public class FuncExtFunction extends Function
Constructor and Description |
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FuncExtFunction(String namespace,
String extensionName,
Object methodKey)
Create a new FuncExtFunction based on the qualified name of the extension,
and a unique method key.
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Modifier and Type | Method and Description |
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void |
callArgVisitors(XPathVisitor visitor)
Call the visitors for the function arguments.
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void |
checkNumberArgs(int argNum)
Check that the number of arguments passed to this function is correct.
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XObject |
execute(XPathContext xctxt)
Execute the function.
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void |
exprSetParent(ExpressionNode n)
Set the parent node.
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void |
fixupVariables(Vector vars,
int globalsSize)
This function is used to fixup variables from QNames to stack frame
indexes at stylesheet build time.
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Expression |
getArg(int n)
Return the nth argument passed to the extension function.
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int |
getArgCount()
Return the number of arguments that were passed
into this extension function.
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String |
getFunctionName()
Return the name of the extension function.
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Object |
getMethodKey()
Return the method key of the extension function.
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String |
getNamespace()
Return the namespace of the extension function.
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protected void |
reportWrongNumberArgs()
Constructs and throws a WrongNumberArgException with the appropriate
message for this function object.
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void |
setArg(Expression arg,
int argNum)
Set an argument expression for a function.
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String |
toString()
Return the name of the extesion function in string format
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callVisitors, deepEquals, postCompileStep
asIterator, asIteratorRaw, asNode, assertion, bool, canTraverseOutsideSubtree, error, execute, execute, execute, executeCharsToContentHandler, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isNodesetExpr, isSameClass, isStableNumber, num, warn, xstr
public FuncExtFunction(String namespace, String extensionName, Object methodKey)
namespace
- The namespace for the extension function, which should
not normally be null or empty.extensionName
- The local name of the extension.methodKey
- Unique method key, which is passed to
ExtensionsTable#extFunction in order to allow caching
of the method.public void fixupVariables(Vector vars, int globalsSize)
fixupVariables
in class Expression
vars
- List of QNames that correspond to variables. This list
should be searched backwards for the first qualified name that
corresponds to the variable reference qname. The position of the
QName in the vector from the start of the vector will be its position
in the stack frame (but variables above the globalsTop value will need
to be offset to the current stack frame).
NEEDSDOC @param globalsSizepublic String getNamespace()
public String getFunctionName()
public Object getMethodKey()
public Expression getArg(int n)
n
- The argument number index.public int getArgCount()
public XObject execute(XPathContext xctxt) throws TransformerException
execute
in class Function
xctxt
- The current execution context.TransformerException
public void setArg(Expression arg, int argNum) throws WrongNumberArgsException
setArg
in class Function
arg
- non-null expression that represents the argument.argNum
- The argument number index.WrongNumberArgsException
- If the argNum parameter is beyond what
is specified for this function.public void checkNumberArgs(int argNum) throws WrongNumberArgsException
checkNumberArgs
in class Function
argNum
- The number of arguments that is being passed to the function.WrongNumberArgsException
public void callArgVisitors(XPathVisitor visitor)
callArgVisitors
in class Function
public void exprSetParent(ExpressionNode n)
exprSetParent
in interface ExpressionNode
exprSetParent
in class Expression
n
- The parent nodeprotected void reportWrongNumberArgs() throws WrongNumberArgsException
reportWrongNumberArgs
in class Function
WrongNumberArgsException
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