Package net.sf.saxon.functions
Class Average
java.lang.Object
net.sf.saxon.functions.AbstractFunction
net.sf.saxon.functions.SystemFunction
net.sf.saxon.functions.FoldingFunction
net.sf.saxon.functions.Average
- All Implemented Interfaces:
Callable
,FunctionItem
,GroundedValue
,Item
,Sequence
Implementation of the fn:avg function
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint
getCardinality
(Expression[] arguments) Determine the cardinality of the function.getFold
(XPathContext context, Sequence... additionalArguments) Create the Fold object which actually performs the evaluation.Methods inherited from class net.sf.saxon.functions.FoldingFunction
call, getStreamerName
Methods inherited from class net.sf.saxon.functions.SystemFunction
dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, exportAttributes, fixArguments, getArity, getContextNode, getDescription, getDetails, getElaborator, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getSpecialProperties, getStaticBaseUriString, 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
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Constructor Details
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Average
public Average()
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Method Details
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getCardinality
Determine the cardinality of the function.- Overrides:
getCardinality
in classSystemFunction
- Parameters:
arguments
- the actual arguments supplied- Returns:
- the most precise available cardinality that the function will return
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getFold
Create the Fold object which actually performs the evaluation.- Specified by:
getFold
in classFoldingFunction
- Parameters:
context
- the dynamic evaluation contextadditionalArguments
- the values of all arguments other than the first.- Returns:
- the Fold object used to compute the function
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