| /******************************************************************************* |
| * Copyright (c) 2011 GK Software AG and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Stephan Herrmann - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.annotation; |
| |
| import static java.lang.annotation.ElementType.*; |
| import java.lang.annotation.*; |
| |
| /** |
| * Qualifier for a type in a method signature or a local variable declaration. |
| * The entity (return value, parameter, local variable) whose type has this |
| * annotation can never have the value <code>null</code> at runtime. |
| * <p> |
| * This has two consequences: |
| * <ul> |
| * <li>An attempt to bind a <code>null</code> value to the entity is a compile time error. |
| * Diagnostics issued by the compiler should distinguish three situations: |
| * <ul> |
| * <li>Nullness of the value can be statically determined.</li> |
| * <li>Nullness can not definitely be determined, because different code branches yield different results.</li> |
| * <li>Nullness can not be determined, because other program elements are involved for which |
| * null annotations are lacking.</li> |
| * </ul></li> |
| * <li>Dereferencing the entity is safe, i.e., no <code>NullPointerException</code> can occur at runtime.</li> |
| * </ul> |
| * </p> |
| * @author stephan |
| */ |
| @Retention(RetentionPolicy.CLASS) |
| @Target({METHOD,PARAMETER,LOCAL_VARIABLE}) |
| public @interface NonNull { |
| |
| } |