Package com.google.inject.internal

Class MoreTypes

java.lang.Object

com.google.inject.internal.MoreTypes

public class MoreTypes
extends Object

Static methods for working with types that we aren't publishing in the public Types API.

Author:

jessewilson@google.com (Jesse Wilson)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MoreTypes.GenericArrayTypeImpl
static class	MoreTypes.ParameterizedTypeImpl
static class	MoreTypes.WildcardTypeImpl	The WildcardType interface supports multiple upper bounds and multiple lower bounds.

Field Summary

Fields

Modifier and Type	Field	Description
static Type[]	EMPTY_TYPE_ARRAY

Method Summary

Modifier and Type	Method	Description
static Type	canonicalize(Type type)	Returns a type that is functionally equal but not necessarily equal according to Object.equals().
static <T> TypeLiteral<T>	canonicalizeForKey(TypeLiteral<T> typeLiteral)	Returns an type that's appropriate for use in a key.
static <T> Key<T>	canonicalizeKey(Key<T> key)	Returns a key that doesn't hold any references to parent classes.
static boolean	equals(Type a, Type b)	Returns true if a and b are equal.
static Type	getGenericSupertype(Type type, Class<?> rawType, Class<?> toResolve)	Returns the generic supertype for type.
static Class<?>	getRawType(Type type)
static Type	resolveTypeVariable(Type type, Class<?> rawType, TypeVariable<?> unknown)
static String	typeToString(Type type)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_TYPE_ARRAY

public static final Type[] EMPTY_TYPE_ARRAY

Method Detail

canonicalizeKey

public static <T> Key<T> canonicalizeKey(Key<T> key)

Returns a key that doesn't hold any references to parent classes. This is necessary for anonymous keys, so ensure we don't hold a ref to the containing module (or class) forever.

canonicalizeForKey

public static <T> TypeLiteral<T> canonicalizeForKey(TypeLiteral<T> typeLiteral)

Returns an type that's appropriate for use in a key.

If the raw type of typeLiteral is a javax.inject.Provider, this returns a com.google.inject.Provider with the same type parameters.

If the type is a primitive, the corresponding wrapper type will be returned.

Throws:

ConfigurationException - if type contains a type variable

canonicalize

public static Type canonicalize(Type type)

Returns a type that is functionally equal but not necessarily equal according to Object.equals(). The returned type is Serializable.

getRawType

public static Class<?> getRawType(Type type)

equals

public static boolean equals(Type a,
                             Type b)

Returns true if a and b are equal.

typeToString

public static String typeToString(Type type)

getGenericSupertype

public static Type getGenericSupertype(Type type,
                                       Class<?> rawType,
                                       Class<?> toResolve)

Returns the generic supertype for type. For example, given a class IntegerSet, the result for when supertype is Set.class is Set<Integer> and the result when the supertype is Collection.class is Collection<Integer>.

resolveTypeVariable

public static Type resolveTypeVariable(Type type,
                                       Class<?> rawType,
                                       TypeVariable<?> unknown)