feat: permit @setting in ConfigurationExtension (#229)

* feat: permit @setting in ConfigurationExtension

* dependencies

DEPENDENCIES

@@ -46,9 +46,12 @@ maven/mavencentral/commons-collections/commons-collections/3.2.2, Apache-2.0, ap
 maven/mavencentral/commons-io/commons-io/2.4, Apache-1.1, approved, CQ9218
 maven/mavencentral/commons-io/commons-io/2.6, Apache-2.0, approved, CQ19090
 maven/mavencentral/commons-logging/commons-logging/1.2, Apache-2.0, approved, CQ10162
+maven/mavencentral/dev.failsafe/failsafe/3.3.2, Apache-2.0, approved, #9268
 maven/mavencentral/gradle.plugin.org.gradle.crypto/checksum/1.4.0, Apache-2.0, approved, #9667
 maven/mavencentral/info.picocli/picocli/4.7.5, Apache-2.0, approved, #4365
 maven/mavencentral/io.github.gradle-nexus/publish-plugin/1.3.0, Apache-2.0 AND (Apache-2.0 AND BSD-3-Clause AND CPL-1.0 AND LGPL-2.1-only AND LGPL-2.1-or-later AND MIT AND LicenseRef-Permission-Notice), approved, #10359
+maven/mavencentral/io.opentelemetry/opentelemetry-api/1.32.0, Apache-2.0, approved, #11682
+maven/mavencentral/io.opentelemetry/opentelemetry-context/1.32.0, Apache-2.0, approved, #11683
 maven/mavencentral/io.swagger.core.v3/swagger-annotations/2.1.5, Apache-2.0, approved, clearlydefined
 maven/mavencentral/io.swagger.core.v3/swagger-core/2.1.5, Apache-2.0, approved, clearlydefined
 maven/mavencentral/io.swagger.core.v3/swagger-gradle-plugin/2.2.15, Apache-2.0 AND MIT, approved, #10356
@@ -110,6 +113,8 @@ maven/mavencentral/org.codehaus.plexus/plexus-container-default/2.1.0, Apache-2.
 maven/mavencentral/org.codehaus.plexus/plexus-utils/3.1.1, , approved, CQ16492
 maven/mavencentral/org.codehaus.plexus/plexus-utils/3.3.0, , approved, CQ21066
 maven/mavencentral/org.eclipse.edc/autodoc-processor/0.5.2-SNAPSHOT, Apache-2.0, approved, technology.edc
+maven/mavencentral/org.eclipse.edc/core-spi/0.5.2-SNAPSHOT, Apache-2.0, approved, technology.edc
+maven/mavencentral/org.eclipse.edc/policy-model/0.5.2-SNAPSHOT, Apache-2.0, approved, technology.edc
 maven/mavencentral/org.eclipse.edc/runtime-metamodel/0.5.2-SNAPSHOT, Apache-2.0, approved, technology.edc
 maven/mavencentral/org.glassfish.web/javax.el/2.2.6, CDDL-1.0 OR GPL-2.0-only WITH Classpath-exception-2.0, approved, #1654
 maven/mavencentral/org.hibernate.validator/hibernate-validator-annotation-processor/6.0.2.Final, Apache-2.0 AND LicenseRef-Public-Domain, approved, CQ20221

gradle/libs.versions.toml

@@ -14,6 +14,7 @@ mockito = "5.11.0"
 assertj-core = { module = "org.assertj:assertj-core", version.ref = "assertj" }
 checkstyle = { module = "com.puppycrawl.tools:checkstyle", version.ref = "checkstyle" }
 edc-runtime-metamodel = { module = "org.eclipse.edc:runtime-metamodel", version.ref = "edc" }
+edc-core-spi = { module = "org.eclipse.edc:core-spi", version.ref = "edc" }
 jackson-annotations = { module = "com.fasterxml.jackson.core:jackson-annotations", version.ref = "jackson" }
 jackson-core = { module = "com.fasterxml.jackson.core:jackson-core", version.ref = "jackson" }
 jackson-databind = { module = "com.fasterxml.jackson.core:jackson-databind", version.ref = "jackson" }

plugins/autodoc/autodoc-processor/build.gradle.kts

@@ -17,4 +17,6 @@ plugins {
 
 dependencies {
     api(libs.edc.runtime.metamodel)
+
+    testImplementation(libs.edc.core.spi)
 }

plugins/autodoc/autodoc-processor/src/main/java/org/eclipse/edc/plugins/autodoc/core/processor/introspection/ModuleIntrospector.java

@@ -46,6 +46,7 @@
  */
 public class ModuleIntrospector {
     private static final String SERVICE_EXTENSION_NAME = "org.eclipse.edc.spi.system.ServiceExtension";
+    private static final String SYSTEM_EXTENSION_NAME = "org.eclipse.edc.spi.system.SystemExtension";
     private final Elements elementUtils;
     private final Types typeUtils;
     private final ProcessingEnvironment processingEnv;
@@ -56,7 +57,6 @@ public ModuleIntrospector(ProcessingEnvironment processingEnv) {
         this.typeUtils = processingEnv.getTypeUtils();
     }
 
-
     public List<String> getCategories(RoundEnvironment environment) {
         var extensionElement = environment.getElementsAnnotatedWith(Spi.class).iterator().next();
         return attributeStringValues("categories", mirrorFor(Spi.class, extensionElement), elementUtils);
@@ -96,7 +96,7 @@ public Set<Element> getExtensionElements(RoundEnvironment environment) {
         var settingsSymbols = environment.getElementsAnnotatedWith(Setting.class).stream()
                 .peek(setting -> {
                     var enclosingElement = setting.getEnclosingElement().asType();
-                    var serviceExtensionType = typeUtils.erasure(elementUtils.getTypeElement(SERVICE_EXTENSION_NAME).asType());
+                    var serviceExtensionType = typeUtils.erasure(elementUtils.getTypeElement(SYSTEM_EXTENSION_NAME).asType());
                     if (!typeUtils.isAssignable(enclosingElement, serviceExtensionType)) {
                         var message = "@Setting annotation must be used inside a ServiceExtension implementation, the " +
                                 "ones defined in %s will be excluded from the autodoc manifest".formatted(enclosingElement);

plugins/autodoc/autodoc-processor/src/test/java/org/eclipse/edc/plugins/autodoc/core/processor/EdcModuleProcessorTest.java

@@ -265,6 +265,13 @@ void shouldFail_whenSettingIsDefinedInClassNotExtension() {
         });
     }
 
+    @Test
+    void shouldPass_whenSettingIsDefinedInExtensionSubclass() {
+        var task = createTask("test/ConfigurationExtensionWithSetting.java");
+
+        assertThat(task.call()).isTrue();
+    }
+
     private JavaCompiler.@NotNull CompilationTask createTask(String classPath) {
         try {
             var classes = getFiles(classPath);

plugins/autodoc/autodoc-processor/src/test/java/org/eclipse/edc/plugins/autodoc/core/processor/test/ConfigurationExtensionWithSetting.java

@@ -0,0 +1,30 @@
+/*
+ *  Copyright (c) 2024 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+ *
+ *  This program and the accompanying materials are made available under the
+ *  terms of the Apache License, Version 2.0 which is available at
+ *  https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Contributors:
+ *       Bayerische Motoren Werke Aktiengesellschaft (BMW AG) - initial API and implementation
+ *
+ */
+
+package org.eclipse.edc.plugins.autodoc.core.processor.test;
+
+import org.eclipse.edc.runtime.metamodel.annotation.Setting;
+import org.eclipse.edc.spi.system.ConfigurationExtension;
+import org.eclipse.edc.spi.system.configuration.Config;
+
+public class ConfigurationExtensionWithSetting implements ConfigurationExtension {
+
+    @Setting("Valid because this is an extension of ServiceExtension")
+    private static final String VALID_SETTING = "any";
+
+    @Override
+    public Config getConfig() {
+        return null;
+    }
+}