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.
-
-
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
-
-
Constructor Summary
Constructors Constructor Description UnresolvedExtensionFunctionCall(StructuredQName functionName, java.lang.Class theClass, java.util.List<java.lang.reflect.AccessibleObject> candidateMethods, Expression[] staticArgs, Configuration config, boolean debug)
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Sequencecall(XPathContext context, Sequence[] arguments)Evaluate the expressionprotected intcomputeCardinality()Compute the static cardinality of this expressionExpressioncopy(RebindingMap rebindings)Copy an expression.StructuredQNamegetFunctionName()Get the qualified of the function being calledItemTypegetItemType()Determine the data type of the expression, if possible.FunctiongetTargetFunction(XPathContext context)Get the target function to be calledExpressionresolve(SequenceType[] argTypes)ExpressiontypeCheck(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo)Type-check the expression.-
Methods inherited from class net.sf.saxon.expr.FunctionCall
addExternalFunctionCallToPathMap, adjustRequiredType, checkArgumentCount, checkArguments, checkFunctionCall, computeHashCode, equals, evaluateArguments, export, getArg, getArguments, getArity, getDisplayName, getExpressionName, getImplementationMethod, getNetCost, getOperanda, iterate, operands, optimize, pluralArguments, 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, dynamicError, effectiveBooleanValue, evaluateAsString, evaluateItem, evaluatePendingUpdates, explain, getCardinality, getConfiguration, getCost, getDependencies, getEvaluationMethod, getExtraProperty, getIntegerBounds, getInterpretedExpression, 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, markTailFunctionCalls, operandList, operandSparseList, optimizeChildren, prepareForStreaming, process, resetLocalStaticProperties, restoreParentPointers, setEvaluationMethod, setExtraProperty, setFiltered, setFlattened, setLocation, setParentExpression, setRetainedStaticContext, setRetainedStaticContextLocally, setRetainedStaticContextThoroughly, setStaticProperty, simplify, simplifyChildren, staticTypeCheck, suppressValidation, toPattern, typeCheckChildren, typeError, unordered, verifyParentPointers
-
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
-
-
-
-
Constructor Detail
-
UnresolvedExtensionFunctionCall
public UnresolvedExtensionFunctionCall(StructuredQName functionName, java.lang.Class theClass, java.util.List<java.lang.reflect.AccessibleObject> candidateMethods, Expression[] staticArgs, Configuration config, boolean debug)
-
-
Method Detail
-
getFunctionName
public StructuredQName getFunctionName()
Get the qualified of the function being called- Specified by:
getFunctionNamein classFunctionCall- Returns:
- the qualified name
-
typeCheck
public Expression typeCheck(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo) throws XPathException
Type-check the expression.- Overrides:
typeCheckin 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)
-
resolve
public Expression resolve(SequenceType[] argTypes) throws XPathException
- Throws:
XPathException
-
call
public Sequence call(XPathContext context, Sequence[] arguments) throws XPathException
Evaluate the expression- Specified by:
callin 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
-
getTargetFunction
public Function getTargetFunction(XPathContext context)
Get the target function to be called- Specified by:
getTargetFunctionin classFunctionCall- Parameters:
context- the dynamic evaluation context- Returns:
- the target function
-
getItemType
public ItemType 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:
getItemTypein classExpression- Returns:
- a value such as Type.STRING, Type.BOOLEAN, Type.NUMBER, Type.NODE, or Type.ITEM (meaning not known at compile time)
-
computeCardinality
protected int computeCardinality()
Compute the static cardinality of this expression- Specified by:
computeCardinalityin 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
-
copy
public Expression copy(RebindingMap rebindings)
Copy an expression. This makes a deep copy.- Specified by:
copyin classExpression- Parameters:
rebindings- variables to be re-bound- Returns:
- the copy of the original expression
-
-