Class ObjectToString

java.lang.Object

com.google.errorprone.bugpatterns.BugChecker

com.google.errorprone.bugpatterns.AbstractToString

com.google.errorprone.bugpatterns.ObjectToString

All Implemented Interfaces:

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

public class ObjectToString
extends AbstractToString

Warns against calling toString() on Objects which don't have toString() method overridden and won't produce meaningful output.

Author:

bhagwani@google.com (Sumit Bhagwani)

See Also:

• Serialized Form

Nested Class Summary

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

BugChecker.AnnotatedTypeTreeMatcher, BugChecker.AnnotationTreeMatcher, BugChecker.ArrayAccessTreeMatcher, BugChecker.ArrayTypeTreeMatcher, BugChecker.AssertTreeMatcher, BugChecker.AssignmentTreeMatcher, BugChecker.BinaryTreeMatcher, 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.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.NewArrayTreeMatcher, BugChecker.NewClassTreeMatcher, BugChecker.ParameterizedTypeTreeMatcher, BugChecker.ParenthesizedTreeMatcher, BugChecker.PrimitiveTypeTreeMatcher, BugChecker.ReturnTreeMatcher, BugChecker.SuppressibleTreePathScanner<R,P>, BugChecker.SwitchTreeMatcher, BugChecker.SynchronizedTreeMatcher, BugChecker.ThrowTreeMatcher, BugChecker.TryTreeMatcher, BugChecker.TypeCastTreeMatcher, BugChecker.TypeParameterTreeMatcher, BugChecker.UnaryTreeMatcher, BugChecker.UnionTypeTreeMatcher, BugChecker.VariableTreeMatcher, BugChecker.WhileLoopTreeMatcher, BugChecker.WildcardTreeMatcher

Method Summary

Modifier and Type	Method	Description
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 Optional<Fix>	implicitToStringFix(com.sun.source.tree.ExpressionTree tree, VisitorState state)	Constructs a fix for an implicit toString call, e.g.
protected Optional<Fix>	toStringFix(com.sun.source.tree.Tree parent, com.sun.source.tree.ExpressionTree tree, VisitorState state)	Constructs a fix for an explicit toString call, e.g.
protected TypePredicate	typePredicate()	The type to match on.

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

allowableToStringKind, matchBinary, matchCompoundAssignment, matchMethodInvocation

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

Method Details

typePredicate

protected TypePredicate typePredicate()

Description copied from class: AbstractToString

The type to match on.

Specified by:

typePredicate in class AbstractToString

descriptionMessageForDefaultMatch

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

Description copied from class: AbstractToString

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

Overrides:

descriptionMessageForDefaultMatch in class AbstractToString

implicitToStringFix

protected Optional<Fix> implicitToStringFix(com.sun.source.tree.ExpressionTree tree,
 VisitorState state)

Description copied from class: AbstractToString

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

Specified by:

implicitToStringFix in class AbstractToString

Parameters:

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

toStringFix

protected Optional<Fix> toStringFix(com.sun.source.tree.Tree parent,
 com.sun.source.tree.ExpressionTree tree,
 VisitorState state)

Description copied from class: AbstractToString

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

Specified by:

toStringFix in class AbstractToString

Parameters:

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