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 java.net.URI;
  import javax.json.Json;
  import javax.json.JsonObject;
  import javax.json.JsonObjectBuilder;
  import org.apache.http.HttpStatus;
  import org.apache.http.client.HttpClient;
  import org.apache.http.client.methods.HttpPost;
  import org.apache.http.entity.ContentType;
  import org.apache.http.entity.StringEntity;
  
  /**
   * Runtime {@link Networks}.
   *
   * @author George Aristy (george.aristy@gmail.com)
   * @version $Id: 1d1e0a0c348aa5fd657b01ec4cbe00e348523155 $
   * @since 0.0.4
   */
  abstract class RtNetworks implements Networks {
      /**
       * Apache HttpClient which sends the requests.
       */
      private final HttpClient client;
  
      /**
       * Base URI for Networks API.
       */
      private final URI baseUri;
  
      /**
       * Docker API.
       */
      private final Docker docker;
  
      /**
       * Ctor.
       * @param client The http client.
       * @param uri The URI for this Network API.
       * @param dkr The docker entry point.
       */
      RtNetworks(final HttpClient client, final URI uri, final Docker dkr) {
          this.client = client;
          this.baseUri = uri;
          this.docker = dkr;
      }
  
      @Override
      public Network create(final String name)
          throws IOException, UnexpectedResponseException {
          return this.create(name, Json.createObjectBuilder().build());
      }
  
      @Override
      public Network create(final String name, final JsonObject filters)
          throws IOException, UnexpectedResponseException {
          final JsonObjectBuilder json = Json.createObjectBuilder();
          json.add("Name", name);
          filters.forEach(json::add);
          return this.createNetwork(json);
      }
  
      @Override
      public void prune() throws IOException, UnexpectedResponseException {
          final HttpPost prune = new HttpPost(
              this.baseUri.toString().concat("/prune")
          );
          try {
              this.client.execute(
                  prune,
                  new MatchStatus(prune.getURI(), HttpStatus.SC_OK)
              );
          } finally {
              prune.releaseConnection();
          }
      }
  
      @Override
      public Docker docker() {
          return this.docker;
      }
  
      /**
       * Get the (protected) HttpClient for subclasses.
       * @return HttpClient.
       */
      HttpClient client() {
          return this.client;
      }
  
      /**
       * Get the (protected) base URI for subclasses.
       * @return URI.
       */
      URI baseUri() {
          return this.baseUri;
      }
  
      /**
       * Create network using JsonObjectBuilder.
       * @param json Json Object Builder object.
       * @return The created Network.
       * @throws IOException If something goes wrong.
       */
      private Network createNetwork(final JsonObjectBuilder json)
          throws IOException {
          final HttpPost create =
              new HttpPost(
                  String.format("%s/%s", this.baseUri.toString(), "create")
              );
          try {
              create.setEntity(
                  new StringEntity(
                      json.build().toString(), ContentType.APPLICATION_JSON
                  )
              );
              final JsonObject createResult = this.client.execute(
                  create,
                  new ReadJsonObject(
                      new MatchStatus(
                          create.getURI(),
                          HttpStatus.SC_CREATED
                      )
                  )
              );
              if (!createResult.isEmpty()) {
                  return new RtNetwork(createResult,
                      this.client,
                      URI.create(
                          String.format("%s/%s", this.baseUri.toString(),
                              createResult.getString("Id"))
                      ),
                      this.docker
                  );
              } else {
                  throw new IOException(
                      "Got empty response from Networks.create() method"
                  );
              }
          } finally {
              create.releaseConnection();
          }
      }
  }
  