| /* |
| * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.lang.model.util; |
| |
| import javax.lang.model.element.*; |
| import javax.annotation.processing.SupportedSourceVersion; |
| import static javax.lang.model.SourceVersion.*; |
| import javax.lang.model.SourceVersion; |
| |
| /** |
| * A visitor of program elements based on their {@linkplain |
| * ElementKind kind} with default behavior appropriate for the {@link |
| * SourceVersion#RELEASE_9 RELEASE_9} source version. For {@linkplain |
| * Element elements} <tt><i>XYZ</i></tt> that may have more than one |
| * kind, the <tt>visit<i>XYZ</i></tt> methods in this class delegate |
| * to the <tt>visit<i>XYZKind</i></tt> method corresponding to the |
| * first argument's kind. The <tt>visit<i>XYZKind</i></tt> methods |
| * call {@link #defaultAction defaultAction}, passing their arguments |
| * to {@code defaultAction}'s corresponding parameters. |
| * |
| * <p> Methods in this class may be overridden subject to their |
| * general contract. Note that annotating methods in concrete |
| * subclasses with {@link java.lang.Override @Override} will help |
| * ensure that methods are overridden as intended. |
| * |
| * <p> <b>WARNING:</b> The {@code ElementVisitor} interface |
| * implemented by this class may have methods added to it or the |
| * {@code ElementKind} {@code enum} used in this case may have |
| * constants added to it in the future to accommodate new, currently |
| * unknown, language structures added to future versions of the |
| * Java™ programming language. Therefore, methods whose names |
| * begin with {@code "visit"} may be added to this class in the |
| * future; to avoid incompatibilities, classes which extend this class |
| * should not declare any instance methods with names beginning with |
| * {@code "visit"}. |
| * |
| * <p>When such a new visit method is added, the default |
| * implementation in this class will be to call the {@link |
| * #visitUnknown visitUnknown} method. A new abstract element kind |
| * visitor class will also be introduced to correspond to the new |
| * language level; this visitor will have different default behavior |
| * for the visit method in question. When the new visitor is |
| * introduced, all or portions of this visitor may be deprecated. |
| * |
| * @param <R> the return type of this visitor's methods. Use {@link |
| * Void} for visitors that do not need to return results. |
| * @param <P> the type of the additional parameter to this visitor's |
| * methods. Use {@code Void} for visitors that do not need an |
| * additional parameter. |
| * |
| * @see ElementKindVisitor6 |
| * @see ElementKindVisitor7 |
| * @see ElementKindVisitor8 |
| * @since 1.9 |
| */ |
| @SupportedSourceVersion(RELEASE_9) |
| public class ElementKindVisitor9<R, P> extends ElementKindVisitor8<R, P> { |
| /** |
| * Constructor for concrete subclasses; uses {@code null} for the |
| * default value. |
| */ |
| protected ElementKindVisitor9() { |
| super(null); |
| } |
| |
| /** |
| * Constructor for concrete subclasses; uses the argument for the |
| * default value. |
| * |
| * @param defaultValue the value to assign to {@link #DEFAULT_VALUE} |
| */ |
| protected ElementKindVisitor9(R defaultValue) { |
| super(defaultValue); |
| } |
| } |