jdk8-mips64-public/langtools: src/share/classes/javax/lang/model/util/AbstractAnnotationValueVisitor6.java@c75be5bc5283

     1 /*

     2  * Copyright (c) 2005, 2012, 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  */

    26 package javax.lang.model.util;

    29 import javax.lang.model.element.*;

    31 import static javax.lang.model.SourceVersion.*;

    32 import javax.lang.model.SourceVersion;

    33 import javax.annotation.processing.SupportedSourceVersion;

    35 /**

    36  * A skeletal visitor for annotation values with default behavior

    37  * appropriate for the {@link SourceVersion#RELEASE_6 RELEASE_6}

    38  * source version.

    39  *

    40  * <p> <b>WARNING:</b> The {@code AnnotationValueVisitor} interface

    41  * implemented by this class may have methods added to it in the

    42  * future to accommodate new, currently unknown, language structures

    43  * added to future versions of the Java&trade; programming language.

    44  * Therefore, methods whose names begin with {@code "visit"} may be

    45  * added to this class in the future; to avoid incompatibilities,

    46  * classes which extend this class should not declare any instance

    47  * methods with names beginning with {@code "visit"}.

    48  *

    49  * <p>When such a new visit method is added, the default

    50  * implementation in this class will be to call the {@link

    51  * #visitUnknown visitUnknown} method.  A new abstract annotation

    52  * value visitor class will also be introduced to correspond to the

    53  * new language level; this visitor will have different default

    54  * behavior for the visit method in question.  When the new visitor is

    55  * introduced, all or portions of this visitor may be deprecated.

    56  *

    57  * @param <R> the return type of this visitor's methods

    58  * @param <P> the type of the additional parameter to this visitor's methods.

    59  *

    60  * @author Joseph D. Darcy

    61  * @author Scott Seligman

    62  * @author Peter von der Ah&eacute;

    63  *

    64  * @see AbstractAnnotationValueVisitor7

    65  * @see AbstractAnnotationValueVisitor8

    66  * @since 1.6

    67  */

    68 @SupportedSourceVersion(RELEASE_6)

    69 public abstract class AbstractAnnotationValueVisitor6<R, P>

    70     implements AnnotationValueVisitor<R, P> {

    72     /**

    73      * Constructor for concrete subclasses to call.

    74      */

    75     protected AbstractAnnotationValueVisitor6() {}

    77     /**

    78      * Visits an annotation value as if by passing itself to that

    79      * value's {@link AnnotationValue#accept accept}.  The invocation

    80      * {@code v.visit(av)} is equivalent to {@code av.accept(v, p)}.

    81      * @param av {@inheritDoc}

    82      * @param p  {@inheritDoc}

    83      */

    84     public final R visit(AnnotationValue av, P p) {

    85         return av.accept(this, p);

    86     }

    88     /**

    89      * Visits an annotation value as if by passing itself to that

    90      * value's {@link AnnotationValue#accept accept} method passing

    91      * {@code null} for the additional parameter.  The invocation

    92      * {@code v.visit(av)} is equivalent to {@code av.accept(v,

    93      * null)}.

    94      * @param av {@inheritDoc}

    95      */

    96     public final R visit(AnnotationValue av) {

    97         return av.accept(this, null);

    98     }

   100     /**

   101      * {@inheritDoc}

   102      *

   103      * <p>The default implementation of this method in {@code

   104      * AbstractAnnotationValueVisitor6} will always throw {@code

   105      * UnknownAnnotationValueException}.  This behavior is not

   106      * required of a subclass.

   107      *

   108      * @param av {@inheritDoc}

   109      * @param p  {@inheritDoc}

   110      */

   111     public R visitUnknown(AnnotationValue av, P p) {

   112         throw new UnknownAnnotationValueException(av, p);

   113     }

   114 }

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