DATAJPA-69 - Added JavaConfig support for repositories.

The repositories can now be bootstrapped using @EnableJpaRepositories annotation as follows:

@Configuration
@EnableJpaRepositories
class ApplicationConfig {
  
  // … declare EntityManagerFactory
  // … declare PlatformTransactionManager
}

src/test/java/org/springframework/data/jpa/repository/UserRepositoryTests.java

@@ -61,7 +61,7 @@ import org.springframework.transaction.annotation.Transactional;
  * @author Oliver Gierke
  */
 @RunWith(SpringJUnit4ClassRunner.class)
-@ContextConfiguration(locations = { "classpath:application-context.xml" })
+@ContextConfiguration("classpath:application-context.xml")
 @Transactional
 public class UserRepositoryTests {
 
@@ -889,6 +889,18 @@ public class UserRepositoryTests {
 		assertThat(repository.count(), is(count));
 	}
 
+	@Test
+	public void ordersByReferencedEntityCorrectly() {
+
+		flushTestUsers();
+		firstUser.setManager(thirdUser);
+		repository.save(firstUser);
+
+		Page<User> all = repository.findAll(new PageRequest(0, 10, new Sort("manager.id")));
+
+		assertThat(all.getContent().isEmpty(), is(false));
+	}
+
 	private Page<User> executeSpecWithSort(Sort sort) {
 
 		flushTestUsers();

src/test/java/org/springframework/data/jpa/repository/config/JpaRepositoriesRegistrarIntegrationTests.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2012 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.jpa.repository.config;
+
+import javax.persistence.EntityManagerFactory;
+import javax.sql.DataSource;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.jpa.repository.sample.UserRepository;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
+import org.springframework.orm.jpa.JpaDialect;
+import org.springframework.orm.jpa.JpaTransactionManager;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.HibernateJpaDialect;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.transaction.PlatformTransactionManager;
+
+/**
+ * Integration test for {@link JpaRepositoriesRegistrar}.
+ * 
+ * @author Oliver Gierke
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration
+public class JpaRepositoriesRegistrarIntegrationTests {
+
+	@Autowired
+	UserRepository repository;
+
+	@Configuration
+	@EnableJpaRepositories(basePackages = "org.springframework.data.jpa.repository.sample")
+	static class Config {
+
+		@Bean
+		public DataSource dataSource() {
+			return new EmbeddedDatabaseBuilder().build();
+		}
+
+		@Bean
+		public EntityManagerFactory entityManagerFactory() {
+			LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
+			factory.setDataSource(dataSource());
+			factory.setPersistenceUnitName("default");
+			factory.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
+			factory.afterPropertiesSet();
+			return factory.getObject();
+		}
+
+		@Bean
+		public JpaDialect jpaDialect() {
+			return new HibernateJpaDialect();
+		}
+
+		@Bean
+		public PlatformTransactionManager transactionManager() {
+			return new JpaTransactionManager(entityManagerFactory());
+		}
+	}
+
+	@Test
+	public void foo() {
+
+	}
+}

src/test/java/org/springframework/data/jpa/repository/config/JpaRepositoriesRegistrarUnitTests.java

@@ -0,0 +1,63 @@
+/*
+ * Copyright 2012 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.jpa.repository.config;
+
+import static org.hamcrest.CoreMatchers.*;
+import static org.junit.Assert.*;
+
+import java.util.Arrays;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.beans.factory.support.BeanDefinitionRegistry;
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
+import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
+import org.springframework.core.type.AnnotationMetadata;
+import org.springframework.core.type.StandardAnnotationMetadata;
+import org.springframework.data.jpa.repository.sample.UserRepository;
+
+/**
+ * Unit test for {@link JpaRepositoriesRegistrar}.
+ * 
+ * @author Oliver Gierke
+ */
+public class JpaRepositoriesRegistrarUnitTests {
+
+	BeanDefinitionRegistry registry;
+	AnnotationMetadata metadata;
+
+	@Before
+	public void setUp() {
+
+		metadata = new StandardAnnotationMetadata(Config.class, true);
+		registry = new DefaultListableBeanFactory();
+	}
+
+	@Test
+	public void configuresRepositoriesCorrectly() {
+
+		ImportBeanDefinitionRegistrar registrar = new JpaRepositoriesRegistrar();
+		registrar.registerBeanDefinitions(metadata, registry);
+
+		Iterable<String> names = Arrays.asList(registry.getBeanDefinitionNames());
+		assertThat(names, hasItems("userRepository", "auditableUserRepository", "roleRepository"));
+	}
+
+	@EnableJpaRepositories(basePackageClasses = UserRepository.class)
+	class Config {
+
+	}
+}