1 /*

     2  * Copyright (c) 2010, 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  */

    25 

    26 package javax.lang.model.util;

    27 

    28 import javax.lang.model.type.*;

    29 import javax.annotation.processing.SupportedSourceVersion;

    30 import javax.lang.model.SourceVersion;

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

    32 

    33 /**

    34  * A simple visitor of types with default behavior appropriate for the

    35  * {@link SourceVersion#RELEASE_7 RELEASE_7} source version.

    36  *

    37  * Visit methods corresponding to {@code RELEASE_7} language

    38  * constructs call {@link #defaultAction}, passing their arguments to

    39  * {@code defaultAction}'s corresponding parameters.

    40  *

    41  * <p> Methods in this class may be overridden subject to their

    42  * general contract.  Note that annotating methods in concrete

    43  * subclasses with {@link java.lang.Override @Override} will help

    44  * ensure that methods are overridden as intended.

    45  *

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

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

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

    49  * future versions of the Java™ programming language.

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

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

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

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

    54  *

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

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

    57  * #visitUnknown visitUnknown} method.  A new simple type visitor

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

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

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

    61  * or portions of this visitor may be deprecated.

    62  *

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

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

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

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

    67  *            additional parameter.

    68  *

    69  * @see SimpleTypeVisitor6

    70  * @since 1.7

    71  */

    72 @SupportedSourceVersion(RELEASE_7)

    73 public class SimpleTypeVisitor7<R, P> extends SimpleTypeVisitor6<R, P> {

    74     /**

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

    76      * default value.

    77      */

    78     protected SimpleTypeVisitor7(){

    79         super(null);

    80     }

    81 

    82     /**

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

    84      * default value.

    85      *

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

    87      */

    88     protected SimpleTypeVisitor7(R defaultValue){

    89         super(defaultValue);

    90     }

    91 }