How to retrieve Enum name using the id?

Question

I have the enum as:

public enum EnumStatus {

    PASSED(40L, \"Has Passed\"),
    AVERAGE(60L, \"Has Average Marks\"),
    GOOD(80L, \"Has Good         


        

Answer 1

Define contract

/**
 * Contract that will allow Types with id to have generic implementation.
 */
public interface IdentifierType {
  T getId();
}

Apply contract

public enum EntityType implements IdentifierType {
  ENTITY1(1, "ONE), ENTITY2(2, "TWO");

  private Integer id;
  private String name;

  private EntityType(int id, String name) {
    this.id = id;
    this.name = name;
  }

  public static EntityType valueOf(Integer id) {
    return EnumHelper.INSTANCE.valueOf(id, EntityType.values());
  }

  @Override
  public Integer getId() {
    return id;
  }
}

Helper/Util

public enum EnumHelper {
  INSTANCE;

  /**
   * This will return {@link Enum} constant out of provided {@link Enum} values with the specified id.
   * @param id the id of the constant to return.
   * @param values the {@link Enum} constants of specified type.
   * @return the {@link Enum} constant.
   */
  public , S> T valueOf(S id, T[] values) {
    if (!values[0].getClass().isEnum()) {
        throw new IllegalArgumentException("Values provided to scan is not an Enum");
    }

    T type = null;

    for (int i = 0; i < values.length && type == null; i++) {
        if (values[i].getId().equals(id)) {
            type = values[i];
        }
    }

    return type;
  }
}