lombok-pg: @EnumId

@EnumId

Need enum identifier besides the field name?

Overview

There are situations where enum.valueOf() just isn't enough, where you need other fields to be indentifier for all the different enum values. Doing that usually involved a fair amount of boilerplate. Now it's just one simple annotation.

With Lombok

01 import lombok.EnumId;
02 import lombok.RequiredArgsConstructor;
03 import lombok.Getter;
04 
05 public class EnumIdExample {
06   @RequiredArgsConstructor
07   public enum Status {
08     WAITING(0),
09     READY(1),
10     SKIPPED(-1),
11     COMPLETED(5);
12     
13     @EnumId
14     @Getter
15     private final int code;
16   }
17 }

Vanilla Java

01 class EnumIdExample {
02   public enum Status {
03     WAITING(0),
04     READY(1),
05     SKIPPED(-1),
06     COMPLETED(5);
07     
08     private static final java.util.Map<java.lang.Integer, Status> $CODE_LOOKUP = new java.util.HashMap<java.lang.Integer, Status>();
09     static {
10       for (Status status : Status.values()) {
11         $CODE_LOOKUP.put(status.code, status);
12       }
13     }
14     
15     private final int code;
16     
17     private Status(final int code) {
18       this.code = code;
19     }
20     
21     public int getCode() {
22       return this.code;
23     }
24     
25     public static Status findByCode(final int code) {
26       if ($CODE_LOOKUP.containsKey(code)) {
27         return $CODE_LOOKUP.get(code);
28       }
29       throw new java.lang.IllegalArgumentException(java.lang.String.format("Enumeration \'Status\' has no value \'%s\'", code));
30     }
31   }
32 }

Small print

Smallprint