Compilation error when using "withFactoryMethod" on generic pojo

[mkarneim]

The compiler will issue an error when it tries to compile a generic pojo annotated with
@GeneratePojoBuilder(withFactoryMethod="*").

For example:

@GeneratePojoBuilder(withFactoryMethod="*")
public class Container<T> {
  private T value;

  public T getValue() {
    return value;
  }

  public void setValue(T value) {
    this.value = value;
  }
}

When compiling this, I get the following error:

error: non-static type variable T cannot be referenced from a static context

The reason is, that the generated factory method does not declare the generic type variable T. It can't just reuse the one declared on class level.

public class ContainerBuilder<T extends Object>
    implements Cloneable {
[...]
  public static ContainerBuilder<T> container() {
    return new ContainerBuilder();
  } 

Instead we have to introduce a new one and mapping it.

  public static <T extends Object> ContainerBuilder<T> container() {
    return new ContainerBuilder<T>();
  }