Package net.sf.saxon.instruct
Class GlobalParam
- java.lang.Object
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- net.sf.saxon.expr.Expression
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- net.sf.saxon.instruct.Instruction
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- net.sf.saxon.instruct.GeneralVariable
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- net.sf.saxon.instruct.GlobalVariable
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- net.sf.saxon.instruct.GlobalParam
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- All Implemented Interfaces:
java.io.Serializable
,javax.xml.transform.SourceLocator
,LocationProvider
,SaxonLocator
,Binding
,Container
,EvaluableItem
,SequenceIterable
,TailCallReturner
,InstructionInfo
,org.xml.sax.Locator
public final class GlobalParam extends GlobalVariable
The compiled form of a global xsl:param element in the stylesheet or an external variable declared in the prolog of a Query.
The xsl:param element in XSLT has mandatory attribute name and optional attribute select. It can also be specified as required="yes" or required="no". In standard XQuery external variables are always required, and no default value can be specified; but Saxon provides an extension pragma that allows a query to specify a default.- See Also:
- Serialized Form
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Field Summary
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Fields inherited from class net.sf.saxon.instruct.GeneralVariable
evaluationMode, referenceCount, slotNumber, variableQName
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Fields inherited from class net.sf.saxon.expr.Expression
EVALUATE_METHOD, ITERATE_METHOD, locationId, PROCESS_METHOD, staticProperties
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Constructor Summary
Constructors Constructor Description GlobalParam()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description ValueRepresentation
evaluateVariable(XPathContext context)
Evaluate the variableint
getInstructionNameCode()
Get the name of this instruction for diagnostic and tracing purposes-
Methods inherited from class net.sf.saxon.instruct.GlobalVariable
getExecutable, getHostLanguage, getSelectValue, isGlobal, lookForCycles, processLeavingTail, setContainsLocals, setExecutable, setHostLanguage
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Methods inherited from class net.sf.saxon.instruct.GeneralVariable
copy, evaluateItem, explain, getCardinality, getEvaluationMode, getItemType, getLocalSlotNumber, getRequiredType, getSelectExpression, getSlotNumber, getVariableQName, init, isAssignable, isImplicitlyRequiredParam, isRequiredParam, isTunnelParam, iterate, iterateSubExpressions, optimize, promoteInst, replaceSubExpression, setAssignable, setImplicitlyRequiredParam, setReferenceCount, setRequiredParam, setRequiredType, setSelectExpression, setSlotNumber, setTunnel, setVariableQName, simplify, typeCheck
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Methods inherited from class net.sf.saxon.instruct.Instruction
assembleParams, assembleTunnelParams, computeCardinality, computeSpecialProperties, createsNewNodes, dynamicError, evaluateAsString, getConstructType, getImplementationMethod, getSourceLocator, isXSLT, process, promote
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Methods inherited from class net.sf.saxon.expr.Expression
addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, display, doPromotion, dynamicError, effectiveBooleanValue, evaluatePendingUpdates, explain, findParentOf, getColumnNumber, getColumnNumber, getContainer, getDependencies, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, getSystemId, hasLoopingSubexpression, implementsStaticTypeCheck, isUpdatingExpression, iterateEvents, markTailFunctionCalls, resetLocalStaticProperties, setContainer, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, toString, typeError
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface net.sf.saxon.expr.Container
getLocationProvider, replaceSubExpression
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Method Detail
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getInstructionNameCode
public int getInstructionNameCode()
Get the name of this instruction for diagnostic and tracing purposes- Overrides:
getInstructionNameCode
in classGeneralVariable
- Returns:
- the name of this instruction, as a name pool name code
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evaluateVariable
public ValueRepresentation evaluateVariable(XPathContext context) throws XPathException
Evaluate the variable- Specified by:
evaluateVariable
in interfaceBinding
- Overrides:
evaluateVariable
in classGlobalVariable
- Parameters:
context
- the XPath dynamic evaluation context- Returns:
- the result of evaluating the variable
- Throws:
XPathException
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