net.sf.saxon.functions
Class DocAvailable
java.lang.Object
net.sf.saxon.expr.Expression
net.sf.saxon.expr.FunctionCall
net.sf.saxon.functions.SystemFunction
net.sf.saxon.functions.DocAvailable
- All Implemented Interfaces:
- Serializable, SourceLocator, LocationProvider, SaxonLocator, EvaluableItem, SequenceIterable, InstructionInfo, Locator
public class DocAvailable
- extends SystemFunction
Implement the fn:doc-available() function
- See Also:
- Serialized Form
Methods inherited from class net.sf.saxon.functions.SystemFunction |
addContextDocumentArgument, addDocToPathMap, computeCardinality, computeSpecialProperties, copy, getDetails, getErrorCodeForTypeErrors, getItemType, getRequiredType, makeSystemFunction, optimize, setDetails, useContextItemAsDefault |
Methods inherited from class net.sf.saxon.expr.FunctionCall |
addExternalFunctionCallToPathMap, checkArgumentCount, equals, explain, getArguments, getDisplayName, getFunctionName, getNumberOfArguments, hashCode, iterateSubExpressions, promote, replaceSubExpression, setArguments, setFunctionName, simplify, simplifyArguments, toString, typeCheck |
Methods inherited from class net.sf.saxon.expr.Expression |
addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getExecutable, getHostLanguage, getImplementationMethod, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, getSystemId, hasLoopingSubexpression, implementsStaticTypeCheck, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterate, iterateEvents, iterateSameFocusSubExpressions, markTailFunctionCalls, process, resetLocalStaticProperties, setContainer, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, typeError |
DocAvailable
public DocAvailable()
checkArguments
public void checkArguments(ExpressionVisitor visitor)
throws XPathException
- Description copied from class:
SystemFunction
- Method called during static type checking
- Overrides:
checkArguments
in class SystemFunction
- Parameters:
visitor
- the expression visitor
- Throws:
XPathException
getStaticBaseURI
public String getStaticBaseURI()
- Get the static base URI of the expression
preEvaluate
public Expression preEvaluate(ExpressionVisitor visitor)
- preEvaluate: this method suppresses compile-time evaluation by doing nothing
- Overrides:
preEvaluate
in class FunctionCall
- Parameters:
visitor
- an expression visitor
- Returns:
- the result of the early evaluation, or the original expression, or potentially
a simplified expression
evaluateItem
public Item evaluateItem(XPathContext context)
throws XPathException
- Evaluate the expression
- Specified by:
evaluateItem
in interface EvaluableItem
- Overrides:
evaluateItem
in class Expression
- Parameters:
context
-
- Returns:
- the result of evaluating the expression (a BooleanValue)
- Throws:
XPathException
Copyright (c) Saxonica Limited. All rights reserved.