1 /*
   2  * Copyright (c) 2011, 2020, 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 javax.lang.model.type.IntersectionType;
  31 import static javax.lang.model.SourceVersion.*;
  32 
  33 /**
  34  * A simple visitor of types with default behavior appropriate for the
  35  * {@link SourceVersion#RELEASE_8 RELEASE_8} source version.
  36  *
  37  * Visit methods corresponding to {@code RELEASE_8} and earlier
  38  * language constructs call {@link #defaultAction defaultAction},
  39  * passing their arguments to {@code defaultAction}'s corresponding
  40  * parameters.
  41  *
  42  * @apiNote
  43  * Methods in this class may be overridden subject to their general
  44  * contract.
  45  *
  46  * @param <R> the return type of this visitor's methods.  Use {@link
  47  *            Void} for visitors that do not need to return results.
  48  * @param <P> the type of the additional parameter to this visitor's
  49  *            methods.  Use {@code Void} for visitors that do not need an
  50  *            additional parameter.
  51  *
  52  * @see <a href="SimpleTypeVisitor6.html#note_for_subclasses">
  53  * <strong>Compatibility note for subclasses</strong></a>
  54  * @see SimpleTypeVisitor6
  55  * @see SimpleTypeVisitor7
  56  * @see SimpleTypeVisitor9
  57  * @see SimpleTypeVisitor14
  58  * @since 1.8
  59  */
  60 @SupportedSourceVersion(RELEASE_8)
  61 public class SimpleTypeVisitor8<R, P> extends SimpleTypeVisitor7<R, P> {
  62     /**
  63      * Constructor for concrete subclasses; uses {@code null} for the
  64      * default value.
  65      */
  66     @SuppressWarnings("deprecation") // Superclass constructor deprecated
  67     protected SimpleTypeVisitor8(){
  68         super(null);
  69     }
  70 
  71     /**
  72      * Constructor for concrete subclasses; uses the argument for the
  73      * default value.
  74      *
  75      * @param defaultValue the value to assign to {@link #DEFAULT_VALUE}
  76      */
  77     @SuppressWarnings("deprecation") // Superclass constructor deprecated
  78     protected SimpleTypeVisitor8(R defaultValue){
  79         super(defaultValue);
  80     }
  81 
  82     /**
  83      * {@inheritDoc}
  84      *
  85      * @implSpec This implementation calls {@code defaultAction}.
  86      *
  87      * @param t {@inheritDoc}
  88      * @param p {@inheritDoc}
  89      * @return  the result of {@code defaultAction}
  90      */
  91     @Override
  92     public R visitIntersection(IntersectionType t, P p){
  93         return defaultAction(t, p);
  94     }
  95 }