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;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  
  public class UnhandledAlertException extends WebDriverException {
  
    private final String alertText;
  
    public UnhandledAlertException(String message) {
      this(message, null);
    }
  
    public UnhandledAlertException(String message, String alertText) {
      super(message + ": " + alertText);
      this.alertText = alertText;
    }
  
    /**
     * @return the text of the unhandled alert.
     */
    public String getAlertText() {
      return alertText;
    }
  
    // Used for serialising. Some of the drivers return the alert text like this.
    @Beta
    public Map<String, String> getAlert() {
      HashMap<String, String> toReturn = new HashMap<>();
      toReturn.put("text", getAlertText());
      return Collections.unmodifiableMap(toReturn);
    }
  }
  