[HUDI-386] Refactor hudi scala checkstyle rules (apache#1099)

pom.xml

@@ -163,7 +163,7 @@
           <failOnWarning>false</failOnWarning>
           <sourceDirectory>${project.basedir}/src/main/scala</sourceDirectory>
           <testSourceDirectory>${project.basedir}/src/test/scala</testSourceDirectory>
-          <configLocation>${main.basedir}/style/scalastyle-config.xml</configLocation>
+          <configLocation>${main.basedir}/style/scalastyle.xml</configLocation>
           <outputEncoding>UTF-8</outputEncoding>
         </configuration>
         <executions>

style/checkstyle.xml

@@ -24,7 +24,7 @@
     that can be found at https://google.github.io/styleguide/javaguide.html.
 
     Checkstyle is very configurable. Be sure to read the documentation at
-    http://checkstyle.sf.net (or in your downloaded distribution).
+    https://checkstyle.sourceforge.io/checks.html.
 
     To completely disable a check, just comment it out or delete it from the file.
 

style/scalastyle.xml

@@ -0,0 +1,134 @@
+<!--
+  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.
+-->
+
+<!--
+
+    Checkstyle is very configurable. Be sure to read the documentation at
+    http://www.scalastyle.org/rules-1.0.0.html.
+
+ -->
+
+<scalastyle>
+ <name>Scalastyle standard configuration</name>
+ <check level="error" class="org.scalastyle.file.FileTabChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.file.FileLengthChecker" enabled="true">
+  <parameters>
+   <parameter name="maxFileLength"><![CDATA[800]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.SpacesAfterPlusChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.file.WhitespaceEndOfLineChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.scalariform.SpacesBeforePlusChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.file.FileLineLengthChecker" enabled="false">
+  <parameters>
+   <parameter name="maxLineLength"><![CDATA[160]]></parameter>
+   <parameter name="tabSize"><![CDATA[4]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.ClassNamesChecker" enabled="true">
+  <parameters>
+   <parameter name="regex"><![CDATA[[A-Z][A-Za-z]*]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.ObjectNamesChecker" enabled="true">
+  <parameters>
+   <parameter name="regex"><![CDATA[[A-Z][A-Za-z]*]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.PackageObjectNamesChecker" enabled="true">
+  <parameters>
+   <parameter name="regex"><![CDATA[^[a-z][A-Za-z]*$]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.EqualsHashCodeChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.scalariform.IllegalImportsChecker" enabled="true">
+  <parameters>
+   <parameter name="illegalImports"><![CDATA[sun._,java.awt._]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.ParameterNumberChecker" enabled="true">
+  <parameters>
+   <parameter name="maxParameters"><![CDATA[8]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.MagicNumberChecker" enabled="false">
+  <parameters>
+   <parameter name="ignore"><![CDATA[-1,0,1,2,3]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.NoWhitespaceBeforeLeftBracketChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.scalariform.NoWhitespaceAfterLeftBracketChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.scalariform.ReturnChecker" enabled="false"/>
+ <check level="error" class="org.scalastyle.scalariform.NullChecker" enabled="false"/>
+ <check level="error" class="org.scalastyle.scalariform.NoCloneChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.scalariform.NoFinalizeChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.scalariform.CovariantEqualsChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.scalariform.StructuralTypeChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.file.RegexChecker" enabled="false">
+  <parameters>
+   <parameter name="regex"><![CDATA[println]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.NumberOfTypesChecker" enabled="true">
+  <parameters>
+   <parameter name="maxTypes"><![CDATA[30]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.CyclomaticComplexityChecker" enabled="false">
+  <parameters>
+   <parameter name="maximum"><![CDATA[10]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.UppercaseLChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.scalariform.SimplifyBooleanExpressionChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.scalariform.IfBraceChecker" enabled="false">
+  <parameters>
+   <parameter name="singleLineAllowed"><![CDATA[true]]></parameter>
+   <parameter name="doubleLineAllowed"><![CDATA[false]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.MethodLengthChecker" enabled="false">
+  <parameters>
+   <parameter name="maxLength"><![CDATA[50]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.MethodNamesChecker" enabled="true">
+  <parameters>
+   <parameter name="regex"><![CDATA[^[a-z][A-Za-z0-9]*$]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.NumberOfMethodsInTypeChecker" enabled="true">
+  <parameters>
+   <parameter name="maxMethods"><![CDATA[30]]></parameter>
+  </parameters>
+ </check>
+ <check level="error" class="org.scalastyle.scalariform.PublicMethodsHaveTypeChecker" enabled="false"/>
+ <check level="error" class="org.scalastyle.file.NewLineAtEofChecker" enabled="true"/>
+ <check level="error" class="org.scalastyle.file.NoNewLineAtEofChecker" enabled="false"/>
+ <check level="error" class="org.scalastyle.scalariform.BlockImportChecker" enabled="false"/>
+ <check level="error" class="org.scalastyle.scalariform.ImportOrderChecker" enabled="false">
+  <parameters>
+   <parameter name="groups">hudi,3rdParty,javax,java,scala</parameter>
+   <parameter name="group.hudi">org\.apache\.hudi\..*</parameter>
+   <parameter name="group.3rdParty">(?!org\.apache\.hudi\.).*</parameter>
+   <parameter name="group.javax">java?\..*</parameter>
+   <parameter name="group.java">javax?\..*</parameter>
+   <parameter name="group.scala">scala\..*</parameter>
+  </parameters>
+ </check>
+
+</scalastyle>