config/maven_checks.xml
This is a predefined ruleset for Maven coding conventions that can be used in Maven Checkstyle Plugin:
<?xml version="1.0"?> <!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> <!DOCTYPE module PUBLIC "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN" "https://checkstyle.org/dtds/configuration_1_3.dtd"> <!-- Checkstyle configuration that checks the Maven coding conventions from: https://maven.apache.org/developers/conventions/code.html --> <module name="Checker"> <!-- BeforeExecutionFileFilters is required for sources that are based on java9 --> <module name="BeforeExecutionExclusionFileFilter"> <property name="fileNamePattern" value="module\-info\.java$" /> </module> <!-- Checks whether files end with a new line. --> <!-- See https://checkstyle.org/config_misc.html#NewlineAtEndOfFile --> <!-- module name="NewlineAtEndOfFile"/ --> <module name="FileLength"/> <!-- Checks for Headers --> <!-- See https://checkstyle.org/config_header.html --> <module name="RegexpHeader"> <property name="fileExtensions" value="java"/> <property name="headerFile" value="${checkstyle.header.file}"/> </module> <module name="FileTabCharacter"> <property name="eachLine" value="true"/> </module> <!-- Line with trailing spaces (disabled as it's too noisy) --> <!--<module name="RegexpSingleline"> <property name="format" value="\s+$"/> <property name="message" value="Line has trailing spaces."/> </module>--> <module name="LineLength"> <property name="max" value="120" /> <property name="ignorePattern" value="@version|@see|@todo|TODO"/> </module> <!-- Support CHECKSTYLE_OFF: regexp and CHECKSTYLE_ON: regexp comments to disable/enable some checks --> <!-- see https://checkstyle.org/config_filters.html#SuppressWithPlainTextCommentFilter --> <module name="SuppressWithPlainTextCommentFilter"> <property name="offCommentFormat" value="CHECKSTYLE_OFF\: (.+)"/> <property name="onCommentFormat" value="CHECKSTYLE_ON\: (.+)"/> <property name="checkFormat" value="$1"/> </module> <module name="TreeWalker"> <property name="tabWidth" value="4"/> <!-- required for SuppressWarningsFilter (and other Suppress* rules not used here) --> <!-- see https://checkstyle.org/config_annotation.html#SuppressWarningsHolder --> <module name="SuppressWarningsHolder"/> <module name="LeftCurly"> <property name="option" value="nl"/> </module> <module name="RightCurly"> <property name="option" value="alone"/> </module> <module name="MemberName" /> <!-- Checks for Javadoc comments. --> <!-- See https://checkstyle.org/config_javadoc.html --> <!-- To configure the check to use legacy package.html file when package-info.java file is absent: <module name="JavadocPackage"> <property name="allowLegacy" value="true"/> </module> --> <module name="JavadocMethod"> <property name="accessModifiers" value="public, protected"/> <property name="severity" value="warning"/> </module> <module name="JavadocType"> <property name="scope" value="protected"/> <property name="allowUnknownTags" value="true" /> </module> <module name="JavadocVariable"> <property name="severity" value="info"/> <property name="scope" value="protected"/> </module> <!-- Checks for Naming Conventions. --> <!-- See https://checkstyle.org/config_naming.html --> <module name="ConstantName"/> <module name="LocalFinalVariableName"/> <module name="LocalVariableName"/> <module name="MethodName"/> <module name="PackageName"/> <module name="ParameterName"/> <module name="StaticVariableName"/> <module name="TypeName"/> <!-- Checks for imports --> <!-- See https://checkstyle.org/config_imports.html --> <module name="AvoidStarImport"/> <module name="IllegalImport"/> <module name="RedundantImport"/> <module name="UnusedImports"/> <!-- Checks for Size Violations. --> <!-- See https://checkstyle.org/config_sizes.html --> <module name="MethodLength"/> <module name="ParameterNumber"/> <!-- Checks for whitespace --> <!-- See https://checkstyle.org/config_whitespace.html --> <module name="EmptyForIteratorPad"> <property name="option" value="space"/> </module> <!-- module name="NoWhitespaceAfter"/ --> <!-- module name="NoWhitespaceBefore"/ --> <module name="OperatorWrap"/> <module name="ParenPad"> <property name="option" value="space" /> </module> <module name="WhitespaceAfter"/> <module name="WhitespaceAround"/> <!-- module name="MethodParamPad"/ --> <module name="GenericWhitespace"/> <!-- Modifier Checks --> <!-- See https://checkstyle.org/config_modifier.html --> <module name="ModifierOrder"/> <module name="RedundantModifier"/> <!-- Checks for blocks. You know, those {}'s --> <!-- See https://checkstyle.org/config_blocks.html --> <module name="AvoidNestedBlocks"/> <module name="EmptyBlock"> <property name="option" value="text"/> </module> <module name="NeedBraces"/> <!-- Checks for common coding problems --> <!-- See https://checkstyle.org/config_coding.html vv--> <!-- module name="AvoidInlineConditionals"/ --> <module name="EmptyStatement"/> <module name="EqualsHashCode"/> <module name="HiddenField"> <property name="severity" value="warning"/> <property name="ignoreSetter" value="true"/> <property name="ignoreConstructorParameter" value="true"/> </module> <module name="IllegalInstantiation"/> <module name="InnerAssignment"/> <module name="MagicNumber"> <!-- some numbers are really not that magic --> <property name="ignoreNumbers" value="-4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 31, 32, 37, 64, 100, 128, 256, 512, 1000, 1024"/> </module> <module name="MissingSwitchDefault"/> <module name="SimplifyBooleanExpression"/> <module name="SimplifyBooleanReturn"/> <!-- Checks for class design --> <!-- See https://checkstyle.org/config_design.html --> <!-- module name="DesignForExtension"/ --> <!-- module name="FinalClass"/ --> <!-- module name="HideUtilityClassConstructor"/ --> <module name="InterfaceIsType"/> <module name="VisibilityModifier"> <property name="protectedAllowed" value="true"/> <property name="packageAllowed" value="true"/> </module> <!-- Miscellaneous other checks. --> <!-- See https://checkstyle.org/config_misc.html --> <!-- module name="ArrayTypeStyle"/ --> <!-- module name="FinalParameters"/ --> <!-- Let todo plugin handle this. <module name="TodoComment"/> --> <module name="UpperEll"/> </module> <!-- Support @SuppressWarnings (added in Checkstyle 5.7) --> <!-- see https://checkstyle.org/config.html#SuppressWarningsFilter --> <module name="SuppressWarningsFilter"/> <!-- Checks properties file for a duplicated properties. --> <!-- See https://checkstyle.org/config_misc.html#UniqueProperties --> <module name="UniqueProperties"/> </module>