environment.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 711 行 · 第 1/2 页

        ((EnvironmentClassLoader) loader).addDependency(depend);
        return;
      }
    }
  }

  /**
   * Returns the topmost dynamic class loader.
   */
  public static DynamicClassLoader getDynamicClassLoader()
  {
    Thread thread = Thread.currentThread();
    
    return getDynamicClassLoader(thread.getContextClassLoader());
  }

  /**
   * Returns the topmost dynamic class loader.
   *
   * @param loader the context loader
   */
  public static DynamicClassLoader getDynamicClassLoader(ClassLoader loader)
  {
    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof DynamicClassLoader) {
        return (DynamicClassLoader) loader;
      }
    }

    return null;
  }
  
  /**
   * Adds a dependency to the current environment.
   *
   * @param depend the dependency to add
   */
  public static void addDependency(Path path)
  {
    addDependency(new Depend(path));
  }

  /**
   * Adds a dependency to the current environment.
   *
   * @param path the dependency to add
   * @param loader the context loader
   */
  public static void addDependency(Path path, ClassLoader loader)
  {
    addDependency(new Depend(path), loader);
  }

  /**
   * Gets a local variable for the current environment.
   *
   * @param name the attribute name
   *
   * @return the attribute value
   */
  public static Object getAttribute(String name)
  {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();

    return getAttribute(name, loader);
  }

  /**
   * Returns the current dependency check interval.
   */
  public static long getDependencyCheckInterval()
  {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();
    
    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof DynamicClassLoader)
        return ((DynamicClassLoader) loader).getDependencyCheckInterval();
    }

    return DynamicClassLoader.getGlobalDependencyCheckInterval();
  }

  /**
   * Returns the current dependency check interval.
   */
  public static long getDependencyCheckInterval(ClassLoader loader)
  {
    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof DynamicClassLoader)
        return ((DynamicClassLoader) loader).getDependencyCheckInterval();
    }

    return DynamicClassLoader.getGlobalDependencyCheckInterval();
  }

  /**
   * Gets a local variable for the current environment.
   *
   * @param name the attribute name
   * @param loader the context loader
   *
   * @return the attribute value
   */
  public static Object getAttribute(String name, ClassLoader loader)
  {
    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof EnvironmentClassLoader) {
        Object value = ((EnvironmentClassLoader) loader).getAttribute(name);

        if (value != null)
          return value;
      }
    }

    return null;
  }

  /**
   * Gets a local variable for the current environment.
   *
   * @param name the attribute name
   *
   * @return the attribute value
   */
  public static Object getLevelAttribute(String name)
  {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();

    return getLevelAttribute(name, loader);
  }

  /**
   * Gets a local variable for the current environment.
   *
   * @param name the attribute name
   * @param loader the context loader
   *
   * @return the attribute value
   */
  public static Object getLevelAttribute(String name, ClassLoader loader)
  {
    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof EnvironmentClassLoader) {
        return ((EnvironmentClassLoader) loader).getAttribute(name);
      }
    }

    return null;
  }

  /**
   * Sets a local variable for the current environment.
   *
   * @param name the attribute name
   * @param value the new attribute value
   *
   * @return the old attribute value
   */
  public static Object setAttribute(String name, Object value)
  {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();

    return setAttribute(name, value, loader);
  }

  /**
   * Sets a local variable for the current environment.
   *
   * @param name the attribute name
   * @param value the new attribute value
   * @param loader the context loader
   *
   * @return the old attribute value
   */
  public static Object setAttribute(String name,
                                    Object value,
                                    ClassLoader loader)
  {
    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof EnvironmentClassLoader) {
        EnvironmentClassLoader envLoader = (EnvironmentClassLoader) loader;

        Object oldValue = envLoader.getAttribute(name);

        envLoader.setAttribute(name, value);
        
        if (oldValue != null)
          return oldValue;
      }
    }

    return null;
  }

  /**
   * Adds a permission to the current environment.
   *
   * @param perm the permission to add.
   *
   * @return the old attribute value
   */
  public static void addPermission(Permission perm)
  {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();
    
    addPermission(perm, loader);
  }

  /**
   * Adds a permission to the current environment.
   *
   * @param perm the permission to add.
   *
   * @return the old attribute value
   */
  public static void addPermission(Permission perm, ClassLoader loader)
  {
    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof EnvironmentClassLoader) {
        EnvironmentClassLoader envLoader = (EnvironmentClassLoader) loader;

	envLoader.addPermission(perm);
      }
    }
  }

  /**
   * Gets the class loader owner.
   */
  public static Object getOwner()
  {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();

    return getOwner(loader);
  }

  /**
   * Gets the class loader owner.
   */
  public static Object getOwner(ClassLoader loader)
  {
    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof EnvironmentClassLoader) {
	EnvironmentClassLoader envLoader = (EnvironmentClassLoader) loader;

	Object owner = envLoader.getOwner();
	
	if (owner != null)
	  return owner;
      }
    }

    return null;
  }

  /**
   * Sets a configuration exception.
   */
  public static void setConfigException(Throwable e)
  {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();
    
    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof EnvironmentClassLoader) {
	EnvironmentClassLoader envLoader = (EnvironmentClassLoader) loader;

	envLoader.setConfigException(e);

	return;
      }
    }
  }

  /**
   * Returns any configuration exception.
   */
  public static Throwable getConfigException()
  {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();
    
    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof EnvironmentClassLoader) {
	EnvironmentClassLoader envLoader = (EnvironmentClassLoader) loader;

	if (envLoader.getConfigException() != null)
	  return envLoader.getConfigException();
      }
    }

    return null;
  }
  
  /**
   * Returns the environment name.
   */
  public static String getEnvironmentName()
  {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();

    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof EnvironmentClassLoader) {
	String name = ((EnvironmentClassLoader) loader).getId();

	if (name != null)
	  return name;
	else
	  return "";
      }
    }

    return Thread.currentThread().getContextClassLoader().toString();
  }

  /**
   * Returns the classpath for the environment level.
   */
  public static String getLocalClassPath()
  {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();
    
    return getLocalClassPath(loader);
  }
    
  /**
   * Returns the classpath for the environment level.
   */
  public static String getLocalClassPath(ClassLoader loader)
  {
    for (; loader != null; loader = loader.getParent()) {
      if (loader instanceof EnvironmentClassLoader) {
	return ((EnvironmentClassLoader) loader).getLocalClassPath();
      }
    }

    return CauchoSystem.getClassPath();
  }

  /**
   * destroys the current environment.
   */
  public static void closeGlobal()
  {
    ArrayList<ClassLoaderListener> listeners;
    listeners = new ArrayList<ClassLoaderListener>();
    listeners.addAll(_globalLoaderListeners);
    _globalLoaderListeners.clear();
    
    for (int i = 0; i < listeners.size(); i++) {
      ClassLoaderListener listener = listeners.get(i);

      listener.classLoaderDestroy(null);
    }
  }
}