Class AnnotationFieldReferenceFinder

java.lang.Object

org.sonar.plugins.java.api.tree.BaseTreeVisitor

org.sonar.java.checks.unused.utils.AnnotationFieldReferenceFinder

All Implemented Interfaces:

TreeVisitor

public class AnnotationFieldReferenceFinder
extends BaseTreeVisitor

Finds usages of fields inside annotations. I.e. currently it is used in UnusedPrivateFieldCheck to determine whether a field that is not used anywhere in the traditional sense may actually be used inside a testing annotation.

E.g.

invalid input: '{@code
// This field is used in the @FieldSource annotation below.
private static final List<Integer> field = List.of(1, 2, 3);

@ParameterizedTest
@FieldSource("field")
void test(int input) {
  // ...
}
</pre>'

Method Summary

Modifier and Type	Method	Description
Collection<VariableTree>	fieldsNotReferencedInAnnotation()	Returns the variable trees of all fields that have not been referenced by an annotation.
static AnnotationFieldReferenceFinder	findReferencesTo(Collection<VariableTree> fields)	Constructs an instance of this visitor that looks for references of the given fields inside annotations.
void	visitAnnotation(AnnotationTree annotationTree)
void	visitClass(ClassTree tree)

Methods inherited from class BaseTreeVisitor

scan, scan, scan, visitArrayAccessExpression, visitArrayDimension, visitArrayType, visitAssertStatement, visitAssignmentExpression, visitBinaryExpression, visitBlock, visitBreakStatement, visitCaseGroup, visitCaseLabel, visitCatch, visitCompilationUnit, visitConditionalExpression, visitContinueStatement, visitDefaultPattern, visitDoWhileStatement, visitEmptyStatement, visitEnumConstant, visitExportsDirectiveTree, visitExpressionStatement, visitForEachStatement, visitForStatement, visitGuardedPattern, visitIdentifier, visitIfStatement, visitImport, visitInstanceOf, visitLabeledStatement, visitLambdaExpression, visitLiteral, visitMemberSelectExpression, visitMethod, visitMethodInvocation, visitMethodReference, visitModifier, visitModule, visitNewArray, visitNewClass, visitNullPattern, visitOpensDirective, visitOther, visitPackage, visitParameterizedType, visitParenthesized, visitPatternInstanceOf, visitPrimitiveType, visitProvidesDirective, visitRecordPattern, visitRequiresDirectiveTree, visitReturnStatement, visitSwitchExpression, visitSwitchStatement, visitSynchronizedStatement, visitThrowStatement, visitTryStatement, visitTypeArguments, visitTypeCast, visitTypeParameter, visitTypeParameters, visitTypePattern, visitUnaryExpression, visitUnionType, visitUsesDirective, visitVariable, visitVarType, visitWhileStatement, visitWildcard, visitYieldStatement

Methods inherited from class Object

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

Method Details

findReferencesTo

public static AnnotationFieldReferenceFinder findReferencesTo(Collection<VariableTree> fields)

Constructs an instance of this visitor that looks for references of the given fields inside annotations.

fieldsNotReferencedInAnnotation

public Collection<VariableTree> fieldsNotReferencedInAnnotation()

Returns the variable trees of all fields that have not been referenced by an annotation. This method must be called after visiting the class tree of the fields given to findReferencesTo(Collection).

visitAnnotation

public void visitAnnotation(AnnotationTree annotationTree)

Specified by:

visitAnnotation in interface TreeVisitor

Overrides:

visitAnnotation in class BaseTreeVisitor

visitClass

public void visitClass(ClassTree tree)

Specified by:

visitClass in interface TreeVisitor

Overrides:

visitClass in class BaseTreeVisitor