AbstractAnnotationValueVisitor8.java revision 2571:10fc81ac75b4 
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25
26package javax.lang.model.util;
27
28import static javax.lang.model.SourceVersion.*;
29import javax.lang.model.SourceVersion;
30import javax.annotation.processing.SupportedSourceVersion;
31
32/**
33 * A skeletal visitor for annotation values with default behavior
34 * appropriate for the {@link SourceVersion#RELEASE_8 RELEASE_8}
35 * source version.
36 *
37 * <p> <b>WARNING:</b> The {@code AnnotationValueVisitor} interface
38 * implemented by this class may have methods added to it in the
39 * future to accommodate new, currently unknown, language structures
40 * added to future versions of the Java&trade; programming language.
41 * Therefore, methods whose names begin with {@code "visit"} may be
42 * added to this class in the future; to avoid incompatibilities,
43 * classes which extend this class should not declare any instance
44 * methods with names beginning with {@code "visit"}.
45 *
46 * <p>When such a new visit method is added, the default
47 * implementation in this class will be to call the {@link
48 * #visitUnknown visitUnknown} method.  A new abstract annotation
49 * value visitor class will also be introduced to correspond to the
50 * new language level; this visitor will have different default
51 * behavior for the visit method in question.  When the new visitor is
52 * introduced, all or portions of this visitor may be deprecated.
53 *
54 * <p>Note that adding a default implementation of a new visit method
55 * in a visitor class will occur instead of adding a <em>default
56 * method</em> directly in the visitor interface since a Java SE 8
57 * language feature cannot be used to this version of the API since
58 * this version is required to be runnable on Java SE 7
59 * implementations.  Future versions of the API that are only required
60 * to run on Java SE 8 and later may take advantage of default methods
61 * in this situation.
62 *
63 * @param <R> the return type of this visitor's methods
64 * @param <P> the type of the additional parameter to this visitor's methods.
65 *
66 * @see AbstractAnnotationValueVisitor6
67 * @see AbstractAnnotationValueVisitor7
68 * @see AbstractAnnotationValueVisitor9
69 * @since 1.8
70 */
71@SupportedSourceVersion(RELEASE_8)
72public abstract class AbstractAnnotationValueVisitor8<R, P> extends AbstractAnnotationValueVisitor7<R, P> {
73
74    /**
75     * Constructor for concrete subclasses to call.
76     */
77    protected AbstractAnnotationValueVisitor8() {
78        super();
79    }
80}
81