Package net.sf.saxon.functions
Class ContextAccessorFunction
java.lang.Object
net.sf.saxon.functions.AbstractFunction
net.sf.saxon.functions.SystemFunction
net.sf.saxon.functions.ContextAccessorFunction
- All Implemented Interfaces:
Callable
,FunctionItem
,GroundedValue
,Item
,Sequence
- Direct Known Subclasses:
ContextItemAccessorFunction
,CurrentGroup
,CurrentGroupingKey
,CurrentOutputUri
,FunctionLookup
,PositionAndLast
,RegexGroup
A ContextAccessorFunction is a function that is dependent on the dynamic context. In the case
of dynamic function calls, the context is bound at the point where the function is created,
not at the point where the function is called.
-
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionabstract FunctionItem
bindContext
(XPathContext context) Bind context information to appear as part of the function's closure.call
(XPathContext context, Sequence[] arguments) Evaluate the expressionMethods inherited from class net.sf.saxon.functions.SystemFunction
dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, exportAttributes, fixArguments, getArity, getCardinality, getContextNode, getDescription, getDetails, getElaborator, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getSpecialProperties, getStaticBaseUriString, getStreamerName, getUniStringArg, hashCode, importAttributes, isSequenceVariadic, isTrustedResultType, makeCall, makeFunction, makeFunction40, makeFunctionCall, makeOptimizedFunctionCall, resultIfEmpty, setArity, setDetails, setRetainedStaticContext, supplyTypeInformation, toShortString, toString, typeCheckCaller
Methods inherited from class net.sf.saxon.functions.AbstractFunction
atomize, deepEqual40, deepEquals, effectiveBooleanValue, getAnnotations, getUnicodeStringValue, isArray, isMap, makeNewContext, simplify, typeCheck
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface net.sf.saxon.om.FunctionItem
getGenre
Methods inherited from interface net.sf.saxon.om.GroundedValue
asIterable, concatenate, containsNode, materialize
Methods inherited from interface net.sf.saxon.om.Item
getLength, getStringValue, head, isStreamed, itemAt, iterate, reduce, subsequence
Methods inherited from interface net.sf.saxon.om.Sequence
makeRepeatable
-
Constructor Details
-
ContextAccessorFunction
public ContextAccessorFunction()
-
-
Method Details
-
bindContext
Bind context information to appear as part of the function's closure. If this method has been called, the supplied context will be used in preference to the context at the point where the function is actually called.- Parameters:
context
- the context to which the function applies. Must not be null.- Throws:
XPathException
-
call
Evaluate the expression- Parameters:
context
- the dynamic evaluation contextarguments
- the values of the arguments, supplied as Sequences- Returns:
- the result of the evaluation, in the form of a Sequence
- Throws:
XPathException
- if a dynamic error occurs during the evaluation of the expression
-