<p>출처1 : <a href="https://www.baeldung.com/jackson-serialize-enums" target="_blank">https://www.baeldung.com/jackson-serialize-enums</a></p><p>출처2 : <a href="https://stackoverflow.com/questions/17006239/whats-the-best-way-to-implement-next-and-previous-on-an-enum-type" target="_blank">https://stackoverflow.com/questions/17006239/whats-the-best-way-to-implement-next-and-previous-on-an-enum-type</a></p><p><br></p><p>특정 클래스를 만들려다보니 enum 클래스를 사용하는게 맞다는 판단이 들었다.&nbsp;</p><p><br></p><h4>문자열로 직렬화/역직렬화</h4><p>아래와 같이 사용하면 기본적인 serialize는 구축되는 것 같다.&nbsp;</p><div style="color: rgb(212, 212, 212); background-color: rgb(30, 30, 30); font-family: D2Coding, Consolas, &quot;Courier New&quot;, monospace, Consolas, &quot;Courier New&quot;, monospace; font-size: 13px; line-height: 18px; white-space: pre;"><div><span style="color: #569cd6;">import</span> com.fasterxml.jackson.annotation.JsonValue;</div><div><span style="color: #569cd6;">import</span> lombok.extern.slf4j.Slf4j;</div><br><div><span style="color: #569cd6;">import</span> java.util.Collections;</div><div><span style="color: #569cd6;">import</span> java.util.Map;</div><div><span style="color: #569cd6;">import</span> java.util.concurrent.ConcurrentHashMap;</div><br><div>@<span style="color: #4ec9b0;">Slf4j</span></div><div><span style="color: #569cd6;">public</span> <span style="color: #569cd6;">enum</span> <span style="color: #4ec9b0;">WorkType</span> {</div><br><div>&nbsp; &nbsp; BUY_DOMAIN(<span style="color: #ce9178;">"BUY_DOMAIN"</span>),</div><div>&nbsp; &nbsp; CONFIG_LOAD_BALANCER(<span style="color: #ce9178;">"CONFIG_LOAD_BALANCER"</span>),</div><div>&nbsp; &nbsp; CONFIG_NGINX_HTTP(<span style="color: #ce9178;">"CONFIG_NGINX_HTTP"</span>),</div><div>&nbsp; &nbsp; RELOAD_NGINX_HTTP(<span style="color: #ce9178;">"RELOAD_NGINX_HTTP"</span>),</div><div>&nbsp; &nbsp; GET_CERTIFICATE(<span style="color: #ce9178;">"GET_CERTIFICATE"</span>),</div><div>&nbsp; &nbsp; CONFIG_NGINX_TLS(<span style="color: #ce9178;">"CONFIG_NGINX_TLS"</span>),</div><div>&nbsp; &nbsp; RELOAD_NGINX_TLS(<span style="color: #ce9178;">"RELOAD_NGINX_TLS"</span>),</div><div>&nbsp; &nbsp; COMPLETE(<span style="color: #ce9178;">"COMPLETE"</span>);</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">private</span> <span style="color: #4ec9b0;">String</span> <span style="color: #9cdcfe;">name</span>;</div><div>&nbsp; &nbsp; <span style="color: #569cd6;">private</span> <span style="color: #569cd6;">static</span> <span style="color: #569cd6;">final</span> <span style="color: #4ec9b0;">Map</span>&lt;<span style="color: #4ec9b0;">String</span>, <span style="color: #4ec9b0;">WorkType</span>&gt; <span style="color: #9cdcfe;">ENUM_MAP</span>;</div><br><div>&nbsp; &nbsp; <span style="color: #dcdcaa;">WorkType</span>(<span style="color: #4ec9b0;">String</span> <span style="color: #9cdcfe;">name</span>) {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #569cd6;">this</span>.<span style="color: #9cdcfe;">name</span> = name;</div><div>&nbsp; &nbsp; }</div><br><div>&nbsp; &nbsp; @<span style="color: #4ec9b0;">JsonValue</span></div><div>&nbsp; &nbsp; <span style="color: #569cd6;">public</span> <span style="color: #4ec9b0;">String</span> <span style="color: #dcdcaa;">getName</span>() {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #c586c0;">return</span> <span style="color: #569cd6;">this</span>.<span style="color: #9cdcfe;">name</span>;</div><div>&nbsp; &nbsp; }</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">static</span> {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #4ec9b0;">Map</span>&lt;<span style="color: #4ec9b0;">String</span>, <span style="color: #4ec9b0;">WorkType</span>&gt; <span style="color: #9cdcfe;">map</span> = <span style="color: #c586c0;">new</span> <span style="color: #4ec9b0;">ConcurrentHashMap</span>&lt;<span style="color: #4ec9b0;">String</span>, <span style="color: #4ec9b0;">WorkType</span>&gt;();</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #c586c0;">for</span> (<span style="color: #4ec9b0;">WorkType</span> <span style="color: #9cdcfe;">instance</span> <span style="color: #c586c0;">:</span> <span style="color: #9cdcfe;">WorkType</span>.<span style="color: #dcdcaa;">values</span>()) {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #9cdcfe;">map</span>.<span style="color: #dcdcaa;">put</span>(<span style="color: #9cdcfe;">instance</span>.<span style="color: #dcdcaa;">getName</span>().<span style="color: #dcdcaa;">toLowerCase</span>(), instance);</div><div>&nbsp; &nbsp; &nbsp; &nbsp; }</div><div>&nbsp; &nbsp; &nbsp; &nbsp; ENUM_MAP = <span style="color: #9cdcfe;">Collections</span>.<span style="color: #dcdcaa;">unmodifiableMap</span>(map);</div><div>&nbsp; &nbsp; }</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">public</span> <span style="color: #569cd6;">static</span> <span style="color: #4ec9b0;">WorkType</span> <span style="color: #dcdcaa;">get</span>(<span style="color: #4ec9b0;">String</span> <span style="color: #9cdcfe;">name</span>) {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #c586c0;">return</span> <span style="color: #9cdcfe;">ENUM_MAP</span>.<span style="color: #dcdcaa;">get</span>(<span style="color: #9cdcfe;">name</span>.<span style="color: #dcdcaa;">toLowerCase</span>());</div><div>&nbsp; &nbsp; }</div><br><div>}</div></div><p><br></p><p><br></p><p>역직렬화시에 추가적인 일을 하고 싶으면 아래와 같이 별도로 만들어서 사용하는 클래스에 위임시켜도 된다.&nbsp;</p><div style="color: rgb(212, 212, 212); background-color: rgb(30, 30, 30); font-family: D2Coding, Consolas, &quot;Courier New&quot;, monospace, Consolas, &quot;Courier New&quot;, monospace; font-size: 13px; line-height: 18px; white-space: pre;"><div><span style="color: #569cd6;">import</span> com.fasterxml.jackson.core.JsonParser;</div><div><span style="color: #569cd6;">import</span> com.fasterxml.jackson.databind.DeserializationContext;</div><div><span style="color: #569cd6;">import</span> com.fasterxml.jackson.databind.JsonNode;</div><div><span style="color: #569cd6;">import</span> com.fasterxml.jackson.databind.deser.std.StdDeserializer;</div><br><div><span style="color: #569cd6;">import</span> java.io.IOException;</div><br><div><span style="color: #569cd6;">public</span> <span style="color: #569cd6;">class</span> <span style="color: #4ec9b0;">WorkTypeEnumDeserializer</span> <span style="color: #569cd6;">extends</span> <span style="color: #4ec9b0;">StdDeserializer</span>&lt;<span style="color: #4ec9b0;">WorkType</span>&gt; {</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">protected</span> <span style="color: #dcdcaa;">WorkTypeEnumDeserializer</span>() {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #569cd6;">this</span>(<span style="color: #569cd6;">null</span>);</div><div>&nbsp; &nbsp; }</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">protected</span> <span style="color: #dcdcaa;">WorkTypeEnumDeserializer</span>(<span style="color: #4ec9b0;">Class</span>&lt;<span style="color: #569cd6;">?</span>&gt; <span style="color: #9cdcfe;">vc</span>) {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #569cd6;">super</span>(vc);</div><div>&nbsp; &nbsp; }</div><br><div>&nbsp; &nbsp; @<span style="color: #4ec9b0;">Override</span></div><div>&nbsp; &nbsp; <span style="color: #569cd6;">public</span> <span style="color: #4ec9b0;">WorkType</span> <span style="color: #dcdcaa;">deserialize</span>(<span style="color: #4ec9b0;">JsonParser</span> <span style="color: #9cdcfe;">jsonParser</span>, <span style="color: #4ec9b0;">DeserializationContext</span> <span style="color: #9cdcfe;">ctxt</span>) <span style="color: #569cd6;">throws</span> <span style="color: #4ec9b0;">IOException</span> {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #4ec9b0;">JsonNode</span> <span style="color: #9cdcfe;">node</span> = <span style="color: #9cdcfe;">jsonParser</span>.<span style="color: #dcdcaa;">getCodec</span>().<span style="color: #dcdcaa;">readTree</span>(jsonParser);</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #c586c0;">return</span> <span style="color: #9cdcfe;">WorkType</span>.<span style="color: #dcdcaa;">get</span>(<span style="color: #9cdcfe;">node</span>.<span style="color: #dcdcaa;">asText</span>());</div><div>&nbsp; &nbsp; }</div><br><div>}</div><br></div><p><br></p><p>클래스에 사용</p><div style="color: rgb(212, 212, 212); background-color: rgb(30, 30, 30); font-family: D2Coding, Consolas, &quot;Courier New&quot;, monospace, Consolas, &quot;Courier New&quot;, monospace; font-size: 13px; line-height: 18px; white-space: pre;"><div><span style="color: #569cd6;">import</span> com.fasterxml.jackson.databind.annotation.JsonDeserialize;</div><div><span style="color: #569cd6;">import</span> lombok.Getter;</div><div><span style="color: #569cd6;">import</span> lombok.Setter;</div><br><div><span style="color: #569cd6;">import</span> java.io.Serializable;</div><br><div>@<span style="color: #4ec9b0;">Getter</span></div><div>@<span style="color: #4ec9b0;">Setter</span></div><div><span style="color: #569cd6;">public</span> <span style="color: #569cd6;">class</span> <span style="color: #4ec9b0;">Work</span> <span style="color: #569cd6;">implements</span> <span style="color: #4ec9b0;">Serializable</span> {</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">private</span> <span style="color: #569cd6;">static</span> <span style="color: #569cd6;">final</span> <span style="color: #4ec9b0;">long</span> <span style="color: #9cdcfe;">serialVersionUID</span> = -<span style="color: #b5cea8;">7034101458765902089L</span>;</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">private</span> <span style="color: #4ec9b0;">String</span> <span style="color: #9cdcfe;">eventId</span>;</div><div>&nbsp; &nbsp; </div><div>&nbsp; &nbsp; @<span style="color: #4ec9b0;">JsonDeserialize</span>(using = <span style="color: #9cdcfe;">WorkTypeEnumDeserializer</span>.<span style="color: #9cdcfe;">class</span>)</div><div>&nbsp; &nbsp; <span style="color: #569cd6;">private</span> <span style="color: #4ec9b0;">WorkType</span> <span style="color: #9cdcfe;">currentWorkType</span>;</div><div>}</div></div><p><br></p><p><br></p><hr><p><br></p><h3>다음 enum 가져오기</h3><p>아래와 같이 next를 만들어 주면 된다.&nbsp;</p><p>nextFor 함수처럼 만들면 마지막 다음엔 가장 처음 것을 가져온다.&nbsp;</p><div style="color: rgb(212, 212, 212); background-color: rgb(30, 30, 30); font-family: D2Coding, Consolas, &quot;Courier New&quot;, monospace, Consolas, &quot;Courier New&quot;, monospace; font-size: 13px; line-height: 18px; white-space: pre;"><div><span style="color: #569cd6;">import</span> com.fasterxml.jackson.annotation.JsonValue;</div><div><span style="color: #569cd6;">import</span> lombok.extern.slf4j.Slf4j;</div><br><div><span style="color: #569cd6;">import</span> java.util.Collections;</div><div><span style="color: #569cd6;">import</span> java.util.Map;</div><div><span style="color: #569cd6;">import</span> java.util.concurrent.ConcurrentHashMap;</div><br><div>@<span style="color: #4ec9b0;">Slf4j</span></div><div><span style="color: #569cd6;">public</span> <span style="color: #569cd6;">enum</span> <span style="color: #4ec9b0;">WorkType</span> {</div><br><div>&nbsp; &nbsp; BUY_DOMAIN(<span style="color: #ce9178;">"BUY_DOMAIN"</span>),</div><div>&nbsp; &nbsp; CONFIG_LOAD_BALANCER(<span style="color: #ce9178;">"CONFIG_LOAD_BALANCER"</span>),</div><div>&nbsp; &nbsp; CONFIG_NGINX_HTTP(<span style="color: #ce9178;">"CONFIG_NGINX_HTTP"</span>),</div><div>&nbsp; &nbsp; RELOAD_NGINX_HTTP(<span style="color: #ce9178;">"RELOAD_NGINX_HTTP"</span>),</div><div>&nbsp; &nbsp; GET_CERTIFICATE(<span style="color: #ce9178;">"GET_CERTIFICATE"</span>),</div><div>&nbsp; &nbsp; CONFIG_NGINX_TLS(<span style="color: #ce9178;">"CONFIG_NGINX_TLS"</span>),</div><div>&nbsp; &nbsp; RELOAD_NGINX_TLS(<span style="color: #ce9178;">"RELOAD_NGINX_TLS"</span>),</div><div>&nbsp; &nbsp; COMPLETE(<span style="color: #ce9178;">"COMPLETE"</span>);</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">private</span> <span style="color: #4ec9b0;">String</span> <span style="color: #9cdcfe;">name</span>;</div><div>&nbsp; &nbsp; <span style="color: #569cd6;">private</span> <span style="color: #569cd6;">static</span> <span style="color: #569cd6;">final</span> <span style="color: #4ec9b0;">Map</span>&lt;<span style="color: #4ec9b0;">String</span>, <span style="color: #4ec9b0;">WorkType</span>&gt; <span style="color: #9cdcfe;">ENUM_MAP</span>;</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">static</span> {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; VALS = <span style="color: #dcdcaa;">values</span>();</div><div>&nbsp; &nbsp; }</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">private</span> <span style="color: #569cd6;">static</span> <span style="color: #4ec9b0;">WorkType</span>[] <span style="color: #9cdcfe;">VALS</span>;</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">public</span> <span style="color: #4ec9b0;">WorkType</span> <span style="color: #dcdcaa;">next</span>() {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #4ec9b0;">int</span> <span style="color: #9cdcfe;">next</span> = (<span style="color: #569cd6;">this</span>.<span style="color: #dcdcaa;">ordinal</span>() + <span style="color: #b5cea8;">1</span>);</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #c586c0;">if</span> (next &gt;= <span style="color: #9cdcfe;">VALS</span>.<span style="color: #9cdcfe;">length</span>)</div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #c586c0;">return</span> <span style="color: #569cd6;">null</span>;</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #c586c0;">else</span></div><div>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #c586c0;">return</span> <span style="color: #4ec9b0;">VALS</span>[next];</div><div>&nbsp; &nbsp; }</div><br><div>&nbsp; &nbsp; <span style="color: #569cd6;">public</span> <span style="color: #4ec9b0;">WorkType</span> <span style="color: #dcdcaa;">nextFor</span>()</div><div>&nbsp; &nbsp; {</div><div>&nbsp; &nbsp; &nbsp; &nbsp; <span style="color: #c586c0;">return</span> <span style="color: #4ec9b0;">VALS</span>[(<span style="color: #569cd6;">this</span>.<span style="color: #dcdcaa;">ordinal</span>()+<span style="color: #b5cea8;">1</span>) % <span style="color: #9cdcfe;">VALS</span>.<span style="color: #9cdcfe;">length</span>];</div><div>&nbsp; &nbsp; }</div><br><div>}</div></div><p><br></p><p><br></p><p><br></p><p><br></p><p><br></p><p><br></p><p><br></p><p><br></p>

[Java] enum 사용하기