public final class UntypedAtomicConverter extends UnaryExpression
operand
locationId, staticProperties
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD
Constructor and Description |
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UntypedAtomicConverter(Expression sequence,
AtomicType requiredItemType,
boolean allConverted)
Constructor
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Modifier and Type | Method and Description |
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int |
computeSpecialProperties()
Determine the special properties of this expression
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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
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SequenceIterator |
iterate(XPathContext context)
Iterate over the sequence of values
|
Expression |
typeCheck(StaticContext env,
ItemType contextItemType)
Type-check the expression
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computeCardinality, display, equals, getBaseExpression, hashCode, iterateSubExpressions, optimize, promote, replaceSubExpression, simplify
adoptChildExpression, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getColumnNumber, getConstructType, getDependencies, getExecutable, getHostLanguage, getImplementationMethod, getInstructionInfo, getIntrinsicDependencies, getLineNumber, getLocationId, getLocationProvider, getParentExpression, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, hasBadParentPointer, markTailFunctionCalls, process, resetStaticProperties, setLocationId, setParentExpression, setParentExpression, 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 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
env
- the static context of the expressioncontextItemType
- 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
StaticError
- if an error is discovered during this phase
(typically a type error)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 evaluationXPathException
- 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 evaluatedXPathException
- if any dynamic error occurs evaluating the
expressionprotected java.lang.String displayOperator(Configuration config)
displayOperator
in class UnaryExpression
config
-