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java.lang.Objectnet.sf.saxon.expr.ComputedExpression
net.sf.saxon.expr.UnaryExpression
net.sf.saxon.expr.UntypedAtomicConverter
An UntypedAtomicConverter is an expression that converts any untypedAtomic items in a sequence to a specified type
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 | |
UntypedAtomicConverter(Expression sequence,
AtomicType requiredItemType,
boolean allConverted)
Constructor |
Method Summary | |
int |
computeSpecialProperties()
Determine the special properties of this expression |
protected java.lang.String |
displayOperator(Configuration config)
Give a string representation of the operator for use in diagnostics |
Item |
evaluateItem(XPathContext context)
Evaluate as an Item. |
ItemType |
getItemType(TypeHierarchy th)
Determine the data type of the items returned by the expression |
SequenceIterator |
iterate(XPathContext context)
Iterate over the sequence of values |
Expression |
typeCheck(StaticContext env,
ItemType contextItemType)
Type-check the expression |
Methods inherited from class net.sf.saxon.expr.UnaryExpression |
computeCardinality, display, equals, getBaseExpression, hashCode, iterateSubExpressions, optimize, promote, replaceSubExpression, simplify |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public UntypedAtomicConverter(Expression sequence, AtomicType requiredItemType, boolean allConverted)
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 untypedAtomic items in the sequence should be converted,
using the rules for "cast as".allConverted
- true if the result of this expression is a sequence in which all items
belong to the required typeMethod Detail |
public ItemType getItemType(TypeHierarchy th)
getItemType
in interface Expression
getItemType
in class UnaryExpression
th
-
public Expression typeCheck(StaticContext env, ItemType contextItemType) throws XPathException
typeCheck
in interface Expression
typeCheck
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
expressionprotected java.lang.String displayOperator(Configuration config)
displayOperator
in class UnaryExpression
config
-
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