Package org.checkerframework.checker.initialization

Class InitializationVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>,Value extends CFAbstractValue<Value>,Store extends InitializationStore<Value,Store>>

java.lang.Object

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

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

org.checkerframework.framework.source.SourceVisitor<Void,Void>

org.checkerframework.common.basetype.BaseTypeVisitor<Factory>

org.checkerframework.checker.initialization.InitializationVisitor<Factory,Value,Store>

All Implemented Interfaces:

TreeVisitor<Void,Void>

Direct Known Subclasses:

NullnessVisitor

public class InitializationVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>,Value extends CFAbstractValue<Value>,Store extends InitializationStore<Value,Store>>
extends BaseTypeVisitor<Factory>

The visitor for the freedom-before-commitment type-system. The freedom-before-commitment type-system and this class are abstract and need to be combined with another type-system whose safe initialization should be tracked. For an example, see the NullnessChecker.

Nested Class Summary

Nested classes/interfaces inherited from class org.checkerframework.common.basetype.BaseTypeVisitor

BaseTypeVisitor.OverrideChecker

Field Summary

Fields

Modifier and Type	Field	Description
protected final AnnotationFormatter	annoFormatter	The annotation formatter.
protected final List<VariableTree>	initializedFields

Fields inherited from class org.checkerframework.common.basetype.BaseTypeVisitor

atypeFactory, checker, DETERMINISTIC, methodTree, positions, PURE, showchecks, SIDE_EFFECT_FREE, TARGET, targetValueElement, typeValidator, unusedWhenElement

Fields inherited from class org.checkerframework.framework.source.SourceVisitor

elements, root, trees, treesWithSuppressWarnings, types

Constructor Summary

Constructors

Constructor	Description
InitializationVisitor(BaseTypeChecker checker)	Creates a new InitializationVisitor.

Method Summary

Modifier and Type	Method	Description
protected void	checkConstructorInvocation(AnnotatedTypeMirror.AnnotatedDeclaredType dt, AnnotatedTypeMirror.AnnotatedExecutableType constructor, NewClassTree src)	Check that the (explicit) annotations on a new class tree are comparable to the result type of the constructor.
protected void	checkConstructorResult(AnnotatedTypeMirror.AnnotatedExecutableType constructorType, ExecutableElement constructorElement)	Issue a warning if the result type of the constructor is not top.
protected boolean	checkContract(JavaExpression expr, AnnotationMirror necessaryAnnotation, AnnotationMirror inferredAnnotation, CFAbstractStore<?,?> store)	Returns true if and only if inferredAnnotation is valid for a given expression to match the necessaryAnnotation.
protected void	checkFieldsInitialized(Tree tree, boolean staticFields, Store store, List<? extends AnnotationMirror> receiverAnnotations)	Checks that all fields (all static fields if staticFields is true) are initialized in the given store.
protected void	checkThisOrSuperConstructorCall(MethodInvocationTree superCall, @CompilerMessageKey String errorKey)	Checks that the following rule is satisfied: The type on a constructor declaration must be a supertype of the return type of "this()" or "super()" invocation within that constructor.
protected void	commonAssignmentCheck(Tree varTree, ExpressionTree valueExp, @CompilerMessageKey String errorKey, Object... extraArgs)	Checks the validity of an assignment (or pseudo-assignment) from a value to a variable and emits an error message (through the compiler's messaging interface) if it is not valid.
void	processClassTree(ClassTree tree)	Type-check classTree.
void	setRoot(CompilationUnitTree root)	Set the CompilationUnitTree to be used during any visits.
Void	visitMethod(MethodTree tree, Void p)	Checks that the method obeys override and subtype rules to all overridden methods.
Void	visitTypeCast(TypeCastTree tree, Void p)
Void	visitVariable(VariableTree tree, Void p)

Methods inherited from class org.checkerframework.common.basetype.BaseTypeVisitor

checkAccess, checkAccessAllowed, checkArguments, checkArrayInitialization, checkConditionalPostcondition, checkDefaultConstructor, checkExceptionParameter, checkExplicitAnnotationsOnIntersectionBounds, checkExtendsImplements, checkFieldInvariantDeclarations, checkForPolymorphicQualifiers, checkForPolymorphicQualifiers, checkMethodInvocability, checkMethodReferenceAsOverride, checkOverride, checkOverride, checkPostcondition, checkPreconditions, checkPurity, checkQualifierParameter, checkSuperConstructorCall, checkThisConstructorCall, checkThrownExpression, checkTypeArguments, checkTypecastRedundancy, checkTypecastSafety, checkVarargs, commonAssignmentCheck, commonAssignmentCheck, commonAssignmentCheckEndDiagnostic, commonAssignmentCheckEndDiagnostic, commonAssignmentCheckStartDiagnostic, createOverrideChecker, createTypeFactory, createTypeFactoryPublic, createTypeValidator, enclosingMemberSelect, enclosingStatement, getExceptionParameterLowerBoundAnnotations, getThrowUpperBoundAnnotations, getTypeFactory, isTypeCastSafe, isValidUse, isValidUse, isValidUse, reportMethodInvocabilityError, reportPurityErrors, scan, shouldSkipUses, shouldWarnAboutIrrelevantJavaTypes, skipReceiverSubtypeCheck, testAnnotationInsertion, testJointJavacJavaParserVisitor, testTypevarContainment, typeCheckVectorCopyIntoArgument, validateType, validateTypeOf, visitAnnotatedType, visitAnnotatedType, visitAnnotation, visitAssignment, visitCatch, visitClass, visitCompilationUnit, visitCompoundAssignment, visitConditionalExpression, visitEnhancedForLoop, visitIdentifier, visitInstanceOf, visitLambdaExpression, visitMemberReference, visitMethodInvocation, visitNewArray, visitNewClass, visitReturn, visitSwitchExpression17, visitThrow, visitTypeParameter, visitUnary, warnAboutIrrelevantJavaTypes

Methods inherited from class org.checkerframework.framework.source.SourceVisitor

visit

Methods inherited from class com.sun.source.util.TreePathScanner

getCurrentPath, scan

Methods inherited from class com.sun.source.util.TreeScanner

reduce, scan, visitArrayAccess, visitArrayType, visitAssert, visitBinary, visitBindingPattern, visitBlock, visitBreak, visitCase, visitContinue, visitDefaultCaseLabel, visitDoWhileLoop, visitEmptyStatement, visitErroneous, visitExports, visitExpressionStatement, visitForLoop, visitGuardedPattern, visitIf, visitImport, visitIntersectionType, visitLabeledStatement, visitLiteral, visitMemberSelect, visitModifiers, visitModule, visitOpens, visitOther, visitPackage, visitParameterizedType, visitParenthesized, visitParenthesizedPattern, visitPrimitiveType, visitProvides, visitRequires, visitSwitch, visitSwitchExpression, visitSynchronized, visitTry, visitUnionType, visitUses, visitWhileLoop, visitWildcard, visitYield

Methods inherited from class java.lang.Object

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

Field Details

annoFormatter

protected final AnnotationFormatter annoFormatter

The annotation formatter.

initializedFields

protected final List<VariableTree> initializedFields

Constructor Details

InitializationVisitor

public InitializationVisitor(BaseTypeChecker checker)

Creates a new InitializationVisitor.

Parameters:

checker - the associated type-checker

Method Details

setRoot

public void setRoot(CompilationUnitTree root)

Description copied from class: SourceVisitor

Set the CompilationUnitTree to be used during any visits. For any later calls of com.sun.source.util.TreePathScanner.scan(TreePath, P), the CompilationUnitTree of the TreePath has to be equal to root.

Overrides:

setRoot in class BaseTypeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>>

checkConstructorInvocation

protected void checkConstructorInvocation(AnnotatedTypeMirror.AnnotatedDeclaredType dt,
 AnnotatedTypeMirror.AnnotatedExecutableType constructor,
 NewClassTree src)

Description copied from class: BaseTypeVisitor

Check that the (explicit) annotations on a new class tree are comparable to the result type of the constructor. Issue an error if not.

Issue a warning if the annotations on the constructor invocation is a subtype of the constructor result type. This is equivalent to down-casting.

Overrides:

checkConstructorInvocation in class BaseTypeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>>

checkConstructorResult

protected void checkConstructorResult(AnnotatedTypeMirror.AnnotatedExecutableType constructorType,
 ExecutableElement constructorElement)

Description copied from class: BaseTypeVisitor

Issue a warning if the result type of the constructor is not top. If it is a supertype of the class, then a conflicting.annos error will also be issued by BaseTypeVisitor.isValidUse(AnnotatedTypeMirror.AnnotatedDeclaredType,AnnotatedTypeMirror.AnnotatedDeclaredType,Tree).

Overrides:

checkConstructorResult in class BaseTypeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>>

Parameters:

constructorType - AnnotatedExecutableType for the constructor

constructorElement - element that declares the constructor

checkThisOrSuperConstructorCall

protected void checkThisOrSuperConstructorCall(MethodInvocationTree superCall,
 @CompilerMessageKey String errorKey)

Description copied from class: BaseTypeVisitor

Checks that the following rule is satisfied: The type on a constructor declaration must be a supertype of the return type of "this()" or "super()" invocation within that constructor.

Overrides:

checkThisOrSuperConstructorCall in class BaseTypeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>>

Parameters:

superCall - the AST node for the constructor call

errorKey - the error message key to use if the check fails

commonAssignmentCheck

protected void commonAssignmentCheck(Tree varTree,
 ExpressionTree valueExp,
 @CompilerMessageKey String errorKey,
 Object... extraArgs)

Description copied from class: BaseTypeVisitor

Checks the validity of an assignment (or pseudo-assignment) from a value to a variable and emits an error message (through the compiler's messaging interface) if it is not valid.

Overrides:

commonAssignmentCheck in class BaseTypeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>>

Parameters:

varTree - the AST node for the lvalue (usually a variable)

valueExp - the AST node for the rvalue (the new value)

errorKey - the error message key to use if the check fails

extraArgs - arguments to the error message key, before "found" and "expected" types

visitVariable

public Void visitVariable(VariableTree tree,
 Void p)

Specified by:

visitVariable in interface TreeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>,Value extends CFAbstractValue<Value>>

Overrides:

visitVariable in class BaseTypeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>>

checkContract

protected boolean checkContract(JavaExpression expr,
 AnnotationMirror necessaryAnnotation,
 AnnotationMirror inferredAnnotation,
 CFAbstractStore<?,?> store)

Description copied from class: BaseTypeVisitor

Returns true if and only if inferredAnnotation is valid for a given expression to match the necessaryAnnotation.

By default, inferredAnnotation must be a subtype of necessaryAnnotation, but subclasses might override this behavior.

Overrides:

checkContract in class BaseTypeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>>

visitTypeCast

public Void visitTypeCast(TypeCastTree tree,
 Void p)

Specified by:

visitTypeCast in interface TreeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>,Value extends CFAbstractValue<Value>>

Overrides:

visitTypeCast in class BaseTypeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>>

processClassTree

public void processClassTree(ClassTree tree)

Description copied from class: BaseTypeVisitor

Type-check classTree. Subclasses should override this method instead of BaseTypeVisitor.visitClass(ClassTree, Void).

Overrides:

processClassTree in class BaseTypeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>>

Parameters:

tree - class to check

visitMethod

public Void visitMethod(MethodTree tree,
 Void p)

Description copied from class: BaseTypeVisitor

Checks that the method obeys override and subtype rules to all overridden methods. (Uses the pseudo-assignment logic to do so.)

The override rule specifies that a method, m1, may override a method m2 only if:

• m1 return type is a subtype of m2
• m1 receiver type is a supertype of m2
• m1 parameters are supertypes of corresponding m2 parameters

Also, it issues a "missing.this" error for static method annotated receivers.

Specified by:

visitMethod in interface TreeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>,Value extends CFAbstractValue<Value>>

Overrides:

visitMethod in class BaseTypeVisitor<Factory extends InitializationAnnotatedTypeFactory<Value,Store,?,?>>

checkFieldsInitialized

protected void checkFieldsInitialized(Tree tree,
 boolean staticFields,
 Store store,
 List<? extends AnnotationMirror> receiverAnnotations)

Checks that all fields (all static fields if staticFields is true) are initialized in the given store.

Parameters:

tree - a ClassTree if staticFields is true; a MethodTree for a constructor if staticFields is false. This is where errors are reported, if they are not reported at the fields themselves

staticFields - whether to check static fields or instance fields

store - the store

receiverAnnotations - the annotations on the receiver