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 }