uk.co.strangeskies.reflection

Class WildcardTypes

java.lang.Object

uk.co.strangeskies.reflection.WildcardTypes

public class WildcardTypes
extends java.lang.Object

A collection of utility methods relating to wildcard types.

Method Summary

Modifier and Type	Method and Description
static boolean	hasUpperBound(java.lang.reflect.WildcardType wildcard)
static java.lang.reflect.WildcardType	wildcard() Create an unbounded wildcard type.
static java.lang.reflect.WildcardType	wildcardExtending(java.util.Collection<? extends java.lang.reflect.Type> bounds) Create an upper bounded wildcard type.
static java.lang.reflect.WildcardType	wildcardExtending(java.lang.reflect.Type... bounds) Create an upper bounded wildcard type.
static java.lang.reflect.WildcardType	wildcardSuper(java.util.Collection<? extends java.lang.reflect.Type> bounds) Create an lower bounded wildcard type.
static java.lang.reflect.WildcardType	wildcardSuper(java.lang.reflect.Type... bounds) Create an lower bounded wildcard type.

Methods inherited from class java.lang.Object

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

Method Detail

wildcard

public static java.lang.reflect.WildcardType wildcard()

Create an unbounded wildcard type.

Returns:

An instance of WildcardType representing an unbounded wildcard.

wildcardSuper

public static java.lang.reflect.WildcardType wildcardSuper(java.lang.reflect.Type... bounds)

Create an lower bounded wildcard type.

Parameters:

bounds - The types we wish form the lower bounds for a wildcard.

Returns:

An instance of WildcardType representing a wildcard with the given lower bound.

wildcardSuper

public static java.lang.reflect.WildcardType wildcardSuper(java.util.Collection<? extends java.lang.reflect.Type> bounds)

Create an lower bounded wildcard type.

Parameters:

bounds - The types we wish form the lower bounds for a wildcard.

Returns:

An instance of WildcardType representing a wildcard with the given lower bound.

wildcardExtending

public static java.lang.reflect.WildcardType wildcardExtending(java.lang.reflect.Type... bounds)

Create an upper bounded wildcard type.

Parameters:

bounds - The types we wish form the upper bounds for a wildcard.

Returns:

An instance of WildcardType representing a wildcard with the given upper bound.

wildcardExtending

public static java.lang.reflect.WildcardType wildcardExtending(java.util.Collection<? extends java.lang.reflect.Type> bounds)

Create an upper bounded wildcard type.

Parameters:

bounds - The types we wish form the upper bounds for a wildcard.

Returns:

An instance of WildcardType representing a wildcard with the given upper bound.

hasUpperBound

public static boolean hasUpperBound(java.lang.reflect.WildcardType wildcard)

Parameters:

wildcard - the wildcard to test

Returns:

true if the given types has a meaningful upper bound, i.e. other than Object