Package net.sf.saxon.ma.map
Class MapFunctionSet.MapGet
java.lang.Object
net.sf.saxon.functions.AbstractFunction
net.sf.saxon.functions.SystemFunction
net.sf.saxon.ma.map.MapFunctionSet.MapGet
- All Implemented Interfaces:
Callable
,Function
,GroundedValue
,Item
,Sequence
- Enclosing class:
MapFunctionSet
Implementation of the XPath 3.1 function map:get(Map, key) => value
-
Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptioncall
(XPathContext context, Sequence[] arguments) Invoke the functionint
getCardinality
(Expression[] args) Get the cardinality, given knowledge of the actual argumentsgetResultItemType
(Expression[] args) Get the return type, given knowledge of the actual argumentsmakeOptimizedFunctionCall
(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo, Expression... arguments) Allow the function to create an optimized call based on the values of the actual argumentsvoid
supplyTypeInformation
(ExpressionVisitor visitor, ContextItemStaticInfo contextItemType, Expression[] arguments) Method called during static type checking.Methods inherited from class net.sf.saxon.functions.SystemFunction
dependsOnContextItem, dynamicCall, equals, export, exportAdditionalArguments, exportAttributes, fixArguments, getArity, getCompilerName, getContextNode, getDescription, getDetails, getErrorCodeForTypeErrors, getFunctionItemType, getFunctionName, getIntegerBounds, getNetCost, getOperandRoles, getRequiredType, getResultItemType, getRetainedStaticContext, getSpecialProperties, getStaticBaseUriString, getStreamerName, importAttributes, isTrustedResultType, makeCall, makeFunction, makeFunctionCall, resultIfEmpty, setArity, setDetails, setRetainedStaticContext, toShortString, toString, typeCheckCaller
Methods inherited from class net.sf.saxon.functions.AbstractFunction
atomize, deepEquals, effectiveBooleanValue, getAnnotations, getStringValue, getStringValueCS, isArray, isMap, makeNewContext, simplify, typeCheck
Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Methods inherited from interface net.sf.saxon.om.GroundedValue
asIterable, concatenate, containsNode, materialize
Methods inherited from interface net.sf.saxon.om.Item
getLength, head, isStreamed, itemAt, iterate, reduce, subsequence
Methods inherited from interface net.sf.saxon.om.Sequence
makeRepeatable
-
Field Details
-
pendingWarning
String pendingWarning
-
-
Constructor Details
-
MapGet
public MapGet()
-
-
Method Details
-
supplyTypeInformation
public void supplyTypeInformation(ExpressionVisitor visitor, ContextItemStaticInfo contextItemType, Expression[] arguments) throws XPathException Method called during static type checking. This method may be implemented in subclasses so that functions can take advantage of knowledge of the types of the arguments that will be supplied.- Overrides:
supplyTypeInformation
in classSystemFunction
- Parameters:
visitor
- an expression visitor, providing access to the static context and configurationcontextItemType
- information about whether the context item is set, and what its type isarguments
- the expressions appearing as arguments in the function call- Throws:
XPathException
-
getResultItemType
Get the return type, given knowledge of the actual arguments- Overrides:
getResultItemType
in classSystemFunction
- Parameters:
args
- the actual arguments supplied- Returns:
- the best available item type that the function will return
-
getCardinality
Get the cardinality, given knowledge of the actual arguments- Overrides:
getCardinality
in classSystemFunction
- Parameters:
args
- the actual arguments supplied- Returns:
- the most precise available cardinality that the function will return
-
makeOptimizedFunctionCall
public Expression makeOptimizedFunctionCall(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo, Expression... arguments) throws XPathException Allow the function to create an optimized call based on the values of the actual arguments- Overrides:
makeOptimizedFunctionCall
in classSystemFunction
- Parameters:
visitor
- the expression visitorcontextInfo
- information about the context itemarguments
- the supplied arguments to the function call. Note: modifying the contents of this array should not be attempted, it is likely to have no effect.- Returns:
- either a function call on this function, or an expression that delivers the same result, or null indicating that no optimization has taken place
- Throws:
XPathException
- if an error is detected
-
call
Description copied from interface:Function
Invoke the function- Parameters:
context
- the XPath dynamic evaluation contextarguments
- the actual arguments to be supplied- Returns:
- the result of invoking the function
- Throws:
XPathException
- if a dynamic error occurs within the function
-