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java.lang.Objectnet.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.UnaryExpression
net.sf.saxon.expr.AtomicSequenceConverter
An AtomicSequenceConverter is an expression that performs a cast on each member of a supplied sequence
| Field Summary |
| Fields inherited from class net.sf.saxon.expr.UnaryExpression |
operand |
| 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 | |
AtomicSequenceConverter(Expression sequence,
AtomicType requiredItemType)
Constructor |
|
| Method Summary | |
Expression |
analyze(StaticContext env,
ItemType contextItemType)
Type-check the expression |
int |
computeCardinality()
Determine the static cardinality of the expression |
int |
computeSpecialProperties()
Determine the special properties of this expression |
protected java.lang.String |
displayOperator(NamePool pool)
Give a string representation of the operator for use in diagnostics |
boolean |
equals(java.lang.Object other)
Is this expression the same as another expression? |
Item |
evaluateItem(XPathContext context)
Evaluate as an Item. |
ItemType |
getItemType()
Determine the data type of the items returned by the expression, if possible |
SequenceIterator |
iterate(XPathContext context)
Iterate over the sequence of values |
java.lang.Object |
map(Item item,
XPathContext context,
java.lang.Object info)
Implement the mapping function |
Expression |
simplify(StaticContext env)
Simplify an expression |
| Methods inherited from class net.sf.saxon.expr.UnaryExpression |
display, getBaseExpression, hashCode, iterateSubExpressions, promote |
| Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
public AtomicSequenceConverter(Expression sequence,
AtomicType requiredItemType)
sequence - this must be a sequence of atomic values. This is not checked; a ClassCastException
will occur if the precondition is not satisfied.requiredItemType - the item type to which all items in the sequence should be converted,
using the rules for "cast as".| Method Detail |
public Expression simplify(StaticContext env)
throws XPathException
simplify in interface Expressionsimplify in class UnaryExpressionXPathException
public Expression analyze(StaticContext env,
ItemType contextItemType)
throws XPathException
analyze in interface Expressionanalyze in class UnaryExpressionXPathExceptionpublic int computeSpecialProperties()
computeSpecialProperties in class UnaryExpressionStaticProperty.NON_CREATIVE.
public SequenceIterator iterate(XPathContext context)
throws XPathException
iterate in interface Expressioniterate in class ComputedExpressioncontext - supplies the context for evaluation
XPathException - if any dynamic error occurs evaluating the
expression
public Item evaluateItem(XPathContext context)
throws XPathException
evaluateItem in interface ExpressionevaluateItem in class ComputedExpressioncontext - The context in which the expression is to be evaluated
XPathException - if any dynamic error occurs evaluating the
expression
public java.lang.Object map(Item item,
XPathContext context,
java.lang.Object info)
throws XPathException
map in interface MappingFunctionitem - The item to be mapped.
If context is supplied, this must be the same as context.currentItem().context - The processing context. This is supplied only for mapping constructs that
set the context node, position, and size. Otherwise it is null.info - Arbitrary information supplied by the creator of the MappingIterator. It must be
read-only and immutable for the duration of the iteration.
XPathExceptionpublic ItemType getItemType()
getItemType in interface ExpressiongetItemType in class UnaryExpressionpublic int computeCardinality()
computeCardinality in class UnaryExpressionpublic boolean equals(java.lang.Object other)
equals in class UnaryExpressionprotected java.lang.String displayOperator(NamePool pool)
displayOperator in class UnaryExpression
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