1 /*
   2  * Copyright (c) 2010, 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.lang.model.element.*;
  29 import javax.annotation.processing.SupportedSourceVersion;
  30 import javax.lang.model.element.*;
  31 import static javax.lang.model.element.ElementKind.*;
  32 import static javax.lang.model.SourceVersion.*;
  33 import javax.lang.model.SourceVersion;
  34 
  35 
  36 /**
  37  * A skeletal visitor of program elements with default behavior
  38  * appropriate for the {@link SourceVersion#RELEASE_7 RELEASE_7}
  39  * source version.
  40  *
  41  * <p> <b>WARNING:</b> The {@code ElementVisitor} interface
  42  * implemented by this class may have methods added to it in the
  43  * future to accommodate new, currently unknown, language structures
  44  * added to future versions of the Java&trade; programming language.
  45  * Therefore, methods whose names begin with {@code "visit"} may be
  46  * added to this class in the future; to avoid incompatibilities,
  47  * classes which extend this class should not declare any instance
  48  * methods with names beginning with {@code "visit"}.
  49  *
  50  * <p>When such a new visit method is added, the default
  51  * implementation in this class will be to call the {@link
  52  * #visitUnknown visitUnknown} method.  A new abstract element visitor
  53  * class will also be introduced to correspond to the new language
  54  * level; this visitor will have different default behavior for the
  55  * visit method in question.  When the new visitor is introduced, all
  56  * or portions of this visitor may be deprecated.
  57  *
  58  * @param <R> the return type of this visitor's methods.  Use {@link
  59  *            Void} for visitors that do not need to return results.
  60  * @param <P> the type of the additional parameter to this visitor's
  61  *            methods.  Use {@code Void} for visitors that do not need an
  62  *            additional parameter.
  63  *
  64  * @see AbstractElementVisitor6
  65  * @since 1.7
  66  */
  67 @SupportedSourceVersion(RELEASE_7)
  68 public abstract class AbstractElementVisitor7<R, P> extends AbstractElementVisitor6<R, P> {
  69     /**
  70      * Constructor for concrete subclasses to call.
  71      */
  72     protected AbstractElementVisitor7(){
  73         super();
  74     }
  75 }