checkstyle.xml

<!--
  ~  Copyright 2017 Alexey Andreev.
  ~
  ~  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="TreeWalker">
    <module name="AnnotationUseStyle"/>
    <module name="MissingOverride">
      <property name="javaFiveCompatibility" value="true"/>
    </module>
    <module name="EmptyBlock">
      <property name="option" value="text"/>
      <property name="tokens" value="LITERAL_CATCH"/>
    </module>
    <module name="EmptyBlock">
      <property name="tokens" value="LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY, LITERAL_IF,
          LITERAL_FOR, LITERAL_TRY, LITERAL_WHILE, STATIC_INIT"/>
      <property name="option" value="text"/>
    </module>
    <module name="LeftCurly"/>
    <module name="NeedBraces"/>
    <module name="RightCurly"/>
    <module name="InterfaceIsType"/>
    <module name="HideUtilityClassConstructor"/>
    <module name="EmptyStatement"/>
    <module name="EqualsHashCode"/>
    <module name="InnerAssignment"/>
    <module name="SimplifyBooleanExpression"/>
    <module name="SimplifyBooleanReturn"/>
    <module name="StringLiteralEquality"/>
    <module name="IllegalThrows">
      <property name="illegalClassNames" value="java.lang.Error, java.lang.RuntimeException"/>
    </module>
    <module name="ExplicitInitialization"/>
    <module name="DefaultComesLast"/>
    <module name="FallThrough"/>
    <module name="MultipleVariableDeclarations"/>
    <module name="UnnecessaryParentheses"/>
    <module name="RedundantImport"/>
    <module name="UnusedImports">
      <property name="processJavadoc" value="true"/>
    </module>
    <module name="ImportOrder">
      <property name="option" value="top"/>
    </module>
    <module name="UpperEll"/>
    <module name="ArrayTypeStyle"/>
    <module name="RedundantModifier">
      <property name="tokens" value="METHOD_DEF,VARIABLE_DEF,ANNOTATION_FIELD_DEF,INTERFACE_DEF,CLASS_DEF,ENUM_DEF"/>
    </module>
    <module name="ClassTypeParameterName"/>
    <module name="LocalFinalVariableName"/>
    <module name="LocalVariableName"/>
    <module name="MemberName"/>
    <module name="MethodName">
      <property name="format" value="^(([A-Z][A-Z0-9]+)|([a-z][a-z0-9]*))([A-Z][a-z0-9]*)*"/>
    </module>
    <module name="MethodTypeParameterName"/>
    <module name="PackageName"/>
    <module name="ParameterName"/>
    <module name="StaticVariableName"/>
    <module name="TypeName"/>
    <module name="LineLength">
      <property name="max" value="120"/>
    </module>
    <module name="GenericWhitespace"/>
    <module name="EmptyForInitializerPad"/>
    <module name="EmptyForIteratorPad"/>
    <module name="MethodParamPad"/>
    <module name="NoWhitespaceAfter">
       <property name="tokens" value="BNOT,DEC,DOT,INC,LNOT,UNARY_MINUS,UNARY_PLUS"/>
    </module>
    <module name="NoWhitespaceBefore">
      <property name="allowLineBreaks" value="true"/>
      <property name="tokens" value="SEMI,POST_DEC,POST_INC"/>
    </module>
    <module name="OperatorWrap"/>
    <module name="ParenPad"/>
    <module name="TypecastParenPad"/>
    <module name="WhitespaceAfter">
      <property name="tokens" value="COMMA,SEMI,TYPECAST"/>
    </module>
    <module name="WhitespaceAround"/>
  </module>
  <module name="RegexpHeader">
    <property name="headerFile" value="license-regexp.txt"/>
    <property name="fileExtensions" value="java"/>
  </module>
  <module name="FileTabCharacter">
    <property name="fileExtensions" value="java"/>
  </module>
</module>