public class String_1 extends ScalarSystemFunction
Constructor and Description |
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String_1() |
Modifier and Type | Method and Description |
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AtomicValue |
evaluate(Item arg,
XPathContext context)
Abstract method that must be supplied in subclasses to perform the evaluation
|
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 |
makeOptimizedFunctionCall(ExpressionVisitor visitor,
ContextItemStaticInfo contextInfo,
Expression... arguments)
Allow the function to create an optimized call based on the values of the actual arguments
|
Sequence |
resultWhenEmpty()
Method that may be supplied in subclasses, to indicate the result that is returned
when an empty sequence is supplied as the argument value.
|
call, makeFunctionCall
dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, exportAttributes, fixArguments, getArity, getCardinality, getContextNode, getDescription, getDetails, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getSpecialProperties, getStaticBaseUriString, getUniStringArg, hashCode, importAttributes, isSequenceVariadic, isTrustedResultType, makeCall, makeFunction, resultIfEmpty, setArity, setDetails, setRetainedStaticContext, supplyTypeInformation, toShortString, toString, typeCheckCaller
atomize, deepEquals, effectiveBooleanValue, getAnnotations, getUnicodeStringValue, isArray, isMap, makeNewContext, simplify, typeCheck
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
getLength, getStringValue, head, isStreamed, itemAt, iterate, reduce, subsequence
asIterable, concatenate, containsNode, materialize
makeRepeatable
public AtomicValue evaluate(Item arg, XPathContext context) throws XPathException
ScalarSystemFunction
evaluate
in class ScalarSystemFunction
arg
- the supplied argumentcontext
- the dynamic contextXPathException
- if a dynamic error occurspublic Sequence resultWhenEmpty()
ScalarSystemFunction
resultWhenEmpty
in class ScalarSystemFunction
public Expression makeOptimizedFunctionCall(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo, Expression... arguments) throws XPathException
makeOptimizedFunctionCall
in class SystemFunction
visitor
- the expression visitorcontextInfo
- information about the context itemarguments
- the supplied arguments to the function callXPathException
- if an error is detectedpublic 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) 2004-2022 Saxonica Limited. All rights reserved.