public class SingletonComparison extends BinaryExpression implements ComparisonExpression
operand0, operand1, operator
EVALUATE_METHOD, ITERATE_METHOD, locationId, PROCESS_METHOD, staticProperties
?????? |
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SingletonComparison(Expression p1,
int operator,
Expression p2) |
?????? | ????? |
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int |
computeCardinality()
Determine the static cardinality.
|
boolean |
convertsUntypedToOther()
Determine whether untyped atomic values should be converted to the type of the other operand
|
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
|
AtomicComparer |
getAtomicComparer()
Get the AtomicComparer used to compare atomic values.
|
ItemType |
getItemType(TypeHierarchy th)
Determine the data type of the expression
|
int |
getSingletonOperator()
Get the primitive (singleton) operator used: one of Token.FEQ, Token.FNE, Token.FLT, Token.FGT,
Token.FLE, Token.FGE
|
void |
setAtomicComparer(AtomicComparer comp) |
computeSpecialProperties, equals, explain, getOperands, getOperator, hashCode, isAssociative, isCommutative, isInverse, iterateSubExpressions, optimize, promote, replaceSubExpression, setFlattened, simplify, toString, typeCheck
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
getOperands
public SingletonComparison(Expression p1, int operator, Expression p2)
public void setAtomicComparer(AtomicComparer comp)
public AtomicComparer getAtomicComparer()
ComparisonExpression
getAtomicComparer
???? ComparisonExpression
public int getSingletonOperator()
ComparisonExpression
getSingletonOperator
???? ComparisonExpression
public boolean convertsUntypedToOther()
convertsUntypedToOther
???? ComparisonExpression
public int computeCardinality()
computeCardinality
??? BinaryExpression
StaticProperty.ALLOWS_ZERO_OR_ONE
,
StaticProperty.EXACTLY_ONE
, StaticProperty.ALLOWS_ONE_OR_MORE
,
StaticProperty.ALLOWS_ZERO_OR_MORE
public ItemType getItemType(TypeHierarchy th)
getItemType
??? Expression
th
- the type hierarchy cachepublic Expression copy()
copy
??? Expression
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
expressionprotected java.lang.String displayOperator()
displayOperator
??? BinaryExpression