error in the way the function is being called (for example it might require that the types of the arguments are consistent with each other).


public void copyLocalData(ExtensionFunctionCall destination)
Copy local data from one copy of the function to another. This method must be implemented in any implementation that maintains local data retained from the static context; the job of the method is to copy this local data to the supplied destination function.

copyLocalData in class ExtensionFunctionCall
destination - the function to which the local data must be copied. This will always be an instance of the same function class as the source function.

Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.