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Extensions to integrate Micronaut and Spring

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/*
 * Copyright 2017-2020 original 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 io.micronaut.spring.boot.condition;

import io.micronaut.context.annotation.Requires;

import java.lang.annotation.*;

/**
 * A condition class that requires a single candidate.
 *
 * @author graemerocher
 * @since 1.0
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.PACKAGE, ElementType.TYPE, ElementType.ANNOTATION_TYPE, ElementType.METHOD})
@Requires
public @interface RequiresSingleCandidate {
    /**
     * The candidate type.
     * @return The candidate type
     */
    Class value();
}