1 /*

     2  * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package javax.lang.model.util;

    27 

    28 import javax.annotation.processing.SupportedSourceVersion;

    29 import javax.lang.model.SourceVersion;

    30 import static javax.lang.model.SourceVersion.*;

    31 

    32 

    33 /**

    34  * A skeletal visitor of program elements with default behavior

    35  * appropriate for the {@link SourceVersion#RELEASE_9 RELEASE_9}

    36  * source version.

    37  *

    38  * <p> <b>WARNING:</b> The {@code ElementVisitor} interface

    39  * implemented by this class may have methods added to it in the

    40  * future to accommodate new, currently unknown, language structures

    41  * added to future versions of the Java™ programming language.

    42  * Therefore, methods whose names begin with {@code "visit"} may be

    43  * added to this class in the future; to avoid incompatibilities,

    44  * classes which extend this class should not declare any instance

    45  * methods with names beginning with {@code "visit"}.

    46  *

    47  * <p>When such a new visit method is added, the default

    48  * implementation in this class will be to call the {@link

    49  * #visitUnknown visitUnknown} method.  A new abstract element visitor

    50  * class will also be introduced to correspond to the new language

    51  * level; this visitor will have different default behavior for the

    52  * visit method in question.  When the new visitor is introduced, all

    53  * or portions of this visitor may be deprecated.

    54  *

    55  * @param <R> the return type of this visitor's methods.  Use {@link

    56  *            Void} for visitors that do not need to return results.

    57  * @param <P> the type of the additional parameter to this visitor's

    58  *            methods.  Use {@code Void} for visitors that do not need an

    59  *            additional parameter.

    60  *

    61  * @see AbstractElementVisitor6

    62  * @see AbstractElementVisitor7

    63  * @see AbstractElementVisitor8

    64  * @since 1.9

    65  */

    66 @SupportedSourceVersion(RELEASE_9)

    67 public abstract class AbstractElementVisitor9<R, P> extends AbstractElementVisitor8<R, P> {

    68     /**

    69      * Constructor for concrete subclasses to call.

    70      */

    71     protected AbstractElementVisitor9(){

    72         super();

    73     }

    74 }