com.icl.saxon.expr
Class PositionRange
(package private) class PositionRange
PositionRange: a boolean expression that tests whether the position() is
within a certain range. This expression can occur in any context but it is
optimized when it appears as a predicate (see FilterEnumerator)
containsReferences , display , enumerate , evaluate , evaluateAsBoolean , evaluateAsNodeSet , evaluateAsNumber , evaluateAsString , getDataType , getDependencies , getStaticContext , indent , isContextDocumentNodeSet , make , outputStringValue , reduce , setStaticContext , simplify , usesCurrent |
PositionRange
public PositionRange(int min,
int max)
Create a position range
display
public void display(int level)
Diagnostic print of expression structure
- display in interface Expression
evaluate
public Value evaluate(Context c)
throws XPathException
Evaluate the expression in a given context
- evaluate in interface Expression
c
- the given context for evaluation
- a BooleanValue representing the result of the numeric comparison of the two operands
evaluateAsBoolean
public boolean evaluateAsBoolean(Context c)
throws XPathException
Evaluate the expression in a given context
- evaluateAsBoolean in interface Expression
c
- the given context for evaluation
- a boolean representing the result of the numeric comparison of the two operands
getDataType
public int getDataType()
Determine the data type of the expression
- getDataType in interface Expression
getMaxPosition
protected int getMaxPosition()
Get the maximum position
getMinPosition
protected int getMinPosition()
Get the minimum position
reduce
public Expression reduce(int dependencies,
Context context)
throws XPathException
Perform a partial evaluation of the expression, by eliminating specified dependencies
on the context.
- reduce in interface Expression
dependencies
- The dependencies to be removedcontext
- The context to be used for the partial evaluation
- a new expression that does not have any of the specified
dependencies