Package net.sf.saxon.functions
Class Innermost
- java.lang.Object
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- net.sf.saxon.functions.AbstractFunction
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- net.sf.saxon.functions.SystemFunction
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- net.sf.saxon.functions.Innermost
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- All Implemented Interfaces:
Callable,Function,GroundedValue,Item,Sequence
public class Innermost extends SystemFunction
This class implements the function fn:has-children(), which is a standard function in XPath 3.0
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Constructor Summary
Constructors Constructor Description Innermost()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Sequencecall(XPathContext context, Sequence[] arguments)Evaluate the expression in a dynamic callvoidexportAttributes(ExpressionPresenter out)Export any context attributes held within the SystemFunction object.intgetSpecialProperties(Expression[] arguments)Determine the special properties of this function.voidimportAttributes(java.util.Properties attributes)Import any attributes found in the export file, that is, any attributes output using the exportAttributes methodSequenceIteratorinnermost(SequenceIterator in)ExpressionmakeOptimizedFunctionCall(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo, Expression... arguments)Allow the function to create an optimized call based on the values of the actual arguments-
Methods inherited from class net.sf.saxon.functions.SystemFunction
dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, fixArguments, getArity, getCardinality, getCompilerName, getContextNode, getDescription, getDetails, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getStaticBaseUriString, getStreamerName, isTrustedResultType, makeCall, makeFunction, makeFunctionCall, resultIfEmpty, setArity, setDetails, setRetainedStaticContext, supplyTypeInformation, toShortString, toString, typeCheckCaller
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Methods inherited from class net.sf.saxon.functions.AbstractFunction
atomize, deepEquals, effectiveBooleanValue, getAnnotations, getStringValue, getStringValueCS, isArray, isMap, makeNewContext, simplify, typeCheck
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Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface net.sf.saxon.om.GroundedValue
asIterable, concatenate, containsNode, materialize
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Methods inherited from interface net.sf.saxon.om.Item
getLength, head, isStreamed, itemAt, iterate, reduce, subsequence
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Methods inherited from interface net.sf.saxon.om.Sequence
makeRepeatable
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Method Detail
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getSpecialProperties
public int getSpecialProperties(Expression[] arguments)
Description copied from class:SystemFunctionDetermine 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:
getSpecialPropertiesin classSystemFunction- Parameters:
arguments- the actual arguments supplied in a call to the function
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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:
makeOptimizedFunctionCallin 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
public Sequence call(XPathContext context, Sequence[] arguments) throws XPathException
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
public SequenceIterator innermost(SequenceIterator in) throws XPathException
- Throws:
XPathException
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exportAttributes
public void exportAttributes(ExpressionPresenter out)
Description copied from class:SystemFunctionExport any context attributes held within the SystemFunction object. The implementation will normally make one or more calls on out.emitAttribute(name, value).- Overrides:
exportAttributesin classSystemFunction- Parameters:
out- the export destination
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importAttributes
public void importAttributes(java.util.Properties attributes) throws XPathExceptionDescription copied from class:SystemFunctionImport any attributes found in the export file, that is, any attributes output using the exportAttributes method- Overrides:
importAttributesin classSystemFunction- Parameters:
attributes- the attributes, as a properties object- Throws:
XPathException
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