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java.lang.Objectnet.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.BinaryExpression
net.sf.saxon.expr.VennExpression
An expression representing a nodeset that is a union, difference, or intersection of two other NodeSets
| Field Summary |
| Fields inherited from class net.sf.saxon.expr.BinaryExpression |
operand0, operand1, operator |
| Fields inherited from class net.sf.saxon.expr.ComputedExpression |
locationId, staticProperties |
| Fields inherited from interface net.sf.saxon.expr.Expression |
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD |
| Constructor Summary | |
VennExpression(Expression p1,
int op,
Expression p2)
Constructor |
|
| Method Summary | |
int |
computeCardinality()
Determine the static cardinality of the expression |
int |
computeSpecialProperties()
Get the static properties of this expression (other than its type). |
boolean |
effectiveBooleanValue(XPathContext context)
Get the effective boolean value. |
ItemType |
getItemType(TypeHierarchy th)
Determine the data type of the items returned by this expression |
int |
hashCode()
Is this expression the same as another expression? |
SequenceIterator |
iterate(XPathContext c)
Iterate over the value of the expression. |
Expression |
simplify(StaticContext env)
Simplify the expression |
Expression |
typeCheck(StaticContext env,
ItemType contextItemType)
Type-check the expression |
| Methods inherited from class net.sf.saxon.expr.BinaryExpression |
display, displayOperator, equals, getOperands, getOperator, isAssociative, isCommutative, isInverse, iterateSubExpressions, optimize, promote, replaceSubExpression |
| Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
public VennExpression(Expression p1,
int op,
Expression p2)
p1 - the left-hand operandop - the operator (union, intersection, or difference)p2 - the right-hand operand| Method Detail |
public final ItemType getItemType(TypeHierarchy th)
th -
public final int computeCardinality()
computeCardinality in class BinaryExpressionpublic int computeSpecialProperties()
computeSpecialProperties in class BinaryExpressionStaticProperty.NON_CREATIVE. This is overridden
for some subclasses.
public Expression simplify(StaticContext env)
throws XPathException
simplify in interface Expressionsimplify in class BinaryExpressionXPathException
public Expression typeCheck(StaticContext env,
ItemType contextItemType)
throws XPathException
typeCheck in interface ExpressiontypeCheck in class BinaryExpressionXPathExceptionpublic int hashCode()
hashCode in class BinaryExpression
public SequenceIterator iterate(XPathContext c)
throws XPathException
iterate in interface Expressioniterate in class ComputedExpressionc - The context for evaluation
XPathException - if any dynamic error occurs evaluating the
expression
public boolean effectiveBooleanValue(XPathContext context)
throws XPathException
effectiveBooleanValue in interface ExpressioneffectiveBooleanValue in class ComputedExpressioncontext - The context in which the expression is to be evaluated
XPathException - if any dynamic error occurs evaluating the
expression
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