content: /**
   * Copyright (c) 2018-2019, Mihai Emil Andronache
   * All rights reserved.
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   * 1)Redistributions of source code must retain the above copyright notice,
   * this list of conditions and the following disclaimer.
   * 2)Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation
   * and/or other materials provided with the distribution.
   * 3)Neither the name of docker-java-api nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  package com.amihaiemil.docker;
  
  import java.io.IOException;
  import javax.json.Json;
  import javax.json.JsonObject;
  import org.apache.http.HttpEntityEnclosingRequest;
  import org.apache.http.HttpRequest;
  import org.apache.http.HttpResponse;
  
  /**
   * JSON payload of an HttpRequest.
   *
   * @author George Aristy (george.aristy@gmail.com)
   * @version $Id: 8a74c4fff5796693a229c35e7815db8e2a072ef9 $
   * @since 0.0.1
   * @todo #108:30min Add tests for PayloadOf.
   */
  final class PayloadOf extends JsonResource {
      /**
       * Ctor.
       * 
       * @param request The http request
       * @throws IllegalStateException if the request's payload cannot be read
       */
      PayloadOf(final HttpRequest request) {
          super(() -> {
              try {
                  final JsonObject body;
                  if (request instanceof HttpEntityEnclosingRequest) {
                      body = Json.createReader(
                          ((HttpEntityEnclosingRequest) request).getEntity()
                              .getContent()
                      ).readObject();
                  } else {
                      body =  Json.createObjectBuilder().build();
                  }
                  return body;
              } catch (final IOException ex) {
                  throw new IllegalStateException(
                      "Cannot read request payload", ex
                  );
              }
          });
      }
  
      /**
       * Ctor.
       * @param response The http response.
       * @throws IllegalStateException if the response's payload cannot be read
       */
      PayloadOf(final HttpResponse response) {
          super(() -> {
              try {
                  return Json.createReader(
                      response.getEntity().getContent()
                  ).readObject();
              } catch (final IOException ex) {
                  throw new IllegalStateException(
                      "Cannot read response payload", ex
                  );
              }
          });
      }
  }
  