Constructor Detail

• ExtensionFunction

  public ExtensionFunction(QName functionName,
                   Expression[] args)

  Create a new ExtensionFunction.

  Parameters:

  functionName - name of the function

  args - Expression[] of function args

Method Detail

• getFunctionName

  public QName getFunctionName()

  Get the function name

  Returns:

  QName

• computeContextDependent

  public boolean computeContextDependent()

  An extension function gets the current context, therefore it MAY be context dependent.

  Overrides:

  computeContextDependent in class Operation

  Returns:

  true

• toString

  public String toString()

  Overrides:

  toString in class Object

• compute

  public Object compute(EvalContext context)

  Description copied from class: Expression
  Evaluates the expression. If the result is a node set, returns the first element of the node set.

  Specified by:

  compute in class Expression

  Parameters:

  context - evaluation context

  Returns:

  Object

• computeValue

  public Object computeValue(EvalContext context)

  Description copied from class: Expression
  Evaluates the expression. If the result is a node set, returns the first element of the node set.

  Specified by:

  computeValue in class Expression

  Parameters:

  context - evaluation context

  Returns:

  Object