MyClassExportsMethodWithClinit.java example

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gwt-master
/*
 * Copyright 2014 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.core.interop;

import static junit.framework.Assert.assertEquals;

import jsinterop.annotations.JsConstructor;

class MyClassExportsMethodWithClinit {

  public static int magicNumber = 0;

  static {
    // prevent optimizations from inlining this clinit()
    if (Math.random() > -1) {
      magicNumber = 42;
    }
  }

  @JsConstructor
  public MyClassExportsMethodWithClinit() {
    // ensure clinit() is called even when invoked from JS
    assertEquals(42, magicNumber);
    magicNumber = 23;
  }
}