Class AbstractToString

java.lang.Object

com.google.errorprone.bugpatterns.BugChecker

com.google.errorprone.bugpatterns.AbstractToString

All Implemented Interfaces:

BugChecker.BinaryTreeMatcher, BugChecker.CompoundAssignmentTreeMatcher, BugChecker.MethodInvocationTreeMatcher, Suppressible, Serializable

Direct Known Subclasses:

AnnotationMirrorToString, AnnotationValueToString, ArrayToString, LiteProtoToString, ObjectToString, StreamToString, SymbolToString, TreeToString, TypeToString

public abstract class AbstractToString
extends BugChecker
implements BugChecker.BinaryTreeMatcher, BugChecker.MethodInvocationTreeMatcher, BugChecker.CompoundAssignmentTreeMatcher

An abstract matcher for implicit and explicit calls to Object.toString(), for use on types that do not have a human-readable toString() implementation.

See examples in StreamToString and ArrayToString.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class BugChecker

BugChecker.AnnotatedTypeTreeMatcher, BugChecker.AnnotationTreeMatcher, BugChecker.ArrayAccessTreeMatcher, BugChecker.ArrayTypeTreeMatcher, BugChecker.AssertTreeMatcher, BugChecker.AssignmentTreeMatcher, BugChecker.BinaryTreeMatcher, BugChecker.BindingPatternTreeMatcher, BugChecker.BlockTreeMatcher, BugChecker.BreakTreeMatcher, BugChecker.CaseTreeMatcher, BugChecker.CatchTreeMatcher, BugChecker.ClassTreeMatcher, BugChecker.CompilationUnitTreeMatcher, BugChecker.CompoundAssignmentTreeMatcher, BugChecker.ConditionalExpressionTreeMatcher, BugChecker.ContinueTreeMatcher, BugChecker.DoWhileLoopTreeMatcher, BugChecker.EmptyStatementTreeMatcher, BugChecker.EnhancedForLoopTreeMatcher, BugChecker.ExportsTreeMatcher, BugChecker.ExpressionStatementTreeMatcher, BugChecker.ForLoopTreeMatcher, BugChecker.IdentifierTreeMatcher, BugChecker.IfTreeMatcher, BugChecker.ImportTreeMatcher, BugChecker.InstanceOfTreeMatcher, BugChecker.IntersectionTypeTreeMatcher, BugChecker.LabeledStatementTreeMatcher, BugChecker.LambdaExpressionTreeMatcher, BugChecker.LiteralTreeMatcher, BugChecker.MemberReferenceTreeMatcher, BugChecker.MemberSelectTreeMatcher, BugChecker.MethodInvocationTreeMatcher, BugChecker.MethodTreeMatcher, BugChecker.ModifiersTreeMatcher, BugChecker.ModuleTreeMatcher, BugChecker.NewArrayTreeMatcher, BugChecker.NewClassTreeMatcher, BugChecker.OpensTreeMatcher, BugChecker.PackageTreeMatcher, BugChecker.ParameterizedTypeTreeMatcher, BugChecker.ParenthesizedTreeMatcher, BugChecker.PrimitiveTypeTreeMatcher, BugChecker.ProvidesTreeMatcher, BugChecker.RequiresTreeMatcher, BugChecker.ReturnTreeMatcher, BugChecker.SuppressibleTreePathScanner<R,P>, BugChecker.SwitchExpressionTreeMatcher, BugChecker.SwitchTreeMatcher, BugChecker.SynchronizedTreeMatcher, BugChecker.ThrowTreeMatcher, BugChecker.TryTreeMatcher, BugChecker.TypeCastTreeMatcher, BugChecker.TypeParameterTreeMatcher, BugChecker.UnaryTreeMatcher, BugChecker.UnionTypeTreeMatcher, BugChecker.UsesTreeMatcher, BugChecker.VariableTreeMatcher, BugChecker.WhileLoopTreeMatcher, BugChecker.WildcardTreeMatcher, BugChecker.YieldTreeMatcher

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractToString(ErrorProneFlags flags)

Method Summary

Modifier and Type	Method	Description
protected boolean	allowableToStringKind(com.google.errorprone.bugpatterns.AbstractToString.ToStringKind toStringKind)	Whether this kind of toString call is allowable for this check.
protected Optional<String>	descriptionMessageForDefaultMatch(com.sun.tools.javac.code.Type type, VisitorState state)	Adds the description message for match on the type without fixes.
protected abstract Optional<Fix>	implicitToStringFix(ExpressionTree tree, VisitorState state)	Constructs a fix for an implicit toString call, e.g. from string concatenation or from passing an argument to println or StringBuilder.append.
Description	matchBinary(BinaryTree tree, VisitorState state)
Description	matchCompoundAssignment(CompoundAssignmentTree tree, VisitorState state)
Description	matchMethodInvocation(MethodInvocationTree tree, VisitorState state)
protected abstract Optional<Fix>	toStringFix(Tree parent, ExpressionTree expression, VisitorState state)	Constructs a fix for an explicit toString call, e.g. from Object.toString() or String.valueOf().
protected abstract TypePredicate	typePredicate()	The type to match on.

Methods inherited from class 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 Object

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

Methods inherited from interface Suppressible

allNames, canonicalName, customSuppressionAnnotations, supportsSuppressWarnings, suppressedByAnyOf

Constructor Details

AbstractToString

protected AbstractToString(ErrorProneFlags flags)

Method Details

typePredicate

protected abstract TypePredicate typePredicate()

The type to match on.

implicitToStringFix

protected abstract Optional<Fix> implicitToStringFix(ExpressionTree tree,
 VisitorState state)

Constructs a fix for an implicit toString call, e.g. from string concatenation or from passing an argument to println or StringBuilder.append.

Parameters:

tree - the tree node for the expression being converted to a String

descriptionMessageForDefaultMatch

protected Optional<String> descriptionMessageForDefaultMatch(com.sun.tools.javac.code.Type type,
 VisitorState state)

Adds the description message for match on the type without fixes.

allowableToStringKind

protected boolean allowableToStringKind(com.google.errorprone.bugpatterns.AbstractToString.ToStringKind toStringKind)

Whether this kind of toString call is allowable for this check.

toStringFix

protected abstract Optional<Fix> toStringFix(Tree parent,
 ExpressionTree expression,
 VisitorState state)

Constructs a fix for an explicit toString call, e.g. from Object.toString() or String.valueOf().

Parameters:

parent - the expression's parent (e.g. String.valueOf(expression))

matchMethodInvocation

public Description matchMethodInvocation(MethodInvocationTree tree,
 VisitorState state)

Specified by:

matchMethodInvocation in interface BugChecker.MethodInvocationTreeMatcher

matchBinary

public Description matchBinary(BinaryTree tree,
 VisitorState state)

Specified by:

matchBinary in interface BugChecker.BinaryTreeMatcher

matchCompoundAssignment

public Description matchCompoundAssignment(CompoundAssignmentTree tree,
 VisitorState state)

Specified by:

matchCompoundAssignment in interface BugChecker.CompoundAssignmentTreeMatcher