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Dapr Spring Data
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/*
 * Copyright 2024 The Dapr 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 io.dapr.spring.data.repository.config;

import io.dapr.spring.data.repository.query.DaprPredicateQueryCreator;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.context.annotation.ComponentScan.Filter;
import org.springframework.context.annotation.Import;
import org.springframework.data.keyvalue.core.KeyValueOperations;
import org.springframework.data.keyvalue.repository.config.QueryCreatorType;
import org.springframework.data.keyvalue.repository.support.KeyValueRepositoryFactoryBean;
import org.springframework.data.repository.config.DefaultRepositoryBaseClass;
import org.springframework.data.repository.query.QueryLookupStrategy;
import org.springframework.data.repository.query.QueryLookupStrategy.Key;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Annotation to activate Dapr repositories. If no base package is configured through either {@link #value()},
 * {@link #basePackages()} or {@link #basePackageClasses()} it will trigger scanning of the package of annotated class.
 */
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@Import(DaprRepositoriesRegistrar.class)
@QueryCreatorType(DaprPredicateQueryCreator.class)
public @interface EnableDaprRepositories {

  /**
   * Alias for the {@link #basePackages()} attribute. Allows for more concise annotation declarations e.g.:
   * {@code @EnableJpaRepositories("org.my.pkg")} instead of {@code @EnableJpaRepositories(basePackages="org.my.pkg")}.
   *
   * @return alias of the base package
   */
  String[] value() default {};

  /**
   * Base packages to scan for annotated components. {@link #value()} is an alias for (and mutually exclusive with) this
   * attribute. Use {@link #basePackageClasses()} for a type-safe alternative to String-based package names.
   *
   * @return array of base packages
   */
  String[] basePackages() default {};

  /**
   * Type-safe alternative to {@link #basePackages()} for specifying the packages to scan for annotated components. The
   * package of each class specified will be scanned. Consider creating a special no-op marker class or interface in
   * each package that serves no purpose other than being referenced by this attribute.
   *
   * @return array of base classes
   */
  Class[] basePackageClasses() default {};

  /**
   * Specifies which types are not eligible for component scanning.
   *
   * @return array of exclusion filters
   */
  Filter[] excludeFilters() default {};

  /**
   * Specifies which types are eligible for component scanning. Further narrows the set of candidate components from
   * everything in {@link #basePackages()} to everything in the base packages that matches the given filter or filters.
   *
   * @return array of inclusion filters
   */
  Filter[] includeFilters() default {};

  /**
   * Returns the postfix to be used when looking up custom repository implementations. Defaults to {@literal Impl}. So
   * for a repository named {@code PersonRepository} the corresponding implementation class will be looked up scanning
   * for {@code PersonRepositoryImpl}.
   *
   * @return repository implementation post fix
   */
  String repositoryImplementationPostfix() default "Impl";

  /**
   * Configures the location of where to find the Spring Data named queries properties file.
   *
   * @return named queries location
   */
  String namedQueriesLocation() default "";

  /**
   * Returns the key of the {@link QueryLookupStrategy} to be used for lookup queries for query methods. Defaults to
   * {@link Key#CREATE_IF_NOT_FOUND}.
   *
   * @return key lookup strategy
   */
  Key queryLookupStrategy() default Key.CREATE_IF_NOT_FOUND;

  /**
   * Returns the {@link FactoryBean} class to be used for each repository instance. Defaults to
   * {@link KeyValueRepositoryFactoryBean}.
   *
   * @return repository factory bean class
   */
  Class repositoryFactoryBeanClass() default KeyValueRepositoryFactoryBean.class;

  /**
   * Configure the repository base class to be used to create repository proxies for this particular configuration.
   *
   * @return repository base class
   */
  Class repositoryBaseClass() default DefaultRepositoryBaseClass.class;

  /**
   * Configures the name of the {@link KeyValueOperations} bean to be used with the repositories detected.
   *
   * @return the Key value template bean name
   */
  String keyValueTemplateRef() default "daprKeyValueTemplate";

  /**
   * Configures whether nested repository-interfaces (e.g. defined as inner classes) should be discovered by the
   * repositories infrastructure.
   *
   * @return whether to consider nested repository interfaces
   */
  boolean considerNestedRepositories() default false;
}