4.x - OpenAPI updates (helidon-io#7669)

* OpenAPI updates.

- Minimalistic SE OpenAPI support with SPI to implement the MicroProfile support and OpenAPI UI
- Make openapi a multi-module with two sub-modules: openapi and openapi-ui
- Add openapi/tests and move helidon-iogh-5792 from tests/integration
  - Re-enabled test,  make it strictly a test (not an app) and use version.lib.snakeyaml to override the SnakeYAML version
- Created OpenApiFormat to formalize what was before OpenApiFeature.OpenAPIMediaType
- Microprofile OpenAPI refactorings:
  - MPOpenAPIBuilder into FilteredIndexViewsBuilder as a utility to create List<FilteredIndexView>
  - MpOpenApiManager implements OpenApiManager using SmallRye OpenAPI (what was before in MpOpenApiFeature
  - Prefix utility classes with OpenApi:
    - ParserHelper -> OpenApiParser
    - Serializer -> OpenApiSerializer
  - Renamed HelidonAnnotationScannerExtension to JsonpAnnotationScannerExtension to remove 'Helidon' from the class name
  - Renamed tests to use Test as a suffix instead of prefix
- Updated examples/openapi to remove the in-memory model related features (i.e. reader, filter)
- Renamed examples/microprofile/openapi-basic to examples/microprofile/openapi (to be symetrical with SE)
- Updated tests to use new testing patterns (i.e. helidon-microprofile-testing-junit5 for MP and helidon-webserver-testing-junit5 for SE)
- Generated config docs for openapi/openapi, openapi/openapi-ui, microprofile/openapi (Removed old files)

Fixes helidon-io#7247 (SE OpenAPI static file support)
Fixes helidon-io#7240 (Fix helidon-iogh-5792 integration test)
Fixes helidon-io#6130 (Port OpenAPI UI integration to 4.x)
Fixes helidon-io#7643 (OpenAPI parsing fails to handle default in some cases)
Fixes helidon-io#7668 (Routing path with optional sequence not supported)

* Update MapMatcher javadoc

* Incorporate review feedback:
- Use FQN the provide statement in openapi/openapi-ui/src/main/java/module-info.java
- Update META-INF/openapi.yml

Author: romain-grecourt

bom/pom.xml

@@ -910,6 +910,11 @@
                 <artifactId>helidon-openapi</artifactId>
                 <version>${helidon.version}</version>
             </dependency>
+            <dependency>
+                <groupId>io.helidon.openapi</groupId>
+                <artifactId>helidon-openapi-ui</artifactId>
+                <version>${helidon.version}</version>
+            </dependency>
             <dependency>
                 <groupId>io.helidon.microprofile.openapi</groupId>
                 <artifactId>helidon-microprofile-openapi</artifactId>

common/testing/junit5/src/main/java/io/helidon/common/testing/junit5/MapMatcher.java

@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2023 Oracle and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.helidon.common.testing.junit5;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import org.hamcrest.Description;
+import org.hamcrest.Matcher;
+import org.hamcrest.TypeSafeMatcher;
+
+/**
+ * Hamcrest matchers for {@link java.util.Map}.
+ */
+public final class MapMatcher {
+    private MapMatcher() {
+    }
+
+    /**
+     * A matcher that performs {@link java.util.Map} deep equality.
+     * <p>
+     * Usage example:
+     * <pre>
+     *     assertThat(actualMap, mapEqualTo(expectedMap));
+     * </pre>
+     *
+     * This method targets trees implemented using {@link java.util.Map} where values of type {@link java.util.Map}
+     * are considered tree nodes, and values of any other type are considered leaf nodes.
+     * <p>
+     * The deep-equality is performed by diffing a flat string representation of each map. If the diff yields no differences,
+     * the maps are considered deeply equal.
+     * <p>
+     * The entries are compared using strings, both keys and leaf nodes must implement {@link Object#toString()}.
+     *
+     * @param expected expected map
+     * @param <K> type of the map keys
+     * @param <V> type of the map values
+     * @return matcher validating the {@link java.util.Map} is deeply equal
+     */
+    public static <K, V> Matcher<Map<K, V>> mapEqualTo(Map<K, V> expected) {
+        return new DiffMatcher<>(expected);
+    }
+
+    private static final class DiffMatcher<K, V> extends TypeSafeMatcher<Map<K, V>> {
+
+        private final Map<K, V> expected;
+        private volatile Map<K, V> actual;
+        private volatile List<Diff> diffs;
+
+        private DiffMatcher(Map<K, V> expected) {
+            this.expected = expected;
+        }
+
+        @Override
+        protected boolean matchesSafely(Map<K, V> actual) {
+            this.actual = actual;
+            this.diffs = diffs(expected, actual);
+            return diffs.isEmpty();
+        }
+
+        @Override
+        public void describeTo(Description description) {
+            description.appendText("deep map equality");
+        }
+
+        @Override
+        protected void describeMismatchSafely(Map<K, V> item, Description mismatchDescription) {
+            List<Diff> diffs = actual == item ? this.diffs : diffs(expected, item);
+            mismatchDescription.appendText("found differences" + System.lineSeparator())
+                    .appendText(String.join(System.lineSeparator(), diffs.stream().map(Diff::toString).toList()));
+        }
+
+        private static List<Diff> diffs(Map<?, ?> left, Map<?, ?> right) {
+            List<Diff> diffs = new ArrayList<>();
+            Iterator<Map.Entry<String, String>> leftEntries = flattenEntries(left, "").iterator();
+            Iterator<Map.Entry<String, String>> rightEntries = flattenEntries(right, "").iterator();
+            while (true) {
+                boolean hasLeft = leftEntries.hasNext();
+                boolean hasRight = rightEntries.hasNext();
+                if (hasLeft && hasRight) {
+                    Map.Entry<String, String> leftEntry = leftEntries.next();
+                    Map.Entry<String, String> rightEntry = rightEntries.next();
+                    if (!leftEntry.equals(rightEntry)) {
+                        diffs.add(new Diff(leftEntry, rightEntry));
+                    }
+                } else if (hasLeft) {
+                    diffs.add(new Diff(leftEntries.next(), null));
+                } else if (hasRight) {
+                    diffs.add(new Diff(null, rightEntries.next()));
+                } else {
+                    return diffs;
+                }
+            }
+        }
+
+        private static List<Map.Entry<String, String>> flattenEntries(Map<?, ?> map, String prefix) {
+            List<Map.Entry<String, String>> result = new ArrayList<>();
+            for (Map.Entry<?, ?> entry : map.entrySet()) {
+                if (entry.getValue() instanceof Map<?, ?> node) {
+                    result.addAll(flattenEntries(node, prefix + entry.getKey() + "."));
+                } else {
+                    result.add(Map.entry(prefix + entry.getKey(), entry.getValue().toString()));
+                }
+            }
+            result.sort(Map.Entry.comparingByKey());
+            return result;
+        }
+
+        private record Diff(Map.Entry<String, String> left, Map.Entry<String, String> right) {
+
+            @Override
+            public String toString() {
+                if (left == null && right != null) {
+                    return "ADDED   >> " + right;
+                }
+                if (left != null && right == null) {
+                    return "REMOVED << " + left;
+                }
+                if (left != null) {
+                    return "ADDED   >> " + left + System.lineSeparator() + "REMOVED << " + right;
+                }
+                return "?";
+            }
+        }
+    }
+}

common/testing/junit5/src/test/java/io/helidon/common/testing/MapMatcherTest.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2023 Oracle and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.helidon.common.testing;
+
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+
+import static io.helidon.common.testing.junit5.MapMatcher.mapEqualTo;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.not;
+
+class MapMatcherTest {
+
+    @Test
+    void testIsMapEqual() {
+        assertThat(Map.of("foo", "bar"), is(mapEqualTo(Map.of("foo", "bar"))));
+        assertThat(Map.of("bar", "foo"), is(not(mapEqualTo(Map.of("foo", "bar")))));
+
+        assertThat(Map.of("foo", Map.of("bar", Map.of("bob", "alice"))),
+                   is(mapEqualTo(Map.of("foo", Map.of("bar", Map.of("bob", "alice"))))));
+
+        assertThat(Map.of("foo", Map.of("bar", Map.of("bob", "alice"))),
+                   is(not(mapEqualTo(Map.of("foo", Map.of("bar", Map.of("bob", "not-alice")))))));
+
+        assertThat(Map.of("foo", "bar", "bob", "alice"), is(mapEqualTo(Map.of("bob", "alice", "foo", "bar"))));
+    }
+}

docs/config/config_reference.adoc

@@ -28,7 +28,6 @@ The following section lists all configurable types in Helidon.
 - xref:{rootdir}/config/io_helidon_common_configurable_AllowList.adoc[AllowList (common.configurable)]
 - xref:{rootdir}/config/io_helidon_faulttolerance_Async.adoc[Async (faulttolerance)]
 - xref:{rootdir}/config/io_helidon_security_providers_oidc_common_BaseBuilder.adoc[BaseBuilder (security.providers.oidc.common)]
-- xref:{rootdir}/config/io_helidon_openapi_OpenApiUi_Builder.adoc[Builder (openapi.OpenApiUi)]
 - xref:{rootdir}/config/io_helidon_security_providers_idcs_mapper_IdcsRoleMapperProviderBase_Builder.adoc[Builder (security.providers.idcs.mapper.IdcsRoleMapperProviderBase)]
 - xref:{rootdir}/config/io_helidon_webserver_servicecommon_HelidonFeatureSupport_Builder.adoc[Builder (webserver.servicecommon.HelidonFeatureSupport)]
 - xref:{rootdir}/config/io_helidon_faulttolerance_Bulkhead.adoc[Bulkhead (faulttolerance)]
@@ -79,7 +78,8 @@ The following section lists all configurable types in Helidon.
 - xref:{rootdir}/config/io_helidon_common_configurable_ScheduledThreadPoolSupplier.adoc[ScheduledThreadPoolSupplier (common.configurable)]
 - xref:{rootdir}/config/io_helidon_metrics_api_ScopeConfig.adoc[ScopeConfig (metrics.api)]
 - xref:{rootdir}/config/io_helidon_metrics_api_ScopingConfig.adoc[ScopingConfig (metrics.api)]
-- xref:{rootdir}/config/io_helidon_openapi_SeOpenApiFeature.adoc[SeOpenApiFeature (openapi)]
+- xref:{rootdir}/config/io_helidon_openapi_OpenApiFeature.adoc[OpenApiFeature (openapi)]
+- xref:{rootdir}/config/io_helidon_openapi_ui_OpenApiUi.adoc[OpenApiUi (openapi.ui)]
 - xref:{rootdir}/config/io_helidon_security_Security.adoc[Security (security)]
 - xref:{rootdir}/config/io_helidon_security_SecurityTime.adoc[SecurityTime (security)]
 - xref:{rootdir}/config/io_helidon_microprofile_server_Server.adoc[Server (microprofile.server)]
@@ -99,3 +99,4 @@ The following section lists all configurable types in Helidon.
 - xref:{rootdir}/config/io_helidon_tracing_providers_zipkin_ZipkinTracerBuilder.adoc[ZipkinTracerBuilder (tracing.providers.zipkin)]
 - xref:{rootdir}/config/io_opentracing_Tracer.adoc[io_opentracing_Tracer]
 - xref:{rootdir}/config/org_eclipse_microprofile_config_Config.adoc[org_eclipse_microprofile_config_Config]
+- xref:{rootdir}/config/io_helidon_microprofile_openapi_MpOpenApiManagerConfig.adoc[MpOpenApiManagerConfig (microprofile.openapi)]

docs/config/io_helidon_microprofile_openapi_MpOpenApiManagerConfig.adoc

@@ -0,0 +1,52 @@
+///////////////////////////////////////////////////////////////////////////////
+
+    Copyright (c) 2023 Oracle and/or its affiliates.
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
+///////////////////////////////////////////////////////////////////////////////
+
+ifndef::rootdir[:rootdir: {docdir}/..]
+:description: Configuration of io.helidon.microprofile.openapi.MpOpenApiManagerConfig
+:keywords: helidon, config, io.helidon.microprofile.openapi.MpOpenApiManagerConfig
+:basic-table-intro: The table below lists the configuration keys that configure io.helidon.microprofile.openapi.MpOpenApiManagerConfig
+include::{rootdir}/includes/attributes.adoc[]
+
+= MpOpenApiManagerConfig (microprofile.openapi) Configuration
+
+// tag::config[]
+
+
+Type: link:{javadoc-base-url}/io.helidon.microprofile.openapi/io/helidon/microprofile/openapi/MpOpenApiManagerConfig.html[io.helidon.microprofile.openapi.MpOpenApiManagerConfig]
+
+
+
+
+== Configuration options
+
+
+
+.Optional configuration options
+[cols="3,3a,2,5a"]
+
+|===
+|key |type |default value |description
+
+|`mp.openapi.extensions.helidon.use-jaxrs-semantics` |boolean |{nbsp} |If `true` and the `jakarta.ws.rs.core.Application` class returns a non-empty set, endpoints defined by
+ other resources are not included in the OpenAPI document.
+
+ @return `true` if enabled, `false` otherwise
+
+|===
+
+// end::config[]

docs/config/io_helidon_openapi_OpenApiFeature.adoc

@@ -0,0 +1,68 @@
+///////////////////////////////////////////////////////////////////////////////
+
+    Copyright (c) 2023 Oracle and/or its affiliates.
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+
+///////////////////////////////////////////////////////////////////////////////
+
+ifndef::rootdir[:rootdir: {docdir}/..]
+:description: Configuration of io.helidon.openapi.OpenApiFeature
+:keywords: helidon, config, io.helidon.openapi.OpenApiFeature
+:basic-table-intro: The table below lists the configuration keys that configure io.helidon.openapi.OpenApiFeature
+include::{rootdir}/includes/attributes.adoc[]
+
+= OpenApiFeature (openapi) Configuration
+
+// tag::config[]
+
+
+Type: link:{javadoc-base-url}/io.helidon.openapi/io/helidon/openapi/OpenApiFeature.html[io.helidon.openapi.OpenApiFeature]
+
+
+This is a standalone configuration type, prefix from configuration root: `openapi`
+
+
+
+== Configuration options
+
+
+
+.Optional configuration options
+[cols="3,3a,2,5a"]
+
+|===
+|key |type |default value |description
+
+|`cors` |xref:{rootdir}/config/io_helidon_cors_CrossOriginConfig.adoc[CrossOriginConfig] |{nbsp} |CORS config.
+
+ @return CORS config
+|`enabled` |boolean |`true` |Sets whether the feature should be enabled.
+
+ @return `true` if enabled, `false` otherwise
+|`manager` |io.helidon.openapi.OpenApiManager (service provider interface) |{nbsp} |OpenAPI manager.
+
+ @return the OpenAPI manager
+|`services` |io.helidon.openapi.OpenApiService[] (service provider interface) |{nbsp} |OpenAPI services.
+
+ @return the OpenAPI services
+|`static-file` |string |{nbsp} |Path of the static OpenAPI document file. Default types are `json`, `yaml`, and `yml`.
+
+ @return location of the static OpenAPI document file
+|`web-context` |string |`/openapi` |Web context path for the OpenAPI endpoint.
+
+ @return webContext to use
+
+|===
+
+// end::config[]

docs/config/io_helidon_openapi_OpenApiUi_Builder.adoc

@@ -1,6 +1,6 @@
 ///////////////////////////////////////////////////////////////////////////////
 
-    Copyright (c) 2023 Oracle and/or its affiliates.
+    Copyright (c) 2022, 2023 Oracle and/or its affiliates.
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
@@ -17,17 +17,17 @@
 ///////////////////////////////////////////////////////////////////////////////
 
 ifndef::rootdir[:rootdir: {docdir}/..]
-:description: Configuration of io.helidon.openapi.OpenApiUi.Builder
-:keywords: helidon, config, io.helidon.openapi.OpenApiUi.Builder
-:basic-table-intro: The table below lists the configuration keys that configure io.helidon.openapi.OpenApiUi.Builder
+:description: Configuration of io.helidon.openapi.OpenApiUi
+:keywords: helidon, config, io.helidon.openapi.OpenApiUi
+:basic-table-intro: The table below lists the configuration keys that configure io.helidon.openapi.OpenApiUi
 include::{rootdir}/includes/attributes.adoc[]
 
-= Builder (openapi.OpenApiUi) Configuration
+= OpenApiUi (openapi) Configuration
 
 // tag::config[]
 
 
-Type: link:{javadoc-base-url}/io.helidon.openapi.OpenApiUi/io/helidon/openapi/OpenApiUi/Builder.html[io.helidon.openapi.OpenApiUi.Builder]
+Type: link:{javadoc-base-url}/io.helidon.openapi/io/helidon/openapi/OpenApiUi.html[io.helidon.openapi.OpenApiUi]
 
 
 [source,text]
@@ -49,7 +49,7 @@ ui
 |key |type |default value |description
 
 |`enabled` |boolean |`true` |Sets whether the UI should be enabled.
-|`options` |Map<string, string> |{nbsp} |Merges implementation-specific UI options.
+|`options` |Map<string, string> |{nbsp} |Sets implementation-specific UI options.
 |`web-context` |string |{nbsp} |web context (path) where the UI will respond
 
 |===