Merge pull request #19789 from grudir

* pr/19789:
  Polish "Add support for Spring Data Couchbase custom type key"
  Add support for Spring Data Couchbase custom type key

Closes gh-19789

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/couchbase/CouchbaseDataProperties.java

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -17,6 +17,7 @@
 package org.springframework.boot.autoconfigure.data.couchbase;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.data.couchbase.core.convert.DefaultCouchbaseTypeMapper;
 import org.springframework.data.couchbase.core.query.Consistency;
 
 /**
@@ -39,6 +40,12 @@ public class CouchbaseDataProperties {
 	 */
 	private Consistency consistency = Consistency.READ_YOUR_OWN_WRITES;
 
+	/**
+	 * Name of the field that stores the type information for complex types when using
+	 * "MappingCouchbaseConverter".
+	 */
+	private String typeKey = DefaultCouchbaseTypeMapper.DEFAULT_TYPE_KEY;
+
 	public boolean isAutoIndex() {
 		return this.autoIndex;
 	}
@@ -55,4 +62,12 @@ public class CouchbaseDataProperties {
 		this.consistency = consistency;
 	}
 
+	public String getTypeKey() {
+		return this.typeKey;
+	}
+
+	public void setTypeKey(String typeKey) {
+		this.typeKey = typeKey;
+	}
+
 }

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/couchbase/SpringBootCouchbaseDataConfiguration.java

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -73,6 +73,11 @@ class SpringBootCouchbaseDataConfiguration extends AbstractCouchbaseDataConfigur
 		return new EntityScanner(this.applicationContext).scan(Document.class, Persistent.class);
 	}
 
+	@Override
+	public String typeKey() {
+		return this.properties.getTypeKey();
+	}
+
 	@Override
 	@ConditionalOnMissingBean(name = BeanNames.COUCHBASE_TEMPLATE)
 	@Bean(name = BeanNames.COUCHBASE_TEMPLATE)

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/couchbase/CouchbaseDataAutoConfigurationTests.java

 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -40,6 +40,7 @@ import org.springframework.data.couchbase.config.BeanNames;
 import org.springframework.data.couchbase.config.CouchbaseConfigurer;
 import org.springframework.data.couchbase.core.CouchbaseTemplate;
 import org.springframework.data.couchbase.core.convert.CouchbaseCustomConversions;
+import org.springframework.data.couchbase.core.convert.DefaultCouchbaseTypeMapper;
 import org.springframework.data.couchbase.core.mapping.CouchbaseMappingContext;
 import org.springframework.data.couchbase.core.mapping.event.ValidatingCouchbaseEventListener;
 import org.springframework.data.couchbase.core.query.Consistency;
@@ -119,6 +120,19 @@ class CouchbaseDataAutoConfigurationTests {
 		assertThat(initialEntitySet).containsOnly(City.class);
 	}
 
+	@Test
+	void typeKeyDefault() {
+		load(CouchbaseTestConfigurer.class);
+		assertThat(this.context.getBean(AbstractCouchbaseDataConfiguration.class).typeKey())
+				.isEqualTo(DefaultCouchbaseTypeMapper.DEFAULT_TYPE_KEY);
+	}
+
+	@Test
+	void typeKeyCanBeCustomized() {
+		load(CouchbaseTestConfigurer.class, "spring.data.couchbase.type-key=_custom");
+		assertThat(this.context.getBean(AbstractCouchbaseDataConfiguration.class).typeKey()).isEqualTo("_custom");
+	}
+
 	@Test
 	void customConversions() {
 		load(CustomConversionsConfig.class);

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/couchbase/CouchbaseDataPropertiesTests.java

+/*
+ * Copyright 2012-2020 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
+ *
+ *      https://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.boot.autoconfigure.data.couchbase;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.data.couchbase.config.CouchbaseConfigurationSupport;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link CouchbaseDataProperties}.
+ *
+ * @author Stephane Nicoll
+ */
+class CouchbaseDataPropertiesTests {
+
+	@Test
+	void typeKeyHasConsistentDefault() {
+		assertThat(new CouchbaseDataProperties().getTypeKey()).isEqualTo(new CouchbaseConfigurationSupport().typeKey());
+	}
+
+}