From 99d181570e90f1edecf6ab0c64ef5c42f92c2175 Mon Sep 17 00:00:00 2001
From: Laird Nelson <laird.nelson@oracle.com>
Date: Fri, 17 Nov 2023 09:46:07 -0800
Subject: [PATCH] Adds support for Provider-specializing injection points in
 OciExtension (#8028)

Signed-off-by: Laird Nelson <laird.nelson@oracle.com>
---
 .../oci/sdk/cdi/etc/spotbugs/exclude.xml      |   4 +-
 .../oci/sdk/cdi/OciExtension.java             |  87 +++++++------
 .../TestProcessProviderInjectionPoint.java    | 122 ++++++++++++++++++
 3 files changed, 173 insertions(+), 40 deletions(-)
 create mode 100644 integrations/oci/sdk/cdi/src/test/java/io/helidon/integrations/oci/sdk/cdi/TestProcessProviderInjectionPoint.java

diff --git a/integrations/oci/sdk/cdi/etc/spotbugs/exclude.xml b/integrations/oci/sdk/cdi/etc/spotbugs/exclude.xml
index 4f22fb5dd01..20b01b2b5e2 100644
--- a/integrations/oci/sdk/cdi/etc/spotbugs/exclude.xml
+++ b/integrations/oci/sdk/cdi/etc/spotbugs/exclude.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (c) 2022 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.
@@ -23,7 +23,7 @@
                             https://raw.githubusercontent.com/spotbugs/spotbugs/3.1.0/spotbugs/etc/findbugsfilter.xsd">
     <Match>
         <Class name="io.helidon.integrations.oci.sdk.cdi.OciExtension" />
-        <Bug pattern="DMI_BLOCKING_METHODS_ON_URL, REDOS" />
+        <Bug pattern="DMI_BLOCKING_METHODS_ON_URL, REDOS, UPM_UNCALLED_PRIVATE_METHOD" />
     </Match>
     <Match>
         <Class name="io.helidon.integrations.oci.sdk.cdi.OciExtension$EndpointAdjuster" />
diff --git a/integrations/oci/sdk/cdi/src/main/java/io/helidon/integrations/oci/sdk/cdi/OciExtension.java b/integrations/oci/sdk/cdi/src/main/java/io/helidon/integrations/oci/sdk/cdi/OciExtension.java
index 43d9b82f002..4c9f87d6750 100644
--- a/integrations/oci/sdk/cdi/src/main/java/io/helidon/integrations/oci/sdk/cdi/OciExtension.java
+++ b/integrations/oci/sdk/cdi/src/main/java/io/helidon/integrations/oci/sdk/cdi/OciExtension.java
@@ -58,6 +58,7 @@
 import javax.enterprise.inject.spi.InjectionPoint;
 import javax.enterprise.inject.spi.ProcessInjectionPoint;
 import javax.enterprise.util.TypeLiteral;
+import javax.inject.Provider;
 import javax.inject.Singleton;
 import javax.ws.rs.Priorities;
 import javax.ws.rs.client.Client;
@@ -630,37 +631,16 @@ private void beforeBeanDiscovery(@Observes BeforeBeanDiscovery event) {
 
     private void processInjectionPoint(@Observes ProcessInjectionPoint<?, ?> event) {
         InjectionPoint ip = event.getInjectionPoint();
-        Type baseType = ip.getAnnotated().getBaseType();
-        if (!(baseType instanceof Class)) {
-            // Optimization: all OCI constructs we're interested in
-            // are non-generic classes (and not therefore
-            // ParameterizedTypes or GenericArrayTypes).
-            return;
-        }
-        Class<?> baseClass = (Class<?>) baseType;
-        String baseClassName = baseClass.getName();
-        if (!baseClassName.startsWith(OCI_PACKAGE_PREFIX)) {
-            // Optimization: the set of classes we're interested in is
-            // a subset of general OCI-related classes.
-            return;
-        }
-        Set<Annotation> qualifiers = ip.getQualifiers();
-        if (AbstractAuthenticationDetailsProvider.class.isAssignableFrom(baseClass)
-            || AdpSelectionStrategy.builderClasses().contains(baseClass)) {
-            // Use an "empty" ServiceTaqs as an indicator of demand
-            // for some kind of AbstractAuthenticationDetailsProvider
-            // (or a relevant builder).
-            this.serviceTaqs.add(new ServiceTaqs(qualifiers.toArray(EMPTY_ANNOTATION_ARRAY)));
-            return;
-        }
-        Matcher m = SERVICE_CLIENT_CLASS_NAME_SUBSTRING_PATTERN.matcher(baseClassName.substring(OCI_PACKAGE_PREFIX.length()));
-        if (!m.matches() || this.isVetoed(baseClass)) {
-            return;
-        }
-        this.processServiceClientInjectionPoint(event::addDefinitionError,
-                                                baseClass,
-                                                qualifiers,
-                                                OCI_PACKAGE_PREFIX + m.group(1));
+        processInjectionPoint(ip.getAnnotated().getBaseType(),
+                              ip.getQualifiers(),
+                              event::addDefinitionError);
+    }
+
+    private void processProviderInjectionPoint(@Observes ProcessInjectionPoint<?, ? extends Provider<?>> event) {
+        InjectionPoint ip = event.getInjectionPoint();
+        processInjectionPoint(((ParameterizedType) ip.getAnnotated().getBaseType()).getActualTypeArguments()[0],
+                              ip.getQualifiers(),
+                              event::addDefinitionError);
     }
 
     private void afterBeanDiscovery(@Observes AfterBeanDiscovery event, BeanManager bm) {
@@ -731,8 +711,39 @@ private boolean isVetoed(Class<?> c) {
         return false;
     }
 
+    private void processInjectionPoint(Type type,
+                                       Set<Annotation> qualifiers,
+                                       Consumer<? super ClassNotFoundException> errorHandler) {
+        if (!(type instanceof Class)) {
+            // Optimization: all OCI constructs we're interested in are non-generic classes (and not therefore
+            // ParameterizedTypes or GenericArrayTypes).
+            return;
+        }
+        Class<?> c = (Class<?>) type;
+        String className = c.getName();
+        if (!className.startsWith(OCI_PACKAGE_PREFIX)) {
+            // Optimization: the set of classes we're interested in is a subset of general OCI-related classes.
+            return;
+        }
+        if (AbstractAuthenticationDetailsProvider.class.isAssignableFrom(c)
+            || AdpSelectionStrategy.builderClasses().contains(c)) {
+            // Register an "empty" ServiceTaqs as an indicator of demand for some kind of
+            // AbstractAuthenticationDetailsProvider (or a relevant builder).
+            this.serviceTaqs.add(new ServiceTaqs(qualifiers.toArray(EMPTY_ANNOTATION_ARRAY)));
+            return;
+        }
+        Matcher m = SERVICE_CLIENT_CLASS_NAME_SUBSTRING_PATTERN.matcher(className.substring(OCI_PACKAGE_PREFIX.length()));
+        if (!m.matches() || this.isVetoed(c)) {
+            return;
+        }
+        this.processServiceClientInjectionPoint(errorHandler,
+                                                c,
+                                                qualifiers,
+                                                OCI_PACKAGE_PREFIX + m.group(1));
+    }
+
     private void processServiceClientInjectionPoint(Consumer<? super ClassNotFoundException> errorHandler,
-                                                    Class<?> baseClass,
+                                                    Class<?> c,
                                                     Set<Annotation> qualifiers,
                                                     String serviceInterfaceName) {
         Annotation[] qualifiersArray = qualifiers.toArray(EMPTY_ANNOTATION_ARRAY);
@@ -742,12 +753,12 @@ private void processServiceClientInjectionPoint(Consumer<? super ClassNotFoundEx
         //   ....example.Example
         //   ....example.ExampleClient
         //   ....example.ExampleClient$Builder
-        Class<?> serviceInterfaceClass = toClassUnresolved(errorHandler, baseClass, serviceInterfaceName, lenient);
+        Class<?> serviceInterfaceClass = toClassUnresolved(errorHandler, c, serviceInterfaceName, lenient);
         if (serviceInterfaceClass != null && serviceInterfaceClass.isInterface()) {
             String serviceClient = serviceInterfaceName + "Client";
-            Class<?> serviceClientClass = toClassUnresolved(errorHandler, baseClass, serviceClient, lenient);
+            Class<?> serviceClientClass = toClassUnresolved(errorHandler, c, serviceClient, lenient);
             if (serviceClientClass != null && serviceInterfaceClass.isAssignableFrom(serviceClientClass)) {
-                Class<?> serviceClientBuilderClass = toClassUnresolved(errorHandler, baseClass, serviceClient + "$Builder", true);
+                Class<?> serviceClientBuilderClass = toClassUnresolved(errorHandler, c, serviceClient + "$Builder", true);
                 if (serviceClientBuilderClass == null) {
                     serviceClientBuilderClass = toClassUnresolved(errorHandler, serviceClient + "Builder", lenient);
                 }
@@ -771,14 +782,14 @@ private void processServiceClientInjectionPoint(Consumer<? super ClassNotFoundEx
         //   ....example.ExampleAsyncClient
         //   ....example.ExampleAsyncClient$Builder
         String serviceAsyncInterface = serviceInterfaceName + "Async";
-        Class<?> serviceAsyncInterfaceClass = toClassUnresolved(errorHandler, baseClass, serviceAsyncInterface, lenient);
+        Class<?> serviceAsyncInterfaceClass = toClassUnresolved(errorHandler, c, serviceAsyncInterface, lenient);
         if (serviceAsyncInterfaceClass != null && serviceAsyncInterfaceClass.isInterface()) {
             String serviceAsyncClient = serviceAsyncInterface + "Client";
-            Class<?> serviceAsyncClientClass = toClassUnresolved(errorHandler, baseClass, serviceAsyncClient, lenient);
+            Class<?> serviceAsyncClientClass = toClassUnresolved(errorHandler, c, serviceAsyncClient, lenient);
             if (serviceAsyncClientClass != null
                 && serviceAsyncInterfaceClass.isAssignableFrom(serviceAsyncClientClass)) {
                 Class<?> serviceAsyncClientBuilderClass =
-                    toClassUnresolved(errorHandler, baseClass, serviceAsyncClient + "$Builder", true);
+                    toClassUnresolved(errorHandler, c, serviceAsyncClient + "$Builder", true);
                 if (serviceAsyncClientBuilderClass == null) {
                     serviceAsyncClientBuilderClass = toClassUnresolved(errorHandler, serviceAsyncClient + "Builder", lenient);
                 }
diff --git a/integrations/oci/sdk/cdi/src/test/java/io/helidon/integrations/oci/sdk/cdi/TestProcessProviderInjectionPoint.java b/integrations/oci/sdk/cdi/src/test/java/io/helidon/integrations/oci/sdk/cdi/TestProcessProviderInjectionPoint.java
new file mode 100644
index 00000000000..dd88181aec1
--- /dev/null
+++ b/integrations/oci/sdk/cdi/src/test/java/io/helidon/integrations/oci/sdk/cdi/TestProcessProviderInjectionPoint.java
@@ -0,0 +1,122 @@
+/*
+ * 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.integrations.oci.sdk.cdi;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.net.InetAddress;
+
+import javax.enterprise.context.Dependent;
+import javax.inject.Inject;
+import javax.inject.Provider;
+
+import io.helidon.microprofile.config.ConfigCdiExtension;
+import io.helidon.microprofile.tests.junit5.AddBean;
+import io.helidon.microprofile.tests.junit5.AddExtension;
+import io.helidon.microprofile.tests.junit5.DisableDiscovery;
+import io.helidon.microprofile.tests.junit5.HelidonTest;
+
+import com.oracle.bmc.ConfigFileReader;
+import com.oracle.bmc.ailanguage.AIServiceLanguage;
+import org.junit.jupiter.api.Test;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.not;
+import static org.hamcrest.CoreMatchers.nullValue;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
+
+@AddBean(TestProcessProviderInjectionPoint.ExampleBean.class)
+@AddExtension(ConfigCdiExtension.class)
+@AddExtension(OciExtension.class)
+@DisableDiscovery
+@HelidonTest
+class TestProcessProviderInjectionPoint {
+
+
+    /*
+     * Instance fields.
+     */
+
+
+    @Inject
+    private Provider<ExampleBean> exampleBeanProvider;
+
+
+    /*
+     * Test methods.
+     */
+
+
+    @Test
+    void testProcessProviderInjectionPoint() throws IOException {
+        // Don't run this test if there's NO ADP anywhere; it will show up as "skipped" in the test run.
+        assumeTrue(imdsAvailable() || configFileExists());
+
+        assertThat(this.exampleBeanProvider.get(), is(not(nullValue())));
+    }
+
+
+    /*
+     * Static methods.
+     */
+
+
+    private static final boolean configFileExists() throws IOException {
+        try {
+            return
+                ConfigFileReader.parse(System.getProperty("oci.config.file", "~/.oci/config"),
+                                       System.getProperty("oci.auth.profile")) != null;
+        } catch (final FileNotFoundException ignored) {
+            return false;
+        }
+    }
+
+    private static final boolean imdsAvailable() {
+        try {
+            return InetAddress.getByName(System.getProperty("oci.imds.hostname", "169.254.169.254"))
+                .isReachable(Integer.getInteger("oci.imds.timeout", 100).intValue());
+        } catch (final IOException ignored) {
+            return false;
+        }
+    }
+
+
+    /*
+     * Inner and nested classes.
+     */
+
+
+    @Dependent
+    static class ExampleBean {
+
+        // Required by the CDI specification.
+        @Deprecated // For CDI use only.
+        ExampleBean() {
+            super();
+        }
+
+        @Inject
+        private ExampleBean(Provider<AIServiceLanguage> p) {
+            super();
+            assertThat(p, is(not(nullValue())));
+            assertThat(p.get(), is(not(nullValue())));
+        }
+
+    }
+
+}