io.micronaut.annotation.processing

Class GenericUtils

java.lang.Object

io.micronaut.annotation.processing.GenericUtils

@Internal
public class GenericUtils
extends Object

Utility methods for dealing with generic type signatures.

Author:

Graeme Rocher

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	GenericUtils(Elements elementUtils, Types typeUtils, ModelUtils modelUtils)

Method Summary

Modifier and Type	Method and Description
Map<String,TypeMirror>	alignNewGenericsInfo(List<? extends TypeParameterElement> typeParameters, List<? extends TypeMirror> typeArguments, Map<String,TypeMirror> genericsInfo) Takes the bound generic information and re-aligns for the new type.
Map<String,Map<String,TypeMirror>>	alignNewGenericsInfo(TypeElement typeElement, List<? extends TypeMirror> typeArguments, Map<String,TypeMirror> genericsInfo) Takes a type element and the bound generic information and re-aligns for the new type.
Map<String,Map<String,TypeMirror>>	buildGenericTypeArgumentElementInfo(Element element) Builds type argument information for the given type.
Map<String,Map<String,TypeMirror>>	buildGenericTypeArgumentElementInfo(Element element, DeclaredType declaredType) Builds type argument information for the given type.
Map<String,Map<String,TypeMirror>>	buildGenericTypeArgumentElementInfo(Element element, DeclaredType declaredType, Map<String,TypeMirror> boundTypes) Builds type argument information for the given type.
protected Optional<TypeMirror>	getFirstTypeArgument(TypeMirror type) Return the first type argument for the given type mirror.
List<? extends TypeMirror>	interfaceGenericTypesFor(TypeElement element, String interfaceName) Finds the generic types for the given interface for the given class element.
protected Map<String,TypeMirror>	resolveBoundTypes(DeclaredType type) Resolve bound types for the given declared type.
protected TypeMirror	resolveTypeReference(TypeMirror mirror)
protected TypeMirror	resolveTypeReference(TypeMirror mirror, Map<String,TypeMirror> boundTypes) Resolve a type reference to use for the given type mirror taking into account generic type variables.

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericUtils

protected GenericUtils(Elements elementUtils,
                       Types typeUtils,
                       ModelUtils modelUtils)

Parameters:

elementUtils - The Elements

typeUtils - The Types

modelUtils - The ModelUtils

Method Detail

buildGenericTypeArgumentElementInfo

public Map<String,Map<String,TypeMirror>> buildGenericTypeArgumentElementInfo(@NonNull
                                                                              Element element)

Builds type argument information for the given type.

Parameters:

element - The element

Returns:

The type argument information

buildGenericTypeArgumentElementInfo

public Map<String,Map<String,TypeMirror>> buildGenericTypeArgumentElementInfo(@NonNull
                                                                              Element element,
                                                                              @Nullable
                                                                              DeclaredType declaredType)

Builds type argument information for the given type.

Parameters:

element - The element

declaredType - The declared type

Returns:

The type argument information

buildGenericTypeArgumentElementInfo

public Map<String,Map<String,TypeMirror>> buildGenericTypeArgumentElementInfo(@NonNull
                                                                              Element element,
                                                                              @Nullable
                                                                              DeclaredType declaredType,
                                                                              Map<String,TypeMirror> boundTypes)

Builds type argument information for the given type.

Parameters:

element - The element

declaredType - The declared type

boundTypes - The type variables

Returns:

The type argument information

interfaceGenericTypesFor

public List<? extends TypeMirror> interfaceGenericTypesFor(TypeElement element,
                                                           String interfaceName)

Finds the generic types for the given interface for the given class element.

Parameters:

element - The class element

interfaceName - The interface

Returns:

The generic types or an empty list

getFirstTypeArgument

protected Optional<TypeMirror> getFirstTypeArgument(TypeMirror type)

Return the first type argument for the given type mirror. For example for Optional<String> this will return String.

Parameters:

type - The type

Returns:

The first argument.

resolveTypeReference

protected TypeMirror resolveTypeReference(TypeMirror mirror)

Parameters:

mirror - The TypeMirror

Returns:

The resolved type reference

resolveTypeReference

protected TypeMirror resolveTypeReference(TypeMirror mirror,
                                          Map<String,TypeMirror> boundTypes)

Resolve a type reference to use for the given type mirror taking into account generic type variables.

Parameters:

mirror - The mirror

boundTypes - The already bound types for any type variable

Returns:

A type reference

resolveBoundTypes

protected Map<String,TypeMirror> resolveBoundTypes(DeclaredType type)

Resolve bound types for the given declared type.

Parameters:

type - The declaring type

Returns:

The type bounds

alignNewGenericsInfo

public Map<String,Map<String,TypeMirror>> alignNewGenericsInfo(TypeElement typeElement,
                                                               List<? extends TypeMirror> typeArguments,
                                                               Map<String,TypeMirror> genericsInfo)

Takes a type element and the bound generic information and re-aligns for the new type.

Parameters:

typeElement - The type element

typeArguments - The type arguments

genericsInfo - The generic info

Returns:

The aligned generics

alignNewGenericsInfo

public Map<String,TypeMirror> alignNewGenericsInfo(List<? extends TypeParameterElement> typeParameters,
                                                   List<? extends TypeMirror> typeArguments,
                                                   Map<String,TypeMirror> genericsInfo)

Takes the bound generic information and re-aligns for the new type.

Parameters:

typeParameters - The type parameters

typeArguments - The type arguments

genericsInfo - The generic info

Returns:

The aligned generics