org.checkerframework.checker.units

Class UnitsRelationsTools

java.lang.Object

org.checkerframework.checker.units.UnitsRelationsTools

public class UnitsRelationsTools
extends Object

A helper class for UnitsRelations, providing numerous methods which help process Annotations and Annotated Types representing various units.

Constructor Summary

Constructors

Constructor and Description
UnitsRelationsTools()

Method Summary

Modifier and Type	Method and Description
static @Nullable AnnotationMirror	buildAnnoMirrorWithDefaultPrefix(ProcessingEnvironment env, Class<? extends Annotation> annoClass) Creates an AnnotationMirror representing a unit defined by annoClass, with the default Prefix of Prefix.one.
static @Nullable AnnotationMirror	buildAnnoMirrorWithNoPrefix(ProcessingEnvironment env, CharSequence annoClass) Creates an AnnotationMirror representing a unit defined by annoClass, with no prefix.
static @Nullable AnnotationMirror	buildAnnoMirrorWithSpecificPrefix(ProcessingEnvironment env, CharSequence annoClass, Prefix p) Creates an AnnotationMirror representing a unit defined by annoClass, with the specific Prefix p.
static @Nullable AnnotationMirror	buildAnnoMirrorWithSpecificPrefix(ProcessingEnvironment env, Class<? extends Annotation> annoClass, Prefix p) Creates an AnnotationMirror representing a unit defined by annoClass, with the specific Prefix p.
static @Nullable Prefix	getPrefix(AnnotatedTypeMirror annoType) Retrieves the SI Prefix of an Annotated Type.
static @Nullable Prefix	getPrefix(AnnotationMirror unitsAnnotation) Retrieves the SI Prefix of an Annotation.
static boolean	hasNoPrefix(AnnotatedTypeMirror annoType) Checks to see if an Annotated Type has no prefix.
static boolean	hasNoPrefix(AnnotationMirror unitsAnnotation) Checks to see if an Annotation has no prefix (ie, no value element).
static boolean	hasNoUnits(AnnotatedTypeMirror annoType) Checks to see if a particular Annotated Type has no units, such as scalar constants in calculations.
static boolean	hasSpecificUnit(AnnotatedTypeMirror annoType, AnnotationMirror unitsAnnotation) Checks to see if a particular Annotated Type has a specific unit (represented by its Annotation).
static boolean	hasSpecificUnitIgnoringPrefix(AnnotatedTypeMirror annoType, AnnotationMirror unitsAnnotation) Checks to see if a particular Annotated Type has a particular base unit (represented by its Annotation).
static AnnotatedTypeMirror	removePrefix(Elements elements, AnnotatedTypeMirror annoType) Removes the Prefix value from an Annotated Type, by constructing and returning a copy of the Annotated Type without the prefix.
static @Nullable AnnotationMirror	removePrefix(Elements elements, AnnotationMirror unitsAnnotation) Removes the prefix value from an Annotation, by constructing and returning a copy of its base SI unit's Annotation.

Methods inherited from class java.lang.Object

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

Constructor Detail

UnitsRelationsTools

public UnitsRelationsTools()

Method Detail

buildAnnoMirrorWithSpecificPrefix

public static @Nullable AnnotationMirror buildAnnoMirrorWithSpecificPrefix(ProcessingEnvironment env,
                                                                           CharSequence annoClass,
                                                                           Prefix p)

Creates an AnnotationMirror representing a unit defined by annoClass, with the specific Prefix p.

Parameters:

env - the Checker Processing Environment, provided as a parameter in init() of a UnitsRelations implementation

annoClass - the fully-qualified name of an Annotation representing a Unit (eg m.class for meters)

p - a Prefix value

Returns:

an AnnotationMirror of the Unit with the Prefix p, or null if it cannot be constructed

buildAnnoMirrorWithNoPrefix

public static @Nullable AnnotationMirror buildAnnoMirrorWithNoPrefix(ProcessingEnvironment env,
                                                                     CharSequence annoClass)

Creates an AnnotationMirror representing a unit defined by annoClass, with no prefix.

Parameters:

env - checker Processing Environment, provided as a parameter in init() of a UnitsRelations implementation

annoClass - the getElementValueClassname of an Annotation representing a Unit (eg m.class for meters)

Returns:

an AnnotationMirror of the Unit with no prefix, or null if it cannot be constructed

getPrefix

public static @Nullable Prefix getPrefix(AnnotatedTypeMirror annoType)

Retrieves the SI Prefix of an Annotated Type.

Parameters:

annoType - an AnnotatedTypeMirror representing a Units Annotated Type

Returns:

a Prefix value (including Prefix.one), or null if it has none

getPrefix

public static @Nullable Prefix getPrefix(AnnotationMirror unitsAnnotation)

Retrieves the SI Prefix of an Annotation.

Parameters:

unitsAnnotation - an AnnotationMirror representing a Units Annotation

Returns:

a Prefix value (including Prefix.one), or null if it has none

hasNoPrefix

public static boolean hasNoPrefix(AnnotatedTypeMirror annoType)

Checks to see if an Annotated Type has no prefix.

Parameters:

annoType - an AnnotatedTypeMirror representing a Units Annotated Type

Returns:

true if it has no prefix, false otherwise

hasNoPrefix

public static boolean hasNoPrefix(AnnotationMirror unitsAnnotation)

Checks to see if an Annotation has no prefix (ie, no value element).

Parameters:

unitsAnnotation - an AnnotationMirror representing a Units Annotation

Returns:

true if it has no prefix, false otherwise

removePrefix

public static @Nullable AnnotationMirror removePrefix(Elements elements,
                                                      AnnotationMirror unitsAnnotation)

Removes the prefix value from an Annotation, by constructing and returning a copy of its base SI unit's Annotation.

Parameters:

elements - the Element Utilities from a checker's processing environment, typically obtained by calling env.getElementUtils() in init() of a Units Relations implementation

unitsAnnotation - an AnnotationMirror representing a Units Annotation

Returns:

the base SI Unit's AnnotationMirror, or null if the base SI Unit cannot be constructed

removePrefix

public static AnnotatedTypeMirror removePrefix(Elements elements,
                                               AnnotatedTypeMirror annoType)

Removes the Prefix value from an Annotated Type, by constructing and returning a copy of the Annotated Type without the prefix.

Parameters:

elements - the Element Utilities from a checker's processing environment, typically obtained by calling env.getElementUtils() in init() of a Units Relations implementation

annoType - an AnnotatedTypeMirror representing a Units Annotated Type

Returns:

a copy of the Annotated Type without the prefix

hasNoUnits

public static boolean hasNoUnits(AnnotatedTypeMirror annoType)

Checks to see if a particular Annotated Type has no units, such as scalar constants in calculations.

Any number that isn't assigned a unit will automatically get the Annotation UnknownUnits. eg: int x = 5; // x has @UnknownUnits

Parameters:

annoType - an AnnotatedTypeMirror representing a Units Annotated Type

Returns:

true if the Type has no units, false otherwise

hasSpecificUnit

public static boolean hasSpecificUnit(AnnotatedTypeMirror annoType,
                                      AnnotationMirror unitsAnnotation)

Checks to see if a particular Annotated Type has a specific unit (represented by its Annotation).

Parameters:

annoType - an AnnotatedTypeMirror representing a Units Annotated Type

unitsAnnotation - an AnnotationMirror representing a Units Annotation of a specific unit

Returns:

true if the Type has the specific unit, false otherwise

hasSpecificUnitIgnoringPrefix

public static boolean hasSpecificUnitIgnoringPrefix(AnnotatedTypeMirror annoType,
                                                    AnnotationMirror unitsAnnotation)

Checks to see if a particular Annotated Type has a particular base unit (represented by its Annotation).

Parameters:

annoType - an AnnotatedTypeMirror representing a Units Annotated Type

unitsAnnotation - an AnnotationMirror representing a Units Annotation of the base unit

Returns:

true if the Type has the specific unit, false otherwise

buildAnnoMirrorWithSpecificPrefix

public static @Nullable AnnotationMirror buildAnnoMirrorWithSpecificPrefix(ProcessingEnvironment env,
                                                                           Class<? extends Annotation> annoClass,
                                                                           Prefix p)

Creates an AnnotationMirror representing a unit defined by annoClass, with the specific Prefix p.

This interface is intended only for subclasses of UnitsRelations; other clients should use buildAnnoMirrorWithSpecificPrefix(ProcessingEnvironment, CharSequence, Prefix)

Parameters:

env - the Checker Processing Environment, provided as a parameter in init() of a UnitsRelations implementation

annoClass - the Class of an Annotation representing a Unit (eg m.class for meters)

p - a Prefix value

Returns:

an AnnotationMirror of the Unit with the Prefix p, or null if it cannot be constructed

buildAnnoMirrorWithDefaultPrefix

public static @Nullable AnnotationMirror buildAnnoMirrorWithDefaultPrefix(ProcessingEnvironment env,
                                                                          Class<? extends Annotation> annoClass)

Creates an AnnotationMirror representing a unit defined by annoClass, with the default Prefix of Prefix.one.

This interface is intended only for subclasses of UnitsRelations; other clients should not use it.

Parameters:

env - the Checker Processing Environment, provided as a parameter in init() of a UnitsRelations implementation

annoClass - the Class of an Annotation representing a Unit (eg m.class for meters)

Returns:

an AnnotationMirror of the Unit with Prefix.one, or null if it cannot be constructed