checkers.fenum
Class FenumChecker

java.lang.Object
  javax.annotation.processing.AbstractProcessor
      com.sun.source.util.AbstractTypeProcessor
          checkers.source.SourceChecker
              checkers.basetype.BaseTypeChecker
                  checkers.fenum.FenumChecker

All Implemented Interfaces:

Processor

@SupportedOptions(value="quals")
@SupportedLintOptions(value="flowinference")
public class FenumChecker
extends BaseTypeChecker

The main checker class for the fake enum checker. There are two options to distinguish different enumerators:

1. @Fenum("Name"): introduces a fake enumerator with the name "Name". Enumerators with different names are distinct. The default name is empty, but you are encouraged to use a unique name for your purpose.
2. Alternatively, you can specify the annotation to use with the -Aqual command line argument.
TODO: document flowinference lint option.

Author:

wmdietl

Field Summary

Modifier and Type	Field and Description

Fields inherited from class checkers.source.SourceChecker

currentPath, currentRoot, env, messager, messages, trees

Fields inherited from class javax.annotation.processing.AbstractProcessor

processingEnv

Constructor and Description

FenumChecker()


Method Summary

Modifier and Type	Method and Description
protected QualifierHierarchy	createQualifierHierarchy() Returns the type qualifier hierarchy graph to be used by this processor.
protected Set<Class<? extends Annotation>>	createSupportedTypeQualifiers() Copied from BasicChecker.
Collection<String>	getSuppressWarningsKey() Copied from BasicChecker; cannot reuse it, because BasicChecker is final.
boolean	isValidUse(AnnotatedTypeMirror.AnnotatedDeclaredType declarationType, AnnotatedTypeMirror.AnnotatedDeclaredType useType) Tests that the qualifiers present on the useType are valid qualifiers, given the qualifiers on the declaration of the type, declarationType.

Methods inherited from class checkers.basetype.BaseTypeChecker

createFactory, createSourceVisitor, createTypeHierarchy, getQualifierHierarchy, getSupportedLintOptions, getSupportedTypeQualifiers, init, isAssignable, isSubtype

Methods inherited from class checkers.source.SourceChecker

fullMessageOf, getLintOption, getLintOption, getMessages, getProcessingEnvironment, getShouldSkip, getSupportedAnnotationTypes, getSupportedOptions, getSupportedSourceVersion, message, report, typeProcess

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

process, typeProcessingOver

Methods inherited from class javax.annotation.processing.AbstractProcessor

getCompletions, isInitialized, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

FenumChecker

public FenumChecker()

Method Detail

createSupportedTypeQualifiers

protected Set<Class<? extends Annotation>> createSupportedTypeQualifiers()

Copied from BasicChecker. Instead of returning an empty set if no "quals" option is given, we return Fenum as the only qualifier.

Overrides:

createSupportedTypeQualifiers in class BaseTypeChecker

Returns:

the type qualifiers supported this processor, or an empty set if none

See Also:

TypeQualifiers

getSuppressWarningsKey

public Collection<String> getSuppressWarningsKey()

Copied from BasicChecker; cannot reuse it, because BasicChecker is final.

Overrides:

getSuppressWarningsKey in class SourceChecker

Returns:

String keys that a checker honors for suppressing warnings and errors that it issues

See Also:

SuppressWarningsKey

isValidUse

public boolean isValidUse(AnnotatedTypeMirror.AnnotatedDeclaredType declarationType,
                          AnnotatedTypeMirror.AnnotatedDeclaredType useType)

Description copied from class: BaseTypeChecker

Tests that the qualifiers present on the useType are valid qualifiers, given the qualifiers on the declaration of the type, declarationType.

The check is shallow, as it does not descend into generic or array types (i.e. only performing the validity check on the raw type or outermost array dimension). BaseTypeVisitor.validateTypeOf(Tree) would call this for each type argument or array dimension separately.

For instance, in the IGJ type system, a @Mutable is an invalid qualifier for String, as String is declared as @Immutable String.

In most cases, useType simply needs to be a subtype of declarationType, but there are exceptions. In IGJ, a variable may be declared @ReadOnly String, even though String is @Immutable String; ReadOnly is not a subtype of Immutable.

Overrides:

isValidUse in class BaseTypeChecker

Parameters:

declarationType - the type of the class (TypeElement)

useType - the use of the class (instance type)

Returns:

if the useType is a valid use of elemType

createQualifierHierarchy

protected QualifierHierarchy createQualifierHierarchy()

Description copied from class: BaseTypeChecker

Returns the type qualifier hierarchy graph to be used by this processor. The implementation builds the type qualifier hierarchy for the BaseTypeChecker.getSupportedTypeQualifiers() using the meta-annotations found in them. The current implementation returns an instance of GraphQualifierHierarchy. Subclasses may override this method to express any relationships that cannot be inferred using meta-annotations (e.g. due to lack of meta-annotations).

Overrides:

createQualifierHierarchy in class BaseTypeChecker

Returns:

an annotation relation tree representing the supported qualifiers