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java.lang.Object org.apache.xpath.Expression org.apache.xpath.functions.Function org.apache.xpath.functions.FunctionOneArg
Base class for functions that accept one argument.
Field Summary | |
(package private) Expression |
m_arg0
The first argument passed to the function (at index 0). |
Fields inherited from class org.apache.xpath.Expression |
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Constructor Summary | |
FunctionOneArg()
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Method Summary | |
void |
callArgVisitors(XPathVisitor visitor)
Call the visitors for the function arguments. |
boolean |
canTraverseOutsideSubtree()
Tell if this expression or it's subexpressions can traverse outside the current subtree. |
void |
checkNumberArgs(int argNum)
Check that the number of arguments passed to this function is correct. |
boolean |
deepEquals(Expression expr)
Compare this object with another object and see if they are equal, include the sub heararchy. |
void |
fixupVariables(Vector vars,
int globalsSize)
This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time. |
Expression |
getArg0()
Return the first argument passed to the function (at index 0). |
Expression |
getExpression()
Get the raw Expression object that this class wraps. |
protected void |
reportWrongNumberArgs()
Constructs and throws a WrongNumberArgException with the appropriate message for this function object. |
void |
setArg(Expression arg,
int argNum)
Set an argument expression for a function. |
void |
setExpression(Expression exp)
Set the raw expression object for this object. |
Methods inherited from class org.apache.xpath.functions.Function |
callVisitors, execute, postCompileStep |
Methods inherited from class org.apache.xpath.Expression |
asIterator, asIteratorRaw, asNode, assertion, bool, error, execute, execute, execute, executeCharsToContentHandler, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isNodesetExpr, isSameClass, isStableNumber, num, warn, xstr |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
Expression m_arg0
Constructor Detail |
public FunctionOneArg()
Method Detail |
public Expression getArg0()
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 greater than 0.public void checkNumberArgs(int argNum) throws WrongNumberArgsException
checkNumberArgs
in class Function
argNum
- The number of arguments that is being passed to the function.
WrongNumberArgsException
protected void reportWrongNumberArgs() throws WrongNumberArgsException
reportWrongNumberArgs
in class Function
WrongNumberArgsException
public boolean canTraverseOutsideSubtree()
canTraverseOutsideSubtree
in class Expression
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).public void callArgVisitors(XPathVisitor visitor)
Function
callArgVisitors
in class Function
XPathVisitable#callVisitors(ExpressionOwner, XPathVisitor)
public Expression getExpression()
ExpressionOwner
getExpression
in interface ExpressionOwner
ExpressionOwner.getExpression()
public void setExpression(Expression exp)
ExpressionOwner
setExpression
in interface ExpressionOwner
exp
- the raw Expression object, which should not normally be null.ExpressionOwner.setExpression(Expression)
public boolean deepEquals(Expression expr)
Expression
deepEquals
in class Function
Expression.deepEquals(Expression)
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