1 /* 2 * Copyright (c) 2019, 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 skeletal visitor of program elements with default behavior 42 * appropriate for the {@link SourceVersion#RELEASE_14 RELEASE_14} 43 * source version. 44 * 45 * <p> <b>WARNING:</b> The {@code ElementVisitor} interface 46 * implemented by this class may have methods added to it in the 47 * future to accommodate new, currently unknown, language structures 48 * added to future versions of the Java™ programming language. 49 * Therefore, methods whose names begin with {@code "visit"} may be 50 * added to this class in the future; to avoid incompatibilities, 51 * classes which extend this class should not declare any instance 52 * methods with names beginning with {@code "visit"}. 53 * 54 * <p>When such a new visit method is added, the default 55 * implementation in this class will be to call the {@link 56 * #visitUnknown visitUnknown} method. A new abstract element visitor 57 * class will also be introduced to correspond to the new language 58 * level; this visitor will have different default behavior for the 59 * visit method in question. When the new visitor is introduced, all 60 * or portions of this visitor may be deprecated. 61 * 62 * @param <R> the return type of this visitor's methods. Use {@link 63 * Void} for visitors that do not need to return results. 64 * @param <P> the type of the additional parameter to this visitor's 65 * methods. Use {@code Void} for visitors that do not need an 66 * additional parameter. 67 * 68 * @see AbstractElementVisitor6 69 * @see AbstractElementVisitor7 70 * @see AbstractElementVisitor8 71 * @see AbstractElementVisitor9 72 * @since 14 73 */ 74 @jdk.internal.PreviewFeature(feature=jdk.internal.PreviewFeature.Feature.RECORDS, 75 essentialAPI=false) 76 @SupportedSourceVersion(RELEASE_15) 77 public abstract class AbstractElementVisitor14<R, P> extends AbstractElementVisitor9<R, P> { 78 /** 79 * Constructor for concrete subclasses to call. 80 */ 81 protected AbstractElementVisitor14(){ 82 super(); 83 } 84 85 /** 86 * {@inheritDoc} 87 * 88 * @implSpec Visits a {@code RecordComponentElement} in a manner defined by a 89 * subclass. 90 * 91 * @param t {@inheritDoc} 92 * @param p {@inheritDoc} 93 * @return {@inheritDoc} 94 */ 95 @SuppressWarnings("preview") 96 @Override 97 public abstract R visitRecordComponent(RecordComponentElement t, P p); 98 }