001///////////////////////////////////////////////////////////////////////////////////////////////
002// checkstyle: Checks Java source code and other text files for adherence to a set of rules.
003// Copyright (C) 2001-2024 the original author or authors.
004//
005// This library is free software; you can redistribute it and/or
006// modify it under the terms of the GNU Lesser General Public
007// License as published by the Free Software Foundation; either
008// version 2.1 of the License, or (at your option) any later version.
009//
010// This library is distributed in the hope that it will be useful,
011// but WITHOUT ANY WARRANTY; without even the implied warranty of
012// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013// Lesser General Public License for more details.
014//
015// You should have received a copy of the GNU Lesser General Public
016// License along with this library; if not, write to the Free Software
017// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
018///////////////////////////////////////////////////////////////////////////////////////////////
019
020package com.puppycrawl.tools.checkstyle;
021
022import java.lang.annotation.ElementType;
023import java.lang.annotation.Inherited;
024import java.lang.annotation.Retention;
025import java.lang.annotation.RetentionPolicy;
026import java.lang.annotation.Target;
027
028/**
029 * This annotation means that the check does not contain mutable state and
030 * may be safely used from others threads at the same time.
031 * The check does not contain mutable state, if it does not change any field values at the
032 * execution stage (but it still can set properties at the initialization stage).
033 * Checker guarantees that there will be exactly one check instance during the audit.
034 * This also means, that all files will be processed by the same check instance.
035 *
036 * @noinspection ClassIndependentOfModule
037 * @noinspectionreason ClassIndependentOfModule - we keep this annotation at top level by design
038 */
039@Retention(RetentionPolicy.RUNTIME)
040@Target(ElementType.TYPE)
041@Inherited
042public @interface StatelessCheck {
043
044    // this annotation does not have properties
045
046}