Constructor and Description |
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Exists() |
Modifier and Type | Method and Description |
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BooleanValue |
call(XPathContext context,
Sequence[] arguments)
Evaluate the expression
|
java.lang.String |
getCompilerName()
Get the (local) name of a class that can be used to generate bytecode for this
system function
|
java.lang.String |
getStreamerName()
Get a name that identifies the class that can be used to evaluate this function
in streaming mode, that is, supplying one item or event at a time as it is
delivered by the parser.
|
Expression |
makeFunctionCall(Expression[] arguments)
Make an expression that either calls this function, or that is equivalent to a call
on this function
|
Expression |
makeOptimizedFunctionCall(ExpressionVisitor visitor,
ContextItemStaticInfo contextInfo,
Expression... arguments)
Allow the function to create an optimized call based on the values of the actual arguments
|
dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, exportAttributes, fixArguments, getArity, getCardinality, getContextNode, getDescription, getDetails, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getSpecialProperties, getStaticBaseUriString, importAttributes, isTrustedResultType, makeCall, makeFunction, resultIfEmpty, setArity, setDetails, setRetainedStaticContext, supplyTypeInformation, typeCheckCaller
atomize, deepEquals, effectiveBooleanValue, getAnnotations, getStringValue, getStringValueCS, isArray, isMap, makeNewContext, simplify, typeCheck
getLength, head, isStreamed, itemAt, iterate, reduce, subsequence
clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
getLength, head, itemAt, reduce, subsequence
public Expression makeFunctionCall(Expression[] arguments)
SystemFunction
makeFunctionCall
in class SystemFunction
arguments
- the supplied arguments to the function callpublic Expression makeOptimizedFunctionCall(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo, Expression... arguments) throws XPathException
SystemFunction
makeOptimizedFunctionCall
in class SystemFunction
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.XPathException
- if an error is detectedpublic BooleanValue call(XPathContext context, Sequence[] arguments) throws XPathException
context
- the dynamic evaluation contextarguments
- the values of the arguments, supplied as SequenceIteratorsXPathException
- if a dynamic error occurs during the evaluation of the expressionpublic java.lang.String getCompilerName()
SystemFunction
getCompilerName
in class SystemFunction
public java.lang.String getStreamerName()
SystemFunction
getStreamerName
in class SystemFunction
StreamerMap
. In non-streaming Saxon editions
(HE and PE) the method always returns null.Copyright (c) 2004-2018 Saxonica Limited. All rights reserved.