public class GeneralComparison10 extends BinaryExpression
?????? | ????? |
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protected AtomicComparer |
comparer |
protected int |
singletonOperator |
operand0, operand1, operator
EVALUATE_METHOD, ITERATE_METHOD, locationId, PROCESS_METHOD, staticProperties
?????? |
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GeneralComparison10(Expression p0,
int op,
Expression p1)
Create a general comparison identifying the two operands and the operator
|
?????? | ????? |
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int |
computeCardinality()
Determine the static cardinality.
|
Expression |
copy()
Copy an expression.
|
protected java.lang.String |
displayOperator() |
boolean |
effectiveBooleanValue(XPathContext context)
Evaluate the expression in a boolean context
|
Item |
evaluateItem(XPathContext context)
Evaluate the expression in a given context
|
ItemType |
getItemType(TypeHierarchy th)
Determine the data type of the expression
|
Expression |
optimize(ExpressionVisitor visitor,
ItemType contextItemType)
Optimize the expression
|
Expression |
typeCheck(ExpressionVisitor visitor,
ItemType contextItemType)
Type-check the expression
|
computeSpecialProperties, equals, explain, getOperands, getOperator, hashCode, isAssociative, isCommutative, isInverse, iterateSubExpressions, promote, replaceSubExpression, setFlattened, simplify, toString
addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, display, doPromotion, dynamicError, 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, iterate, iterateEvents, markTailFunctionCalls, process, resetLocalStaticProperties, setContainer, setFiltered, setLocationId, staticTypeCheck, suppressValidation, typeError
protected int singletonOperator
protected AtomicComparer comparer
public GeneralComparison10(Expression p0, int op, Expression p1)
p0
- the left-hand operandop
- the operator, as a token returned by the Tokenizer (e.g. Token.LT)p1
- the right-hand operandpublic int computeCardinality()
computeCardinality
??? BinaryExpression
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
??? BinaryExpression
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 Expression optimize(ExpressionVisitor visitor, ItemType contextItemType) throws XPathException
optimize
??? BinaryExpression
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 Item evaluateItem(XPathContext context) throws XPathException
evaluateItem
???? EvaluableItem
evaluateItem
??? Expression
context
- the given context for evaluationXPathException
- if any dynamic error occurs evaluating the
expressionpublic boolean effectiveBooleanValue(XPathContext context) throws XPathException
effectiveBooleanValue
??? Expression
context
- the given context for evaluationXPathException
- if any dynamic error occurs evaluating the
expressionpublic Expression copy()
copy
??? Expression
public ItemType getItemType(TypeHierarchy th)
getItemType
??? Expression
th
- the type hierarchy cacheprotected java.lang.String displayOperator()
displayOperator
??? BinaryExpression