From 45c983adf0918170bb4eb1107c0ee1d0312577fd Mon Sep 17 00:00:00 2001
From: "Vitalii Tymchyshyn (repo management)" <vitaliit@google.com>
Date: Sat, 4 Mar 2023 03:10:17 +0000
Subject: [PATCH] Update Github Actions and checkstyle

---
 .github/workflows/build.yml |   9 +-
 checkstyle.xml              | 636 +++++++++++++++++++++---------------
 2 files changed, 380 insertions(+), 265 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 55b3ee060..e88553fde 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -33,6 +33,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           ref: ${{ github.event.workflow_run.head_sha }}
+          submodules: recursive
       - name: Cache
         uses: actions/cache@v3
         with:
@@ -43,7 +44,7 @@ jobs:
       - name: Build with Maven
         run: mvn clean test -fae -T 2 -B -V -DcloudBuild -Dmaven.wagon.http.retryHandler.count=3 -Dmaven.wagon.httpconnectionManager.ttlSeconds=25
       - name: Archive build artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v2.2.2
         if: always()
         with:
           name: Build debug files
@@ -60,3 +61,9 @@ jobs:
           detailed_summary: true
           commit: ${{ github.event.workflow_run.head_sha }}
           check_name: Test Report
+      - name: Checkstyle report
+        uses: tivv/checkstyle-github-action@fcf8ffb7c6a5c110bbc5dafb84aca54caf359b80
+        if: always()
+        with:
+          path: '**/checkstyle-result.xml'
+          commit: ${{ github.event.workflow_run.head_sha }}
diff --git a/checkstyle.xml b/checkstyle.xml
index 07209ea29..8b1612285 100644
--- a/checkstyle.xml
+++ b/checkstyle.xml
@@ -1,6 +1,10 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+        "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+        "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
 <!--
-  Copyright © 2014-2015 Cask Data, Inc.
+  Copyright © 2014-2023 Cask Data, 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
@@ -13,22 +17,59 @@
   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"
-    "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+  Based on:
+    https://github.com/checkstyle/checkstyle/blob/005fba53352456515cfdcdf5dcd3dea351661f2b/src/main/resources/google_checks.xml
+    under https://github.com/checkstyle/checkstyle/blob/005fba53352456515cfdcdf5dcd3dea351661f2b/LICENSE.apache20
+    Checkstyle configuration that checks the Google coding conventions from Google Java Style
+    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.org (or in your downloaded distribution).
+
+    To completely disable a check, just comment it out or delete it from the file.
+    To suppress certain violations please review suppression filters.
 
-<!-- This is a checkstyle configuration file. For descriptions of
-what the following rules do, please see the checkstyle configuration
-page at http://checkstyle.sourceforge.net/config.html -->
+    Authors: Max Vetrenko, Ruslan Diachenko, Roman Ivanov.
+ -->
 
-<module name="Checker">
+<module name = "Checker">
+  <module name="SuppressWarningsFilter"/>
 
+  <property name="charset" value="UTF-8"/>
+
+  <property name="severity" value="warning"/>
+
+  <property name="fileExtensions" value="java, scala, properties, xml"/>
+  <!-- Excludes all 'module-info.java' files              -->
+  <!-- See https://checkstyle.org/config_filefilters.html -->
+  <module name="BeforeExecutionExclusionFileFilter">
+    <property name="fileNamePattern" value="module\-info\.java$"/>
+  </module>
+
+  <!-- Checks for whitespace                               -->
+  <!-- See http://checkstyle.org/config_whitespace.html -->
   <module name="FileTabCharacter">
     <property name="severity" value="error"/>
-    <!-- Checks that there are no tab characters in the file.
+    <property name="eachLine" value="true"/>
+  </module>
+
+  <module name="LineLength">
+    <!-- Checks if a line is too long. -->
+    <property name="max" value="120" default="120"/>
+    <property name="severity" value="error"/>
+    <property name="fileExtensions" value="java, scala"/>
+
+    <!--
+      The default ignore pattern exempts the following elements:
+        - import statements
+        - long URLs inside comments
+        - JavaDoc links or code fragments without spaces
     -->
+
+    <property name="ignorePattern"
+              value="${com.puppycrawl.tools.checkstyle.checks.sizes.LineLength.ignorePattern}"
+              default="^(package .*;\s*)|(import .*;\s*)|( *\* *https?://.*)|( *[*].*[{]@(link|code) [^ ]*)$"/>
   </module>
 
   <!--
@@ -42,7 +83,6 @@ page at http://checkstyle.sourceforge.net/config.html -->
     <property name="severity" value="warning"/>
   </module>
 
-
   <module name="NewlineAtEndOfFile">
     <property name="lineSeparator" value="lf"/>
   </module>
@@ -55,7 +95,7 @@ page at http://checkstyle.sourceforge.net/config.html -->
   </module>
 
   <module name="RegexpSingleline">
-    <!-- Checks that TODOs are named with some basic formatting. Checks for the following pattern  TODO: ( 
+    <!-- Checks that TODOs are named with some basic formatting. Checks for the following pattern  TODO: (
     -->
     <property name="format" value="((//.*)|(\*.*))TODO[^: (]" />
     <property name="message" value='All TODOs should be named.  e.g. "TODO: (ENG-123) - Refactor when v2 is released."' />
@@ -67,11 +107,20 @@ page at http://checkstyle.sourceforge.net/config.html -->
     <property name="severity" value="error"/>
   </module>
 
-  <!-- All Java AST specific tests live under TreeWalker module. -->
   <module name="TreeWalker">
-
-    <!-- required for SupressionCommentFilter and SuppressWithNearbyCommentFilter -->
-    <module name="FileContentsHolder"/>
+    <module name="OuterTypeFilename"/>
+    <module name="IllegalTokenText">
+      <property name="tokens" value="STRING_LITERAL, CHAR_LITERAL"/>
+      <property name="format"
+                value="\\u00(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="Consider using special escape sequence instead of octal value or Unicode escaped value."/>
+    </module>
+    <module name="AvoidEscapedUnicodeCharacters">
+      <property name="allowEscapesForControlCharacters" value="true"/>
+      <property name="allowByTailComment" value="true"/>
+      <property name="allowNonPrintableEscapes" value="true"/>
+    </module>
 
     <!--
 
@@ -89,20 +138,13 @@ page at http://checkstyle.sourceforge.net/config.html -->
       <property name="severity" value="error"/>
     </module>
 
-    <module name="ImportOrder">
-      <!-- Checks for out of order import statements. -->
-      <property name="severity" value="error"/>
-      <property name="ordered" value="true"/>
-      <property name="groups" value="/([^j]|.[^a]|..[^v]|...[^a])/,/^javax?\./"/>
-      <!-- This ensures that static imports go to the end. -->
-      <property name="option" value="bottom"/>
-      <property name="tokens" value="STATIC_IMPORT, IMPORT"/>
-    </module>
 
     <module name="IllegalImport">
       <property name="illegalPkgs" value="junit.framework"/>
     </module>
 
+    <module name="UnusedImports"/>
+
     <!--
 
     METHOD LENGTH CHECKS
@@ -114,195 +156,80 @@ page at http://checkstyle.sourceforge.net/config.html -->
       <property name="max" value="300"/>
       <property name="countEmpty" value="false"/>
       <property name="severity" value="warning"/>
-   </module>
-   
-    <!--
-
-    JAVADOC CHECKS
-
-    -->
-
-    <!-- Checks for Javadoc comments.                     -->
-    <!-- See http://checkstyle.sf.net/config_javadoc.html -->
-    <module name="JavadocMethod">
-      <property name="scope" value="protected"/>
-      <property name="severity" value="error"/>
-      <property name="allowMissingJavadoc" value="true"/>
-      <property name="allowMissingParamTags" value="true"/>
-      <property name="allowMissingReturnTag" value="true"/>
-      <property name="allowMissingThrowsTags" value="true"/>
-      <property name="allowThrowsTagsForSubclasses" value="true"/>
-      <property name="allowUndeclaredRTE" value="true"/>
-    </module>
-
-    <module name="JavadocType">
-      <property name="scope" value="protected"/>
-      <property name="severity" value="error"/>
-    </module>
-
-    <module name="JavadocStyle">
-      <property name="severity" value="error"/>
-    </module>
-
-    <!--
-
-    NAMING CHECKS
-
-    -->
-
-    <!-- Item 38 - Adhere to generally accepted naming conventions -->
-
-    <module name="PackageName">
-      <!-- Validates identifiers for package names against the
-        supplied expression. -->
-      <!-- Here the default checkstyle rule restricts package name parts to
-        seven characters, this is not in line with common practice at Google.
-      -->
-      <property name="format" value="^[a-z]+(\.[a-z][a-z0-9]{1,})*$"/>
-      <property name="severity" value="error"/>
-    </module>
-
-    <module name="TypeNameCheck">
-      <!-- Validates static, final fields against the
-      expression "^[A-Z][a-zA-Z0-9]*$". -->
-      <metadata name="altname" value="TypeName"/>
-      <property name="severity" value="error"/>
-    </module>
-
-    <module name="ConstantNameCheck">
-      <!-- Validates non-private, static, final fields against the supplied
-      public/package final fields "^[A-Z][A-Z0-9]*(_[A-Z0-9]+)*$". -->
-      <metadata name="altname" value="ConstantName"/>
-      <property name="applyToPublic" value="true"/>
-      <property name="applyToProtected" value="true"/>
-      <property name="applyToPackage" value="true"/>
-      <property name="applyToPrivate" value="false"/>
-      <property name="format" value="^([A-Z][A-Z0-9]*(_[A-Z0-9]+)*|FLAG_.*)$"/>
-      <message key="name.invalidPattern"
-               value="Variable ''{0}'' should be in ALL_CAPS (if it is a constant) or be private (otherwise)."/>
-      <property name="severity" value="error"/>
-    </module>
-
-    <module name="StaticVariableNameCheck">
-      <!-- Validates static, non-final fields against the supplied
-      expression "^[a-z][a-zA-Z0-9]*_?$". -->
-      <metadata name="altname" value="StaticVariableName"/>
-      <property name="applyToPublic" value="true"/>
-      <property name="applyToProtected" value="true"/>
-      <property name="applyToPackage" value="true"/>
-      <property name="applyToPrivate" value="true"/>
-      <property name="format" value="^[a-z][a-zA-Z0-9]*_?$"/>
-      <property name="severity" value="error"/>
-    </module>
-
-    <module name="MemberNameCheck">
-      <!-- Validates non-static members against the supplied expression. -->
-      <metadata name="altname" value="MemberName"/>
-      <property name="applyToPublic" value="true"/>
-      <property name="applyToProtected" value="true"/>
-      <property name="applyToPackage" value="true"/>
-      <property name="applyToPrivate" value="true"/>
-      <property name="format" value="^[a-z][a-zA-Z0-9]*$"/>
-      <property name="severity" value="error"/>
-    </module>
-
-    <module name="MethodNameCheck">
-      <!-- Validates identifiers for method names. -->
-      <metadata name="altname" value="MethodName"/>
-      <property name="format" value="^[a-z][a-zA-Z0-9]*(_[a-zA-Z0-9]+)*$"/>
-      <property name="severity" value="error"/>
     </module>
 
-    <module name="ParameterName">
-      <!-- Validates identifiers for method parameters against the
-        expression "^[a-z][a-zA-Z0-9]*$". -->
-      <property name="severity" value="error"/>
+    <module name="OneTopLevelClass"/>
+    <module name="NoLineWrap">
+      <property name="tokens" value="PACKAGE_DEF, IMPORT, STATIC_IMPORT"/>
     </module>
-
-    <module name="LocalFinalVariableName">
-      <!-- Validates identifiers for local final variables against the
-        expression "^[a-z][a-zA-Z0-9]*$". -->
-      <property name="severity" value="error"/>
+    <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="LocalVariableName">
-      <!-- Validates identifiers for local variables against the
-        expression "^[a-z][a-zA-Z0-9]*$". -->
-      <property name="severity" value="error"/>
-    </module>
-
-
-    <!--
-
-    LENGTH and CODING CHECKS
-
-    -->
-
-    <module name="LineLength">
-      <!-- Checks if a line is too long. -->
-      <property name="max" value="120" default="120"/>
-      <property name="severity" value="error"/>
-
-      <!--
-        The default ignore pattern exempts the following elements:
-          - import statements
-          - long URLs inside comments
-      -->
-
-      <property name="ignorePattern"
-          value="${com.puppycrawl.tools.checkstyle.checks.sizes.LineLength.ignorePattern}"
-          default="^(package .*;\s*)|(import .*;\s*)|( *\* *https?://.*)$"/>
+    <module name="NeedBraces">
+      <property name="tokens"
+                value="LITERAL_DO, LITERAL_ELSE, LITERAL_FOR, LITERAL_IF, LITERAL_WHILE"/>
     </module>
-
     <module name="LeftCurly">
-      <!-- Checks for placement of the left curly brace ('{'). -->
-      <property name="severity" value="error"/>
+      <property name="tokens"
+                value="ANNOTATION_DEF, CLASS_DEF, CTOR_DEF, ENUM_CONSTANT_DEF, ENUM_DEF,
+                    INTERFACE_DEF, LAMBDA, LITERAL_CASE, LITERAL_CATCH, LITERAL_DEFAULT,
+                    LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY, LITERAL_FOR, LITERAL_IF,
+                    LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_TRY, LITERAL_WHILE, METHOD_DEF,
+                    OBJBLOCK, STATIC_INIT, RECORD_DEF, COMPACT_CTOR_DEF"/>
     </module>
-
     <module name="RightCurly">
-      <!-- Checks right curlies on CATCH, ELSE, and TRY blocks are on
-      the same line. e.g., the following example is fine:
-      <pre>
-        if {
-          ...
-        } else
-      </pre>
-      -->
-      <!-- This next example is not fine:
-      <pre>
-        if {
-          ...
-        }
-        else
-      </pre>
-      -->
-      <property name="option" value="same"/>
-      <property name="severity" value="error"/>
+      <property name="id" value="RightCurlySame"/>
+      <property name="tokens"
+                value="LITERAL_TRY, LITERAL_CATCH, LITERAL_FINALLY, LITERAL_IF, LITERAL_ELSE,
+                    LITERAL_DO"/>
     </module>
-
-    <!-- Checks for braces around if and else blocks -->
-    <module name="NeedBraces">
-      <property name="severity" value="error"/>
-      <property name="tokens" value="LITERAL_IF, LITERAL_ELSE, LITERAL_FOR, LITERAL_WHILE, LITERAL_DO"/>
+    <module name="RightCurly">
+      <property name="id" value="RightCurlyAlone"/>
+      <property name="option" value="alone"/>
+      <property name="tokens"
+                value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, STATIC_INIT,
+                    INSTANCE_INIT, ANNOTATION_DEF, ENUM_DEF, INTERFACE_DEF, RECORD_DEF,
+                    COMPACT_CTOR_DEF"/>
     </module>
-
-    <module name="UpperEll">
-      <!-- Checks that long constants are defined with an upper ell.-->
-      <property name="severity" value="error"/>
+    <module name="SuppressionXpathSingleFilter">
+      <!-- suppresion is required till https://github.com/checkstyle/checkstyle/issues/7541 -->
+      <property name="id" value="RightCurlyAlone"/>
+      <property name="query" value="//RCURLY[parent::SLIST[count(./*)=1]
+                                     or preceding-sibling::*[last()][self::LCURLY]]"/>
     </module>
-
-    <module name="FallThrough">
-      <!-- Warn about falling through to the next case statement.  Similar to
-      javac -Xlint:fallthrough, but the check is suppressed if a single-line comment
-      on the last non-blank line preceding the fallen-into case contains 'fall through' (or
-      some other variants which we don't publicized to promote consistency).
-      -->
-      <property name="reliefPattern"
-       value="fall through|Fall through|fallthru|Fallthru|falls through|Falls through|fallthrough|Fallthrough|No break|NO break|no break|continue on"/>
-      <property name="severity" value="error"/>
+    <module name="WhitespaceAfter">
+      <property name="tokens"
+                value="COMMA, SEMI, TYPECAST, LITERAL_IF, LITERAL_ELSE,
+                    LITERAL_WHILE, LITERAL_DO, LITERAL_FOR, DO_WHILE"/>
     </module>
-
-
+    <module name="WhitespaceAround">
+      <property name="allowEmptyConstructors" value="true"/>
+      <property name="allowEmptyLambdas" value="true"/>
+      <property name="allowEmptyMethods" value="true"/>
+      <property name="allowEmptyTypes" value="true"/>
+      <property name="allowEmptyLoops" value="true"/>
+      <property name="ignoreEnhancedForColon" value="false"/>
+      <property name="tokens"
+                value="ASSIGN, BAND, BAND_ASSIGN, BOR, BOR_ASSIGN, BSR, BSR_ASSIGN, BXOR,
+                    BXOR_ASSIGN, COLON, DIV, DIV_ASSIGN, DO_WHILE, EQUAL, GE, GT, LAMBDA, LAND,
+                    LCURLY, LE, LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY,
+                    LITERAL_FOR, LITERAL_IF, LITERAL_RETURN, LITERAL_SWITCH, LITERAL_SYNCHRONIZED,
+                    LITERAL_TRY, LITERAL_WHILE, LOR, LT, MINUS, MINUS_ASSIGN, MOD, MOD_ASSIGN,
+                    NOT_EQUAL, PLUS, PLUS_ASSIGN, QUESTION, RCURLY, SL, SLIST, SL_ASSIGN, SR,
+                    SR_ASSIGN, STAR, STAR_ASSIGN, LITERAL_ASSERT, TYPE_EXTENSION_AND"/>
+      <message key="ws.notFollowed"
+               value="WhitespaceAround: ''{0}'' is not followed by whitespace. Empty blocks may only be represented as '{}' when not part of a multi-block statement (4.1.3)"/>
+      <message key="ws.notPreceded"
+               value="WhitespaceAround: ''{0}'' is not preceded with whitespace."/>
+    </module>
+    <module name="OneStatementPerLine"/>
+    <module name="MultipleVariableDeclarations"/>
+    <module name="ArrayTypeStyle"/>
+    <module name="MissingSwitchDefault"/>
+    <module name="FallThrough"/>
+    <module name="UpperEll"/>
     <!--
 
     MODIFIERS CHECKS
@@ -324,83 +251,264 @@ page at http://checkstyle.sourceforge.net/config.html -->
            - inner interface declarations that are declared as static.
         -->
     </module>
-
-
-    <!--
-
-    WHITESPACE CHECKS
-
-    -->
-    <module name="GenericWhitespace"/>
-
-    <module name="WhitespaceAround">
-      <!-- Checks that various tokens are surrounded by whitespace.
-           This includes most binary operators and keywords followed
-           by regular or curly braces.
-      -->
-      <property name="tokens" value="ASSIGN, BAND, BAND_ASSIGN, BOR,
-        BOR_ASSIGN, BSR, BSR_ASSIGN, BXOR, BXOR_ASSIGN, COLON, DIV, DIV_ASSIGN,
-        EQUAL, GE, GT, LAND, LCURLY, LE, LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE,
-        LITERAL_FINALLY, LITERAL_FOR, LITERAL_IF, LITERAL_RETURN,
-        LITERAL_SYNCHRONIZED, LITERAL_TRY, LITERAL_WHILE, LOR, LT, MINUS,
-        MINUS_ASSIGN, MOD, MOD_ASSIGN, NOT_EQUAL, PLUS, PLUS_ASSIGN, QUESTION,
-        SL, SLIST, SL_ASSIGN, SR_ASSIGN, STAR, STAR_ASSIGN"/>
-      <property name="allowEmptyConstructors" value="true"/>
-      <property name="allowEmptyMethods" value="true"/>
-      <property name="severity" value="error"/>
+    <module name="EmptyLineSeparator">
+      <property name="tokens"
+                value="PACKAGE_DEF, IMPORT, STATIC_IMPORT, CLASS_DEF, INTERFACE_DEF, ENUM_DEF,
+                    STATIC_INIT, INSTANCE_INIT, METHOD_DEF, CTOR_DEF, VARIABLE_DEF, RECORD_DEF,
+                    COMPACT_CTOR_DEF"/>
+      <property name="allowNoEmptyLineBetweenFields" value="true"/>
     </module>
-
-    <module name="WhitespaceAfter">
-      <!-- Checks that commas, semicolons and typecasts are followed by
-           whitespace.
-      -->
-      <property name="tokens" value="COMMA, SEMI, TYPECAST"/>
-      <property name="severity" value="error"/>
+    <module name="SeparatorWrap">
+      <property name="id" value="SeparatorWrapDot"/>
+      <property name="tokens" value="DOT"/>
+      <property name="option" value="nl"/>
     </module>
-
-    <module name="NoWhitespaceAfter">
-      <!-- Checks that there is no whitespace after various unary operators.
-           Linebreaks are allowed.
-      -->
-      <property name="tokens" value="BNOT, DEC, DOT, INC, LNOT, UNARY_MINUS,
-        UNARY_PLUS"/>
-      <property name="allowLineBreaks" value="true"/>
+    <module name="SeparatorWrap">
+      <property name="id" value="SeparatorWrapComma"/>
+      <property name="tokens" value="COMMA"/>
+      <property name="option" value="EOL"/>
+    </module>
+    <module name="SeparatorWrap">
+      <!-- ELLIPSIS is EOL until https://github.com/google/styleguide/issues/259 -->
+      <property name="id" value="SeparatorWrapEllipsis"/>
+      <property name="tokens" value="ELLIPSIS"/>
+      <property name="option" value="EOL"/>
+    </module>
+    <module name="SeparatorWrap">
+      <!-- ARRAY_DECLARATOR is EOL until https://github.com/google/styleguide/issues/258 -->
+      <property name="id" value="SeparatorWrapArrayDeclarator"/>
+      <property name="tokens" value="ARRAY_DECLARATOR"/>
+      <property name="option" value="EOL"/>
+    </module>
+    <module name="SeparatorWrap">
+      <property name="id" value="SeparatorWrapMethodRef"/>
+      <property name="tokens" value="METHOD_REF"/>
+      <property name="option" value="nl"/>
+    </module>
+    <module name="PackageName">
+      <property name="format" value="^[a-z]+(\.[a-z][a-z0-9]*)*$"/>
+      <property name="severity" value="error" />
+      <message key="name.invalidPattern"
+               value="Package name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="TypeName">
+      <property name="tokens" value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF,
+                    ANNOTATION_DEF, RECORD_DEF"/>
       <property name="severity" value="error"/>
+      <message key="name.invalidPattern"
+               value="Type name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="MemberName">
+      <!-- Allow cConf/hConf -->
+      <property name="format" value="^[a-z][a-zA-Z0-9]+$"/>
+      <message key="name.invalidPattern"
+          value="Member name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="ParameterName">
+      <!-- Allow cConf / hConf -->
+      <property name="format" value="^[a-z][a-zA-Z0-9]*$"/>
+      <message key="name.invalidPattern"
+               value="Parameter name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="LambdaParameterName">
+      <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+      <message key="name.invalidPattern"
+               value="Lambda parameter name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="CatchParameterName">
+      <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+      <message key="name.invalidPattern"
+               value="Catch parameter name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="LocalVariableName">
+      <!-- Diff from Google style - we allow cConf/hConf -->
+      <property name="format" value="^[a-z]([a-zA-Z0-9]+)?$"/>
+      <message key="name.invalidPattern"
+               value="Local variable name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="PatternVariableName">
+      <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+      <message key="name.invalidPattern"
+               value="Pattern variable name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="ClassTypeParameterName">
+      <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+      <message key="name.invalidPattern"
+               value="Class type name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="RecordComponentName">
+      <property name="format" value="^[a-z]([a-z0-9][a-zA-Z0-9]*)?$"/>
+      <message key="name.invalidPattern"
+               value="Record component name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="RecordTypeParameterName">
+      <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+      <message key="name.invalidPattern"
+               value="Record type name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="MethodTypeParameterName">
+      <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+      <message key="name.invalidPattern"
+               value="Method type name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="InterfaceTypeParameterName">
+      <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
+      <message key="name.invalidPattern"
+               value="Interface type name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="NoFinalizer"/>
+    <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>
+    <module name="Indentation">
+      <!-- TODO: Temporary mark this as ignore to reduce number of violations
+           until code is reformatted -->
+      <property name="severity" value="ignore"/>
+      <property name="basicOffset" value="2"/>
+      <property name="braceAdjustment" value="2"/>
+      <property name="caseIndent" value="2"/>
+      <property name="throwsIndent" value="4"/>
+      <property name="lineWrappingIndentation" value="4"/>
+      <property name="arrayInitIndent" value="2"/>
+    </module>
+    <module name="AbbreviationAsWordInName">
+      <property name="ignoreFinal" value="false"/>
+      <property name="allowedAbbreviationLength" value="0"/>
+      <property name="tokens"
+                value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, ANNOTATION_DEF, ANNOTATION_FIELD_DEF,
+                    PARAMETER_DEF, VARIABLE_DEF, METHOD_DEF, PATTERN_VARIABLE_DEF, RECORD_DEF,
+                    RECORD_COMPONENT_DEF"/>
+    </module>
+    <module name="NoWhitespaceBeforeCaseDefaultColon"/>
+    <module name="OverloadMethodsDeclarationOrder"/>
+    <module name="VariableDeclarationUsageDistance"/>
+    <module name="CustomImportOrder">
+      <property name="sortImportsInGroupAlphabetically" value="true"/>
+      <property name="separateLineBetweenGroups" value="true"/>
+      <property name="customImportOrderRules" value="STATIC###THIRD_PARTY_PACKAGE"/>
+      <property name="tokens" value="IMPORT, STATIC_IMPORT, PACKAGE_DEF"/>
+    </module>
+    <module name="MethodParamPad">
+      <property name="tokens"
+                value="CTOR_DEF, LITERAL_NEW, METHOD_CALL, METHOD_DEF,
+                    SUPER_CTOR_CALL, ENUM_CONSTANT_DEF, RECORD_DEF"/>
     </module>
-
     <module name="NoWhitespaceBefore">
-      <!-- Checks that there is no whitespace before various unary operators.
-           Linebreaks are allowed.
-      -->
-      <property name="tokens" value="SEMI, DOT, POST_DEC, POST_INC"/>
+      <property name="tokens"
+                value="COMMA, SEMI, POST_INC, POST_DEC, DOT,
+                    LABELED_STAT, METHOD_REF"/>
       <property name="allowLineBreaks" value="true"/>
-      <property name="severity" value="error"/>
     </module>
-
     <module name="ParenPad">
-      <!-- Checks that there is no whitespace before close parens or after
-           open parens.
-      -->
-      <property name="severity" value="error"/>
+      <property name="tokens"
+                value="ANNOTATION, ANNOTATION_FIELD_DEF, CTOR_CALL, CTOR_DEF, DOT, ENUM_CONSTANT_DEF,
+                    EXPR, LITERAL_CATCH, LITERAL_DO, LITERAL_FOR, LITERAL_IF, LITERAL_NEW,
+                    LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_WHILE, METHOD_CALL,
+                    METHOD_DEF, QUESTION, RESOURCE_SPECIFICATION, SUPER_CTOR_CALL, LAMBDA,
+                    RECORD_DEF"/>
+    </module>
+    <module name="OperatorWrap">
+      <property name="option" value="NL"/>
+      <property name="tokens"
+                value="BAND, BOR, BSR, BXOR, DIV, EQUAL, GE, GT, LAND, LE, LITERAL_INSTANCEOF, LOR,
+                    LT, MINUS, MOD, NOT_EQUAL, PLUS, QUESTION, SL, SR, STAR, METHOD_REF,
+                    TYPE_EXTENSION_AND "/>
+    </module>
+    <module name="AnnotationLocation">
+      <property name="id" value="AnnotationLocationMostCases"/>
+      <property name="tokens"
+                value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF,
+                      RECORD_DEF, COMPACT_CTOR_DEF"/>
+    </module>
+    <module name="AnnotationLocation">
+      <property name="id" value="AnnotationLocationVariables"/>
+      <property name="tokens" value="VARIABLE_DEF"/>
+      <property name="allowSamelineMultipleAnnotations" value="true"/>
+    </module>
+    <module name="NonEmptyAtclauseDescription"/>
+    <module name="InvalidJavadocPosition"/>
+    <module name="JavadocTagContinuationIndentation"/>
+    <module name="SummaryJavadoc">
+      <property name="forbiddenSummaryFragments"
+                value="^@return the *|^This method returns |^A [{]@code [a-zA-Z0-9]+[}]( is a )"/>
+    </module>
+    <module name="JavadocParagraph"/>
+    <module name="RequireEmptyLineBeforeBlockTagGroup"/>
+    <module name="AtclauseOrder">
+      <property name="tagOrder" value="@param, @return, @throws, @deprecated"/>
+      <property name="target"
+                value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF, VARIABLE_DEF"/>
+    </module>
+    <module name="JavadocMethod">
+      <property name="accessModifiers" value="public"/>
+      <property name="allowMissingParamTags" value="true"/>
+      <property name="allowMissingReturnTag" value="true"/>
+      <property name="allowedAnnotations" value="Override, Test"/>
+      <property name="tokens" value="METHOD_DEF, CTOR_DEF, ANNOTATION_FIELD_DEF, COMPACT_CTOR_DEF"/>
+    </module>
+    <module name="MissingJavadocMethod">
+      <property name="scope" value="public"/>
+      <property name="minLineCount" value="2"/>
+      <property name="allowedAnnotations" value="Override, Test"/>
+      <property name="tokens" value="METHOD_DEF, CTOR_DEF, ANNOTATION_FIELD_DEF,
+                                   COMPACT_CTOR_DEF"/>
+    </module>
+    <module name="MissingJavadocType">
+      <property name="scope" value="protected"/>
+      <property name="tokens"
+                value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF,
+                      RECORD_DEF, ANNOTATION_DEF"/>
+      <property name="excludeScope" value="nothing"/>
+    </module>
+    <module name="MethodName">
+      <property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9_]*$"/>
+      <message key="name.invalidPattern"
+               value="Method name ''{0}'' must match pattern ''{1}''."/>
+    </module>
+    <module name="SingleLineJavadoc"/>
+    <!-- Requires overriding equals and hashCode at the same time -->
+    <module name="EqualsHashCode"/>
+    <module name="EmptyCatchBlock">
+      <property name="exceptionVariableName" value="expected"/>
+    </module>
+    <module name="ExplicitInitialization"/>
+    <module name="CommentsIndentation">
+      <property name="tokens" value="SINGLE_LINE_COMMENT, BLOCK_COMMENT_BEGIN"/>
+    </module>
+    <!-- https://checkstyle.org/config_filters.html#SuppressionXpathFilter -->
+    <module name="SuppressionXpathFilter">
+      <property name="file" value="${org.checkstyle.google.suppressionxpathfilter.config}"
+                default="checkstyle-xpath-suppressions.xml" />
+      <property name="optional" value="true"/>
+    </module>
+    <module name="SuppressWarningsHolder" />
+    <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="SuppressWithNearbyCommentFilter">
+      <property name="commentFormat" value="CHECKSTYLE.SUPPRESS\: ([\w\|]+)"/>
+      <!-- $1 refers to the first match group in the regex defined in commentFormat -->
+      <property name="checkFormat" value="$1"/>
+      <!-- The check is suppressed in the next line of code after the comment -->
+      <property name="influenceFormat" value="1"/>
     </module>
-
   </module>
 
   <!--
     Optional suppression filter. It is optional because when running with Maven, it should be the
      checkstyle plugin who provides it. It is only used when this file is used in IntelliJ.
     -->
-
   <module name="SuppressionFilter">
     <property name="file" value="suppressions.xml"/>
     <property name="optional" value="true"/>
   </module>
-
-  <module name="SuppressionCommentFilter">
-    <property name="offCommentFormat" value="CHECKSTYLE OFF: (.+)" />
-    <property name="onCommentFormat" value="CHECKSTYLE ON" />
-    <property name="checkFormat" value="Javadoc.*"/>
-    <property name="messageFormat" value="$1"/>
-  </module>
-
-</module>
+</module>
\ No newline at end of file