final class RelationalExpression extends BinaryExpression
operator, p1, p2
staticContext
Constructor | Description |
---|---|
RelationalExpression() |
Default constructor
|
RelationalExpression(Expression p1,
int op,
Expression p2) |
Create a relational expression identifying the two operands and the operator
|
Modifier and Type | Method | Description |
---|---|---|
Value |
evaluate(Context c) |
Evaluate the expression in a given context
|
boolean |
evaluateAsBoolean(Context c) |
Evaluate the expression in a given context
|
int |
getDataType() |
Determine the data type of the expression
|
Expression |
reduce(int dependencies,
Context context) |
Perform a partial evaluation of the expression, by eliminating specified dependencies
on the context.
|
Expression |
simplify() |
Simplify an expression
|
display, getDependencies, setDetails
containsReferences, enumerate, evaluateAsNodeSet, evaluateAsNumber, evaluateAsString, getStaticContext, indent, isContextDocumentNodeSet, make, outputStringValue, setStaticContext, usesCurrent
public RelationalExpression()
public RelationalExpression(Expression p1, int op, Expression p2)
p1
- the left-hand operandop
- the operator, as a token returned by the Tokenizer (e.g. Tokenizer.LT)p2
- the right-hand operandpublic Expression simplify() throws XPathException
simplify
in class BinaryExpression
XPathException
public Value evaluate(Context c) throws XPathException
evaluate
in class Expression
c
- the given context for evaluationXPathException
public boolean evaluateAsBoolean(Context c) throws XPathException
evaluateAsBoolean
in class Expression
c
- the given context for evaluationXPathException
public int getDataType()
getDataType
in class Expression
public Expression reduce(int dependencies, Context context) throws XPathException
reduce
in class Expression
dependencies
- The dependencies to be removedcontext
- The context to be used for the partial evaluationXPathException