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.grid.data;
  
  import static java.util.Collections.unmodifiableMap;
  
  import java.util.Map;
  import java.util.TreeMap;
  import org.openqa.selenium.internal.Require;
  import org.openqa.selenium.json.JsonInput;
  
  public class NewSessionErrorResponse {
  
    private final String message;
    private final RequestId requestId;
  
    public NewSessionErrorResponse(RequestId requestId, String message) {
      this.requestId = Require.nonNull("Request Id", requestId);
      this.message = Require.nonNull("Message", message);
    }
  
    public String getMessage() {
      return message;
    }
  
    public RequestId getRequestId() {
      return requestId;
    }
  
    private Map<String, Object> toJson() {
      Map<String, Object> toReturn = new TreeMap<>();
      toReturn.put("message", message);
      toReturn.put("requestId", requestId);
      return unmodifiableMap(toReturn);
    }
  
    private static NewSessionErrorResponse fromJson(JsonInput input) {
      String message = null;
      RequestId requestId = null;
  
      input.beginObject();
      while (input.hasNext()) {
        switch (input.nextName()) {
          case "message":
            message = input.read(String.class);
            break;
  
          case "requestId":
            requestId = input.read(RequestId.class);
            break;
  
          default:
            input.skipValue();
            break;
        }
      }
      input.endObject();
  
      return new NewSessionErrorResponse(requestId, message);
    }
  }
  