1 /* 2 * Copyright (c) 2011, 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.type.*; 29 import javax.annotation.processing.SupportedSourceVersion; 30 import javax.lang.model.SourceVersion; 31 import static javax.lang.model.SourceVersion.*; 32 33 /** 34 * A simple visitor of types with default behavior appropriate for the 35 * {@linkplain SourceVersion#latest latest} source version. 36 * 37 * <p> Methods in this class may be overridden subject to their 38 * general contract. Note that annotating methods in concrete 39 * subclasses with {@link java.lang.Override @Override} will help 40 * ensure that methods are overridden as intended. 41 * 42 * <p> <b>WARNING:</b> The {@code TypeVisitor} interface implemented 43 * by this class may have methods added to it in the future to 44 * accommodate new, currently unknown, language structures added to 45 * future versions of the Java™ programming language. 46 * Therefore, methods whose names begin with {@code "visit"} may be 47 * added to this class in the future; to avoid incompatibilities, 48 * classes which extend this class should not declare any instance 49 * methods with names beginning with {@code "visit"}. 50 * 51 * <p>When such a new visit method is added, the default 52 * implementation in this class will be to call the {@link 53 * #visitUnknown visitUnknown} method. A new simple type visitor 54 * class will also be introduced to correspond to the new language 55 * level; this visitor will have different default behavior for the 56 * visit method in question. When the new visitor is introduced, all 57 * or portions of this visitor may be deprecated. 58 * 59 * @param <R> the return type of this visitor's methods. Use {@link 60 * Void} for visitors that do not need to return results. 61 * @param <P> the type of the additional parameter to this visitor's 62 * methods. Use {@code Void} for visitors that do not need an 63 * additional parameter. 64 * 65 * @see SimpleTypeVisitor6 66 * @see SimpleTypeVisitor7 67 * @see SimpleTypeVisitor8 68 * @since 1.8 69 */ 70 @SupportedSourceVersion(RELEASE_8) 71 public class LatestSimpleTypeVisitor<R, P> extends SimpleTypeVisitor8<R, P> { 72 /** 73 * Constructor for concrete subclasses; uses {@code null} for the 74 * default value. 75 */ 76 protected LatestSimpleTypeVisitor(){ 77 super(null); 78 } 79 80 /** 81 * Constructor for concrete subclasses; uses the argument for the 82 * default value. 83 * 84 * @param defaultValue the value to assign to {@link #DEFAULT_VALUE} 85 */ 86 protected LatestSimpleTypeVisitor(R defaultValue){ 87 super(defaultValue); 88 } 89 }