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[eclipse-ee4j#112]Introduce Checkstyle plugin; immediately got 468 er…
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…rors

Signed-off-by: Anton Pinsky <anton.pinsky@ionos.com>
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api-from-the-ion committed Nov 14, 2023
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28 changes: 28 additions & 0 deletions etc/config/checkstyle-suppressions.xml
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<?xml version="1.0"?>
<!--
Copyright (c) 2023 Oracle and/or its affiliates. All rights reserved.
This program and the accompanying materials are made available under the
terms of the Eclipse Public License v. 2.0, which is available at
http://www.eclipse.org/legal/epl-2.0.
This Source Code may also be made available under the following Secondary
Licenses when the conditions for such availability set forth in the
Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
version 2 with the GNU Classpath Exception, which is available at
https://www.gnu.org/software/classpath/license.html.
SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
-->

<!DOCTYPE suppressions PUBLIC
"-//Checkstyle//DTD SuppressionFilter Configuration 1.2//EN"
"https://checkstyle.org/dtds/suppressions_1_2.dtd">

<suppressions>
<!-- I was not able to properly set import ordering for static imports -->
<suppress checks="ImportOrder" message="Extra separation in import group before" />
</suppressions>

248 changes: 248 additions & 0 deletions etc/config/checkstyle.xml
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<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (c) 2023 Oracle and/or its affiliates. All rights reserved.
This program and the accompanying materials are made available under the
terms of the Eclipse Public License v. 2.0, which is available at
http://www.eclipse.org/legal/epl-2.0.
This Source Code may also be made available under the following Secondary
Licenses when the conditions for such availability set forth in the
Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
version 2 with the GNU Classpath Exception, which is available at
https://www.gnu.org/software/classpath/license.html.
SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
-->

<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.3//EN" "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
<!--
This file is based on maven-checkstyle-plugin config/sun_checks.xml file.
Checkstyle configuration that checks the coding conventions based on:
- the Java Language Specification at
http://java.sun.com/docs/books/jls/second_edition/html/index.html
- the Sun Code Conventions at http://java.sun.com/docs/codeconv/
- the Javadoc guidelines at
http://java.sun.com/j2se/javadoc/writingdoccomments/index.html
- the JDK Api documentation http://java.sun.com/j2se/docs/api/index.html
- some custom relaxations of the rules above & best practices
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.
Finally, it is worth reading the documentation.
-->

<module name="Checker">

<!-- exclude module-info.java check - checkstyle can't process it -->
<module name="BeforeExecutionExclusionFileFilter">
<property name="fileNamePattern" value="module\-info\.java$"/>
</module>

<!--
If you set the basedir property below, then all reported file
names will be relative to the specified directory. See
http://checkstyle.sourceforge.net/5.x/config.html#Checker
<property name="basedir" value="${basedir}"/>
-->
<property name="charset" value="UTF-8"/>

<!-- Checks that each Java package has a Javadoc file used for commenting. -->
<!-- See http://checkstyle.sf.net/config_javadoc.html#JavadocPackage -->
<!-- <module name="JavadocPackage" />-->

<!-- Checks to see if a file contains a tab character. -->
<module name="FileTabCharacter">
<property name="eachLine" value="true"/>
</module>

<!--
Making sure we do not have @author tags in javadocs
There is a list of developers in pom.xml that is sufficient for our needs.
See https://github.com/checkstyle/checkstyle/issues/5339
-->
<module name="RegexpSingleline">
<!-- The '.' in id is needed, otherwise ArrayIndexOutOfBounds happens -->
<property name="id" value="Javadoc.javadocNoAuthor"/>
<property name="format" value="^\s*\*\s*@author"/>
<property name="minimum" value="0"/>
<property name="maximum" value="0"/>
<property name="message" value="Javadoc has illegal ''author'' tag."/>
<property name="fileExtensions" value="java"/>
</module>

<!-- Checks that property files contain the same keys. -->
<!-- See http://checkstyle.sf.net/config_misc.html#Translation -->
<module name="Translation"/>

<module name="FileLength"/>

<module name="SuppressWarningsFilter"/>
<module name="TreeWalker">
<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="SuppressWarningsHolder"/>

<!-- Checks for Javadoc comments. -->
<!-- See http://checkstyle.sf.net/config_javadoc.html -->
<module name="JavadocMethod">
<property name="accessModifiers" value="protected"/>
<property name="allowMissingReturnTag" value="true"/>
<property name="allowMissingParamTags" value="true"/>
</module>
<module name="JavadocType">
<property name="scope" value="protected"/>
</module>
<module name="JavadocVariable">
<property name="scope" value="protected"/>
</module>
<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"/>
<module name="PackageName"/>
<module name="ParameterName"/>
<module name="StaticVariableName"/>
<module name="TypeName"/>

<!-- Checks for imports -->
<!-- See http://checkstyle.sf.net/config_import.html -->
<module name="AvoidStarImport"/>
<module name="UnusedImports"/>
<module name="IllegalImport"/> <!-- defaults to sun.* packages -->
<module name="RedundantImport"/>
<module name="ImportOrder">
<property name="groups" value="java, javax, jakarta, org.eclipse.parsson"/>
<property name="ordered" value="true"/>
<property name="separated" value="true"/>
<property name="option" value="bottom"/>
</module>

<!-- Checks for blocks. You know, those {}'s -->
<!-- See http://checkstyle.sf.net/config_blocks.html -->
<module name="AvoidNestedBlocks"/>
<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="LeftCurly"/>
<module name="RightCurly"/>
<module name="RightCurly">
<property name="option" value="alone"/>
<property name="tokens"
value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, STATIC_INIT, INSTANCE_INIT"/>
</module>

<!-- Indentation -->
<property name="tabWidth" value="4"/>

<!-- Wrapping Lines -->
<module name="NoLineWrap"/>
<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>

<!-- Several variable declaration on one line: int i, p; -->
<module name="MultipleVariableDeclarations"/>

<module name="OuterTypeFilename"/>
<module name="OneTopLevelClass"/>

<!-- Checks for whitespace -->
<!-- See http://checkstyle.sf.net/config_whitespace.html -->
<module name="OperatorWrap"/>
<module name="WhitespaceAfter"/>
<module name="MethodParamPad"/>
<module name="NoWhitespaceAfter"/>
<module name="NoWhitespaceBefore"/>
<module name="ParenPad"/>
<module name="TypecastParenPad"/>
<module name="WhitespaceAfter"/>
<module name="WhitespaceAround">
<!-- Removed static initializer issues: RCURLY, SLIST -->
<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, LAND, LCURLY, LE, LITERAL_ASSERT, 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, SL, SL_ASSIGN, SR, SR_ASSIGN, STAR, STAR_ASSIGN,
TYPE_EXTENSION_AND"/>
<property name="allowEmptyConstructors" value="true"/>
<property name="allowEmptyMethods" value="true"/>
<property name="allowEmptyTypes" value="true"/>
<property name="allowEmptyLoops" value="true"/>
<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="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>

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

<!-- Checks for common coding problems -->
<!-- See http://checkstyle.sf.net/config_coding.html -->
<module name="EmptyStatement"/>
<module name="EqualsHashCode"/>
<module name="IllegalInstantiation"/>
<module name="InnerAssignment"/>
<module name="MissingSwitchDefault"/>

<module name="SimplifyBooleanExpression"/>
<module name="SimplifyBooleanReturn"/>

<!-- Checks for class design -->
<!-- See http://checkstyle.sf.net/config_design.html -->
<module name="HideUtilityClassConstructor"/>
<module name="InterfaceIsType"/>
<module name="VisibilityModifier">
<property name="packageAllowed" value="true"/>
</module>
<module name="ThrowsCount">
<property name="max" value="3"/>
</module>

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

<module name="OneStatementPerLine"/>
<!-- <module name="FallThrough"/>-->

<module name="NoFinalizer"/>
</module>
</module>
38 changes: 38 additions & 0 deletions pom.xml
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</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-checkstyle-plugin</artifactId>
<executions>
<execution>
<id>run-checkstyle</id>
<goals>
<goal>check</goal>
</goals>
<phase>validate</phase>
</execution>
</executions>
</plugin>
</plugins>

<pluginManagement>
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<artifactId>maven-gpg-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-checkstyle-plugin</artifactId>
<version>3.3.1</version>
<configuration>
<configLocation>etc/config/checkstyle.xml</configLocation>
<suppressionsLocation>etc/config/checkstyle-suppressions.xml</suppressionsLocation>
<consoleOutput>true</consoleOutput>
<failsOnError>true</failsOnError>
<linkXRef>false</linkXRef>
</configuration>
<dependencies>
<dependency>
<groupId>com.puppycrawl.tools</groupId>
<artifactId>checkstyle</artifactId>
<version>10.12.4</version>
<exclusions>
<exclusion>
<groupId>com.sun</groupId>
<artifactId>tools</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
</plugin>
</plugins>
</pluginManagement>
</build>
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