| /* |
| * Copyright 2008 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.client; |
| |
| import java.lang.annotation.ElementType; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.lang.annotation.Target; |
| |
| /** |
| * This annotation can be placed on a native method to allow it to directly |
| * access Java <code>long</code> values. Without this annotation present, |
| * accessing a <code>long</code> in any way from a JSNI method is an error. |
| * This includes declaring a parameter or return type of <code>long</code>, |
| * calling a method that takes or returns a <code>long</code>, or accessing a |
| * <code>long</code> field. |
| * |
| * <p> |
| * The reason for the restriction is that Java long values are not represented |
| * as numeric values in compiled code, but as opaque Objects. Attempting to |
| * perform math operations on them would produce undesirable results. |
| * </p> |
| * <p> |
| * Use this annotation with care; the only safe thing to do with |
| * <code>long</code> values in JSNI code is to pass them back into Java |
| * unaltered. |
| * </p> |
| */ |
| @Target(ElementType.METHOD) |
| @Retention(RetentionPolicy.SOURCE) |
| public @interface UnsafeNativeLong { |
| } |