| java.lang.Object
 net.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.BinaryExpression
net.sf.saxon.expr.VennExpression
| VennExpression | | public class VennExpression extends BinaryExpression (Code) | | An expression representing a nodeset that is a union, difference, or
intersection of two other NodeSets
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| VennExpression | | public VennExpression(Expression p1, int op, Expression p2)(Code) | | Constructor
Parameters:
p1 - the left-hand operand
Parameters:
op - the operator (union, intersection, or difference)
Parameters:
p2 - the right-hand operand |
| computeCardinality | | final public int computeCardinality()(Code) | | Determine the static cardinality of the expression
|
| computeSpecialProperties | | public int computeSpecialProperties()(Code) | | Get the static properties of this expression (other than its type). The result is
bit-signficant. These properties are used for optimizations. In general, if
property bit is set, it is true, but if it is unset, the value is unknown.
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| effectiveBooleanValue | | public boolean effectiveBooleanValue(XPathContext context) throws XPathException(Code) | | Get the effective boolean value. In the case of a union expression, this
is reduced to an OR expression, for efficiency
|
| getItemType | | final public ItemType getItemType(TypeHierarchy th)(Code) | | Determine the data type of the items returned by this expression
the data type
Parameters:
th - |
| hashCode | | public int hashCode()(Code) | | Is this expression the same as another expression?
|
| iterate | | public SequenceIterator iterate(XPathContext c) throws XPathException(Code) | | Iterate over the value of the expression. The result will always be sorted in document order,
with duplicates eliminated
Parameters:
c - The context for evaluation a SequenceIterator representing the union of the two operands |
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