Fix ClassCastException of BeanReadPropertyImpl to BeanProperty

core/src/main/java/io/micronaut/core/beans/BeanIntrospection.java

@@ -327,7 +327,7 @@ default <P> BeanWriteProperty<T, P> getRequiredWriteProperty(@NonNull String nam
         final BeanReadProperty<T, ?> prop = getReadProperty(name).orElse(null);
         if (prop != null && type.isAssignableFrom(prop.getType())) {
             //noinspection unchecked
-            return Optional.of((BeanProperty<T, P>) prop);
+            return Optional.of((BeanReadProperty<T, P>) prop);
         }
         return Optional.empty();
     }

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

@@ -801,6 +801,59 @@ class Test {
         introspection.getProperty("foo").get().type == String.class
     }
 
+    void "test read property by type is defined by its reader field"() {
+        given:
+        def introspection = buildBeanIntrospection('test.Test', '''
+package test;
+
+import io.micronaut.core.annotation.Introspected;
+import io.micronaut.context.annotation.Executable;
+import io.micronaut.core.annotation.Nullable;
+import java.util.Optional;
+
+@Introspected(accessKind = {Introspected.AccessKind.METHOD, Introspected.AccessKind.FIELD})
+class Test {
+    @Nullable
+    String foo;
+
+    public Optional<String> getFoo() {
+        return Optional.ofNullable(foo);
+    }
+
+}
+''')
+        expect:
+        introspection.getReadProperty("foo", String.class).isEmpty()
+        introspection.getReadProperty("foo", Optional.class).get().type == Optional.class
+
+    }
+
+    void "test read property type is defined by its field"() {
+        given:
+        def introspection = buildBeanIntrospection('test.Test', '''
+package test;
+
+import io.micronaut.core.annotation.Introspected;
+import io.micronaut.context.annotation.Executable;
+import io.micronaut.core.annotation.Nullable;
+import java.util.Optional;
+
+@Introspected(accessKind = {Introspected.AccessKind.METHOD, Introspected.AccessKind.FIELD})
+class Test {
+    @Nullable
+    String foo;
+
+    public void setFoo(Optional<String> foo) {
+        this.foo = foo.orElse(null);
+    }
+
+}
+''')
+        expect:
+        introspection.getReadProperty("foo", String.class).get().type == String.class
+        introspection.getReadProperty("foo", Optional.class).isEmpty()
+    }
+
     void "test optional property type is defined by its setter"() {
         given:
         def introspection = buildBeanIntrospection('test.Test', '''