#453 - Compile error with nested enum type not imported in generated server code (#455)

e.g.
```
public class Foo {
    public enum NestedEnum {
        A, B, C
    }
}
```

```
@controller
class TestController {
    @post
    void foo(Foo.NestedEnum value) {
        System.out.println(value);
    }
```

Author: rbygrave

http-generator-core/src/main/java/io/avaje/http/generator/core/TypeMap.java

@@ -316,12 +316,12 @@ static class EnumHandler extends ObjectHandler {
 
     @Override
     public String toMethod() {
-      return "(" + type.shortType() + ") toEnum(" + type.shortType() + ".class, ";
+      return "(" + type.shortTypeNested() + ") toEnum(" + type.shortTypeNested() + ".class, ";
     }
 
     @Override
     public String asMethod() {
-      return "(" + type.shortType() + ") asEnum(" + type.shortType() + ".class, ";
+      return "(" + type.shortTypeNested() + ") asEnum(" + type.shortTypeNested() + ".class, ";
     }
   }
 

http-generator-core/src/main/java/io/avaje/http/generator/core/UType.java

@@ -31,6 +31,13 @@ static UType parse(String type) {
    */
   String shortType();
 
+  /**
+   * Return the short type taking nested type into account.
+   */
+  default String shortTypeNested() {
+    return shortType();
+  }
+
   /**
    * Return the short name.
    */
@@ -152,6 +159,11 @@ public String shortType() {
       return Util.shortName(rawType);
     }
 
+    @Override
+    public String shortTypeNested() {
+      return Util.shortName(rawType, true);
+    }
+
     @Override
     public String shortName() {
       return Util.initLower(shortType()).replace(".", "$");

http-generator-core/src/test/java/io/avaje/http/generator/core/UTypeTest.java

@@ -2,6 +2,7 @@
 
 import org.junit.jupiter.api.Test;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.jupiter.api.Assertions.*;
 
 class UTypeTest {
@@ -17,4 +18,12 @@ void isJavaLangPackage_expect_false() {
     assertFalse(UType.isJavaLangPackage("java.lang.other.Foo"));
     assertFalse(UType.isJavaLangPackage("not.lang.Foo"));
   }
+
+  @Test
+  void parseNestedEnum() {
+    UType uType = UType.parse("my.pack.Foo.NestedEnum");
+    assertThat(uType.mainType()).isEqualTo("my.pack.Foo.NestedEnum");
+    assertThat(uType.shortType()).isEqualTo("Foo.NestedEnum");
+    assertThat(uType.shortTypeNested()).isEqualTo("NestedEnum");
+  }
 }

tests/test-javalin-jsonb/src/main/java/org/example/myapp/web/HelloController.java

@@ -25,6 +25,7 @@
 import io.javalin.http.Context;
 import io.swagger.v3.oas.annotations.Hidden;
 import jakarta.inject.Inject;
+import org.example.myapp.web.other.Foo;
 
 /**
  * Hello resource manager.
@@ -183,4 +184,10 @@ String controlStatusCode(Context ctx) {
     ctx.status(201);
     return "controlStatusCode";
   }
+
+  @Produces(value = "text/plain")
+  @Get("takesNestedEnum")
+  String takesNestedEnum(Foo.NestedEnum myEnum) {
+    return "takesNestedEnum-" + myEnum;
+  }
 }

tests/test-javalin-jsonb/src/main/java/org/example/myapp/web/other/Foo.java

@@ -0,0 +1,7 @@
+package org.example.myapp.web.other;
+
+public class Foo {
+  public enum NestedEnum {
+    A, B, C
+  }
+}

tests/test-javalin-jsonb/src/main/resources/public/openapi.json

@@ -646,6 +646,41 @@
 				}
 			}
 		},
+		"/hello/takesNestedEnum" : {
+			"get" : {
+				"tags" : [
+					
+				],
+				"summary" : "",
+				"description" : "",
+				"parameters" : [
+					{
+						"name" : "myEnum",
+						"in" : "query",
+						"schema" : {
+							"type" : "string",
+							"enum" : [
+								"A",
+								"B",
+								"C"
+							]
+						}
+					}
+				],
+				"responses" : {
+					"200" : {
+						"description" : "",
+						"content" : {
+							"text/plain" : {
+								"schema" : {
+									"type" : "string"
+								}
+							}
+						}
+					}
+				}
+			}
+		},
 		"/hello/withMatrix/{year_segment}/{other}" : {
 			"get" : {
 				"tags" : [