Mercurial > jdk8-mips64-public > langtools / file comparison
comparison: src/share/classes/javax/lang/model/util/AbstractTypeVisitor7.java
src/share/classes/javax/lang/model/util/AbstractTypeVisitor7.java
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| 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 */ | |
| 25 | |
| 26 package javax.lang.model.util; | |
| 27 | |
| 28 import javax.lang.model.type.*; | |
| 29 | |
| 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™ 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 } | |
| 78 | |
| 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 } |
