1 /*
   2  * Copyright (c) 2019, 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.element.RecordComponentElement;
  31 import static javax.lang.model.SourceVersion.*;
  32 
  33 /**
  34  * {@preview Associated with records, a preview feature of the Java language.
  35  *
  36  *           This class is associated with <i>records</i>, a preview
  37  *           feature of the Java language. Preview features
  38  *           may be removed in a future release, or upgraded to permanent
  39  *           features of the Java language.}
  40  *
  41  * A simple visitor of program elements with default behavior
  42  * appropriate for the {@link SourceVersion#RELEASE_14 RELEASE_14}
  43  * source version.
  44  *
  45  * Visit methods corresponding to {@code RELEASE_14} and earlier
  46  * language constructs call {@link #defaultAction defaultAction},
  47  * passing their arguments to {@code defaultAction}'s corresponding
  48  * parameters.
  49  *
  50  * @apiNote
  51  * Methods in this class may be overridden subject to their general
  52  * contract.
  53  *
  54  * @param <R> the return type of this visitor's methods.  Use {@code Void}
  55  *             for visitors that do not need to return results.
  56  * @param <P> the type of the additional parameter to this visitor's methods.  Use {@code Void}
  57  *              for visitors that do not need an additional parameter.
  58  *
  59  * @see <a href="SimpleElementVisitor6.html#note_for_subclasses">
  60  * <strong>Compatibility note for subclasses</strong></a>
  61  * @see SimpleElementVisitor6
  62  * @see SimpleElementVisitor7
  63  * @see SimpleElementVisitor8
  64  * @see SimpleElementVisitor9
  65  * @since 14
  66  */
  67 @jdk.internal.PreviewFeature(feature=jdk.internal.PreviewFeature.Feature.RECORDS,
  68                              essentialAPI=false)
  69 @SupportedSourceVersion(RELEASE_15)
  70 public class SimpleElementVisitor14<R, P> extends SimpleElementVisitor9<R, P> {
  71     /**
  72      * Constructor for concrete subclasses; uses {@code null} for the
  73      * default value.
  74      */
  75     protected SimpleElementVisitor14(){
  76         super(null);
  77     }
  78 
  79     /**
  80      * Constructor for concrete subclasses; uses the argument for the
  81      * default value.
  82      *
  83      * @param defaultValue the value to assign to {@link #DEFAULT_VALUE}
  84      */
  85     protected SimpleElementVisitor14(R defaultValue){
  86         super(defaultValue);
  87     }
  88 
  89     /**
  90      * {@inheritDoc}
  91      *
  92      * @implSpec Visits a {@code RecordComponentElement} by calling {@code
  93      * defaultAction}.
  94      *
  95      * @param e the element to visit
  96      * @param p a visitor-specified parameter
  97      * @return  {@inheritDoc}
  98      */
  99     @SuppressWarnings("preview")
 100     @Override
 101     public R visitRecordComponent(RecordComponentElement e, P p) {
 102         return defaultAction(e, p);
 103     }
 104 }