public final class UntypedAtomicConverter extends UnaryExpression
operand
EVALUATE_METHOD, ITERATE_METHOD, locationId, PROCESS_METHOD, staticProperties
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UntypedAtomicConverter(Expression sequence,
AtomicType requiredItemType,
boolean allConverted)
Constructor
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boolean |
areAllItemsConverted()
Determine whether all items are to be converted, or only the subset that are untypedAtomic
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int |
computeCardinality()
Determine the static cardinality.
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int |
computeSpecialProperties()
Determine the special properties of this expression
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Expression |
copy()
Copy an expression.
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protected java.lang.String |
displayOperator(Configuration config)
Give a string representation of the operator for use in diagnostics
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Item |
evaluateItem(XPathContext context)
Evaluate as an Item.
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void |
explain(ExpressionPresenter out)
Diagnostic print of expression structure.
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ItemType |
getItemType(TypeHierarchy th)
Determine the data type of the items returned by the expression
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ItemType |
getRequiredItemType()
Get the item type to which untyped atomic items must be converted
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SequenceIterator |
iterate(XPathContext context)
Iterate over the sequence of values
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Expression |
typeCheck(ExpressionVisitor visitor,
ItemType contextItemType)
Type-check the expression
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displayExpressionName, equals, getBaseExpression, hashCode, iterateSubExpressions, optimize, promote, replaceSubExpression, simplify, toString
addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, display, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, findParentOf, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getExecutable, getHostLanguage, getImplementationMethod, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, getSystemId, hasLoopingSubexpression, implementsStaticTypeCheck, isUpdatingExpression, iterateEvents, markTailFunctionCalls, process, resetLocalStaticProperties, setContainer, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, typeError
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 typepublic ItemType getRequiredItemType()
public boolean areAllItemsConverted()
public ItemType getItemType(TypeHierarchy th)
getItemType
??? UnaryExpression
th
- the type hierarchy cachepublic int computeCardinality()
UnaryExpression
computeCardinality
??? UnaryExpression
StaticProperty.ALLOWS_ZERO_OR_ONE
,
StaticProperty.EXACTLY_ONE
, StaticProperty.ALLOWS_ONE_OR_MORE
,
StaticProperty.ALLOWS_ZERO_OR_MORE
public Expression typeCheck(ExpressionVisitor visitor, ItemType contextItemType) throws XPathException
typeCheck
??? UnaryExpression
visitor
- an expression visitorcontextItemType
- the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPE
XPathException
- if an error is discovered during this phase
(typically a type error)public int computeSpecialProperties()
public Expression copy()
copy
??? Expression
public SequenceIterator iterate(XPathContext context) throws XPathException
iterate
???? SequenceIterable
iterate
??? Expression
context
- supplies the context for evaluationXPathException
- if any dynamic error occurs evaluating the
expressionpublic Item evaluateItem(XPathContext context) throws XPathException
evaluateItem
???? EvaluableItem
evaluateItem
??? Expression
context
- The context in which the expression is to be evaluatedXPathException
- if any dynamic error occurs evaluating the
expressionpublic void explain(ExpressionPresenter out)
explain
??? UnaryExpression
out
- the expression presenter used to display the structureprotected java.lang.String displayOperator(Configuration config)
UnaryExpression
displayOperator
??? UnaryExpression