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package javax.lang.model.util;


import javax.lang.model.element.*;

import static javax.lang.model.SourceVersion.*;
import javax.lang.model.SourceVersion;
import javax.annotation.processing.SupportedSourceVersion;


A skeletal visitor for annotation values with default behavior appropriate for the RELEASE_6 source version. 
Author:Joseph D. Darcy, Scott Seligman, Peter von der Ahé
Type parameters:
  • <R> – the return type of this visitor's methods
  • <P> – the type of the additional parameter to this visitor's methods.
See Also:
API Note:

WARNING: The 
AnnotationValueVisitor interface implemented by this class may have methods added to it in the future to accommodate new, currently unknown, language structures added to future versions of the Java programming language. Therefore, methods whose names begin with "visit" may be added to this class in the future; to avoid incompatibilities, classes and subclasses which extend this class should not declare any instance methods with names beginning with "visit".


When such a new visit method is added, the default implementation in this class will be to directly or indirectly call the visitUnknown method. A new abstract annotation value visitor class will also be introduced to correspond to the new language level; this visitor will have different default behavior for the visit method in question. When a new visitor is introduced, portions of this visitor class may be deprecated, including its constructors.
Since:1.6
/**
 * A skeletal visitor for annotation values with default behavior
 * appropriate for the {@link SourceVersion#RELEASE_6 RELEASE_6}
 * source version.
 *
 * @apiNote
 * <p id=note_for_subclasses><strong>WARNING:</strong> The {@code
 * AnnotationValueVisitor} interface implemented by this class may
 * have methods added to it in the future to accommodate new,
 * currently unknown, language structures added to future versions of
 * the Java programming language.  Therefore, methods whose
 * names begin with {@code "visit"} may be added to this class in the
 * future; to avoid incompatibilities, classes and subclasses which
 * extend this class should not declare any instance methods with
 * names beginning with {@code "visit"}.</p>
 *
 * <p>When such a new visit method is added, the default
 * implementation in this class will be to directly or indirectly call
 * the {@link #visitUnknown visitUnknown} method.  A new abstract
 * annotation value visitor class will also be introduced to
 * correspond to the new language level; this visitor will have
 * different default behavior for the visit method in question.  When
 * a new visitor is introduced, portions of this visitor class may be
 * deprecated, including its constructors.
 *
 * @param <R> the return type of this visitor's methods
 * @param <P> the type of the additional parameter to this visitor's methods.
 *
 * @author Joseph D. Darcy
 * @author Scott Seligman
 * @author Peter von der Ah&eacute;
 *
 * @see AbstractAnnotationValueVisitor7
 * @see AbstractAnnotationValueVisitor8
 * @see AbstractAnnotationValueVisitor9
 * @see AbstractAnnotationValueVisitor14
 * @since 1.6
 */
@SupportedSourceVersion(RELEASE_6)
public abstract class AbstractAnnotationValueVisitor6<R, P>
    implements AnnotationValueVisitor<R, P> {

    
Constructor for concrete subclasses to call.

Deprecated:Release 6 is obsolete; update to a visitor for a newer
release level.
/**
     * Constructor for concrete subclasses to call.
     * @deprecated Release 6 is obsolete; update to a visitor for a newer
     * release level.
     */
    @Deprecated(since="9")
    protected AbstractAnnotationValueVisitor6() {}

    
Visits any annotation value as if by passing itself to that value's accept. The invocation v.visit(av, p) is equivalent to av.accept(v, p). 
Params:
  • av – {@inheritDoc}
  • p –  {@inheritDoc}
Returns:  {@inheritDoc}
/**
     * Visits any annotation value as if by passing itself to that
     * value's {@link AnnotationValue#accept accept}.  The invocation
     * {@code v.visit(av, p)} is equivalent to {@code av.accept(v, p)}.
     * @param av {@inheritDoc}
     * @param p  {@inheritDoc}
     * @return   {@inheritDoc}
     */
    public final R visit(AnnotationValue av, P p) {
        return av.accept(this, p);
    }

    
Visits an annotation value as if by passing itself to that value's accept method passing null for the additional parameter. The invocation v.visit(av) is equivalent to av.accept(v,
null). 
Params:
  • av – {@inheritDoc}
Returns:  {@inheritDoc}
/**
     * Visits an annotation value as if by passing itself to that
     * value's {@link AnnotationValue#accept accept} method passing
     * {@code null} for the additional parameter.  The invocation
     * {@code v.visit(av)} is equivalent to {@code av.accept(v,
     * null)}.
     * @param av {@inheritDoc}
     * @return   {@inheritDoc}
     */
    public final R visit(AnnotationValue av) {
        return av.accept(this, null);
    }

    
{@inheritDoc}

Params:
  • av – {@inheritDoc}
  • p –  {@inheritDoc}
Implementation Requirements:The default implementation of this method in 
AbstractAnnotationValueVisitor6 will always throw 
new UnknownAnnotationValueException(av, p). This behavior is not required of a subclass.
Returns:  {@inheritDoc}
/**
     * {@inheritDoc}
     *
     * @implSpec The default implementation of this method in {@code
     * AbstractAnnotationValueVisitor6} will always throw {@code
     * new UnknownAnnotationValueException(av, p)}.  This behavior is not
     * required of a subclass.
     *
     * @param av {@inheritDoc}
     * @param p  {@inheritDoc}
     * @return   {@inheritDoc}
     */
    @Override
    public R visitUnknown(AnnotationValue av, P p) {
        throw new UnknownAnnotationValueException(av, p);
    }
}