Package com.github.javaparser.ast.expr
Class TypePatternExpr
java.lang.Object
com.github.javaparser.ast.Node
com.github.javaparser.ast.expr.Expression
com.github.javaparser.ast.expr.PatternExpr
com.github.javaparser.ast.expr.TypePatternExpr
- All Implemented Interfaces:
NodeWithFinalModifier<TypePatternExpr>
,NodeWithModifiers<TypePatternExpr>
,NodeWithRange<Node>
,NodeWithSimpleName<TypePatternExpr>
,NodeWithTokenRange<Node>
,NodeWithType<PatternExpr,
,Type> Observable
,Visitable
,HasParentNode<Node>
,Cloneable
public class TypePatternExpr
extends PatternExpr
implements NodeWithSimpleName<TypePatternExpr>, NodeWithFinalModifier<TypePatternExpr>
The instanceof statement
Java 1.0 to 13
Not available.Java 14
Since JDK14, it is possible to bind a variable that is cast to the type being tested against. This is referred to as aPattern
within JEP305,
and avoids the need to cast to the desired type.
Example:
tool instanceof Drill d
^^^^^^^
Pattern
Note: While this is exclusively used within
instanceof
operators for now, JEP305 suggests this might
be used more widely in the future (e.g. in switch expressions/statements).
JDK14 Grammar
Per JEP305 (not currently listed within the JLS):Pattern:
Type Identifier
- See Also:
-
Nested Class Summary
Nested classes/interfaces inherited from class com.github.javaparser.ast.Node
Node.BreadthFirstIterator, Node.DirectChildrenIterator, Node.ObserverRegistrationMode, Node.ParentsVisitor, Node.Parsedness, Node.PostOrderIterator, Node.PreOrderIterator, Node.TreeTraversal
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Field Summary
FieldsFields inherited from class com.github.javaparser.ast.expr.Expression
EXCLUDE_ENCLOSED_EXPR, IS_NOT_ENCLOSED_EXPR
Fields inherited from class com.github.javaparser.ast.Node
ABSOLUTE_BEGIN_LINE, ABSOLUTE_END_LINE, LINE_SEPARATOR_KEY, NODE_BY_BEGIN_POSITION, PHANTOM_KEY, prettyPrinterNoCommentsConfiguration, PRINTER_KEY, SYMBOL_RESOLVER_KEY
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Constructor Summary
ConstructorsConstructorDescriptionTypePatternExpr
(NodeList<Modifier> modifiers, Type type, SimpleName name) TypePatternExpr
(TokenRange tokenRange, NodeList<Modifier> modifiers, Type type, SimpleName name) This constructor is used by the parser and is considered private. -
Method Summary
Modifier and TypeMethodDescription<R,
A> R accept
(GenericVisitor<R, A> v, A arg) Accept method for visitor support.<A> void
accept
(VoidVisitor<A> v, A arg) Accept method for visitor support.clone()
Return the modifiers of this variable declaration.getName()
void
ifTypePatternExpr
(Consumer<TypePatternExpr> action) boolean
boolean
boolean
setModifiers
(NodeList<Modifier> modifiers) setName
(SimpleName name) Methods inherited from class com.github.javaparser.ast.expr.PatternExpr
asPatternExpr, getType, ifPatternExpr, isPatternExpr, setType, toPatternExpr
Methods inherited from class com.github.javaparser.ast.expr.Expression
appearsInAssignmentContext, appearsInInvocationContext, asAnnotationExpr, asArrayAccessExpr, asArrayCreationExpr, asArrayInitializerExpr, asAssignExpr, asBinaryExpr, asBooleanLiteralExpr, asCastExpr, asCharLiteralExpr, asClassExpr, asConditionalExpr, asDoubleLiteralExpr, asEnclosedExpr, asFieldAccessExpr, asInstanceOfExpr, asIntegerLiteralExpr, asLambdaExpr, asLiteralExpr, asLiteralStringValueExpr, asLongLiteralExpr, asMarkerAnnotationExpr, asMethodCallExpr, asMethodReferenceExpr, asNameExpr, asNormalAnnotationExpr, asNullLiteralExpr, asObjectCreationExpr, asRecordPatternExpr, asSingleMemberAnnotationExpr, asStringLiteralExpr, asSuperExpr, asSwitchExpr, asTextBlockLiteralExpr, asThisExpr, asTypeExpr, asUnaryExpr, asVariableDeclarationExpr, calculateResolvedType, elidesTypeArguments, ifAnnotationExpr, ifArrayAccessExpr, ifArrayCreationExpr, ifArrayInitializerExpr, ifAssignExpr, ifBinaryExpr, ifBooleanLiteralExpr, ifCastExpr, ifCharLiteralExpr, ifClassExpr, ifConditionalExpr, ifDoubleLiteralExpr, ifEnclosedExpr, ifFieldAccessExpr, ifInstanceOfExpr, ifIntegerLiteralExpr, ifLambdaExpr, ifLiteralExpr, ifLiteralStringValueExpr, ifLongLiteralExpr, ifMarkerAnnotationExpr, ifMethodCallExpr, ifMethodReferenceExpr, ifNameExpr, ifNormalAnnotationExpr, ifNullLiteralExpr, ifObjectCreationExpr, ifRecordPatternExpr, ifSingleMemberAnnotationExpr, ifStringLiteralExpr, ifSuperExpr, ifSwitchExpr, ifTextBlockLiteralExpr, ifThisExpr, ifTypeExpr, ifUnaryExpr, ifVariableDeclarationExpr, isAnnotationExpr, isArrayAccessExpr, isArrayCreationExpr, isArrayInitializerExpr, isAssignExpr, isAssignmentContext, isBinaryExpr, isBooleanLiteralExpr, isCastExpr, isCharLiteralExpr, isClassExpr, isConditionalExpr, isDoubleLiteralExpr, isEnclosedExpr, isFieldAccessExpr, isInstanceOfExpr, isIntegerLiteralExpr, isInvocationContext, isLambdaExpr, isLiteralExpr, isLiteralStringValueExpr, isLongLiteralExpr, isMarkerAnnotationExpr, isMethodCallExpr, isMethodReferenceExpr, isNameExpr, isNormalAnnotationExpr, isNullLiteralExpr, isObjectCreationExpr, isPolyExpression, isQualified, isRecordPatternExpr, isSingleMemberAnnotationExpr, isStandaloneExpression, isStringLiteralExpr, isSuperExpr, isSwitchExpr, isTextBlockLiteralExpr, isThisExpr, isTypeExpr, isUnaryExpr, isVariableDeclarationExpr, toAnnotationExpr, toArrayAccessExpr, toArrayCreationExpr, toArrayInitializerExpr, toAssignExpr, toBinaryExpr, toBooleanLiteralExpr, toCastExpr, toCharLiteralExpr, toClassExpr, toConditionalExpr, toDoubleLiteralExpr, toEnclosedExpr, toFieldAccessExpr, toInstanceOfExpr, toIntegerLiteralExpr, toLambdaExpr, toLiteralExpr, toLiteralStringValueExpr, toLongLiteralExpr, toMarkerAnnotationExpr, toMethodCallExpr, toMethodReferenceExpr, toNameExpr, toNormalAnnotationExpr, toNullLiteralExpr, toObjectCreationExpr, toRecordPatternExpr, toSingleMemberAnnotationExpr, toStringLiteralExpr, toSuperExpr, toSwitchExpr, toTextBlockLiteralExpr, toThisExpr, toTypeExpr, toUnaryExpr, toVariableDeclarationExpr
Methods inherited from class com.github.javaparser.ast.Node
addOrphanComment, containsData, createDefaultPrinter, createDefaultPrinter, customInitialization, equals, findAll, findAll, findAll, findByRange, findCompilationUnit, findData, findFirst, findFirst, findFirst, findRootNode, getAllContainedComments, getChildNodes, getChildNodesByType, getComment, getData, getDataKeys, getDefaultPrinterConfiguration, getLineEndingStyle, getLineEndingStyleOrDefault, getNodesByType, getOrphanComments, getParentNode, getParentNodeForChildren, getParsed, getPrinter, getPrinter, getRange, getSymbolResolver, getTokenRange, hashCode, hasScope, isAncestorOf, isPhantom, isRegistered, notifyPropertyChange, register, register, registerForSubtree, remove, removeComment, removeData, removeForced, removeOrphanComment, replace, setAsParentNodeOf, setAsParentNodeOf, setBlockComment, setComment, setData, setLineComment, setParentNode, setParsed, setRange, setTokenRange, stream, stream, toString, toString, tryAddImportToParentCompilationUnit, unregister, walk, walk, walk
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface com.github.javaparser.HasParentNode
findAncestor, findAncestor, findAncestor, hasParentNode, isDescendantOf
Methods inherited from interface com.github.javaparser.ast.nodeTypes.modifiers.NodeWithFinalModifier
isFinal, setFinal
Methods inherited from interface com.github.javaparser.ast.nodeTypes.NodeWithModifiers
addModifier, getAccessSpecifier, hasModifier, removeModifier, setModifier, setModifiers
Methods inherited from interface com.github.javaparser.ast.nodeTypes.NodeWithRange
containsWithin, containsWithinRange, getBegin, getEnd, hasRange
Methods inherited from interface com.github.javaparser.ast.nodeTypes.NodeWithSimpleName
getNameAsExpression, getNameAsString, setName
Methods inherited from interface com.github.javaparser.ast.nodeTypes.NodeWithType
getTypeAsString, setType, setType, tryAddImportToParentCompilationUnit
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Field Details
-
modifiers
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name
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Constructor Details
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TypePatternExpr
public TypePatternExpr() -
TypePatternExpr
-
TypePatternExpr
public TypePatternExpr(TokenRange tokenRange, NodeList<Modifier> modifiers, Type type, SimpleName name) This constructor is used by the parser and is considered private.
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Method Details
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accept
Description copied from interface:Visitable
Accept method for visitor support.- Specified by:
accept
in interfaceVisitable
- Type Parameters:
R
- the type of the return value of the visitorA
- the type the user argument passed to the visitor- Parameters:
v
- the visitor implementationarg
- the argument passed to the visitor (of type A)- Returns:
- the result of the visit (of type R)
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accept
Description copied from interface:Visitable
Accept method for visitor support. -
getName
- Specified by:
getName
in interfaceNodeWithSimpleName<TypePatternExpr>
-
setName
- Specified by:
setName
in interfaceNodeWithSimpleName<TypePatternExpr>
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replace
- Overrides:
replace
in classPatternExpr
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clone
- Overrides:
clone
in classPatternExpr
-
getMetaModel
- Overrides:
getMetaModel
in classPatternExpr
- Returns:
- get JavaParser specific node introspection information.
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getModifiers
Description copied from interface:NodeWithModifiers
Return the modifiers of this variable declaration. Warning: modifying the returned set will not trigger observers, you have to use setModifiers for that.- Specified by:
getModifiers
in interfaceNodeWithModifiers<TypePatternExpr>
- Returns:
- modifiers
- See Also:
-
setModifiers
- Specified by:
setModifiers
in interfaceNodeWithModifiers<TypePatternExpr>
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remove
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isTypePatternExpr
public boolean isTypePatternExpr()- Overrides:
isTypePatternExpr
in classExpression
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asTypePatternExpr
- Overrides:
asTypePatternExpr
in classExpression
-
toTypePatternExpr
- Overrides:
toTypePatternExpr
in classExpression
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ifTypePatternExpr
- Overrides:
ifTypePatternExpr
in classExpression
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