src/share/classes/javax/lang/model/util/TypeKindVisitor7.java

Tue, 09 Oct 2012 19:10:00 -0700

author
jjg
date
Tue, 09 Oct 2012 19:10:00 -0700
changeset 1357
c75be5bc5283
parent 1054
111bbf1ad913
child 1522
09f65aad4759
permissions
-rw-r--r--

8000663: clean up langtools imports
Reviewed-by: darcy

darcy@575 1 /*
jjg@1357 2 * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
darcy@575 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
darcy@575 4 *
darcy@575 5 * This code is free software; you can redistribute it and/or modify it
darcy@575 6 * under the terms of the GNU General Public License version 2 only, as
darcy@575 7 * published by the Free Software Foundation. Oracle designates this
darcy@575 8 * particular file as subject to the "Classpath" exception as provided
darcy@575 9 * by Oracle in the LICENSE file that accompanied this code.
darcy@575 10 *
darcy@575 11 * This code is distributed in the hope that it will be useful, but WITHOUT
darcy@575 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
darcy@575 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
darcy@575 14 * version 2 for more details (a copy is included in the LICENSE file that
darcy@575 15 * accompanied this code).
darcy@575 16 *
darcy@575 17 * You should have received a copy of the GNU General Public License version
darcy@575 18 * 2 along with this work; if not, write to the Free Software Foundation,
darcy@575 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
darcy@575 20 *
darcy@575 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
darcy@575 22 * or visit www.oracle.com if you need additional information or have any
darcy@575 23 * questions.
darcy@575 24 */
darcy@575 25
darcy@575 26 package javax.lang.model.util;
darcy@575 27
darcy@575 28 import javax.lang.model.type.*;
darcy@575 29 import javax.annotation.processing.SupportedSourceVersion;
darcy@575 30 import static javax.lang.model.SourceVersion.*;
darcy@575 31 import javax.lang.model.SourceVersion;
darcy@575 32
darcy@575 33 /**
darcy@575 34 * A visitor of types based on their {@linkplain TypeKind kind} with
darcy@575 35 * default behavior appropriate for the {@link SourceVersion#RELEASE_7
darcy@575 36 * RELEASE_7} source version. For {@linkplain
darcy@575 37 * TypeMirror types} <tt><i>XYZ</i></tt> that may have more than one
darcy@575 38 * kind, the <tt>visit<i>XYZ</i></tt> methods in this class delegate
darcy@575 39 * to the <tt>visit<i>XYZKind</i></tt> method corresponding to the
darcy@575 40 * first argument's kind. The <tt>visit<i>XYZKind</i></tt> methods
darcy@575 41 * call {@link #defaultAction defaultAction}, passing their arguments
darcy@575 42 * to {@code defaultAction}'s corresponding parameters.
darcy@575 43 *
darcy@575 44 * <p> Methods in this class may be overridden subject to their
darcy@575 45 * general contract. Note that annotating methods in concrete
darcy@575 46 * subclasses with {@link java.lang.Override @Override} will help
darcy@575 47 * ensure that methods are overridden as intended.
darcy@575 48 *
darcy@575 49 * <p> <b>WARNING:</b> The {@code TypeVisitor} interface implemented
darcy@575 50 * by this class may have methods added to it in the future to
darcy@575 51 * accommodate new, currently unknown, language structures added to
darcy@575 52 * future versions of the Java&trade; programming language.
darcy@575 53 * Therefore, methods whose names begin with {@code "visit"} may be
darcy@575 54 * added to this class in the future; to avoid incompatibilities,
darcy@575 55 * classes which extend this class should not declare any instance
darcy@575 56 * methods with names beginning with {@code "visit"}.
darcy@575 57 *
darcy@575 58 * <p>When such a new visit method is added, the default
darcy@575 59 * implementation in this class will be to call the {@link
darcy@575 60 * #visitUnknown visitUnknown} method. A new type kind visitor class
darcy@575 61 * will also be introduced to correspond to the new language level;
darcy@575 62 * this visitor will have different default behavior for the visit
darcy@575 63 * method in question. When the new visitor is introduced, all or
darcy@575 64 * portions of this visitor may be deprecated.
darcy@575 65 *
darcy@575 66 * @param <R> the return type of this visitor's methods. Use {@link
darcy@575 67 * Void} for visitors that do not need to return results.
darcy@575 68 * @param <P> the type of the additional parameter to this visitor's
darcy@575 69 * methods. Use {@code Void} for visitors that do not need an
darcy@575 70 * additional parameter.
darcy@575 71 *
darcy@575 72 * @see TypeKindVisitor6
darcy@1054 73 * @see TypeKindVisitor8
darcy@575 74 * @since 1.7
darcy@575 75 */
darcy@575 76 @SupportedSourceVersion(RELEASE_7)
darcy@575 77 public class TypeKindVisitor7<R, P> extends TypeKindVisitor6<R, P> {
darcy@575 78 /**
darcy@575 79 * Constructor for concrete subclasses to call; uses {@code null}
darcy@575 80 * for the default value.
darcy@575 81 */
darcy@575 82 protected TypeKindVisitor7() {
darcy@575 83 super(null);
darcy@575 84 }
darcy@575 85
darcy@575 86 /**
darcy@575 87 * Constructor for concrete subclasses to call; uses the argument
darcy@575 88 * for the default value.
darcy@575 89 *
darcy@575 90 * @param defaultValue the value to assign to {@link #DEFAULT_VALUE}
darcy@575 91 */
darcy@575 92 protected TypeKindVisitor7(R defaultValue) {
darcy@575 93 super(defaultValue);
darcy@575 94 }
darcy@851 95
darcy@851 96 /**
darcy@969 97 * This implementation visits a {@code UnionType} by calling
darcy@851 98 * {@code defaultAction}.
darcy@851 99 *
darcy@851 100 * @param t {@inheritDoc}
darcy@851 101 * @param p {@inheritDoc}
darcy@851 102 * @return the result of {@code defaultAction}
darcy@851 103 */
darcy@851 104 @Override
darcy@969 105 public R visitUnion(UnionType t, P p) {
darcy@851 106 return defaultAction(t, p);
darcy@851 107 }
darcy@575 108 }

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