ch.jalu.typeresolver

Class CommonTypeUtils

java.lang.Object

ch.jalu.typeresolver.CommonTypeUtils

public final class CommonTypeUtils
extends Object

Contains simple utility methods for Type objects.

Method Summary

Modifier and Type	Method and Description
static @Nullable Class<?>	getDefinitiveClass(Type type) Returns the Class equivalent of the type for which there is an absolute class equivalent, i.e.
static Class<?>	getRawType(ParameterizedType parameterizedType) Convenience method which returns the raw type of the given parameterized type cast as Class.
static boolean	hasExplicitUpperBound(WildcardType wildcardType) Returns whether the given wildcard type has an explicitly defined upper bound.

Methods inherited from class java.lang.Object

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

Method Detail

getRawType

public static Class<?> getRawType(ParameterizedType parameterizedType)

Convenience method which returns the raw type of the given parameterized type cast as Class.

Background: in current JRE versions, the raw type can only be a Class, so the raw type can be cast without checking it beforehand.

Parameters:

parameterizedType - the parameterized type whose raw type should be returned

Returns:

the raw type of the parameterized type

hasExplicitUpperBound

public static boolean hasExplicitUpperBound(WildcardType wildcardType)

Returns whether the given wildcard type has an explicitly defined upper bound.

Background: the JRE sets the upper bounds to an array with one element of Object.class if the wildcard has lower bounds, or if the wildcard has no specified bounds (i.e. a simple "?").

Parameters:

wildcardType - the wildcard type to analyze

Returns:

true if it has a specific upper bound

getDefinitiveClass

@Nullable
public static @Nullable Class<?> getDefinitiveClass(Type type)

Returns the Class equivalent of the type for which there is an absolute class equivalent, i.e. for all Class, ParameterizedType and for some GenericArrayType instances.

Parameters:

type - the type to return as class if possible

Returns:

the type as class, or null if not applicable