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 * accompanied this code).
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package javax.lang.model.util;

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



A skeletal visitor of program elements with default behavior appropriate for the RELEASE_9 source version. 
 WARNING: The ElementVisitor 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 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 call the visitUnknown method. A new abstract element 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 the new visitor is introduced, all or portions of this visitor may be deprecated. 
Type parameters:
  • <R> – the return type of this visitor's methods. Use Void for visitors that do not need to return results.
  • <P> – the type of the additional parameter to this visitor's methods. Use Void for visitors that do not need an additional parameter.
See Also:
Since:9
@specJPMS
/**
 * A skeletal visitor of program elements with default behavior
 * appropriate for the {@link SourceVersion#RELEASE_9 RELEASE_9}
 * source version.
 *
 * <p> <b>WARNING:</b> The {@code ElementVisitor} 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&trade; programming language.
 * Therefore, methods whose names begin with {@code "visit"} may be
 * added to this class in the future; to avoid incompatibilities,
 * classes which extend this class should not declare any instance
 * methods with names beginning with {@code "visit"}.
 *
 * <p>When such a new visit method is added, the default
 * implementation in this class will be to call the {@link
 * #visitUnknown visitUnknown} method.  A new abstract element 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 the new visitor is introduced, all
 * or portions of this visitor may be deprecated.
 *
 * @param <R> the return type of this visitor's methods.  Use {@link
 *            Void} for visitors that do not need to return results.
 * @param <P> the type of the additional parameter to this visitor's
 *            methods.  Use {@code Void} for visitors that do not need an
 *            additional parameter.
 *
 * @see AbstractElementVisitor6
 * @see AbstractElementVisitor7
 * @see AbstractElementVisitor8
 * @since 9
 * @spec JPMS
 */
@SupportedSourceVersion(RELEASE_9)
public abstract class AbstractElementVisitor9<R, P> extends AbstractElementVisitor8<R, P> {
    
Constructor for concrete subclasses to call.

/**
     * Constructor for concrete subclasses to call.
     */
    protected AbstractElementVisitor9(){
        super();
    }

    
Visits a ModuleElement in a manner defined by a subclass. 
Params:
  • t –  {@inheritDoc}
  • p –  {@inheritDoc}
Returns:the result of the visit as defined by a subclass
/**
     * Visits a {@code ModuleElement} in a manner defined by a
     * subclass.
     *
     * @param t  {@inheritDoc}
     * @param p  {@inheritDoc}
     * @return the result of the visit as defined by a subclass
     */
    @Override
    public abstract R visitModule(ModuleElement t, P p);
}