java.lang.Object
- com.google.auto.common.MoreTypes

```
public final class MoreTypes
extends Object
```
Utilities related to TypeMirror instances.

Since:

2.0

Author:

Gregory Kick

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static ArrayType`	`asArray(TypeMirror maybeArrayType)`	Returns a `ArrayType` if the `TypeMirror` represents an array or throws an `IllegalArgumentException`.
`static DeclaredType`	`asDeclared(TypeMirror maybeDeclaredType)`	Returns a `DeclaredType` if the `TypeMirror` represents a declared type such as a class, interface, union/compound, or enum or throws an `IllegalArgumentException`.
`static Element`	`asElement(TypeMirror typeMirror)`	An alternate implementation of `Types.asElement(javax.lang.model.type.TypeMirror)` that does not require a `Types` instance with the notable difference that it will throw `IllegalArgumentException` instead of returning null if the `TypeMirror` can not be converted to an `Element`.
`static ErrorType`	`asError(TypeMirror maybeErrorType)`	Returns a `ExecutableType` if the `TypeMirror` represents an executable type such as may result from missing code, or bad compiles or throws an `IllegalArgumentException`.
`static ExecutableType`	`asExecutable(TypeMirror maybeExecutableType)`	Returns a `ExecutableType` if the `TypeMirror` represents an executable type such as a method, constructor, or initializer or throws an `IllegalArgumentException`.
`static IntersectionType`	`asIntersection(TypeMirror maybeIntersectionType)`	Returns an `IntersectionType` if the `TypeMirror` represents an intersection-type or throws an `IllegalArgumentException`.
`static TypeMirror`	`asMemberOf(Types types, DeclaredType container, VariableElement variable)`	Resolves a `VariableElement` parameter to a method or constructor based on the given container, or a member of a class.
`static NoType`	`asNoType(TypeMirror maybeNoType)`	Returns a `NoType` if the `TypeMirror` represents an non-type such as void, or package, etc.
`static NullType`	`asNullType(TypeMirror maybeNullType)`	Returns a `NullType` if the `TypeMirror` represents the null type or throws an `IllegalArgumentException`.
`static PrimitiveType`	`asPrimitiveType(TypeMirror maybePrimitiveType)`	Returns a `PrimitiveType` if the `TypeMirror` represents a primitive type or throws an `IllegalArgumentException`.
`static TypeElement`	`asTypeElement(TypeMirror mirror)`
`static com.google.common.collect.ImmutableSet<TypeElement>`	`asTypeElements(Iterable<? extends TypeMirror> mirrors)`
`static TypeVariable`	`asTypeVariable(TypeMirror maybeTypeVariable)`	Returns a `TypeVariable` if the `TypeMirror` represents a type variable or throws an `IllegalArgumentException`.
`static WildcardType`	`asWildcard(TypeMirror maybeWildcardType)`	Returns a `WildcardType` if the `TypeMirror` represents a wildcard type or throws an `IllegalArgumentException`.
`static com.google.common.base.Equivalence<TypeMirror>`	`equivalence()`	Returns an `Equivalence` that can be used to compare types.
`static boolean`	`isConversionFromObjectUnchecked(TypeMirror type)`	Returns true if casting `Object` to the given type will elicit an unchecked warning from the compiler.
`static boolean`	`isType(TypeMirror type)`	Returns true if the raw type underlying the given `TypeMirror` represents a type that can be referenced by a `Class`.
`static boolean`	`isTypeOf(Class<?> clazz, TypeMirror type)`	Returns true if the raw type underlying the given `TypeMirror` represents the same raw type as the given `Class` and throws an IllegalArgumentException if the `TypeMirror` does not represent a type that can be referenced by a `Class`
`static com.google.common.base.Optional<DeclaredType>`	`nonObjectSuperclass(Types types, Elements elements, DeclaredType type)`	Returns the superclass of `type`, with any type parameters bound by `type`, or `Optional.absent()` if `type` is an interface or `Object` or its superclass is `Object`.
`static com.google.common.collect.ImmutableSet<TypeElement>`	`referencedTypes(TypeMirror type)`	Returns the set of types that are referenced by the given `TypeMirror`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - equivalence
```
public static com.google.common.base.Equivalence<TypeMirror> equivalence()
```
    Returns an Equivalence that can be used to compare types. The standard way to compare types is Types.isSameType, but this alternative may be preferred in a number of cases:
    
    If you don't have an instance of Types.
    If you want a reliable hashCode() for the types, for example to construct a set of types using HashSet with Equivalence.wrap(Object).
    If you want distinct type variables to be considered equal if they have the same names and bounds.
    If you want wildcard types to compare equal if they have the same bounds. Types.isSameType never considers wildcards equal, even when comparing a type to itself.
  - referencedTypes
```
public static com.google.common.collect.ImmutableSet<TypeElement> referencedTypes(TypeMirror type)
```
    Returns the set of types that are referenced by the given TypeMirror.
  - asElement
```
public static Element asElement(TypeMirror typeMirror)
```
    An alternate implementation of Types.asElement(javax.lang.model.type.TypeMirror) that does not require a Types instance with the notable difference that it will throw IllegalArgumentException instead of returning null if the TypeMirror can not be converted to an Element.
    
    Throws:
    
    NullPointerException - if typeMirror is null
    
    IllegalArgumentException - if typeMirror cannot be converted to an Element
  - asTypeElement
```
public static TypeElement asTypeElement(TypeMirror mirror)
```
  - asTypeElements
```
public static com.google.common.collect.ImmutableSet<TypeElement> asTypeElements(Iterable<? extends TypeMirror> mirrors)
```
  - asArray
```
public static ArrayType asArray(TypeMirror maybeArrayType)
```
    Returns a ArrayType if the TypeMirror represents an array or throws an IllegalArgumentException.
  - asDeclared
```
public static DeclaredType asDeclared(TypeMirror maybeDeclaredType)
```
    Returns a DeclaredType if the TypeMirror represents a declared type such as a class, interface, union/compound, or enum or throws an IllegalArgumentException.
  - asError
```
public static ErrorType asError(TypeMirror maybeErrorType)
```
    Returns a ExecutableType if the TypeMirror represents an executable type such as may result from missing code, or bad compiles or throws an IllegalArgumentException.
  - asExecutable
```
public static ExecutableType asExecutable(TypeMirror maybeExecutableType)
```
    Returns a ExecutableType if the TypeMirror represents an executable type such as a method, constructor, or initializer or throws an IllegalArgumentException.
  - asIntersection
```
public static IntersectionType asIntersection(TypeMirror maybeIntersectionType)
```
    Returns an IntersectionType if the TypeMirror represents an intersection-type or throws an IllegalArgumentException.
  - asNoType
```
public static NoType asNoType(TypeMirror maybeNoType)
```
    Returns a NoType if the TypeMirror represents an non-type such as void, or package, etc. or throws an IllegalArgumentException.
  - asNullType
```
public static NullType asNullType(TypeMirror maybeNullType)
```
    Returns a NullType if the TypeMirror represents the null type or throws an IllegalArgumentException.
  - asPrimitiveType
```
public static PrimitiveType asPrimitiveType(TypeMirror maybePrimitiveType)
```
    Returns a PrimitiveType if the TypeMirror represents a primitive type or throws an IllegalArgumentException.
  - asTypeVariable
```
public static TypeVariable asTypeVariable(TypeMirror maybeTypeVariable)
```
    Returns a TypeVariable if the TypeMirror represents a type variable or throws an IllegalArgumentException.
  - asWildcard
```
public static WildcardType asWildcard(TypeMirror maybeWildcardType)
```
    Returns a WildcardType if the TypeMirror represents a wildcard type or throws an IllegalArgumentException.
  - isType
```
public static boolean isType(TypeMirror type)
```
    Returns true if the raw type underlying the given TypeMirror represents a type that can be referenced by a Class. If this returns true, then isTypeOf(java.lang.Class<?>, javax.lang.model.type.TypeMirror) is guaranteed to not throw.
  - isTypeOf
```
public static boolean isTypeOf(Class<?> clazz,
                               TypeMirror type)
```
    Returns true if the raw type underlying the given TypeMirror represents the same raw type as the given Class and throws an IllegalArgumentException if the TypeMirror does not represent a type that can be referenced by a Class
  - nonObjectSuperclass
```
public static com.google.common.base.Optional<DeclaredType> nonObjectSuperclass(Types types,
                                                                                Elements elements,
                                                                                DeclaredType type)
```
    Returns the superclass of type, with any type parameters bound by type, or Optional.absent() if type is an interface or Object or its superclass is Object.
  - asMemberOf
```
public static TypeMirror asMemberOf(Types types,
                                    DeclaredType container,
                                    VariableElement variable)
```
    Resolves a VariableElement parameter to a method or constructor based on the given container, or a member of a class. For parameters to a method or constructor, the variable's enclosing element must be a supertype of the container type. For example, given a container of type Set<String>, and a variable corresponding to the E e parameter in the Set.add(E e) method, this will return a TypeMirror for String.
  - isConversionFromObjectUnchecked
```
public static boolean isConversionFromObjectUnchecked(TypeMirror type)
```
    Returns true if casting Object to the given type will elicit an unchecked warning from the compiler. Only type variables and parameterized types such as List<String> produce such warnings. There will be no warning if the type's only type parameters are simple wildcards, as in Map<?, ?>.

Class MoreTypes

Method Summary

Methods inherited from class java.lang.Object

Method Detail

equivalence

referencedTypes

asElement

asTypeElement

asTypeElements

asArray

asDeclared

asError

asExecutable

asIntersection

asNoType

asNullType

asPrimitiveType

asTypeVariable

asWildcard

isType

isTypeOf

nonObjectSuperclass

asMemberOf

isConversionFromObjectUnchecked