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src/share/classes/javax/lang/model/util/SimpleElementVisitor8.java@2eb010b6cb22 (annotated)

src/share/classes/javax/lang/model/util/SimpleElementVisitor8.java

Thu, 31 Aug 2017 15:17:03 +0800

author

aoqi

date

Thu, 31 Aug 2017 15:17:03 +0800

changeset 2525

2eb010b6cb22

parent 1522

09f65aad4759

parent 0

959103a6100f

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26	package javax.lang.model.util;
aoqi@0	27
aoqi@0	28	import javax.annotation.processing.SupportedSourceVersion;
aoqi@0	29	import javax.lang.model.SourceVersion;
aoqi@0	30	import static javax.lang.model.SourceVersion.*;
aoqi@0	31
aoqi@0	32	/**
aoqi@0	33	* A simple visitor of program elements with default behavior
aoqi@0	34	* appropriate for the {@link SourceVersion#RELEASE_8 RELEASE_8}
aoqi@0	35	* source version.
aoqi@0	36	*
aoqi@0	37	* Visit methods corresponding to {@code RELEASE_7} and earlier
aoqi@0	38	* language constructs call {@link #defaultAction defaultAction},
aoqi@0	39	* passing their arguments to {@code defaultAction}'s corresponding
aoqi@0	40	* parameters.
aoqi@0	41	*
aoqi@0	42	* <p> Methods in this class may be overridden subject to their
aoqi@0	43	* general contract. Note that annotating methods in concrete
aoqi@0	44	* subclasses with {@link java.lang.Override @Override} will help
aoqi@0	45	* ensure that methods are overridden as intended.
aoqi@0	46	*
aoqi@0	47	* <p> <b>WARNING:</b> The {@code ElementVisitor} interface
aoqi@0	48	* implemented by this class may have methods added to it in the
aoqi@0	49	* future to accommodate new, currently unknown, language structures
aoqi@0	50	* added to future versions of the Java&trade; programming language.
aoqi@0	51	* Therefore, methods whose names begin with {@code "visit"} may be
aoqi@0	52	* added to this class in the future; to avoid incompatibilities,
aoqi@0	53	* classes which extend this class should not declare any instance
aoqi@0	54	* methods with names beginning with {@code "visit"}.
aoqi@0	55	*
aoqi@0	56	* <p>When such a new visit method is added, the default
aoqi@0	57	* implementation in this class will be to call the {@link
aoqi@0	58	* #visitUnknown visitUnknown} method. A new simple element visitor
aoqi@0	59	* class will also be introduced to correspond to the new language
aoqi@0	60	* level; this visitor will have different default behavior for the
aoqi@0	61	* visit method in question. When the new visitor is introduced, all
aoqi@0	62	* or portions of this visitor may be deprecated.
aoqi@0	63	*
aoqi@0	64	* <p>Note that adding a default implementation of a new visit method
aoqi@0	65	* in a visitor class will occur instead of adding a <em>default
aoqi@0	66	* method</em> directly in the visitor interface since a Java SE 8
aoqi@0	67	* language feature cannot be used to this version of the API since
aoqi@0	68	* this version is required to be runnable on Java SE 7
aoqi@0	69	* implementations. Future versions of the API that are only required
aoqi@0	70	* to run on Java SE 8 and later may take advantage of default methods
aoqi@0	71	* in this situation.
aoqi@0	72	*
aoqi@0	73	* @param <R> the return type of this visitor's methods. Use {@code Void}
aoqi@0	74	* for visitors that do not need to return results.
aoqi@0	75	* @param <P> the type of the additional parameter to this visitor's methods. Use {@code Void}
aoqi@0	76	* for visitors that do not need an additional parameter.
aoqi@0	77	*
aoqi@0	78	* @see SimpleElementVisitor6
aoqi@0	79	* @see SimpleElementVisitor7
aoqi@0	80	* @since 1.8
aoqi@0	81	*/
aoqi@0	82	@SupportedSourceVersion(RELEASE_8)
aoqi@0	83	public class SimpleElementVisitor8<R, P> extends SimpleElementVisitor7<R, P> {
aoqi@0	84	/**
aoqi@0	85	* Constructor for concrete subclasses; uses {@code null} for the
aoqi@0	86	* default value.
aoqi@0	87	*/
aoqi@0	88	protected SimpleElementVisitor8(){
aoqi@0	89	super(null);
aoqi@0	90	}
aoqi@0	91
aoqi@0	92	/**
aoqi@0	93	* Constructor for concrete subclasses; uses the argument for the
aoqi@0	94	* default value.
aoqi@0	95	*
aoqi@0	96	* @param defaultValue the value to assign to {@link #DEFAULT_VALUE}
aoqi@0	97	*/
aoqi@0	98	protected SimpleElementVisitor8(R defaultValue){
aoqi@0	99	super(defaultValue);
aoqi@0	100	}
aoqi@0	101	}