jdk8-mips64-public/langtools: src/share/classes/javax/lang/model/util/AbstractTypeVisitor7.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

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     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.lang.model.type.*;

    30 /**

    31  * A skeletal visitor of types with default behavior appropriate for

    32  * the {@link javax.lang.model.SourceVersion#RELEASE_7 RELEASE_7}

    33  * source version.

    34  *

    35  * <p> <b>WARNING:</b> The {@code TypeVisitor} interface implemented

    36  * by this class may have methods added to it in the future to

    37  * accommodate new, currently unknown, language structures added to

    38  * future versions of the Java&trade; programming language.

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

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

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

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

    43  *

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

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

    46  * #visitUnknown visitUnknown} method.  A new abstract type visitor

    47  * class will also be introduced to correspond to the new language

    48  * level; this visitor will have different default behavior for the

    49  * visit method in question.  When the new visitor is introduced, all

    50  * or portions of this visitor may be deprecated.

    51  *

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

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

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

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

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

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

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

    59  * in this situation.

    60  *

    61  * @param <R> the return type of this visitor's methods.  Use {@link

    62  *            Void} for visitors that do not need to return results.

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

    64  *            methods.  Use {@code Void} for visitors that do not need an

    65  *            additional parameter.

    66  *

    67  * @see AbstractTypeVisitor6

    68  * @see AbstractTypeVisitor8

    69  * @since 1.7

    70  */

    71 public abstract class AbstractTypeVisitor7<R, P> extends AbstractTypeVisitor6<R, P> {

    72     /**

    73      * Constructor for concrete subclasses to call.

    74      */

    75     protected AbstractTypeVisitor7() {

    76         super();

    77     }

    79     /**

    80      * Visits a {@code UnionType} in a manner defined by a subclass.

    81      *

    82      * @param t  {@inheritDoc}

    83      * @param p  {@inheritDoc}

    84      * @return the result of the visit as defined by a subclass

    85      */

    86     public abstract R visitUnion(UnionType t, P p);

    87 }

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