Package net.sf.saxon.functions
Class Innermost
java.lang.Object
net.sf.saxon.functions.AbstractFunction
net.sf.saxon.functions.SystemFunction
net.sf.saxon.functions.Innermost
- All Implemented Interfaces:
Callable
,FunctionItem
,GroundedValue
,Item
,Sequence
This class implements the function fn:has-children(), which is a standard function in XPath 3.0
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptioncall
(XPathContext context, Sequence[] arguments) Evaluate the expression in a dynamic callvoid
Export any context attributes held within the SystemFunction object.int
getSpecialProperties
(Expression[] arguments) Determine the special properties of this function.void
importAttributes
(Properties attributes) Import any attributes found in the export file, that is, any attributes output using the exportAttributes methodmakeOptimizedFunctionCall
(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo, Expression... arguments) Allow the function to create an optimized call based on the values of the actual argumentsMethods inherited from class net.sf.saxon.functions.SystemFunction
dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, fixArguments, getArity, getCardinality, getContextNode, getDescription, getDetails, getElaborator, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getStaticBaseUriString, getStreamerName, getUniStringArg, hashCode, isSequenceVariadic, isTrustedResultType, makeCall, makeFunction, makeFunction40, makeFunctionCall, 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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Innermost
public Innermost()
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Method Details
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getSpecialProperties
Description copied from class:SystemFunction
Determine the special properties of this function. The general rule is that a system function call is non-creative unless more details are defined in a subclass.- Overrides:
getSpecialProperties
in classSystemFunction
- Parameters:
arguments
- the actual arguments supplied in a call to the function- Returns:
- the properties
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makeOptimizedFunctionCall
public Expression makeOptimizedFunctionCall(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo, Expression... arguments) throws XPathException Allow the function to create an optimized call based on the values of the actual arguments- Overrides:
makeOptimizedFunctionCall
in classSystemFunction
- Parameters:
visitor
- the expression visitorcontextInfo
- information about the context itemarguments
- the supplied arguments to the function call. Note: modifying the contents of this array should not be attempted, it is likely to have no effect.- Returns:
- either a function call on this function, or an expression that delivers the same result, or null indicating that no optimization has taken place
- Throws:
XPathException
- if an error is detected
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call
Evaluate the expression in a dynamic call- 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
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innermost
- Throws:
XPathException
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exportAttributes
Description copied from class:SystemFunction
Export any context attributes held within the SystemFunction object. The implementation will normally make one or more calls on out.emitAttribute(name, value).- Overrides:
exportAttributes
in classSystemFunction
- Parameters:
out
- the export destination
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importAttributes
Description copied from class:SystemFunction
Import any attributes found in the export file, that is, any attributes output using the exportAttributes method- Overrides:
importAttributes
in classSystemFunction
- Parameters:
attributes
- the attributes, as a properties object- Throws:
XPathException
- if errors are found in the SEF file
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