checkstyle.xml

<?xml version="1.0"?>
<!--
  Copyright (C) 2016 THL A29 Limited, a Tencent company.
  Copyright (C) 2014 Square, Inc.

  Licensed 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
    "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
    "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">

<module name="Checker">
  <!--module name="NewlineAtEndOfFile"/-->
  <module name="FileLength"/>
  <module name="FileTabCharacter"/>
  <module name="SuppressWarningsFilter"/>

  <!-- Trailing spaces -->
  <module name="RegexpSingleline">
    <property name="format" value="\s+$"/>
    <property name="message" value="Line has trailing spaces."/>
  </module>

  <!-- Space after 'for' and 'if' -->
  <module name="RegexpSingleline">
    <property name="format" value="^\s*(for|if)[^ ]\("/>
    <property name="message" value="Space needed before opening parenthesis."/>
  </module>

  <!-- For each spacing -->
  <module name="RegexpSingleline">
    <property name="format" value="^\s*for \(.*?([^ ]:|:[^ ])"/>
    <property name="message" value="Space needed around ':' character."/>
  </module>

  <module name="TreeWalker">
    <!-- Checks for Javadoc comments.                     -->
    <!-- See http://checkstyle.sf.net/config_javadoc.html -->
    <!--module name="JavadocMethod"/-->
    <!--module name="JavadocType"/-->
    <!--module name="JavadocVariable"/-->
    <!--module name="JavadocStyle"/-->


    <!-- Checks for Naming Conventions.                  -->
    <!-- See http://checkstyle.sf.net/config_naming.html -->
    <!--<module name="ConstantName"/>-->
    <module name="LocalFinalVariableName"/>
    <module name="LocalVariableName"/>
    <module name="MemberName"/>
    <module name="MethodName">
      <property name="format" value="^[a-z][a-zA-Z0-9_]*$"/>
    </module>
    <module name="PackageName"/>
    <module name="ParameterName"/>
    <module name="StaticVariableName"/>
    <module name="TypeName">
      <property name="format" value="^[A-Z][a-zA-Z0-9_]*$"/>
    </module>


    <!-- Checks for imports                              -->
    <!-- See http://checkstyle.sf.net/config_import.html -->
    <module name="AvoidStarImport"/>
    <module name="IllegalImport"/>
    <module name="RedundantImport"/>
    <module name="UnusedImports"/>


    <!-- Checks for Size Violations.                    -->
    <!-- See http://checkstyle.sf.net/config_sizes.html -->
    <!--module name="LineLength"-->
      <!--property name="max" value="100"/-->
    <!--/module-->
    <!--module name="MethodLength"/-->
    <!--<module name="ParameterNumber"/>-->

    <!-- Checks for whitespace                               -->
    <!-- See http://checkstyle.sf.net/config_whitespace.html -->
    <module name="GenericWhitespace"/>
    <module name="EmptyForIteratorPad"/>
    <module name="MethodParamPad"/>


    <module name="NoWhitespaceAfter"/>
    <module name="NoWhitespaceBefore"/>
    <module name="OperatorWrap"/>
    <module name="ParenPad"/>
    <module name="TypecastParenPad"/>
    <module name="WhitespaceAfter"/>
    <module name="WhitespaceAround"/>


    <!-- Modifier Checks                                    -->
    <!-- See http://checkstyle.sf.net/config_modifiers.html -->
    <!--module name="ModifierOrder"/-->
    <module name="RedundantModifier"/>


    <!-- Checks for blocks. You know, those {}'s         -->
    <!-- See http://checkstyle.sf.net/config_blocks.html -->
    <!--module name="AvoidNestedBlocks"/-->
    <!--module name="EmptyBlock"/-->
    <module name="LeftCurly"/>
    <!--allow single line-->
    <module name="NeedBraces">
      <property name="allowSingleLineStatement" value="true"/>
    </module>

    <module name="RightCurly"/>


    <!-- Checks for common coding problems               -->
    <!-- See http://checkstyle.sf.net/config_coding.html -->
    <!--module name="AvoidInlineConditionals"/-->
    <module name="CovariantEquals"/>
    <module name="EmptyStatement"/>
    <!--module name="EqualsAvoidNull"/-->
    <!--<module name="EqualsHashCode"/>-->
    <!--module name="HiddenField"/-->
    <module name="IllegalInstantiation"/>
    <!--<module name="InnerAssignment"/>-->
    <!--module name="MagicNumber"/-->
    <!--<module name="MissingSwitchDefault"/>-->
    <!--<module name="RedundantThrows"/>-->
    <module name="SimplifyBooleanExpression"/>
    <module name="SimplifyBooleanReturn"/>

    <!-- Checks for class design                         -->
    <!-- See http://checkstyle.sf.net/config_design.html -->
    <!--module name="DesignForExtension"/-->
    <!--module name="FinalClass"/-->
    <!--<module name="HideUtilityClassConstructor"/>-->
    <!--module name="InterfaceIsType"/-->
    <!--module name="VisibilityModifier"/-->


    <!-- Miscellaneous other checks.                   -->
    <!-- See http://checkstyle.sf.net/config_misc.html -->
    <module name="ArrayTypeStyle"/>
    <!--module name="FinalParameters"/-->
    <!--<module name="TodoComment"/>-->
    <module name="UpperEll"/>
    <module name="SuppressWarningsHolder"/>
  </module>
</module>