org.sonatype.guice.bean.reflect

Class TypeParameters

java.lang.Object

org.sonatype.guice.bean.reflect.TypeParameters

public final class TypeParameters
extends Object

Utility methods for dealing with generic type parameters and arguments.

Method Summary

Methods

Modifier and Type	Method and Description
static com.google.inject.TypeLiteral<?>[]	get(com.google.inject.TypeLiteral<?> typeLiteral) Get all type arguments from a generic type, for example [Foo,Bar] from Map<Foo,Bar>.
static com.google.inject.TypeLiteral<?>	get(com.google.inject.TypeLiteral<?> typeLiteral, int index) Get an indexed type argument from a generic type, for example Bar from Map<Foo,Bar>.
static boolean	isAssignableFrom(com.google.inject.TypeLiteral<?> superLiteral, com.google.inject.TypeLiteral<?> subLiteral) Determines if the sub-type can be converted to the generic super-type via an identity or widening conversion.
static boolean	isConcrete(Class<?> clazz) Determines if the given raw type represents a concrete type.
static boolean	isConcrete(com.google.inject.TypeLiteral<?> literal) Determines if the given generic type represents a concrete type.
static boolean	isImplicit(Class<?> clazz) Determines if the given raw type represents an implicit binding.
static boolean	isImplicit(com.google.inject.TypeLiteral<?> literal) Determines if the given generic type represents an implicit binding.

Methods inherited from class java.lang.Object

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

Method Detail

get

public static com.google.inject.TypeLiteral<?>[] get(com.google.inject.TypeLiteral<?> typeLiteral)

Get all type arguments from a generic type, for example [Foo,Bar] from Map<Foo,Bar>.

Parameters:

typeLiteral - The generic type

Returns:

Array of type arguments

get

public static com.google.inject.TypeLiteral<?> get(com.google.inject.TypeLiteral<?> typeLiteral,
                                   int index)

Get an indexed type argument from a generic type, for example Bar from Map<Foo,Bar>.

Parameters:

typeLiteral - The generic type

index - The argument index

Returns:

Indexed type argument; TypeLiteral<Object> if the given type is a raw class

isAssignableFrom

public static boolean isAssignableFrom(com.google.inject.TypeLiteral<?> superLiteral,
                       com.google.inject.TypeLiteral<?> subLiteral)

Determines if the sub-type can be converted to the generic super-type via an identity or widening conversion.

Parameters:

superLiteral - The generic super-type

subLiteral - The generic sub-type

Returns:

true if the sub-type can be converted to the generic super-type; otherwise false

See Also:

Class.isAssignableFrom(Class)

isConcrete

public static boolean isConcrete(com.google.inject.TypeLiteral<?> literal)

Determines if the given generic type represents a concrete type.

Parameters:

literal - The generic type

Returns:

true if the generic type is concrete; otherwise false

isConcrete

public static boolean isConcrete(Class<?> clazz)

Determines if the given raw type represents a concrete type.

Parameters:

clazz - The raw type

Returns:

true if the raw type is concrete; otherwise false

isImplicit

public static boolean isImplicit(com.google.inject.TypeLiteral<?> literal)

Determines if the given generic type represents an implicit binding.

Parameters:

literal - The generic type

Returns:

true if the generic type is implicit; otherwise false

isImplicit

public static boolean isImplicit(Class<?> clazz)

Determines if the given raw type represents an implicit binding.

Parameters:

clazz - The raw type

Returns:

true if the raw type is implicit; otherwise false