Class TreeScanner<R,P>

java.lang.Object

com.sun.source.util.TreeScanner<R,P>

Type Parameters:: R - the return type of this visitor's methods. Use Void for visitors that do not need to return results.; P - the type of the additional parameter to this visitor's methods. Use Void for visitors that do not need an additional parameter.

All Implemented Interfaces:: TreeVisitor<R,P>

Direct Known Subclasses:: TreePathScanner

public class TreeScanner<R,P> extends Object implements TreeVisitor<R,P>

TreeScanner relies on preview features of the Java platform:

TreeScanner refers to one or more reflective preview APIs: DefaultCaseLabelTree, GuardedPatternTree, ParenthesizedPatternTree.

Programs can only use TreeScanner when preview features are enabled.

Preview features may be removed in a future release, or upgraded to permanent features of the Java platform.

A TreeVisitor that visits all the child tree nodes. To visit nodes of a particular type, just override the corresponding visitXYZ method. Inside your method, call super.visitXYZ to visit descendant nodes.

Here is an example to count the number of identifier nodes in a tree:

   class CountIdentifiers extends TreeScanner<Integer,Void> {
      @Override
      public Integer visitIdentifier(IdentifierTree node, Void p) {
          return 1;
      }
      @Override
      public Integer reduce(Integer r1, Integer r2) {
          return (r1 == null ? 0 : r1) + (r2 == null ? 0 : r2);
      }
   }

Implementation Requirements:

The default implementation of the visitXYZ methods will determine a result as follows:

If the node being visited has no children, the result will be null.
If the node being visited has one child, the result will be the result of calling scan with that child. The child may be a simple node or itself a list of nodes.
If the node being visited has more than one child, the result will be determined by calling scan with each child in turn, and then combining the result of each scan after the first with the cumulative result so far, as determined by the reduce(R, R) method. Each child may be either a simple node or a list of nodes. The default behavior of the reduce method is such that the result of the visitXYZ method will be the result of the last child scanned.

Since:

1.6

Constructor Summary

Constructor	Description
`TreeScanner()`	Constructs a `TreeScanner`.

Method Summary

Modifier and Type	Method	Description
`R`	`reduce(R r1, R r2)`	Reduces two results into a combined result.
`R`	`scan(Tree tree, P p)`	Scans a single node.
`R`	`scan(Iterable<? extends Tree> nodes, P p)`	Scans a sequence of nodes.
`R`	`visitAnnotatedType(AnnotatedTypeTree node, P p)`	Visits an AnnotatedTypeTree node.
`R`	`visitAnnotation(AnnotationTree node, P p)`	Visits an AnnotatedTree node.
`R`	`visitArrayAccess(ArrayAccessTree node, P p)`	Visits an ArrayAccessTree node.
`R`	`visitArrayType(ArrayTypeTree node, P p)`	Visits an ArrayTypeTree node.
`R`	`visitAssert(AssertTree node, P p)`	Visits an AssertTree node.
`R`	`visitAssignment(AssignmentTree node, P p)`	Visits an AssignmentTree node.
`R`	`visitBinary(BinaryTree node, P p)`	Visits a BinaryTree node.
`R`	`visitBindingPattern(BindingPatternTree node, P p)`	Visits an BindingPattern node.
`R`	`visitBlock(BlockTree node, P p)`	Visits a BlockTree node.
`R`	`visitBreak(BreakTree node, P p)`	Visits a BreakTree node.
`R`	`visitCase(CaseTree node, P p)`	Visits a CaseTree node.
`R`	`visitCatch(CatchTree node, P p)`	Visits a CatchTree node.
`R`	`visitClass(ClassTree node, P p)`	Visits a ClassTree node.
`R`	`visitCompilationUnit(CompilationUnitTree node, P p)`	Visits a CompilationUnitTree node.
`R`	`visitCompoundAssignment(CompoundAssignmentTree node, P p)`	Visits a CompoundAssignmentTree node.
`R`	`visitConditionalExpression(ConditionalExpressionTree node, P p)`	Visits a ConditionalExpressionTree node.
`R`	`visitContinue(ContinueTree node, P p)`	Visits a ContinueTree node.
`R`	`visitDefaultCaseLabel(DefaultCaseLabelTree^PREVIEW node, P p)`	Preview. Visits a DefaultCaseLabelTree node.
`R`	`visitDoWhileLoop(DoWhileLoopTree node, P p)`	Visits a DoWhileTree node.
`R`	`visitEmptyStatement(EmptyStatementTree node, P p)`	Visits an EmptyStatementTree node.
`R`	`visitEnhancedForLoop(EnhancedForLoopTree node, P p)`	Visits an EnhancedForLoopTree node.
`R`	`visitErroneous(ErroneousTree node, P p)`	Visits an ErroneousTree node.
`R`	`visitExports(ExportsTree node, P p)`	Visits an ExportsTree node.
`R`	`visitExpressionStatement(ExpressionStatementTree node, P p)`	Visits an ExpressionStatementTree node.
`R`	`visitForLoop(ForLoopTree node, P p)`	Visits a ForLoopTree node.
`R`	`visitGuardedPattern(GuardedPatternTree^PREVIEW node, P p)`	Preview. Visits a GuardPatternTree node.
`R`	`visitIdentifier(IdentifierTree node, P p)`	Visits an IdentifierTree node.
`R`	`visitIf(IfTree node, P p)`	Visits an IfTree node.
`R`	`visitImport(ImportTree node, P p)`	Visits an ImportTree node.
`R`	`visitInstanceOf(InstanceOfTree node, P p)`	Visits an InstanceOfTree node.
`R`	`visitIntersectionType(IntersectionTypeTree node, P p)`	Visits an IntersectionTypeTree node.
`R`	`visitLabeledStatement(LabeledStatementTree node, P p)`	Visits a LabeledStatementTree node.
`R`	`visitLambdaExpression(LambdaExpressionTree node, P p)`	Visits a LambdaExpressionTree node.
`R`	`visitLiteral(LiteralTree node, P p)`	Visits a LiteralTree node.
`R`	`visitMemberReference(MemberReferenceTree node, P p)`	Visits a MemberReferenceTree node.
`R`	`visitMemberSelect(MemberSelectTree node, P p)`	Visits a MemberSelectTree node.
`R`	`visitMethod(MethodTree node, P p)`	Visits a MethodTree node.
`R`	`visitMethodInvocation(MethodInvocationTree node, P p)`	Visits a MethodInvocationTree node.
`R`	`visitModifiers(ModifiersTree node, P p)`	Visits a ModifiersTree node.
`R`	`visitModule(ModuleTree node, P p)`	Visits a ModuleTree node.
`R`	`visitNewArray(NewArrayTree node, P p)`	Visits a NewArrayTree node.
`R`	`visitNewClass(NewClassTree node, P p)`	Visits a NewClassTree node.
`R`	`visitOpens(OpensTree node, P p)`	Visits an OpensTree node.
`R`	`visitOther(Tree node, P p)`	Visits an unknown type of Tree node.
`R`	`visitPackage(PackageTree node, P p)`	Visits a PackageTree node.
`R`	`visitParameterizedType(ParameterizedTypeTree node, P p)`	Visits a ParameterizedTypeTree node.
`R`	`visitParenthesized(ParenthesizedTree node, P p)`	Visits a ParenthesizedTree node.
`R`	`visitParenthesizedPattern(ParenthesizedPatternTree^PREVIEW node, P p)`	Preview. Visits a ParenthesizedPatternTree node.
`R`	`visitPrimitiveType(PrimitiveTypeTree node, P p)`	Visits a PrimitiveTypeTree node.
`R`	`visitProvides(ProvidesTree node, P p)`	Visits a ProvidesTree node.
`R`	`visitRequires(RequiresTree node, P p)`	Visits a RequiresTree node.
`R`	`visitReturn(ReturnTree node, P p)`	Visits a ReturnTree node.
`R`	`visitSwitch(SwitchTree node, P p)`	Visits a SwitchTree node.
`R`	`visitSwitchExpression(SwitchExpressionTree node, P p)`	Visits a SwitchExpressionTree node.
`R`	`visitSynchronized(SynchronizedTree node, P p)`	Visits a SynchronizedTree node.
`R`	`visitThrow(ThrowTree node, P p)`	Visits a ThrowTree node.
`R`	`visitTry(TryTree node, P p)`	Visits a TryTree node.
`R`	`visitTypeCast(TypeCastTree node, P p)`	Visits a TypeCastTree node.
`R`	`visitTypeParameter(TypeParameterTree node, P p)`	Visits a TypeParameterTree node.
`R`	`visitUnary(UnaryTree node, P p)`	Visits a UnaryTree node.
`R`	`visitUnionType(UnionTypeTree node, P p)`	Visits a UnionTypeTree node.
`R`	`visitUses(UsesTree node, P p)`	Visits a UsesTree node.
`R`	`visitVariable(VariableTree node, P p)`	Visits a VariableTree node.
`R`	`visitWhileLoop(WhileLoopTree node, P p)`	Visits a WhileLoopTree node.
`R`	`visitWildcard(WildcardTree node, P p)`	Visits a WildcardTypeTree node.
`R`	`visitYield(YieldTree node, P p)`	Visits a YieldTree node.

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

TreeScanner

public TreeScanner()

Constructs a TreeScanner.

Method Details

scan

public R scan(Tree tree, P p)

Scans a single node.

Parameters:: tree - the node to be scanned; p - a parameter value passed to the visit method
Returns:: the result value from the visit method

scan

public R scan(Iterable<? extends Tree> nodes, P p)

Scans a sequence of nodes.

Parameters:: nodes - the nodes to be scanned; p - a parameter value to be passed to the visit method for each node
Returns:: the combined return value from the visit methods. The values are combined using the reduce method.

reduce

public R reduce(R r1, R r2)

Reduces two results into a combined result. The default implementation is to return the first parameter. The general contract of the method is that it may take any action whatsoever.

Parameters:: r1 - the first of the values to be combined; r2 - the second of the values to be combined
Returns:: the result of combining the two parameters

visitCompilationUnit

public R visitCompilationUnit(CompilationUnitTree node, P p)

Visits a CompilationUnitTree node.

Specified by:: visitCompilationUnit in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitPackage

public R visitPackage(PackageTree node, P p)

Visits a PackageTree node.

Specified by:: visitPackage in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitImport

public R visitImport(ImportTree node, P p)

Visits an ImportTree node.

Specified by:: visitImport in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitClass

public R visitClass(ClassTree node, P p)

Visits a ClassTree node.

Specified by:: visitClass in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitMethod

public R visitMethod(MethodTree node, P p)

Visits a MethodTree node.

Specified by:: visitMethod in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitVariable

public R visitVariable(VariableTree node, P p)

Visits a VariableTree node.

Specified by:: visitVariable in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitEmptyStatement

public R visitEmptyStatement(EmptyStatementTree node, P p)

Visits an EmptyStatementTree node.

Specified by:: visitEmptyStatement in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation returns null.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitBlock

public R visitBlock(BlockTree node, P p)

Visits a BlockTree node.

Specified by:: visitBlock in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitDoWhileLoop

public R visitDoWhileLoop(DoWhileLoopTree node, P p)

Visits a DoWhileTree node.

Specified by:: visitDoWhileLoop in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitWhileLoop

public R visitWhileLoop(WhileLoopTree node, P p)

Visits a WhileLoopTree node.

Specified by:: visitWhileLoop in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitForLoop

public R visitForLoop(ForLoopTree node, P p)

Visits a ForLoopTree node.

Specified by:: visitForLoop in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitEnhancedForLoop

public R visitEnhancedForLoop(EnhancedForLoopTree node, P p)

Visits an EnhancedForLoopTree node.

Specified by:: visitEnhancedForLoop in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitLabeledStatement

public R visitLabeledStatement(LabeledStatementTree node, P p)

Visits a LabeledStatementTree node.

Specified by:: visitLabeledStatement in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitSwitch

public R visitSwitch(SwitchTree node, P p)

Visits a SwitchTree node.

Specified by:: visitSwitch in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitSwitchExpression

public R visitSwitchExpression(SwitchExpressionTree node, P p)

Visits a SwitchExpressionTree node.

Specified by:: visitSwitchExpression in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitCase

public R visitCase(CaseTree node, P p)

Visits a CaseTree node.

Specified by:: visitCase in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitSynchronized

public R visitSynchronized(SynchronizedTree node, P p)

Visits a SynchronizedTree node.

Specified by:: visitSynchronized in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitTry

public R visitTry(TryTree node, P p)

Visits a TryTree node.

Specified by:: visitTry in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitCatch

public R visitCatch(CatchTree node, P p)

Visits a CatchTree node.

Specified by:: visitCatch in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitConditionalExpression

public R visitConditionalExpression(ConditionalExpressionTree node, P p)

Visits a ConditionalExpressionTree node.

Specified by:: visitConditionalExpression in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitIf

public R visitIf(IfTree node, P p)

Visits an IfTree node.

Specified by:: visitIf in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitExpressionStatement

public R visitExpressionStatement(ExpressionStatementTree node, P p)

Visits an ExpressionStatementTree node.

Specified by:: visitExpressionStatement in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitBreak

public R visitBreak(BreakTree node, P p)

Visits a BreakTree node.

Specified by:: visitBreak in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation returns null.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitContinue

public R visitContinue(ContinueTree node, P p)

Visits a ContinueTree node.

Specified by:: visitContinue in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation returns null.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitReturn

public R visitReturn(ReturnTree node, P p)

Visits a ReturnTree node.

Specified by:: visitReturn in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitThrow

public R visitThrow(ThrowTree node, P p)

Visits a ThrowTree node.

Specified by:: visitThrow in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitAssert

public R visitAssert(AssertTree node, P p)

Visits an AssertTree node.

Specified by:: visitAssert in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitMethodInvocation

public R visitMethodInvocation(MethodInvocationTree node, P p)

Visits a MethodInvocationTree node.

Specified by:: visitMethodInvocation in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitNewClass

public R visitNewClass(NewClassTree node, P p)

Visits a NewClassTree node.

Specified by:: visitNewClass in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitNewArray

public R visitNewArray(NewArrayTree node, P p)

Visits a NewArrayTree node.

Specified by:: visitNewArray in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitLambdaExpression

public R visitLambdaExpression(LambdaExpressionTree node, P p)

Visits a LambdaExpressionTree node.

Specified by:: visitLambdaExpression in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitParenthesized

public R visitParenthesized(ParenthesizedTree node, P p)

Visits a ParenthesizedTree node.

Specified by:: visitParenthesized in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitAssignment

public R visitAssignment(AssignmentTree node, P p)

Visits an AssignmentTree node.

Specified by:: visitAssignment in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitCompoundAssignment

public R visitCompoundAssignment(CompoundAssignmentTree node, P p)

Visits a CompoundAssignmentTree node.

Specified by:: visitCompoundAssignment in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitUnary

public R visitUnary(UnaryTree node, P p)

Visits a UnaryTree node.

Specified by:: visitUnary in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitBinary

public R visitBinary(BinaryTree node, P p)

Visits a BinaryTree node.

Specified by:: visitBinary in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitTypeCast

public R visitTypeCast(TypeCastTree node, P p)

Visits a TypeCastTree node.

Specified by:: visitTypeCast in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitInstanceOf

public R visitInstanceOf(InstanceOfTree node, P p)

Visits an InstanceOfTree node.

Specified by:: visitInstanceOf in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitBindingPattern

public R visitBindingPattern(BindingPatternTree node, P p)

Visits an BindingPattern node.

Specified by:: visitBindingPattern in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning
Since:: 14

visitDefaultCaseLabel

public R visitDefaultCaseLabel(DefaultCaseLabelTreePREVIEW node, P p)

visitDefaultCaseLabel is a reflective preview API of the Java platform.

Preview features may be removed in a future release, or upgraded to permanent features of the Java platform.

Visits a DefaultCaseLabelTree node.

Specified by:: visitDefaultCaseLabel in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation returns null.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning
Since:: 17

visitArrayAccess

public R visitArrayAccess(ArrayAccessTree node, P p)

Visits an ArrayAccessTree node.

Specified by:: visitArrayAccess in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitMemberSelect

public R visitMemberSelect(MemberSelectTree node, P p)

Visits a MemberSelectTree node.

Specified by:: visitMemberSelect in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitParenthesizedPattern

public R visitParenthesizedPattern(ParenthesizedPatternTreePREVIEW node, P p)

visitParenthesizedPattern is a reflective preview API of the Java platform.

Preview features may be removed in a future release, or upgraded to permanent features of the Java platform.

Visits a ParenthesizedPatternTree node.

Specified by:: visitParenthesizedPattern in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning
Since:: 17

visitGuardedPattern

public R visitGuardedPattern(GuardedPatternTreePREVIEW node, P p)

visitGuardedPattern is a reflective preview API of the Java platform.

Preview features may be removed in a future release, or upgraded to permanent features of the Java platform.

Visits a GuardPatternTree node.

Specified by:: visitGuardedPattern in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning
Since:: 17

visitMemberReference

public R visitMemberReference(MemberReferenceTree node, P p)

Visits a MemberReferenceTree node.

Specified by:: visitMemberReference in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitIdentifier

public R visitIdentifier(IdentifierTree node, P p)

Visits an IdentifierTree node.

Specified by:: visitIdentifier in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation returns null.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitLiteral

public R visitLiteral(LiteralTree node, P p)

Visits a LiteralTree node.

Specified by:: visitLiteral in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation returns null.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitPrimitiveType

public R visitPrimitiveType(PrimitiveTypeTree node, P p)

Visits a PrimitiveTypeTree node.

Specified by:: visitPrimitiveType in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation returns null.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitArrayType

public R visitArrayType(ArrayTypeTree node, P p)

Visits an ArrayTypeTree node.

Specified by:: visitArrayType in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitParameterizedType

public R visitParameterizedType(ParameterizedTypeTree node, P p)

Visits a ParameterizedTypeTree node.

Specified by:: visitParameterizedType in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitUnionType

public R visitUnionType(UnionTypeTree node, P p)

Visits a UnionTypeTree node.

Specified by:: visitUnionType in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitIntersectionType

public R visitIntersectionType(IntersectionTypeTree node, P p)

Visits an IntersectionTypeTree node.

Specified by:: visitIntersectionType in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitTypeParameter

public R visitTypeParameter(TypeParameterTree node, P p)

Visits a TypeParameterTree node.

Specified by:: visitTypeParameter in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitWildcard

public R visitWildcard(WildcardTree node, P p)

Visits a WildcardTypeTree node.

Specified by:: visitWildcard in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitModifiers

public R visitModifiers(ModifiersTree node, P p)

Visits a ModifiersTree node.

Specified by:: visitModifiers in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitAnnotation

public R visitAnnotation(AnnotationTree node, P p)

Visits an AnnotatedTree node.

Specified by:: visitAnnotation in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitAnnotatedType

public R visitAnnotatedType(AnnotatedTypeTree node, P p)

Visits an AnnotatedTypeTree node.

Specified by:: visitAnnotatedType in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitModule

public R visitModule(ModuleTree node, P p)

Visits a ModuleTree node.

Specified by:: visitModule in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitExports

public R visitExports(ExportsTree node, P p)

Visits an ExportsTree node.

Specified by:: visitExports in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitOpens

public R visitOpens(OpensTree node, P p)

Visits an OpensTree node.

Specified by:: visitOpens in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitProvides

public R visitProvides(ProvidesTree node, P p)

Visits a ProvidesTree node.

Specified by:: visitProvides in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitRequires

public R visitRequires(RequiresTree node, P p)

Visits a RequiresTree node.

Specified by:: visitRequires in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitUses

public R visitUses(UsesTree node, P p)

Visits a UsesTree node.

Specified by:: visitUses in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitOther

public R visitOther(Tree node, P p)

Visits an unknown type of Tree node. This can occur if the language evolves and new kinds of nodes are added to the Tree hierarchy.

Specified by:: visitOther in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation returns null.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitErroneous

public R visitErroneous(ErroneousTree node, P p)

Visits an ErroneousTree node.

Specified by:: visitErroneous in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation returns null.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

visitYield

public R visitYield(YieldTree node, P p)

Visits a YieldTree node.

Specified by:: visitYield in interface TreeVisitor<R,P>
Implementation Requirements:: This implementation scans the children in left to right order.
Parameters:: node - the node being visited; p - a parameter value
Returns:: the result of scanning

© 1993, 2021, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/17/docs/api/jdk.compiler/com/sun/source/util/TreeScanner.html