checkers.nullness
Class NullnessAnnotatedTypeFactory

java.lang.Object
  checkers.types.AnnotatedTypeFactory
      checkers.nullness.NullnessAnnotatedTypeFactory

public class NullnessAnnotatedTypeFactory
extends AnnotatedTypeFactory

Adds the NonNull annotation to a type that is:

1. (*) all literals (except for null literal)
2. (*) all primitive types
3. (*) an array-creation expression (with new)
4. (*) an object-creation expression (with new)
5. (*) a package declaration
6. in the scope of a DefaultQualifier annotation and matches its location criteria
7. determined to be NonNull by flow-sensitive inference
8. the class in a static member access (e.g., "System" in "System.out")
9. an exception parameter
10. the receiver type of a non-static (and non-constructor) method

Adds the Raw annotation to

11. the receiver type of constructors.

Additionally, the type factory will add the Nullable annotation to a type if the input is

12. (*) the null literal
13. of type Void,
14. may resolve the types of some NonNull fields as Nullable depending on the presence of a Raw annotation on a constructor or method receiver. Please review the Checker Framework for Raw semantics.

Implementation detail: (*) cases are handled by a meta-annotation rather than by code in this class.

Nested Class Summary

Modifier and Type	Class and Description

Nested classes/interfaces inherited from class checkers.types.AnnotatedTypeFactory

AnnotatedTypeFactory.InheritedFromClassAnnotator

Field Summary

Modifier and Type	Field and Description
protected AnnotationMirror	LAZYNONNULL Represents the Nullness Checker qualifiers
protected AnnotationMirror	NONNULL Represents the Nullness Checker qualifiers
protected AnnotationMirror	NULLABLE Represents the Nullness Checker qualifiers
protected AnnotationMirror	POLYNULL Represents the Nullness Checker qualifiers
protected AnnotationMirror	RAW Represents the Nullness Checker qualifiers

Fields inherited from class checkers.types.AnnotatedTypeFactory

annotations, atypes, elements, env, fromTreeCache, qualHierarchy, root, trees, types, visitorState

Constructor and Description

NullnessAnnotatedTypeFactory(NullnessSubchecker checker, CompilationUnitTree root)
Creates a NullnessAnnotatedTypeFactory.

Method Summary

Modifier and Type	Method and Description
protected AnnotationMirror	aliasedAnnotation(AnnotationMirror a) Aliased annotations.
protected void	annotateImplicit(Element elt, AnnotatedTypeMirror type) Adds implicit annotations to a type obtained from a Element.
protected void	annotateImplicit(Tree tree, AnnotatedTypeMirror type) Adds implicit annotations to a type obtained from a Tree.
AnnotatedTypeMirror.AnnotatedExecutableType	constructorFromUse(NewClassTree tree) Determines the AnnotatedTypeMirror.AnnotatedExecutableType of a constructor invocation.
AnnotatedTypeMirror.AnnotatedDeclaredType	getEnclosingType(TypeElement element, Tree tree)
protected AnnotatedTypeMirror.AnnotatedDeclaredType	getImplicitReceiverType(Tree tree)
AnnotatedTypeMirror.AnnotatedExecutableType	methodFromUse(MethodInvocationTree tree) Determines the type of the invoked method based on the passed method invocation tree.
protected void	postDirectSuperTypes(AnnotatedTypeMirror type, List<? extends AnnotatedTypeMirror> supertypes) A callback method for the AnnotatedTypeFactory subtypes to customize directSuperTypes().

Methods inherited from class checkers.types.AnnotatedTypeFactory

annotateInheritedFromClass, canHaveAnnotatedTypeParameters, createLRUCache, declarationFromElement, fromClass, fromElement, fromElement, fromElement, fromExpression, fromMember, fromNewClass, fromTypeTree, getAnnotatedType, getAnnotatedType, getAnnotatedType, getAnnotatedType, getAnnotatedType, getAnnotatedType, getAnnotatedType, getAnnotatedType, getAnnotatedType, getAnnotatedType, getAnnotatedTypeFromTypeTree, getBoxedType, getCurrentClassType, getCurrentMethodReceiver, getPath, getQualifierHierarchy, getReceiver, getSelfType, getUnboxedType, getVisitorState, isMostEnclosingThisDeref, isWithinConstructor, postAsMemberOf, unify

Methods inherited from class java.lang.Object

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

Field Detail

POLYNULL

protected final AnnotationMirror POLYNULL

Represents the Nullness Checker qualifiers

NONNULL

protected final AnnotationMirror NONNULL

Represents the Nullness Checker qualifiers

RAW

protected final AnnotationMirror RAW

Represents the Nullness Checker qualifiers

NULLABLE

protected final AnnotationMirror NULLABLE

Represents the Nullness Checker qualifiers

LAZYNONNULL

protected final AnnotationMirror LAZYNONNULL

Represents the Nullness Checker qualifiers

Constructor Detail

NullnessAnnotatedTypeFactory

public NullnessAnnotatedTypeFactory(NullnessSubchecker checker,
                                    CompilationUnitTree root)

Creates a NullnessAnnotatedTypeFactory.

Method Detail

annotateImplicit

protected void annotateImplicit(Element elt,
                                AnnotatedTypeMirror type)

Description copied from class: AnnotatedTypeFactory

Adds implicit annotations to a type obtained from a Element. By default, this method does nothing. Subclasses should use this method to implement implicit annotations specific to their type systems.

Overrides:

annotateImplicit in class AnnotatedTypeFactory

Parameters:

elt - an element

type - the type obtained from elt

annotateImplicit

protected void annotateImplicit(Tree tree,
                                AnnotatedTypeMirror type)

Description copied from class: AnnotatedTypeFactory

Adds implicit annotations to a type obtained from a Tree. By default, this method does nothing. Subclasses should use this method to implement implicit annotations specific to their type systems.

Overrides:

annotateImplicit in class AnnotatedTypeFactory

Parameters:

tree - an AST node

type - the type obtained from tree

getImplicitReceiverType

protected AnnotatedTypeMirror.AnnotatedDeclaredType getImplicitReceiverType(Tree tree)

Overrides:

getImplicitReceiverType in class AnnotatedTypeFactory

getEnclosingType

public final AnnotatedTypeMirror.AnnotatedDeclaredType getEnclosingType(TypeElement element,
                                                                        Tree tree)

Overrides:

getEnclosingType in class AnnotatedTypeFactory

postDirectSuperTypes

protected void postDirectSuperTypes(AnnotatedTypeMirror type,
                                    List<? extends AnnotatedTypeMirror> supertypes)

Description copied from class: AnnotatedTypeFactory

A callback method for the AnnotatedTypeFactory subtypes to customize directSuperTypes(). Overriding methods should merely change the annotations on the supertypes, without adding or removing new types The default provided implementation adds type annotations to supertypes. This allows the type and its supertypes to have the qualifiers, e.g. the supertypes of an Immutable type are also Immutable.

Overrides:

postDirectSuperTypes in class AnnotatedTypeFactory

Parameters:

type - the type whose supertypes are desired

supertypes - the supertypes as specified by the base AnnotatedTypeFactory

methodFromUse

public AnnotatedTypeMirror.AnnotatedExecutableType methodFromUse(MethodInvocationTree tree)

Description copied from class: AnnotatedTypeFactory

Determines the type of the invoked method based on the passed method invocation tree. The returned method type has all type variables resolved, whether based on receiver type, passed type parameters if any, and method invocation parameter. Subclasses may override this method to customize inference of types or qualifiers based on method invocation parameters. As an implementation detail, this method depends on AnnotatedTypes.asMemberOf(AnnotatedTypeMirror, Element), and customization based on receiver type should be in accordance to its specification.

Overrides:

methodFromUse in class AnnotatedTypeFactory

Parameters:

tree - the method invocation tree

Returns:

the method type being invoked with tree

constructorFromUse

public AnnotatedTypeMirror.AnnotatedExecutableType constructorFromUse(NewClassTree tree)

Description copied from class: AnnotatedTypeFactory

Determines the AnnotatedTypeMirror.AnnotatedExecutableType of a constructor invocation. Note that this is different than calling AnnotatedTypeFactory.getAnnotatedType(Tree) or AnnotatedTypeFactory.fromExpression(ExpressionTree) on the constructor invocation; those determine the type of the result of invoking the constructor, which is probably an AnnotatedTypeMirror.AnnotatedDeclaredType.

Overrides:

constructorFromUse in class AnnotatedTypeFactory

Parameters:

tree - a constructor invocation

Returns:

the annotated type of the invoked constructor (as an executable type)

aliasedAnnotation

protected AnnotationMirror aliasedAnnotation(AnnotationMirror a)

Aliased annotations.

Overrides:

aliasedAnnotation in class AnnotatedTypeFactory