T
- the generic type parameter.public class GenericType<T> extends Object
T
.
Supports in-line instantiation of objects that represent generic types with
actual type parameters. An object that represents any parameterized type may
be obtained by sub-classing GenericType
. Alternatively, an object
representing a concrete parameterized type can be created using a
GenericType(java.lang.reflect.Type)
and manually specifying
the actual (parameterized) type
.
For example:
GenericType<List<String>> stringListType = new GenericType<List<String>>() {};
Or:
public class MyGenericType extends GenericType<List<String>> { ... } ... MyGenericType stringListType = new MyGenericType();
Note that due to the Java type erasure limitations the parameterized type information
must be specified on a subclass, not just during the instance creation. For example,
the following case would throw an IllegalArgumentException
:
public class MyGenericType<T> extends GenericType<T> { ... } ... // The type is only specified on instance, not in a sub-class MyGenericType<List<String>> stringListType = new MyGenericType<List<String>>();
Modifier | Constructor and Description |
---|---|
protected |
GenericType()
Constructs a new generic type, deriving the generic type and class from
type parameter.
|
|
GenericType(Type genericType)
Constructs a new generic type, supplying the generic type
information and deriving the class.
|
Modifier and Type | Method and Description |
---|---|
boolean |
equals(Object obj) |
Class<?> |
getRawType()
Returns the object representing the class or interface that declared
the type represented by this generic type instance.
|
Type |
getType()
Retrieve the type represented by the generic type instance.
|
int |
hashCode() |
String |
toString() |
protected GenericType()
IllegalArgumentException
- in case the generic type parameter value is not
provided by any of the subclasses.public GenericType(Type genericType)
genericType
- the generic type.IllegalArgumentException
- if genericType is null
or not an instance of
Class
or ParameterizedType
whose raw
type is an instance of Class
.public final Type getType()
public final Class<?> getRawType()
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