Java enumeration and Spring Converter no longer generates enum drop-down

Author: arey

README.md

@@ -22,7 +22,7 @@ java -jar build/libs/enum-problem-example-0.0.1-SNAPSHOT.jar
 
 ![img_166.png](img_166.png)
 
-### In 1.6.8 there isn't drop-down (so enum from @schema-annotation isn't generated as expected)
+### In 1.6.7 and 1.6.13 there isn't drop-down (so enum from @schema-annotation isn't generated as expected)
 
 ```
 [{"name":"fooBar","in":"path","required":true,"schema":{"type":"string"}}]

build.gradle.kts

@@ -15,10 +15,13 @@ repositories {
 
 dependencies {
     implementation("org.springframework.boot:spring-boot-starter-web")
-    // Change version to 1.6.7 or 1.6.8 to test problem with enum in swagger ui
+    // Change version to 1.6.7 or 1.6.13 to test problem with enum in swagger ui
     implementation("org.springdoc:springdoc-openapi-ui:1.6.6")
     implementation("org.springdoc:springdoc-openapi-data-rest:1.6.6")
 
-    //implementation("org.springdoc:springdoc-openapi-ui:1.6.8")
-    //implementation("org.springdoc:springdoc-openapi-data-rest:1.6.8")
+//    implementation("org.springdoc:springdoc-openapi-ui:1.6.7")
+//    implementation("org.springdoc:springdoc-openapi-data-rest:1.6.7")
+
+//    implementation("org.springdoc:springdoc-openapi-ui:1.6.13")
+//    implementation("org.springdoc:springdoc-openapi-data-rest:1.6.13")
 }

src/main/java/com/example/enumproblemexample/FooBar.java

@@ -1,14 +1,38 @@
 package com.example.enumproblemexample;
 
-import io.swagger.v3.oas.annotations.media.Schema;
+import javax.annotation.Generated;
 
-@Schema(type = "String", allowableValues = { "foo", "bar" })
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen")
 public enum FooBar {
-    FOO,
-    BAR;
+    FOO("foo"),
+    BAR("bar");
+
+    private String value;
+
+    FooBar(String value) {
+        this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+        return value;
+    }
+
+    @Override
+    public String toString() {
+        return String.valueOf(value);
+    }
 
-    public String toLowerCase() {
-        var lower = this.name().toLowerCase();
-        return lower.replace("_", "-");
+    @JsonCreator
+    public static FooBar fromValue(String value) {
+        for (FooBar b : FooBar.values()) {
+            if (b.value.equals(value)) {
+                return b;
+            }
+        }
+        throw new IllegalArgumentException("Unexpected value '" + value + "'");
     }
 }

src/main/java/com/example/enumproblemexample/FooBarConverter.java

@@ -8,11 +8,7 @@ public class FooBarConverter implements Converter<String, FooBar> {
 
   @Override
   public FooBar convert(String source) {
-    return FooBar.valueOf(fooBarToUpperCase(source));
+    return FooBar.fromValue(source);
   }
 
-  private String fooBarToUpperCase(String source) {
-    var upper = source.toUpperCase();
-    return upper.replace("-", "_");
-  }
 }