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checkstyle.xml
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checkstyle.xml
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<!--
~ 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
"-//Puppy Crawl//DTD Check Configuration 1.3//EN"
"https://checkstyle.org/dtds/configuration_1_3.dtd">
<!--
Checkstyle configuration based on the Google coding conventions from:
- Google Java Style
https://google.github.io/styleguide/javaguide.html
with Spark-specific changes from:
http://spark.apache.org/contributing.html#code-style-guide
Checkstyle is very configurable. Be sure to read the documentation at
http://checkstyle.sf.net (or in your downloaded distribution).
Most Checks are configurable, be sure to consult the documentation.
To completely disable a check, just comment it out or delete it from the file.
Authors: Max Vetrenko, Ruslan Diachenko, Roman Ivanov.
-->
<module name = "Checker">
<property name="charset" value="UTF-8"/>
<property name="severity" value="error"/>
<property name="fileExtensions" value="java, properties, xml"/>
<module name="SuppressionFilter">
<property name="file" value="dev/checkstyle-suppressions.xml"/>
</module>
<!-- Checks for whitespace -->
<!-- See http://checkstyle.sf.net/config_whitespace.html -->
<module name="FileTabCharacter">
<property name="eachLine" value="true"/>
</module>
<module name="RegexpSingleline">
<!-- \s matches whitespace character, $ matches end of line. -->
<property name="format" value="\s+$"/>
<property name="message" value="No trailing whitespace allowed."/>
</module>
<module name="LineLength">
<property name="max" value="100"/>
<property name="ignorePattern" value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
</module>
<module name="NewlineAtEndOfFile"/>
<module name="TreeWalker">
<!--
If you wish to turn off checking for a section of code, you can put a comment in the source
before and after the section, with the following syntax:
// checkstyle.off: XXX (such as checkstyle.off: NoFinalizer)
... // stuff that breaks the styles
// checkstyle.on: XXX (such as checkstyle.on: NoFinalizer)
-->
<module name="SuppressionCommentFilter">
<property name="offCommentFormat" value="checkstyle\.off\: ([\w\|]+)"/>
<property name="onCommentFormat" value="checkstyle\.on\: ([\w\|]+)"/>
<property name="checkFormat" value="$1"/>
</module>
<module name="OuterTypeFilename"/>
<module name="IllegalTokenText">
<property name="tokens" value="STRING_LITERAL, CHAR_LITERAL"/>
<property name="format" value="\\u00(08|09|0(a|A)|0(c|C)|0(d|D)|22|27|5(C|c))|\\(0(10|11|12|14|15|42|47)|134)"/>
<property name="message" value="Avoid using corresponding octal or Unicode escape."/>
</module>
<module name="AvoidEscapedUnicodeCharacters">
<property name="allowEscapesForControlCharacters" value="true"/>
<property name="allowByTailComment" value="true"/>
<property name="allowNonPrintableEscapes" value="true"/>
</module>
<module name="NoLineWrap"/>
<module name="EmptyBlock">
<property name="option" value="TEXT"/>
<property name="tokens" value="LITERAL_TRY, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE, LITERAL_SWITCH"/>
</module>
<module name="NeedBraces">
<property name="allowSingleLineStatement" value="true"/>
</module>
<module name="OneStatementPerLine"/>
<module name="ArrayTypeStyle"/>
<module name="FallThrough"/>
<module name="UpperEll"/>
<module name="ModifierOrder"/>
<module name="SeparatorWrap">
<property name="tokens" value="DOT"/>
<property name="option" value="nl"/>
</module>
<module name="SeparatorWrap">
<property name="tokens" value="COMMA"/>
<property name="option" value="EOL"/>
</module>
<module name="PackageName">
<property name="format" value="^[a-z]+(\.[a-z][a-z0-9]*)*$"/>
<message key="name.invalidPattern"
value="Package name ''{0}'' must match pattern ''{1}''."/>
</module>
<module name="ClassTypeParameterName">
<property name="format" value="([A-Z][a-zA-Z0-9]*$)"/>
<message key="name.invalidPattern"
value="Class type name ''{0}'' must match pattern ''{1}''."/>
</module>
<module name="MethodTypeParameterName">
<property name="format" value="([A-Z][a-zA-Z0-9]*)"/>
<message key="name.invalidPattern"
value="Method type name ''{0}'' must match pattern ''{1}''."/>
</module>
<module name="GenericWhitespace">
<message key="ws.followed"
value="GenericWhitespace ''{0}'' is followed by whitespace."/>
<message key="ws.preceded"
value="GenericWhitespace ''{0}'' is preceded with whitespace."/>
<message key="ws.illegalFollow"
value="GenericWhitespace ''{0}'' should followed by whitespace."/>
<message key="ws.notPreceded"
value="GenericWhitespace ''{0}'' is not preceded with whitespace."/>
</module>
<!-- TODO: 11/09/15 disabled - indentation is currently inconsistent -->
<!--
<module name="Indentation">
<property name="basicOffset" value="4"/>
<property name="braceAdjustment" value="0"/>
<property name="caseIndent" value="4"/>
<property name="throwsIndent" value="4"/>
<property name="lineWrappingIndentation" value="4"/>
<property name="arrayInitIndent" value="4"/>
</module>
-->
<!-- TODO: 11/09/15 disabled - order is currently wrong in many places -->
<!--
<module name="ImportOrder">
<property name="separated" value="true"/>
<property name="ordered" value="true"/>
<property name="groups" value="/^javax?\./,scala,*,org.apache.spark"/>
</module>
-->
<module name="MethodParamPad"/>
<module name="AnnotationLocation">
<property name="tokens" value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF"/>
</module>
<module name="AnnotationLocation">
<property name="tokens" value="VARIABLE_DEF"/>
<property name="allowSamelineMultipleAnnotations" value="true"/>
</module>
<module name="MethodName">
<property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9_]*$"/>
<message key="name.invalidPattern"
value="Method name ''{0}'' must match pattern ''{1}''."/>
</module>
<module name="EmptyCatchBlock">
<property name="exceptionVariableName" value="expected"/>
</module>
<module name="CommentsIndentation"/>
<module name="UnusedImports"/>
<module name="RedundantImport"/>
<module name="RedundantModifier"/>
<module name="RegexpSinglelineJava">
<property name="format" value="throw new \w+Error\("/>
<property name="message" value="Avoid throwing error in application code."/>
</module>
<module name="RegexpSinglelineJava">
<property name="format" value="Objects\.toStringHelper"/>
<property name="message" value="Avoid using Object.toStringHelper. Use ToStringBuilder instead." />
</module>
</module>
</module>