Package net.sf.saxon.functions
Class GenerateId_1
java.lang.Object
net.sf.saxon.functions.AbstractFunction
net.sf.saxon.functions.SystemFunction
net.sf.saxon.functions.ScalarSystemFunction
net.sf.saxon.functions.GenerateId_1
- All Implemented Interfaces:
Callable
,FunctionItem
,GroundedValue
,Item
,Sequence
This class supports the generate-id() function with one argument
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Nested Class Summary
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionevaluate
(Item arg, XPathContext context) Abstract method that must be supplied in subclasses to perform the evaluationstatic StringValue
generateId
(NodeInfo node) Make an elaborator for this expressionint
getSpecialProperties
(Expression[] arguments) Determine the special properties of this expression.Method that may be supplied in subclasses, to indicate the result that is returned when an empty sequence is supplied as the argument value.Methods inherited from class net.sf.saxon.functions.ScalarSystemFunction
call, makeFunctionCall
Methods inherited from class net.sf.saxon.functions.SystemFunction
dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, exportAttributes, fixArguments, getArity, getCardinality, getContextNode, getDescription, getDetails, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getResultItemType, getRetainedStaticContext, getStaticBaseUriString, getStreamerName, getUniStringArg, hashCode, importAttributes, isSequenceVariadic, isTrustedResultType, makeCall, makeFunction, makeFunction40, 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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GenerateId_1
public GenerateId_1()
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Method Details
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getSpecialProperties
Determine the special properties of this expression. The generate-id() function is a special case: it is considered creative if its operand is creative, so that generate-id(f()) is not taken out of a loop- Overrides:
getSpecialProperties
in classSystemFunction
- Parameters:
arguments
- the expressions supplied as arguments in the function call- Returns:
- the properties
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resultWhenEmpty
Description copied from class:ScalarSystemFunction
Method that may be supplied in subclasses, to indicate the result that is returned when an empty sequence is supplied as the argument value. The default is to return the empty sequence- Overrides:
resultWhenEmpty
in classScalarSystemFunction
- Returns:
- the result of evaluation when the supplied argument is an empty sequence
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evaluate
Description copied from class:ScalarSystemFunction
Abstract method that must be supplied in subclasses to perform the evaluation- Specified by:
evaluate
in classScalarSystemFunction
- Parameters:
arg
- the supplied argumentcontext
- the dynamic context- Returns:
- the result of the evaluation
- Throws:
XPathException
- if a dynamic error occurs
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generateId
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getElaborator
Make an elaborator for this expression- Overrides:
getElaborator
in classSystemFunction
- Returns:
- a suitable elaborator
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