public class Available extends SystemFunction implements XSLTFunction
?????? | ????? |
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static int |
ELEMENT_AVAILABLE |
static int |
FUNCTION_AVAILABLE |
static int |
TYPE_AVAILABLE |
operation
argument
EVALUATE_METHOD, ITERATE_METHOD, locationId, PROCESS_METHOD, staticProperties
?????? |
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Available() |
?????? | ????? |
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void |
checkArguments(ExpressionVisitor visitor)
Method called during static type checking
|
Item |
evaluateItem(XPathContext context)
Run-time evaluation.
|
Expression |
preEvaluate(ExpressionVisitor visitor)
preEvaluate: this method uses the static context to do early evaluation of the function
if the argument is known (which is the normal case)
|
addContextDocumentArgument, addDocToPathMap, computeCardinality, computeSpecialProperties, copy, getDetails, getErrorCodeForTypeErrors, getItemType, getRequiredType, makeSystemFunction, optimize, setDetails, useContextItemAsDefault
addExternalFunctionCallToPathMap, checkArgumentCount, equals, explain, getArguments, getDisplayName, getFunctionName, getNumberOfArguments, hashCode, iterateSubExpressions, promote, replaceSubExpression, setArguments, setFunctionName, simplify, simplifyArguments, toString, typeCheck
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, iterate, iterateEvents, markTailFunctionCalls, process, resetLocalStaticProperties, setContainer, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, typeError
public static final int ELEMENT_AVAILABLE
public static final int FUNCTION_AVAILABLE
public static final int TYPE_AVAILABLE
public void checkArguments(ExpressionVisitor visitor) throws XPathException
SystemFunction
checkArguments
??? SystemFunction
visitor
- the expression visitorXPathException
public Expression preEvaluate(ExpressionVisitor visitor) throws XPathException
preEvaluate
??? FunctionCall
visitor
- the expression visitorXPathException
public 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
expression