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8225056: VM support for sealed classes 8227044: javax.lang.model for sealed classes 8227045: Preview APIs support for sealed classes 8227047: Javadoc for sealed types 8245854: JVM TI Specification for sealed classes Co-authored-by: Harold Seigel <harold.seigel@oracle.com> Co-authored-by: Jan Lahoda <jan.lahoda@oracle.com> Reviewed-by: mcimadamore, forax, darcy, dholmes, jlahoda, lfoltan, mchung, sspitsyn, vromero
110 lines
4.1 KiB
Java
110 lines
4.1 KiB
Java
/*
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* Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package javax.lang.model.element;
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/**
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* Represents a modifier on a program element such
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* as a class, method, or field.
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*
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* <p>Not all modifiers are applicable to all kinds of elements.
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* When two or more modifiers appear in the source code of an element
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* then it is customary, though not required, that they appear in the same
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* order as the constants listed in the detail section below.
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*
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* <p>Note that it is possible additional modifiers will be added in
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* future versions of the platform.
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*
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* @author Joseph D. Darcy
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* @author Scott Seligman
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* @author Peter von der Ahé
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* @since 1.6
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*/
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public enum Modifier {
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// See JLS sections 8.1.1, 8.3.1, 8.4.3, 8.8.3, and 9.1.1.
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// java.lang.reflect.Modifier includes INTERFACE, but that's a VMism.
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/** The modifier {@code public} */ PUBLIC,
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/** The modifier {@code protected} */ PROTECTED,
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/** The modifier {@code private} */ PRIVATE,
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/** The modifier {@code abstract} */ ABSTRACT,
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/**
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* The modifier {@code default}
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* @since 1.8
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*/
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DEFAULT,
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/** The modifier {@code static} */ STATIC,
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/**
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* {@preview Associated with sealed classes, a preview feature of the Java language.
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*
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* This enum constant is associated with <i>sealed classes</i>, a preview
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* feature of the Java language. Preview features
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* may be removed in a future release, or upgraded to permanent
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* features of the Java language.}
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*
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* The modifier {@code sealed}
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* @since 15
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*/
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@jdk.internal.PreviewFeature(feature=jdk.internal.PreviewFeature.Feature.SEALED_CLASSES,
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essentialAPI=false)
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SEALED,
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/**
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* {@preview Associated with sealed classes, a preview feature of the Java language.
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*
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* This enum constant is associated with <i>sealed classes</i>, a preview
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* feature of the Java language. Preview features
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* may be removed in a future release, or upgraded to permanent
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* features of the Java language.}
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*
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* The modifier {@code non-sealed}
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* @since 15
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*/
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@jdk.internal.PreviewFeature(feature=jdk.internal.PreviewFeature.Feature.SEALED_CLASSES,
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essentialAPI=false)
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NON_SEALED {
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public String toString() {
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return "non-sealed";
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}
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},
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/** The modifier {@code final} */ FINAL,
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/** The modifier {@code transient} */ TRANSIENT,
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/** The modifier {@code volatile} */ VOLATILE,
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/** The modifier {@code synchronized} */ SYNCHRONIZED,
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/** The modifier {@code native} */ NATIVE,
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/** The modifier {@code strictfp} */ STRICTFP;
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/**
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* Returns this modifier's name in lowercase.
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*/
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public String toString() {
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return name().toLowerCase(java.util.Locale.US);
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}
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}
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