SimpleAnnotationValueVisitor8.java revision 3884:b6960e2da008 
1/*
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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
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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).
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17 * You should have received a copy of the GNU General Public License version
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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25
26package javax.lang.model.util;
27
28import javax.annotation.processing.SupportedSourceVersion;
29import javax.lang.model.SourceVersion;
30import static javax.lang.model.SourceVersion.*;
31
32/**
33 * A simple visitor for annotation values with default behavior
34 * appropriate for the {@link SourceVersion#RELEASE_8 RELEASE_8}
35 * source version.  Visit methods call {@link #defaultAction
36 * defaultAction} passing their arguments to {@code defaultAction}'s
37 * corresponding parameters.
38 *
39 * <p> Methods in this class may be overridden subject to their
40 * general contract.  Note that annotating methods in concrete
41 * subclasses with {@link java.lang.Override @Override} will help
42 * ensure that methods are overridden as intended.
43 *
44 * <p> <b>WARNING:</b> The {@code AnnotationValueVisitor} interface
45 * implemented by this class may have methods added to it in the
46 * future to accommodate new, currently unknown, language structures
47 * added to future versions of the Java&trade; programming language.
48 * Therefore, methods whose names begin with {@code "visit"} may be
49 * added to this class in the future; to avoid incompatibilities,
50 * classes which extend this class should not declare any instance
51 * methods with names beginning with {@code "visit"}.
52 *
53 * <p>When such a new visit method is added, the default
54 * implementation in this class will be to call the {@link
55 * #visitUnknown visitUnknown} method.  A new simple annotation
56 * value visitor class will also be introduced to correspond to the
57 * new language level; this visitor will have different default
58 * behavior for the visit method in question.  When the new visitor is
59 * introduced, all or portions of this visitor may be deprecated.
60 *
61 * @param <R> the return type of this visitor's methods
62 * @param <P> the type of the additional parameter to this visitor's methods.
63 *
64 * @see SimpleAnnotationValueVisitor6
65 * @see SimpleAnnotationValueVisitor7
66 * @see SimpleAnnotationValueVisitor8
67 * @since 1.8
68 */
69@SupportedSourceVersion(RELEASE_8)
70public class SimpleAnnotationValueVisitor8<R, P> extends SimpleAnnotationValueVisitor7<R, P> {
71    /**
72     * Constructor for concrete subclasses; uses {@code null} for the
73     * default value.
74     */
75    protected SimpleAnnotationValueVisitor8() {
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 SimpleAnnotationValueVisitor8(R defaultValue) {
86        super(defaultValue);
87    }
88}
89