Package com.github.javaparser.ast.expr

Class MethodReferenceExpr

java.lang.Object

com.github.javaparser.ast.Node

com.github.javaparser.ast.expr.Expression

com.github.javaparser.ast.expr.MethodReferenceExpr

All Implemented Interfaces:

NodeWithIdentifier<MethodReferenceExpr>, NodeWithRange<Node>, NodeWithTokenRange<Node>, NodeWithTypeArguments<MethodReferenceExpr>, Observable, Visitable, HasParentNode<Node>, Resolvable<ResolvedMethodDeclaration>, Cloneable

public class MethodReferenceExpr
extends Expression
implements NodeWithTypeArguments<MethodReferenceExpr>, NodeWithIdentifier<MethodReferenceExpr>, Resolvable<ResolvedMethodDeclaration>

Method reference expressions introduced in Java 8 specifically designed to simplify lambda Expressions. Note that the field "identifier", indicating the word to the right of the ::, is not always a method name, it can be "new".
In System.out::println; the scope is System.out and the identifier is "println"
(test ? stream.map(String::trim) : stream)::toArray;
In Bar<String>::<Integer>new the String type argument is on the scope, and the Integer type argument is on this MethodReferenceExpr.

Author:

Raquel Pau

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

Field Summary

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

Constructor Summary

Constructors

Constructor	Description
MethodReferenceExpr()
MethodReferenceExpr(Expression scope, NodeList<Type> typeArguments, String identifier)
MethodReferenceExpr(TokenRange tokenRange, Expression scope, NodeList<Type> typeArguments, String identifier)	This constructor is used by the parser and is considered private.

Method Summary

Modifier and Type	Method	Description
<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.
MethodReferenceExpr	asMethodReferenceExpr()
MethodReferenceExpr	clone()
String	getIdentifier()
MethodReferenceExprMetaModel	getMetaModel()
Expression	getScope()
Optional<NodeList<Type>>	getTypeArguments()
void	ifMethodReferenceExpr(Consumer<MethodReferenceExpr> action)
boolean	isMethodReferenceExpr()
boolean	isPolyExpression()	See https://docs.oracle.com/javase/specs/jls/se8/html/jls-15.html#jls-15.2
boolean	remove(Node node)
boolean	replace(Node node, Node replacementNode)
ResolvedMethodDeclaration	resolve()
MethodReferenceExpr	setIdentifier(String identifier)
MethodReferenceExpr	setScope(Expression scope)
MethodReferenceExpr	setTypeArguments(NodeList<Type> typeArguments)	Sets the typeArguments
Optional<MethodReferenceExpr>	toMethodReferenceExpr()

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, asNameExpr, asNormalAnnotationExpr, asNullLiteralExpr, asObjectCreationExpr, asPatternExpr, 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, ifNameExpr, ifNormalAnnotationExpr, ifNullLiteralExpr, ifObjectCreationExpr, ifPatternExpr, 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, isNameExpr, isNormalAnnotationExpr, isNullLiteralExpr, isObjectCreationExpr, isPatternExpr, isQualified, 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, toNameExpr, toNormalAnnotationExpr, toNullLiteralExpr, toObjectCreationExpr, toPatternExpr, 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, findCompilationUnit, 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, hasParentNode, isDescendantOf

Methods inherited from interface com.github.javaparser.ast.nodeTypes.NodeWithIdentifier

getId, setId

Methods inherited from interface com.github.javaparser.ast.nodeTypes.NodeWithRange

containsWithin, containsWithinRange, getBegin, getEnd, hasRange

Methods inherited from interface com.github.javaparser.ast.nodeTypes.NodeWithTypeArguments

isUsingDiamondOperator, removeTypeArguments, setDiamondOperator, setTypeArguments

Constructor Details

MethodReferenceExpr

public MethodReferenceExpr()

MethodReferenceExpr

public MethodReferenceExpr(Expression scope,
 NodeList<Type> typeArguments,
 String identifier)

MethodReferenceExpr

public MethodReferenceExpr(TokenRange tokenRange,
 Expression scope,
 NodeList<Type> typeArguments,
 String identifier)

This constructor is used by the parser and is considered private.

Method Details

accept

public <R,
A> R accept(GenericVisitor<R,A> v,
 A arg)

Description copied from interface: Visitable

Accept method for visitor support.

Specified by:

accept in interface Visitable

Type Parameters:

R - the type of the return value of the visitor

A - the type the user argument passed to the visitor

Parameters:

v - the visitor implementation

arg - the argument passed to the visitor (of type A)

Returns:

the result of the visit (of type R)

accept

public <A> void accept(VoidVisitor<A> v,
 A arg)

Description copied from interface: Visitable

Accept method for visitor support.

Specified by:

accept in interface Visitable

Type Parameters:

A - the type the argument passed for the visitor

Parameters:

v - the visitor implementation

arg - any value relevant for the visitor (of type A)

getScope

public Expression getScope()

setScope

public MethodReferenceExpr setScope(Expression scope)

getTypeArguments

public Optional<NodeList<Type>> getTypeArguments()

Specified by:

getTypeArguments in interface NodeWithTypeArguments<MethodReferenceExpr>

Returns:

the types that can be found in the type arguments: <String, Integer>.

setTypeArguments

public MethodReferenceExpr setTypeArguments(NodeList<Type> typeArguments)

Sets the typeArguments

Specified by:

setTypeArguments in interface NodeWithTypeArguments<MethodReferenceExpr>

Parameters:

typeArguments - the typeArguments, can be null

Returns:

this, the MethodReferenceExpr

getIdentifier

public String getIdentifier()

Specified by:

getIdentifier in interface NodeWithIdentifier<MethodReferenceExpr>

setIdentifier

public MethodReferenceExpr setIdentifier(String identifier)

Specified by:

setIdentifier in interface NodeWithIdentifier<MethodReferenceExpr>

remove

public boolean remove(Node node)

Overrides:

remove in class Node

clone

public MethodReferenceExpr clone()

Overrides:

clone in class Expression

getMetaModel

public MethodReferenceExprMetaModel getMetaModel()

Overrides:

getMetaModel in class Expression

Returns:

get JavaParser specific node introspection information.

replace

public boolean replace(Node node,
 Node replacementNode)

Overrides:

replace in class Node

isMethodReferenceExpr

public boolean isMethodReferenceExpr()

Overrides:

isMethodReferenceExpr in class Expression

asMethodReferenceExpr

public MethodReferenceExpr asMethodReferenceExpr()

Overrides:

asMethodReferenceExpr in class Expression

ifMethodReferenceExpr

public void ifMethodReferenceExpr(Consumer<MethodReferenceExpr> action)

Overrides:

ifMethodReferenceExpr in class Expression

toMethodReferenceExpr

public Optional<MethodReferenceExpr> toMethodReferenceExpr()

Overrides:

toMethodReferenceExpr in class Expression

resolve

public ResolvedMethodDeclaration resolve()

Specified by:

resolve in interface Resolvable<ResolvedMethodDeclaration>

Returns:

the method declaration this method reference is referencing.

isPolyExpression

public boolean isPolyExpression()

Description copied from class: Expression

See https://docs.oracle.com/javase/specs/jls/se8/html/jls-15.html#jls-15.2

Overrides:

isPolyExpression in class Expression

Returns:

true if the expression is a poly expression