GlobalTestEnvironment.java

/*
Copyright 2012 Opera Software ASA
Copyright 2007-2009 WebDriver committers
Copyright 2007-2009 Google Inc.
Portions copyright 2007 ThoughtWorks, Inc

Licensed 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 com.opera.core.systems.environment;

/**
 * Used to hold a TestEnvironment in a static class-level field.
 */
public class GlobalTestEnvironment {

  private static TestEnvironment environment;

  public static boolean isSetUp() {
    return environment != null;
  }

  public static TestEnvironment get() {
    return environment;
  }

  public static void set(TestEnvironment environment) {
    GlobalTestEnvironment.environment = environment;
  }

  public static TestEnvironment get(
      Class<? extends TestEnvironment> startThisIfNothingIsAlreadyRunning) {
    if (environment == null) {
      try {
        environment = startThisIfNothingIsAlreadyRunning.newInstance();
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }

    return environment;
  }

  public static void stop() {
    if (environment != null) {
      environment.stop();
    }

    environment = null;
  }

}