/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.shenyu.sdk.feign;

import org.springframework.context.annotation.Import;

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

/**
 * Scans for interfaces that declare they are Shenyu clients (via
 * {@link ShenyuClient} <code>@ShenyuClient</code>).
 * Configures component scanning directives for use with
 * {@link org.springframework.context.annotation.Configuration}
 * <code>@Configuration</code> classes.
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@Documented
@Import(ShenyuClientsRegistrar.class)
public @interface EnableShenyuClients {

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

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

}
