Package com.google.gwt.lang

Source Code of com.google.gwt.lang.Exceptions

/*
* Copyright 2006 Google 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.google.gwt.lang;

import com.google.gwt.core.client.JavaScriptException;

/**
* This is a magic class the compiler uses to throw and check exceptions.
*/
final class Exceptions {

  static Object caught(Object e) {
    if (e instanceof Throwable) {
      return e;
    }
    return new JavaScriptException(javaScriptExceptionName(e),
        javaScriptExceptionDescription(e));
  }

  /**
   * Returns the description of an unexpected JavaScript exception (not a normal
   * Java one).
   */
  private static native String javaScriptExceptionDescription(Object e) /*-{
    return e.message;
  }-*/;

  /**
   * Returns the name of an unexpected JavaScript exception (not a normal Java
   * one).
   */
  private static native String javaScriptExceptionName(Object e) /*-{
    return e.name;
  }-*/;

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