Package javax.ws.rs.core
Class GenericType<T>
java.lang.Object
javax.ws.rs.core.GenericType<T>
- Type Parameters:
T
- the generic type parameter.
Represents a generic message entity type
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>>();
- Since:
- 2.0
-
Constructor Summary
ConstructorsModifierConstructorDescriptionprotected
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. -
Method Summary
-
Constructor Details
-
GenericType
protected GenericType()Constructs a new generic type, deriving the generic type and class from type parameter. Note that this constructor is protected, users should create a (usually anonymous) subclass as shown above.- Throws:
IllegalArgumentException
- in case the generic type parameter value is not provided by any of the subclasses.
-
GenericType
Constructs a new generic type, supplying the generic type information and deriving the class.- Parameters:
genericType
- the generic type.- Throws:
IllegalArgumentException
- if genericType isnull
or not an instance ofClass
orParameterizedType
whose raw type is an instance ofClass
.
-
-
Method Details
-
getType
Retrieve the type represented by the generic type instance.- Returns:
- the actual type represented by this generic type instance.
-
getRawType
Returns the object representing the class or interface that declared the type represented by this generic type instance.- Returns:
- the class or interface that declared the type represented by this generic type instance.
-
equals
-
hashCode
public int hashCode() -
toString
-