1 /* 2 * Copyright (c) 2005, 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 29 import java.util.List; 30 import javax.lang.model.element.*; 31 32 import javax.lang.model.type.TypeMirror; 33 import static javax.lang.model.SourceVersion.*; 34 import javax.lang.model.SourceVersion; 35 import javax.annotation.processing.SupportedSourceVersion; 36 37 /** 38 * A skeletal visitor for annotation values with default behavior 39 * appropriate for the {@link SourceVersion#RELEASE_6 RELEASE_6} 40 * source version. 41 * 42 * <p> <b>WARNING:</b> The {@code AnnotationValueVisitor} interface 43 * implemented by this class may have methods added to it in the 44 * future to accommodate new, currently unknown, language structures 45 * added to 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 abstract annotation 54 * value visitor class will also be introduced to correspond to the 55 * new language level; this visitor will have different default 56 * behavior for the visit method in question. When the new visitor is 57 * introduced, all or portions of this visitor may be deprecated. 58 * 59 * @param <R> the return type of this visitor's methods 60 * @param <P> the type of the additional parameter to this visitor's methods. 61 * 62 * @author Joseph D. Darcy 63 * @author Scott Seligman 64 * @author Peter von der Ahé 65 * 66 * @see AbstractAnnotationValueVisitor7 67 * @see AbstractAnnotationValueVisitor8 68 * @since 1.6 69 */ 70 @SupportedSourceVersion(RELEASE_6) 71 public abstract class AbstractAnnotationValueVisitor6<R, P> 72 implements AnnotationValueVisitor<R, P> { 73 74 /** 75 * Constructor for concrete subclasses to call. 76 */ 77 protected AbstractAnnotationValueVisitor6() {} 78 79 /** 80 * Visits an annotation value as if by passing itself to that 81 * value's {@link AnnotationValue#accept accept}. The invocation 82 * {@code v.visit(av)} is equivalent to {@code av.accept(v, p)}. 83 * @param av {@inheritDoc} 84 * @param p {@inheritDoc} 85 */ 86 public final R visit(AnnotationValue av, P p) { 87 return av.accept(this, p); 88 } 89 90 /** 91 * Visits an annotation value as if by passing itself to that 92 * value's {@link AnnotationValue#accept accept} method passing 93 * {@code null} for the additional parameter. The invocation 94 * {@code v.visit(av)} is equivalent to {@code av.accept(v, 95 * null)}. 96 * @param av {@inheritDoc} 97 */ 98 public final R visit(AnnotationValue av) { 99 return av.accept(this, null); 100 } 101 102 /** 103 * {@inheritDoc} 104 * 105 * <p>The default implementation of this method in {@code 106 * AbstractAnnotationValueVisitor6} will always throw {@code 107 * UnknownAnnotationValueException}. This behavior is not 108 * required of a subclass. 109 * 110 * @param av {@inheritDoc} 111 * @param p {@inheritDoc} 112 */ 113 public R visitUnknown(AnnotationValue av, P p) { 114 throw new UnknownAnnotationValueException(av, p); 115 } 116 }