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java.lang.Objectnet.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.UnaryExpression
net.sf.saxon.expr.Atomizer
An Atomizer is an expression corresponding essentially to the fn:data() function: it maps a sequence by replacing nodes with their typed values
Nested Class Summary | |
static class |
Atomizer.AtomizingFunction
Implement the mapping function |
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 | |
Atomizer(Expression sequence,
Configuration config)
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 |
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 |
Expression |
simplify(StaticContext env)
Simplify an expression |
Methods inherited from class net.sf.saxon.expr.UnaryExpression |
display, equals, getBaseExpression, hashCode, iterateSubExpressions, promote |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public Atomizer(Expression sequence, Configuration config)
sequence
- the sequence to be atomizedconfig
- the Configuration. Used only for optimization, may be null. Atomization is faster if
it is known in advance that all nodes will be untyped.Method Detail |
public Expression simplify(StaticContext env) throws XPathException
simplify
in interface Expression
simplify
in class UnaryExpression
XPathException
public Expression analyze(StaticContext env, ItemType contextItemType) throws XPathException
analyze
in interface Expression
analyze
in class UnaryExpression
XPathException
public int computeSpecialProperties()
computeSpecialProperties
in class UnaryExpression
StaticProperty.NON_CREATIVE
.public SequenceIterator iterate(XPathContext context) throws XPathException
iterate
in interface Expression
iterate
in class ComputedExpression
context
- supplies the context for evaluation
XPathException
- if any dynamic error occurs evaluating the
expressionpublic Item evaluateItem(XPathContext context) throws XPathException
evaluateItem
in interface Expression
evaluateItem
in class ComputedExpression
context
- The context in which the expression is to be evaluated
XPathException
- if any dynamic error occurs evaluating the
expressionpublic ItemType getItemType()
getItemType
in interface Expression
getItemType
in class UnaryExpression
public int computeCardinality()
computeCardinality
in class UnaryExpression
protected java.lang.String displayOperator(NamePool pool)
displayOperator
in class UnaryExpression
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