Package com.saxonica.config
Class JavaExtensionLibrary.UnresolvedExtensionFunctionCall
java.lang.Object
net.sf.saxon.expr.Expression
net.sf.saxon.expr.FunctionCall
com.saxonica.config.JavaExtensionLibrary.UnresolvedExtensionFunctionCall
- All Implemented Interfaces:
Callable
,ExportAgent
,Locatable
,IdentityComparable
,Traceable
- Enclosing class:
JavaExtensionLibrary
public class JavaExtensionLibrary.UnresolvedExtensionFunctionCall
extends FunctionCall
implements Callable
Inner class representing an unresolved extension function call. This arises when there is insufficient
static type information available at the time the function call is parsed to determine which of several
candidate Java methods to invoke. The function call cannot be executed; it must be resolved to an
actual Java method during the analysis phase.
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Nested Class Summary
Nested classes/interfaces inherited from class net.sf.saxon.expr.FunctionCall
FunctionCall.FunctionCallElaborator
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Field Summary
Fields inherited from class net.sf.saxon.expr.Expression
EFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, ITEM_FEED_METHOD, ITERATE_METHOD, MAX_COST, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, PROCESS_METHOD, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, UPDATE_METHOD, WATCH_METHOD
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Constructor Summary
ConstructorsConstructorDescriptionUnresolvedExtensionFunctionCall
(StructuredQName functionName, Class theClass, List<AccessibleObject> candidateMethods, Expression[] staticArgs, Configuration config, boolean debug) -
Method Summary
Modifier and TypeMethodDescriptioncall
(XPathContext context, Sequence[] arguments) Evaluate the expressionprotected int
Compute the static cardinality of this expressioncopy
(RebindingMap rebindings) Copy an expression.Make an elaborator for this expressionGet the qualified of the function being calledDetermine the data type of the expression, if possible.getTargetFunction
(XPathContext context) Get the target function to be calledresolve
(SequenceType[] argTypes) typeCheck
(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo) Type-check the expression.Methods inherited from class net.sf.saxon.expr.FunctionCall
addExternalFunctionCallToPathMap, adjustRequiredType, checkArgumentCount, checkArguments, checkFunctionCall, computeHashCode, equals, evaluateItem, export, getArg, getArguments, getArity, getDisplayName, getExpressionName, getImplementationMethod, getNetCost, getOperanda, iterate, operands, optimize, plural, preEvaluate, preEvaluateIfConstant, setArg, setArguments, setOperanda, setOperanda, simplifyArguments, toShortString, toString
Methods inherited from class net.sf.saxon.expr.Expression
addToPathMap, adoptChildExpression, allowExtractingCommonSubexpressions, checkedOperands, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeSpecialProperties, computeStaticProperties, dispatchTailCall, dynamicError, effectiveBooleanValue, evaluateAsString, explain, getCardinality, getConfiguration, getCost, getDependencies, getEvaluationMethod, getExtraProperty, getIntegerBounds, getIntrinsicDependencies, getLocalRetainedStaticContext, getLocation, getObjectName, getPackageData, getParentExpression, getProperties, getProperty, getRetainedStaticContext, getScopingExpression, getSlotsUsed, getSpecialProperties, getStaticBaseURI, getStaticBaseURIString, getStaticType, getStaticUType, getStreamerName, getTracingTag, hasCompatibleStaticContext, hashCode, hasSpecialProperty, hasVariableBinding, identityHashCode, implementsStaticTypeCheck, isCallOn, isEqual, isIdentical, isInstruction, isLiftable, isMultiThreaded, isStaticPropertiesKnown, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, makeElaborator, markTailFunctionCalls, operandList, operandSparseList, optimizeChildren, prepareForStreaming, process, resetLocalStaticProperties, restoreParentPointers, setEvaluationMethod, setExtraProperty, setFiltered, setFlattened, setLocation, setParentExpression, setRetainedStaticContext, setRetainedStaticContextLocally, setRetainedStaticContextThoroughly, setStaticProperty, simplify, simplifyChildren, staticTypeCheck, supportsLazyEvaluation, suppressValidation, toPattern, typeCheckChildren, typeError, unordered, verifyParentPointers, withLocation
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface net.sf.saxon.trace.Traceable
gatherProperties
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Constructor Details
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UnresolvedExtensionFunctionCall
public UnresolvedExtensionFunctionCall(StructuredQName functionName, Class theClass, List<AccessibleObject> candidateMethods, Expression[] staticArgs, Configuration config, boolean debug)
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Method Details
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getFunctionName
Get the qualified of the function being called- Specified by:
getFunctionName
in classFunctionCall
- Returns:
- the qualified name
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typeCheck
public Expression typeCheck(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo) throws XPathException Type-check the expression.- Overrides:
typeCheck
in classFunctionCall
- Parameters:
visitor
- an expression visitorcontextInfo
- Information available statically about the context item: whether it is (possibly) absent; its static type; its streaming posture.- Returns:
- the original expression, rewritten to perform necessary run-time type checks, and to perform other type-related optimizations
- Throws:
XPathException
- if an error is discovered during this phase (typically a type error)
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resolve
- Throws:
XPathException
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call
Evaluate the expression- Specified by:
call
in interfaceCallable
- 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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getTargetFunction
Get the target function to be called- Specified by:
getTargetFunction
in classFunctionCall
- Parameters:
context
- the dynamic evaluation context- Returns:
- the target function
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getItemType
Determine the data type of the expression, if possible. All expression return sequences, in general; this method determines the type of the items within the sequence, assuming that (a) this is known in advance, and (b) it is the same for all items in the sequence.This method should always return a result, though it may be the best approximation that is available at the time.
- Specified by:
getItemType
in classExpression
- Returns:
- a value such as Type.STRING, Type.BOOLEAN, Type.NUMBER, Type.NODE, or Type.ITEM (meaning not known at compile time)
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computeCardinality
protected int computeCardinality()Compute the static cardinality of this expression- Specified by:
computeCardinality
in classExpression
- Returns:
- the computed cardinality, as one of the values
StaticProperty.ALLOWS_ZERO_OR_ONE
,StaticProperty.EXACTLY_ONE
,StaticProperty.ALLOWS_ONE_OR_MORE
,StaticProperty.ALLOWS_ZERO_OR_MORE
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copy
Copy an expression. This makes a deep copy.- Specified by:
copy
in classExpression
- Parameters:
rebindings
- variables to be re-bound- Returns:
- the copy of the original expression
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getElaborator
Make an elaborator for this expression- Overrides:
getElaborator
in classExpression
- Returns:
- an appropriate
Elaborator
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