fix: Build with GRPC KSP processing fails (#10811)

Fixes #10647

inject-java-test/src/test/groovy/io/micronaut/inject/visitor/beans/BeanIntrospectionSpec.groovy

@@ -5374,6 +5374,23 @@ class Massive {
         introspection.getBeanProperties().size() == count
     }
 
+    @Issue("https://github.com/micronaut-projects/micronaut-core/issues/10647")
+    void 'handles generic definitions as generated by protobuf'() {
+        when:
+        buildBeanIntrospection('test.MyMessage', '''
+package test;
+
+import io.micronaut.core.annotation.Introspected;
+import io.micronaut.inject.visitor.beans.Message;
+
+@Introspected
+class MyMessage extends Message {
+}
+''')
+        then:
+        noExceptionThrown()
+    }
+
     @Override
     protected JavaParser newJavaParser() {
         return new JavaParser() {

inject-java-test/src/test/groovy/io/micronaut/inject/visitor/beans/Message.java

@@ -0,0 +1,16 @@
+package io.micronaut.inject.visitor.beans;
+
+public class Message {
+
+    public Builder<?> getBuilder() {
+        return new Builder<>();
+    }
+
+    public static final class Builder<BuilderT extends Builder<BuilderT>> {
+
+        class BuilderParentImpl {
+        }
+
+        private Builder<BuilderT>.BuilderParentImpl meAsParent;
+    }
+}

inject-kotlin/src/main/kotlin/io/micronaut/kotlin/processing/visitor/AbstractKotlinElement.kt

@@ -283,7 +283,7 @@ internal abstract class AbstractKotlinElement<T : KotlinNativeElement>(
     ): Map<String, ClassElement> {
         val typeArguments = mutableMapOf<String, ClassElement>()
         val typeParameters = type.declaration.typeParameters
-        if (type.arguments.isEmpty()) {
+        if (type.arguments.isEmpty() || type.arguments.size != typeParameters.size) {
             typeParameters.forEach {
                 typeArguments[it.name.asString()] =
                     resolveTypeParameter(owner, it, parentTypeArguments, visitedTypes)

inject-kotlin/src/test/groovy/io/micronaut/kotlin/processing/visitor/BeanIntrospectionSpec.groovy

@@ -20,6 +20,7 @@ import io.micronaut.core.type.GenericPlaceholder
 import io.micronaut.inject.ExecutableMethod
 import io.micronaut.kotlin.processing.elementapi.SomeEnum
 import io.micronaut.kotlin.processing.elementapi.TestClass
+import spock.lang.Issue
 
 import javax.persistence.Column
 import javax.persistence.Entity
@@ -2472,4 +2473,20 @@ data class ClassificationAndStats<out T : StatsEntry>(
         expect:
             statsProp.hasAnnotation(JsonIgnore)
     }
+
+    @Issue("https://github.com/micronaut-projects/micronaut-core/issues/10647")
+    void 'handles generic definitions as generated by protobuf'() {
+        when:
+        buildBeanIntrospection('test.MyMessage', '''
+package test
+
+import io.micronaut.core.annotation.Introspected
+import io.micronaut.kotlin.processing.visitor.Message
+
+@Introspected
+class MyMessage: Message()
+''')
+        then:
+        noExceptionThrown()
+    }
 }

inject-kotlin/src/test/java/io/micronaut/kotlin/processing/visitor/Message.java

@@ -0,0 +1,16 @@
+package io.micronaut.kotlin.processing.visitor;
+
+public class Message {
+
+    public Builder<?> getBuilder() {
+        return new Builder<>();
+    }
+
+    public static final class Builder<BuilderT extends Builder<BuilderT>> {
+
+        class BuilderParentImpl {
+        }
+
+        private Builder<BuilderT>.BuilderParentImpl meAsParent;
+    }
+}