DeploymentDependencySelector equals and hashCode impl

(cherry picked from commit 25941ff)

independent-projects/bootstrap/maven-resolver/src/main/java/io/quarkus/bootstrap/resolver/maven/DeploymentDependencySelector.java

@@ -1,28 +1,48 @@
 package io.quarkus.bootstrap.resolver.maven;
 
+import java.util.Objects;
 import org.eclipse.aether.collection.DependencyCollectionContext;
 import org.eclipse.aether.collection.DependencySelector;
 import org.eclipse.aether.graph.Dependency;
 
-class DeploymentDependencySelector implements DependencySelector {
+final class DeploymentDependencySelector implements DependencySelector {
+
+    static DependencySelector ensureDeploymentDependencySelector(DependencySelector original) {
+        return original.getClass() == DeploymentDependencySelector.class ? original
+                : new DeploymentDependencySelector(original);
+    }
 
     private final DependencySelector delegate;
 
-    public DeploymentDependencySelector(DependencySelector delegate) {
+    DeploymentDependencySelector(DependencySelector delegate) {
         this.delegate = delegate;
     }
 
     @Override
     public boolean selectDependency(Dependency dependency) {
-        if (dependency.isOptional()) {
-            return false;
-        }
-        return delegate.selectDependency(dependency);
+        return !dependency.isOptional() && delegate.selectDependency(dependency);
     }
 
     @Override
     public DependencySelector deriveChildSelector(DependencyCollectionContext context) {
         final DependencySelector newDelegate = delegate.deriveChildSelector(context);
-        return newDelegate == null ? null : new DeploymentDependencySelector(newDelegate);
+        return newDelegate == null ? null : ensureDeploymentDependencySelector(newDelegate);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(delegate);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        DeploymentDependencySelector other = (DeploymentDependencySelector) obj;
+        return Objects.equals(delegate, other.delegate);
     }
 }

independent-projects/bootstrap/maven-resolver/src/main/java/io/quarkus/bootstrap/resolver/maven/DeploymentInjectingDependencyVisitor.java

@@ -82,8 +82,8 @@ public DeploymentInjectingDependencyVisitor(MavenArtifactResolver resolver, List
         // we need to be able to take into account whether the deployment dependencies are on an optional dependency branch
         // for that we are going to use a custom dependency selector and re-initialize the resolver to use it
         final DefaultRepositorySystemSession session = new DefaultRepositorySystemSession(resolver.getSession());
-        final DeploymentDependencySelector depSelector = new DeploymentDependencySelector(session.getDependencySelector());
-        session.setDependencySelector(depSelector);
+        session.setDependencySelector(
+                DeploymentDependencySelector.ensureDeploymentDependencySelector(session.getDependencySelector()));
         try {
             this.resolver = new MavenArtifactResolver(new BootstrapMavenContext(BootstrapMavenContext.config()
                     .setRepositorySystem(resolver.getSystem())