Provide a @ConfigDocEnum annotation to enforce hyphenation of enum

Also refactor things a bit to centralize the handling of the common
annotations.

Fixes #42514

Author: gsmet

core/processor/src/main/java/io/quarkus/annotation/processor/documentation/config/discovery/DiscoveryConfigProperty.java

@@ -15,12 +15,13 @@ public class DiscoveryConfigProperty {
     private final boolean unnamedMapKey;
     private final ResolvedType type;
     private final boolean converted;
+    private final boolean enforceHyphenateEnumValue;
     private final boolean section;
     private final boolean sectionGenerated;
 
     public DiscoveryConfigProperty(String path, String sourceClass, String sourceName, String defaultValue,
             String defaultValueForDoc, boolean deprecated, String mapKey, boolean unnamedMapKey,
-            ResolvedType type, boolean converted,
+            ResolvedType type, boolean converted, boolean enforceHyphenateEnumValue,
             boolean section, boolean sectionGenerated) {
         this.path = path;
         this.sourceClass = sourceClass;
@@ -32,6 +33,7 @@ public DiscoveryConfigProperty(String path, String sourceClass, String sourceNam
         this.unnamedMapKey = unnamedMapKey;
         this.type = type;
         this.converted = converted;
+        this.enforceHyphenateEnumValue = enforceHyphenateEnumValue;
         this.section = section;
         this.sectionGenerated = sectionGenerated;
     }
@@ -76,6 +78,10 @@ public boolean isConverted() {
         return converted;
     }
 
+    public boolean isEnforceHyphenateEnumValue() {
+        return enforceHyphenateEnumValue;
+    }
+
     public boolean isSection() {
         return section;
     }
@@ -132,6 +138,7 @@ public static class Builder {
         private String mapKey;
         private boolean unnamedMapKey = false;
         private boolean converted = false;
+        private boolean enforceHyphenateEnumValue = false;
         private boolean section = false;
         private boolean sectionGenerated = false;
 
@@ -176,6 +183,11 @@ public Builder converted() {
             return this;
         }
 
+        public Builder enforceHyphenateEnumValues() {
+            this.enforceHyphenateEnumValue = true;
+            return this;
+        }
+
         public Builder section(boolean generated) {
             this.section = true;
             this.sectionGenerated = generated;
@@ -191,7 +203,7 @@ public DiscoveryConfigProperty build() {
             }
 
             return new DiscoveryConfigProperty(name, sourceClass, sourceName, defaultValue, defaultValueForDoc, deprecated,
-                    mapKey, unnamedMapKey, type, converted, section, sectionGenerated);
+                    mapKey, unnamedMapKey, type, converted, enforceHyphenateEnumValue, section, sectionGenerated);
         }
     }
 }

core/processor/src/main/java/io/quarkus/annotation/processor/documentation/config/resolver/ConfigResolver.java

@@ -153,7 +153,8 @@ private void resolveProperty(ConfigRoot configRoot, Map<String, ConfigSection> e
             String typeSimplifiedName = discoveryConfigProperty.getType().simplifiedName();
 
             // if the property has a converter, we don't hyphenate the values (per historical rules, not exactly sure of the reason)
-            boolean hyphenateEnumValues = !discoveryConfigProperty.isConverted();
+            boolean hyphenateEnumValues = discoveryConfigProperty.isEnforceHyphenateEnumValue() ||
+                    !discoveryConfigProperty.isConverted();
 
             String defaultValue = getDefaultValue(discoveryConfigProperty.getDefaultValue(),
                     discoveryConfigProperty.getDefaultValueForDoc(), discoveryConfigProperty.getType(), hyphenateEnumValues);

core/processor/src/main/java/io/quarkus/annotation/processor/documentation/config/scanner/AbstractConfigListener.java

@@ -10,8 +10,10 @@
 import javax.lang.model.element.TypeElement;
 
 import io.quarkus.annotation.processor.documentation.config.discovery.DiscoveryConfigGroup;
+import io.quarkus.annotation.processor.documentation.config.discovery.DiscoveryConfigProperty;
 import io.quarkus.annotation.processor.documentation.config.discovery.EnumDefinition;
 import io.quarkus.annotation.processor.documentation.config.discovery.EnumDefinition.EnumConstant;
+import io.quarkus.annotation.processor.documentation.config.discovery.ResolvedType;
 import io.quarkus.annotation.processor.documentation.config.util.Types;
 import io.quarkus.annotation.processor.util.Config;
 import io.quarkus.annotation.processor.util.Utils;
@@ -63,4 +65,28 @@ public void onResolvedEnum(TypeElement enumTypeElement) {
                 enumConstants);
         configCollector.addResolvedEnum(enumDefinition);
     }
+
+    protected void handleCommonPropertyAnnotations(DiscoveryConfigProperty.Builder builder,
+            Map<String, AnnotationMirror> propertyAnnotations, ResolvedType resolvedType, String sourceName) {
+
+        AnnotationMirror configDocSectionAnnotation = propertyAnnotations.get(Types.ANNOTATION_CONFIG_DOC_SECTION);
+        if (configDocSectionAnnotation != null) {
+            Boolean sectionGenerated = (Boolean) utils.element().getAnnotationValues(configDocSectionAnnotation)
+                    .get("generated");
+            if (sectionGenerated != null && sectionGenerated) {
+                builder.section(true);
+            } else {
+                builder.section(false);
+            }
+        }
+
+        AnnotationMirror configDocEnum = propertyAnnotations.get(Types.ANNOTATION_CONFIG_DOC_ENUM);
+        if (configDocEnum != null) {
+            Boolean enforceHyphenateValues = (Boolean) utils.element().getAnnotationValues(configDocEnum)
+                    .get("enforceHyphenateValues");
+            if (enforceHyphenateValues != null && enforceHyphenateValues) {
+                builder.enforceHyphenateEnumValues();
+            }
+        }
+    }
 }

core/processor/src/main/java/io/quarkus/annotation/processor/documentation/config/scanner/ConfigMappingListener.java

@@ -174,16 +174,7 @@ public void onEnclosedMethod(DiscoveryRootElement discoveryRootElement, TypeElem
             builder.converted();
         }
 
-        AnnotationMirror configDocSectionAnnotation = methodAnnotations.get(Types.ANNOTATION_CONFIG_DOC_SECTION);
-        if (configDocSectionAnnotation != null) {
-            Boolean sectionGenerated = (Boolean) utils.element().getAnnotationValues(configDocSectionAnnotation)
-                    .get("generated");
-            if (sectionGenerated != null && sectionGenerated) {
-                builder.section(true);
-            } else {
-                builder.section(false);
-            }
-        }
+        handleCommonPropertyAnnotations(builder, methodAnnotations, resolvedType, sourceName);
 
         discoveryRootElement.addProperty(builder.build());
     }

core/processor/src/main/java/io/quarkus/annotation/processor/documentation/config/scanner/LegacyConfigRootListener.java

@@ -176,16 +176,7 @@ public void onEnclosedField(DiscoveryRootElement discoveryRootElement, TypeEleme
             builder.converted();
         }
 
-        AnnotationMirror configDocSectionAnnotation = fieldAnnotations.get(Types.ANNOTATION_CONFIG_DOC_SECTION);
-        if (configDocSectionAnnotation != null) {
-            Boolean sectionGenerated = (Boolean) utils.element().getAnnotationValues(configDocSectionAnnotation)
-                    .get("generated");
-            if (sectionGenerated != null && sectionGenerated) {
-                builder.section(true);
-            } else {
-                builder.section(false);
-            }
-        }
+        handleCommonPropertyAnnotations(builder, fieldAnnotations, resolvedType, sourceName);
 
         discoveryRootElement.addProperty(builder.build());
     }

core/processor/src/main/java/io/quarkus/annotation/processor/documentation/config/util/Types.java

@@ -31,6 +31,7 @@ private Types() {
     public static final String ANNOTATION_CONFIG_DOC_DEFAULT = "io.quarkus.runtime.annotations.ConfigDocDefault";
     public static final String ANNOTATION_CONFIG_DOC_FILE_NAME = "io.quarkus.runtime.annotations.ConfigDocFilename";
     public static final String ANNOTATION_CONFIG_DOC_PREFIX = "io.quarkus.runtime.annotations.ConfigDocPrefix";
+    public static final String ANNOTATION_CONFIG_DOC_ENUM = "io.quarkus.runtime.annotations.ConfigDocEnum";
 
     public static final String ANNOTATION_CONFIG_WITH_CONVERTER = "io.smallrye.config.WithConverter";
     public static final String ANNOTATION_CONFIG_WITH_NAME = "io.smallrye.config.WithName";

core/runtime/src/main/java/io/quarkus/runtime/annotations/ConfigDocEnum.java

@@ -0,0 +1,24 @@
+package io.quarkus.runtime.annotations;
+
+import static java.lang.annotation.ElementType.FIELD;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+/**
+ * Provides a way to configure how an enum is handled.
+ */
+@Retention(RUNTIME)
+@Target({ FIELD, METHOD })
+@Documented
+public @interface ConfigDocEnum {
+
+    /**
+     * This can be used to enforce hyphenating the enum values even if a converter is present.
+     */
+    boolean enforceHyphenateValues() default false;
+
+}