code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC 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.openqa.selenium.docker.internal;
  
  import com.google.common.collect.ImmutableSet;
  import java.lang.reflect.Type;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import java.util.Set;
  import org.openqa.selenium.Beta;
  import org.openqa.selenium.docker.ImageId;
  import org.openqa.selenium.internal.Require;
  import org.openqa.selenium.json.JsonInput;
  import org.openqa.selenium.json.TypeToken;
  
  @Beta
  public class ImageSummary {
  
    public static final Type LIST_OF_STRING = new TypeToken<List<String>>() {}.getType();
    private final ImageId id;
    private final Set<String> repoTags;
  
    public ImageSummary(ImageId id, Collection<String> repoTags) {
      this.id = Require.nonNull("Image id", id);
      this.repoTags = ImmutableSet.copyOf(Require.nonNull("Repo tags", repoTags));
    }
  
    public ImageId getId() {
      return id;
    }
  
    public Set<String> getRepoTags() {
      return repoTags;
    }
  
    static ImageSummary fromJson(JsonInput input) {
      input.beginObject();
  
      ImageId id = null;
      List<String> repoTags = new ArrayList<>();
  
      while (input.hasNext()) {
        switch (input.nextName()) {
          case "Id":
            id = new ImageId(input.nextString());
            break;
  
          case "RepoTags":
            // This is a required field, but can be null. *sigh*
            List<String> tags = input.read(LIST_OF_STRING);
            if (tags != null) {
              repoTags = tags;
            }
            break;
  
          default:
            input.skipValue();
            break;
        }
      }
  
      input.endObject();
  
      return new ImageSummary(id, repoTags);
    }
  }
  