org.apache.xpath.functions
Class Function2Args
- ExpressionNode, ExpressionOwner, java.io.Serializable, SourceLocator, XPathVisitable
public class Function2Args
Base class for functions that accept two arguments.
asIterator , asIteratorRaw , asNode , assertion , bool , canTraverseOutsideSubtree , deepEquals , error , execute , execute , execute , execute , executeCharsToContentHandler , exprAddChild , exprGetChild , exprGetNumChildren , exprGetParent , exprSetParent , fixupVariables , getColumnNumber , getExpressionOwner , getLineNumber , getPublicId , getSystemId , isNodesetExpr , isStableNumber , num , warn , xstr |
canTraverseOutsideSubtree
public boolean canTraverseOutsideSubtree()
Tell if this expression or it's subexpressions can traverse outside
the current subtree.
- canTraverseOutsideSubtree in interface FunctionOneArg
- true if traversal outside the context node's subtree can occur.
checkNumberArgs
public void checkNumberArgs(int argNum)
throws WrongNumberArgsException
Check that the number of arguments passed to this function is correct.
- checkNumberArgs in interface FunctionOneArg
argNum
- The number of arguments that is being passed to the function.
fixupVariables
public void fixupVariables(java.util.Vector vars,
int globalsSize)
This function is used to fixup variables from QNames to stack frame
indexes at stylesheet build time.
- fixupVariables in interface FunctionOneArg
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).
getArg1
public Expression getArg1()
Return the second argument passed to the function (at index 1).
- An expression that represents the second argument passed to the
function.
setArg
public void setArg(Expression arg,
int argNum)
throws WrongNumberArgsException
Set an argument expression for a function. This method is called by the
XPath compiler.
- setArg in interface FunctionOneArg
arg
- non-null expression that represents the argument.argNum
- The argument number index.
Copyright B) 2005 Apache XML Project. All Rights Reserved.