将 Java 枚举重构为核心项目，该项目不包含枚举指向的类

Question

I have 2 Java projects, core-project and component-project .

core-project is a dependency to component-project .

component-project originally contained an Enum eg:

public enum ResourceType {

  APP("app", "App", App.class),

  WORKSPACE("ws", "Workspace", Workspace.class);

  private String extension;

  private String description;

  private Class<?> klass;

  ResourceType(final String extension, final String description, final Class<?> klass) {
    this.extension = extension;
    this.description = description;
    this.klass = klass;
  }
}

The problem is that I now need to move ResourceType down into core-project but I cannot move Workspace.class down into core-project , it must remain in component-project .

What would be an elegant approach to refactor this Enum into core-project ?

Answer 1

One (not too elegant) way could be something like

public enum ResourceType {

    APP("app", "App", "com.example.App"),

    WORKSPACE("ws", "Workspace", "com.example.Workspace");

    private String extension;

    private String description;

    private Class<?> klass;

    ResourceType(final String extension, final String description, final String klass) {
        this.extension = extension;
        this.description = description;
        try {
            this.klass = Class.forName(klass);
        } catch (Exception e) {
            this.klass = null;
        }
    }
}

With the expectation of some NPEs when the classes aren't present...