DATACMNS-1171 - Do not create PersistentEntity for unsupported Kotlin classes.

We now reject unsupported Kotlin classes from the MappingContext by default by not creating persistent entities.

Original pull request: #245.

src/test/java/org/springframework/data/mapping/context/AbstractMappingContextUnitTests.java

@@ -45,6 +45,7 @@ import org.springframework.util.StringUtils;
  *
  * @author Oliver Gierke
  * @author Thomas Darimont
+ * @author Mark Paluch
  */
 public class AbstractMappingContextUnitTests {
 
@@ -210,6 +211,16 @@ public class AbstractMappingContextUnitTests {
 		assertHasEntityFor(TreeMap.class, context, false);
 	}
 
+	@Test // DATACMNS-1171
+	public void shouldCreateEntityForKotlinDataClass() {
+		assertThat(context.getPersistentEntity(SimpleDataClass.class)).isNotNull();
+	}
+
+	@Test // DATACMNS-1171
+	public void shouldNotCreateEntityForSyntheticKotlinClass() {
+		assertThat(context.getPersistentEntity(TypeCreatingSyntheticClass.class)).isNotNull();
+	}
+
 	@Test // DATACMNS-695
 	public void persistentPropertyPathTraversesGenericTypesCorrectly() {
 		assertThat(context.getPersistentPropertyPath("field.wrapped.field", Outer.class)).hasSize(3);

src/test/kotlin/org/springframework/data/mapping/context/SimpleDataClass.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2017 the original author or authors.
+ *
+ * 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 org.springframework.data.mapping.context
+
+/**
+ * @author Mark Paluch
+ */
+data class SimpleDataClass(val firstname: String) {
+}

src/test/kotlin/org/springframework/data/mapping/context/TypeCreatingSyntheticClass.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2017 the original author or authors.
+ *
+ * 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 org.springframework.data.mapping.context
+
+/**
+ * @author Mark Paluch
+ */
+class TypeCreatingSyntheticClass {
+}
+
+fun foobar(args: Array<String>) {
+}