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Server-side library used by applications created with the JHipster generator, see https://www.jhipster.tech/ for more information on JHipster

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/*
 * Copyright 2016-2018 the original author or authors from the JHipster project.
 *
 * This file is part of the JHipster project, see https://www.jhipster.tech/
 * for more information.
 *
 * 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.github.jhipster.web.util;

import java.util.Optional;

import org.springframework.http.*;

/**
 * Utility class for ResponseEntity creation.
 */
public interface ResponseUtil {

    /**
     * Wrap the optional into a {@link ResponseEntity} with an {@link HttpStatus#OK} status, or if it's empty, it
     * returns a {@link ResponseEntity} with {@link HttpStatus#NOT_FOUND}.
     *
     * @param            type of the response
     * @param maybeResponse response to return if present
     * @return response containing {@code maybeResponse} if present or {@link HttpStatus#NOT_FOUND}
     */
    public static  ResponseEntity wrapOrNotFound(Optional maybeResponse) {
        return wrapOrNotFound(maybeResponse, null);
    }

    /**
     * Wrap the optional into a {@link ResponseEntity} with an {@link HttpStatus#OK} status with the headers, or if it's
     * empty, it returns a {@link ResponseEntity} with {@link HttpStatus#NOT_FOUND}.
     *
     * @param            type of the response
     * @param maybeResponse response to return if present
     * @param header        headers to be added to the response
     * @return response containing {@code maybeResponse} if present or {@link HttpStatus#NOT_FOUND}
     */
    public static  ResponseEntity wrapOrNotFound(Optional maybeResponse, HttpHeaders header) {
        return maybeResponse.map(response -> ResponseEntity.ok().headers(header).body(response))
            .orElse(new ResponseEntity<>(HttpStatus.NOT_FOUND));
    }

}