DATALDAP-60 - Add LdapMappingContext and LdapPersistentEntity.

Add mapping context infrastructure for usage with Spring Data REST.

src/main/java/org/springframework/data/ldap/core/mapping/BasicLdapPersistentEntity.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2018 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.ldap.core.mapping;
+
+import org.springframework.data.mapping.model.BasicPersistentEntity;
+import org.springframework.data.util.TypeInformation;
+
+/**
+ * {@link LdapPersistentEntity} implementation.
+ *
+ * @author Mark Paluch
+ * @since 2.0.4
+ */
+public class BasicLdapPersistentEntity<T> extends BasicPersistentEntity<T, LdapPersistentProperty>
+		implements LdapPersistentEntity<T> {
+
+	/**
+	 * Creates a new {@link BasicLdapPersistentEntity}.
+	 *
+	 * @param information must not be {@literal null}.
+	 */
+	public BasicLdapPersistentEntity(TypeInformation<T> information) {
+		super(information);
+	}
+}

src/main/java/org/springframework/data/ldap/core/mapping/LdapMappingContext.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2018 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.ldap.core.mapping;
+
+import org.springframework.data.mapping.context.AbstractMappingContext;
+import org.springframework.data.mapping.model.Property;
+import org.springframework.data.mapping.model.SimpleTypeHolder;
+import org.springframework.data.util.TypeInformation;
+
+/**
+ * Mapping context for {@link LdapPersistentEntity LDAP-specific entities}.
+ *
+ * @author Mark Paluch
+ * @since 2.0.4
+ */
+public class LdapMappingContext extends AbstractMappingContext<BasicLdapPersistentEntity<?>, LdapPersistentProperty> {
+
+	/**
+	 * Creates a new {@link LdapMappingContext}.
+	 */
+	public LdapMappingContext() {
+		setSimpleTypeHolder(LdapSimpleTypes.HOLDER);
+	}
+
+	/* (non-Javadoc)
+	 * @see org.springframework.data.mapping.context.AbstractMappingContext#createPersistentEntity(org.springframework.data.util.TypeInformation)
+	 */
+	@Override
+	protected <T> BasicLdapPersistentEntity<?> createPersistentEntity(TypeInformation<T> typeInformation) {
+		return new BasicLdapPersistentEntity<>(typeInformation);
+	}
+
+	/* (non-Javadoc)
+	 * @see org.springframework.data.mapping.context.AbstractMappingContext#createPersistentProperty(org.springframework.data.mapping.model.Property, org.springframework.data.mapping.model.MutablePersistentEntity, org.springframework.data.mapping.model.SimpleTypeHolder)
+	 */
+	@Override
+	protected LdapPersistentProperty createPersistentProperty(Property property, BasicLdapPersistentEntity<?> owner,
+			SimpleTypeHolder simpleTypeHolder) {
+		return new LdapPersistentProperty(property, owner, simpleTypeHolder);
+	}
+}

src/main/java/org/springframework/data/ldap/core/mapping/LdapPersistentEntity.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2018 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.ldap.core.mapping;
+
+import org.springframework.data.mapping.PersistentEntity;
+
+/**
+ * LDAP specific {@link PersistentEntity}.
+ *
+ * @author Mark Paluch
+ * @since 2.0.4
+ */
+public interface LdapPersistentEntity<T> extends PersistentEntity<T, LdapPersistentProperty> {}

src/main/java/org/springframework/data/ldap/core/mapping/LdapPersistentProperty.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2018 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.ldap.core.mapping;
+
+import org.springframework.data.mapping.Association;
+import org.springframework.data.mapping.PersistentEntity;
+import org.springframework.data.mapping.model.AnnotationBasedPersistentProperty;
+import org.springframework.data.mapping.model.Property;
+import org.springframework.data.mapping.model.SimpleTypeHolder;
+import org.springframework.data.util.Lazy;
+import org.springframework.ldap.odm.annotations.Id;
+
+/**
+ * LDAP-specific {@link AnnotationBasedPersistentProperty}. By default, if a property is named {@code id} it's used as
+ * Id property.
+ *
+ * @author Mark Paluch
+ * @since 2.0.4
+ */
+public class LdapPersistentProperty extends AnnotationBasedPersistentProperty<LdapPersistentProperty> {
+
+	private final Lazy<Boolean> isId = Lazy.of(() -> isAnnotationPresent(Id.class));
+
+	/**
+	 * Create a new {@link LdapPersistentProperty}.
+	 *
+	 * @param property must not be {@literal null}.
+	 * @param owner must not be {@literal null}.
+	 * @param simpleTypeHolder must not be {@literal null}.
+	 */
+	public LdapPersistentProperty(Property property, PersistentEntity<?, LdapPersistentProperty> owner,
+			SimpleTypeHolder simpleTypeHolder) {
+		super(property, owner, simpleTypeHolder);
+	}
+
+	/* (non-Javadoc)
+	 * @see org.springframework.data.mapping.model.AbstractPersistentProperty#createAssociation()
+	 */
+	@Override
+	protected Association<LdapPersistentProperty> createAssociation() {
+		return null;
+	}
+
+	/* (non-Javadoc)
+	 * @see org.springframework.data.mapping.model.AnnotationBasedPersistentProperty#isIdProperty()
+	 */
+	@Override
+	public boolean isIdProperty() {
+		return isId.get();
+	}
+}

src/main/java/org/springframework/data/ldap/core/mapping/LdapSimpleTypes.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2018 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.ldap.core.mapping;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import javax.naming.Name;
+
+import org.springframework.data.mapping.model.SimpleTypeHolder;
+
+/**
+ * Simple constant holder for a {@link SimpleTypeHolder} enriched with LDAP-specific simple types.
+ *
+ * @author Mark Paluch
+ * @since 2.0.4
+ */
+public abstract class LdapSimpleTypes {
+
+	static {
+
+		Set<Class<?>> simpleTypes = new HashSet<>();
+		simpleTypes.add(Name.class);
+
+		VAULT_SIMPLE_TYPES = Collections.unmodifiableSet(simpleTypes);
+	}
+
+	private static final Set<Class<?>> VAULT_SIMPLE_TYPES;
+
+	public static final SimpleTypeHolder HOLDER = new SimpleTypeHolder(VAULT_SIMPLE_TYPES, true);
+
+	private LdapSimpleTypes() {}
+}

src/main/java/org/springframework/data/ldap/core/mapping/package-info.java

@@ -0,0 +1,6 @@
+/**
+ * Infrastructure for the LDAP object mapping subsystem.
+ */
+@org.springframework.lang.NonNullApi
+@org.springframework.lang.NonNullFields
+package org.springframework.data.ldap.core.mapping;

src/main/java/org/springframework/data/ldap/repository/config/LdapRepositoryConfigurationExtension.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2017 the original author or authors.
+ * Copyright 2016-2018 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.
@@ -19,14 +19,20 @@ import java.lang.annotation.Annotation;
 import java.util.Collection;
 import java.util.Collections;
 
+import org.springframework.beans.factory.support.AbstractBeanDefinition;
 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.support.BeanDefinitionRegistry;
+import org.springframework.beans.factory.support.RootBeanDefinition;
 import org.springframework.core.annotation.AnnotationAttributes;
+import org.springframework.data.ldap.core.mapping.LdapMappingContext;
 import org.springframework.data.ldap.repository.LdapRepository;
 import org.springframework.data.ldap.repository.support.LdapRepositoryFactoryBean;
 import org.springframework.data.repository.config.AnnotationRepositoryConfigurationSource;
 import org.springframework.data.repository.config.RepositoryConfigurationExtension;
 import org.springframework.data.repository.config.RepositoryConfigurationExtensionSupport;
+import org.springframework.data.repository.config.RepositoryConfigurationSource;
 import org.springframework.data.repository.config.XmlRepositoryConfigurationSource;
+import org.springframework.data.repository.core.RepositoryMetadata;
 import org.springframework.ldap.odm.annotations.Entry;
 import org.springframework.util.StringUtils;
 import org.w3c.dom.Element;
@@ -40,6 +46,7 @@ import org.w3c.dom.Element;
 public class LdapRepositoryConfigurationExtension extends RepositoryConfigurationExtensionSupport {
 
 	private static final String ATT_LDAP_TEMPLATE_REF = "ldap-template-ref";
+	private static final String MAPPING_CONTEXT_BEAN_NAME = "ldapMappingContext";
 
 	/*
 	 * (non-Javadoc)
@@ -99,6 +106,7 @@ public class LdapRepositoryConfigurationExtension extends RepositoryConfiguratio
 		}
 
 		builder.addPropertyReference("ldapOperations", ldapTemplateRef);
+		builder.addPropertyReference("mappingContext", MAPPING_CONTEXT_BEAN_NAME);
 	}
 
 	/* (non-Javadoc)
@@ -110,5 +118,28 @@ public class LdapRepositoryConfigurationExtension extends RepositoryConfiguratio
 		AnnotationAttributes attributes = config.getAttributes();
 
 		builder.addPropertyReference("ldapOperations", attributes.getString("ldapTemplateRef"));
+		builder.addPropertyReference("mappingContext", MAPPING_CONTEXT_BEAN_NAME);
+	}
+
+	@Override
+	public void registerBeansForRoot(BeanDefinitionRegistry registry, RepositoryConfigurationSource configurationSource) {
+
+		if (!registry.containsBeanDefinition(MAPPING_CONTEXT_BEAN_NAME)) {
+
+			RootBeanDefinition definition = new RootBeanDefinition(LdapMappingContext.class);
+			definition.setRole(AbstractBeanDefinition.ROLE_INFRASTRUCTURE);
+			definition.setSource(configurationSource.getSource());
+
+			registry.registerBeanDefinition(MAPPING_CONTEXT_BEAN_NAME, definition);
+		}
+	}
+
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.repository.config.RepositoryConfigurationExtensionSupport#useRepositoryConfiguration(org.springframework.data.repository.core.RepositoryMetadata)
+	 */
+	@Override
+	protected boolean useRepositoryConfiguration(RepositoryMetadata metadata) {
+		return !metadata.isReactiveRepository();
 	}
 }

src/main/java/org/springframework/data/ldap/repository/query/LdapQueryCreator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2017 the original author or authors.
+ * Copyright 2016-2018 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.
@@ -92,7 +92,8 @@ class LdapQueryCreator extends AbstractQueryCreator<LdapQuery, ContainerCriteria
 
 		String value = null;
 		if (iterator.hasNext()) {
-			value = iterator.next().toString();
+			Object next = iterator.next();
+			value = next != null ? next.toString() : null;
 		}
 		switch (type) {
 			case NEGATING_SIMPLE_PROPERTY:

src/main/java/org/springframework/data/ldap/repository/support/LdapRepositoryFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2017 the original author or authors.
+ * Copyright 2016-2018 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 +17,8 @@ package org.springframework.data.ldap.repository.support;
 
 import javax.naming.Name;
 
+import org.springframework.data.ldap.core.mapping.LdapMappingContext;
+import org.springframework.data.mapping.context.MappingContext;
 import org.springframework.data.repository.Repository;
 import org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport;
 import org.springframework.data.repository.core.support.RepositoryFactorySupport;
@@ -36,6 +38,7 @@ public class LdapRepositoryFactoryBean<T extends Repository<S, Name>, S>
 		extends RepositoryFactoryBeanSupport<T, S, Name> {
 
 	private @Nullable LdapOperations ldapOperations;
+	private boolean mappingContextConfigured = false;
 
 	/**
 	 * Creates a new {@link LdapRepositoryFactoryBean} for the given repository interface.
@@ -46,10 +49,24 @@ public class LdapRepositoryFactoryBean<T extends Repository<S, Name>, S>
 		super(repositoryInterface);
 	}
 
+	/**
+	 * @param ldapOperations
+	 */
 	public void setLdapOperations(LdapOperations ldapOperations) {
 		this.ldapOperations = ldapOperations;
 	}
 
+	/*
+	 * (non-Javadoc)
+	 * @see org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport#setMappingContext(org.springframework.data.mapping.context.MappingContext)
+	 */
+	@Override
+	public void setMappingContext(MappingContext<?, ?> mappingContext) {
+
+		super.setMappingContext(mappingContext);
+		this.mappingContextConfigured = true;
+	}
+
 	/*
 	 * (non-Javadoc)
 	 * @see org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport#createRepositoryFactory()
@@ -72,5 +89,9 @@ public class LdapRepositoryFactoryBean<T extends Repository<S, Name>, S>
 		Assert.notNull(ldapOperations, "LdapOperations must be set");
 
 		super.afterPropertiesSet();
+
+		if (!mappingContextConfigured) {
+			setMappingContext(new LdapMappingContext());
+		}
 	}
 }

src/test/java/org/springframework/data/ldap/core/mapping/LdapMappingContextUnitTests.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 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.ldap.core.mapping;
+
+import static org.assertj.core.api.Assertions.*;
+
+import org.junit.Test;
+import org.springframework.ldap.odm.annotations.Id;
+
+/**
+ * Unit tests for {@link LdapMappingContext}.
+ *
+ * @author Mark Paluch
+ */
+public class LdapMappingContextUnitTests {
+
+	@Test // DATALDAP-60
+	public void shouldCreatePersistentEntities() {
+
+		LdapMappingContext context = new LdapMappingContext();
+
+		BasicLdapPersistentEntity<?> entity = context.getPersistentEntity(Person.class);
+
+		assertThat(entity).isNotNull();
+	}
+
+	static class Person {
+
+		@Id String id;
+
+	}
+}

src/test/java/org/springframework/data/ldap/core/mapping/LdapPersistentPropertyUnitTests.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 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.ldap.core.mapping;
+
+import static org.assertj.core.api.Assertions.*;
+
+import org.junit.Test;
+import org.springframework.ldap.odm.annotations.Id;
+
+/**
+ * Unit tests for {@link LdapPersistentProperty}.
+ *
+ * @author Mark Paluch
+ */
+public class LdapPersistentPropertyUnitTests {
+
+	@Test // DATALDAP-60
+	public void shouldConsiderOdmIdAsIdentifier() {
+
+		LdapMappingContext context = new LdapMappingContext();
+		BasicLdapPersistentEntity<?> entity = context.getRequiredPersistentEntity(Person.class);
+
+		assertThat(entity.getRequiredPersistentProperty("odmId").isIdProperty()).isTrue();
+		assertThat(entity.getRequiredPersistentProperty("dataId").isIdProperty()).isFalse();
+	}
+
+	static class Person {
+
+		@Id String odmId;
+		@org.springframework.data.annotation.Id String dataId;
+	}
+}

src/test/java/org/springframework/data/ldap/repository/config/LdapRepositoryConfigurationExtensionUnitTests.java

@@ -0,0 +1,108 @@
+/*
+ * Copyright 2018 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.ldap.repository.config;
+
+import static org.junit.Assert.*;
+
+import java.util.Collection;
+
+import org.junit.Test;
+import org.springframework.beans.factory.support.BeanDefinitionRegistry;
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
+import org.springframework.core.env.Environment;
+import org.springframework.core.env.StandardEnvironment;
+import org.springframework.core.io.ResourceLoader;
+import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
+import org.springframework.core.type.StandardAnnotationMetadata;
+import org.springframework.data.ldap.repository.LdapRepository;
+import org.springframework.data.repository.Repository;
+import org.springframework.data.repository.config.AnnotationRepositoryConfigurationSource;
+import org.springframework.data.repository.config.RepositoryConfiguration;
+import org.springframework.data.repository.config.RepositoryConfigurationSource;
+import org.springframework.ldap.odm.annotations.Entry;
+
+/**
+ * Unit tests for {@link LdapRepositoryConfigurationExtension}.
+ *
+ * @author Mark Paluch
+ */
+public class LdapRepositoryConfigurationExtensionUnitTests {
+
+	StandardAnnotationMetadata metadata = new StandardAnnotationMetadata(Config.class, true);
+	ResourceLoader loader = new PathMatchingResourcePatternResolver();
+	Environment environment = new StandardEnvironment();
+	BeanDefinitionRegistry registry = new DefaultListableBeanFactory();
+
+	RepositoryConfigurationSource configurationSource = new AnnotationRepositoryConfigurationSource(metadata,
+			EnableLdapRepositories.class, loader, environment, registry);
+
+	@Test // DATALDAP-60
+	public void isStrictMatchIfDomainTypeIsAnnotatedWithEntry() {
+
+		LdapRepositoryConfigurationExtension extension = new LdapRepositoryConfigurationExtension();
+		assertHasRepo(SampleRepository.class, extension.getRepositoryConfigurations(configurationSource, loader, true));
+	}
+
+	@Test // DATALDAP-60
+	public void isStrictMatchIfRepositoryExtendsStoreSpecificBase() {
+
+		LdapRepositoryConfigurationExtension extension = new LdapRepositoryConfigurationExtension();
+		assertHasRepo(StoreRepository.class, extension.getRepositoryConfigurations(configurationSource, loader, true));
+	}
+
+	@Test // DATALDAP-60
+	public void isNotStrictMatchIfDomainTypeIsNotAnnotatedWithEntry() {
+
+		LdapRepositoryConfigurationExtension extension = new LdapRepositoryConfigurationExtension();
+		assertDoesNotHaveRepo(UnannotatedRepository.class,
+				extension.getRepositoryConfigurations(configurationSource, loader, true));
+	}
+
+	private static void assertHasRepo(Class<?> repositoryInterface,
+			Collection<RepositoryConfiguration<RepositoryConfigurationSource>> configs) {
+
+		for (RepositoryConfiguration<?> config : configs) {
+			if (config.getRepositoryInterface().equals(repositoryInterface.getName())) {
+				return;
+			}
+		}
+
+		fail("Expected to find config for repository interface ".concat(repositoryInterface.getName()).concat(" but got ")
+				.concat(configs.toString()));
+	}
+
+	private static void assertDoesNotHaveRepo(Class<?> repositoryInterface,
+			Collection<RepositoryConfiguration<RepositoryConfigurationSource>> configs) {
+
+		for (RepositoryConfiguration<?> config : configs) {
+			if (config.getRepositoryInterface().equals(repositoryInterface.getName())) {
+				fail("Expected not to find config for repository interface ".concat(repositoryInterface.getName()));
+			}
+		}
+	}
+
+	@EnableLdapRepositories(considerNestedRepositories = true)
+	static class Config {}
+
+	@Entry(objectClasses = "person")
+	static class Sample {}
+
+	interface SampleRepository extends Repository<Sample, Long> {}
+
+	interface UnannotatedRepository extends Repository<Object, Long> {}
+
+	interface StoreRepository extends LdapRepository<Object> {}
+}