Package tech.picnic.errorprone.bugpatterns

Class CollectorMutability

java.lang.Object

com.google.errorprone.bugpatterns.BugChecker

tech.picnic.errorprone.bugpatterns.CollectorMutability

All Implemented Interfaces:

com.google.errorprone.bugpatterns.BugChecker.MethodInvocationTreeMatcher, com.google.errorprone.matchers.Suppressible, Serializable

@AutoService(com.google.errorprone.bugpatterns.BugChecker.class)
public final class CollectorMutability
extends com.google.errorprone.bugpatterns.BugChecker
implements com.google.errorprone.bugpatterns.BugChecker.MethodInvocationTreeMatcher

A BugChecker that flags Collectors that don't clearly express (im)mutability.

Replacing such collectors with alternatives that produce immutable collections is preferred. Do note that Guava's immutable collections are null-hostile.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.google.errorprone.bugpatterns.BugChecker

com.google.errorprone.bugpatterns.BugChecker.AnnotatedTypeTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.AnnotationTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ArrayAccessTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ArrayTypeTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.AssertTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.AssignmentTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.BinaryTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.BlockTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.BreakTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.CaseTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.CatchTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ClassTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.CompilationUnitTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.CompoundAssignmentTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ConditionalExpressionTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ContinueTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.DoWhileLoopTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.EmptyStatementTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.EnhancedForLoopTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ExpressionStatementTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ForLoopTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.IdentifierTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.IfTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ImportTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.InstanceOfTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.IntersectionTypeTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.LabeledStatementTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.LambdaExpressionTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.LiteralTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.MemberReferenceTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.MemberSelectTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.MethodInvocationTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.MethodTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ModifiersTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.NewArrayTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.NewClassTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ParameterizedTypeTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ParenthesizedTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.PrimitiveTypeTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ReturnTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.SuppressibleTreePathScanner<A extends Object,B extends Object>, com.google.errorprone.bugpatterns.BugChecker.SwitchTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.SynchronizedTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.ThrowTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.TryTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.TypeCastTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.TypeParameterTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.UnaryTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.UnionTypeTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.VariableTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.WhileLoopTreeMatcher, com.google.errorprone.bugpatterns.BugChecker.WildcardTreeMatcher

Constructor Summary

Constructors

Constructor	Description
CollectorMutability()	Instantiates a new CollectorMutability instance.

Method Summary

Modifier and Type	Method	Description
com.google.errorprone.matchers.Description	matchMethodInvocation(MethodInvocationTree tree, com.google.errorprone.VisitorState state)

Methods inherited from class com.google.errorprone.bugpatterns.BugChecker

allNames, buildDescription, buildDescription, buildDescription, canonicalName, customSuppressionAnnotations, defaultSeverity, describeMatch, describeMatch, describeMatch, describeMatch, describeMatch, describeMatch, disableable, equals, hashCode, isSuppressed, isSuppressed, isSuppressed, isSuppressed, linkUrl, message, supportsSuppressWarnings, suppressedByAnyOf, suppressedRegions

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.errorprone.matchers.Suppressible

allNames, canonicalName, customSuppressionAnnotations, supportsSuppressWarnings, suppressedByAnyOf

Constructor Details

CollectorMutability

public CollectorMutability()

Instantiates a new CollectorMutability instance.

Method Details

matchMethodInvocation

public com.google.errorprone.matchers.Description matchMethodInvocation(MethodInvocationTree tree,
 com.google.errorprone.VisitorState state)

Specified by:

matchMethodInvocation in interface com.google.errorprone.bugpatterns.BugChecker.MethodInvocationTreeMatcher