GenericType

java.lang.Object
- jakarta.ws.rs.core.GenericType<T>

Type Parameters:

T - the generic type parameter.
```
public class GenericType<T>
extends java.lang.Object
```
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

Constructors
Modifier	Constructor and Description
`protected`	`GenericType()` Constructs a new generic type, deriving the generic type and class from type parameter.
	`GenericType(java.lang.reflect.Type genericType)` Constructs a new generic type, supplying the generic type information and deriving the class.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`equals(java.lang.Object obj)`
`static GenericType`	`forInstance(java.lang.Object instance)` Create a `generic type` from a Java `instance`.
`java.lang.Class<?>`	`getRawType()` Returns the object representing the class or interface that declared the type represented by this generic type instance.
`java.lang.reflect.Type`	`getType()` Retrieve the type represented by the generic type instance.
`int`	`hashCode()`
`java.lang.String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - 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:
    
    java.lang.IllegalArgumentException - in case the generic type parameter value is not provided by any of the subclasses.
  - GenericType
```
public GenericType(java.lang.reflect.Type genericType)
```
    Constructs a new generic type, supplying the generic type information and deriving the class.
    
    Parameters:
    
    genericType - the generic type.
    
    Throws:
    
    java.lang.IllegalArgumentException - if genericType is null or not an instance of Class or ParameterizedType whose raw type is an instance of Class.
- Method Detail
  - forInstance
```
public static GenericType forInstance(java.lang.Object instance)
```
    Create a generic type from a Java instance.
    If the supplied instance is a GenericEntity, the generic type will be computed using the GenericEntity.getType(). Otherwise instance.getClass() will be used.
    
    Parameters:
    
    instance - Java instance for which the GenericType description should be created.
    
    Returns:
    
    GenericType describing the Java instance.
    
    Since:
    
    2.1
  - getType
```
public final java.lang.reflect.Type getType()
```
    Retrieve the type represented by the generic type instance.
    
    Returns:
    
    the actual type represented by this generic type instance.
  - getRawType
```
public final java.lang.Class<?> 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
```
public boolean equals(java.lang.Object obj)
```
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object

Class GenericType<T>

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

GenericType

GenericType

Method Detail

forInstance

getType

getRawType

equals

hashCode

toString