jdk8-mips64-public/langtools: src/share/classes/javax/lang/model/util/SimpleAnnotationValueVisitor7.java@2eb010b6cb22

     1 /*

     2  * Copyright (c) 2010, 2013, 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;

    28 import javax.annotation.processing.SupportedSourceVersion;

    29 import javax.lang.model.SourceVersion;

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

    32 /**

    33  * A simple visitor for annotation values with default behavior

    34  * appropriate for the {@link SourceVersion#RELEASE_7 RELEASE_7}

    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  * <p>Note that adding a default implementation of a new visit method

    62  * in a visitor class will occur instead of adding a <em>default

    63  * method</em> directly in the visitor interface since a Java SE 8

    64  * language feature cannot be used to this version of the API since

    65  * this version is required to be runnable on Java SE 7

    66  * implementations.  Future versions of the API that are only required

    67  * to run on Java SE 8 and later may take advantage of default methods

    68  * in this situation.

    69  *

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

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

    72  *

    73  * @see SimpleAnnotationValueVisitor6

    74  * @see SimpleAnnotationValueVisitor8

    75  * @since 1.7

    76  */

    77 @SupportedSourceVersion(RELEASE_7)

    78 public class SimpleAnnotationValueVisitor7<R, P> extends SimpleAnnotationValueVisitor6<R, P> {

    79     /**

    80      * Constructor for concrete subclasses; uses {@code null} for the

    81      * default value.

    82      */

    83     protected SimpleAnnotationValueVisitor7() {

    84         super(null);

    85     }

    87     /**

    88      * Constructor for concrete subclasses; uses the argument for the

    89      * default value.

    90      *

    91      * @param defaultValue the value to assign to {@link #DEFAULT_VALUE}

    92      */

    93     protected SimpleAnnotationValueVisitor7(R defaultValue) {

    94         super(defaultValue);

    95     }

    96 }

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