Examples of javax.ws.rs.core.GenericEntity

javax.ws.rs.core.GenericEntity
Represents a message entity of a generic type {@code T}.
Normally type erasure removes generic type information such that a {@link Response} instance that contains, e.g., an entity of type{@code List} appears to contain a raw {@code List} at runtime.When the generic type is required to select a suitable {@link javax.ws.rs.ext.MessageBodyWriter}, this class may be used to wrap the entity and capture its generic type.

There are two ways to create an instance:
1. Create a (typically anonymous) subclass of this class which enables retrieval of the type information at runtime despite type erasure. For example, the following code shows how to create a {@link Response} containing an entity of type {@code List
  } whosegeneric type will be available at runtime for selection of a suitable {@link javax.ws.rs.ext.MessageBodyWriter}:
```
List<String> list = new ArrayList<String>(); GenericEntity<List<String>> entity = new GenericEntity<List<String>>(list) {}; Response response = Response.ok(entity).build();
```
  where {@code list} is the instance of {@code List}that will form the response body and entity is an instance of an anonymous subclass of {@code GenericEntity}.
2. Create an instance directly by supplying the generic type information with the entity. For example the following code shows how to create a response containing the result of a method invoked via reflection:
```
Method method = ...; GenericEntity<Object> entity = new GenericEntity<Object>( method.invoke(...), method.getGenericReturnType()); Response response = Response.ok(entity).build();
```
@param < T> response entity instance type @author Paul Sandoz @author Marc Hadley @see GenericType @since 1.0

      Type generic = genericType;
      Class type = entity.getClass();
      Object ent = entity;
      if (entity instanceof GenericEntity)
      {
         GenericEntity ge = (GenericEntity) entity;
         generic = ge.getType();
         ent = ge.getEntity();
         type = ent.getClass();
      }
      MediaType contentType = resolveContentType();
      MessageBodyWriter writer = providerFactory.getMessageBodyWriter(
              type, generic, annotations, contentType);

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        Type entityType = entity.getClass();


        // if the entity is generic, get specific type and class
        if (entity instanceof GenericEntity) {
            final GenericEntity generic = (GenericEntity)entity;
            entityType = generic.getType(); // overwrite
            entity = generic.getEntity();
        }


        final Class entityClass = entity.getClass();


        ByteArrayOutputStream out = new ByteArrayOutputStream();

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      status = response.getStatus();
      headers = response.getMetadata();
      entity = response.getEntity();
      if (entity instanceof GenericEntity)
      {
         GenericEntity ge = (GenericEntity)entity;
         entity = ge.getEntity();
         entityType = ge.getType();
      }
      else
      {
         if (entity != null)
            entityType = entity.getClass();

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        }


        GenericType responseGenericType = new GenericType(method.getGenericReturnType());
        if (entity != null) {
            if (entityType instanceof ParameterizedType) {
                entity = new GenericEntity(entity, entityType);
            }
            result = b.method(httpMethod, Entity.entity(entity, contentType), responseGenericType);
        } else {
            result = b.method(httpMethod, responseGenericType);
        }

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