checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.2//EN" "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">

<module name="Checker">
	<!--
        Formatting (whitespace/brace/line-wrap) checks have been disabled
        because the Eclipse formatter profile (metricshub-eclipse-formatter.xml) covers these rules.
    -->

	<!-- Keep checking that files end with a newline -->
	<module name="NewlineAtEndOfFile" />

	<!-- Translation checks (not formatting-related) -->
	<module name="Translation" />

	<!-- File-length checks (size, not formatting) -->
	<!-- module name="FileLength" /-->

	<!-- Disable strictly formatting-related regex (trailing spaces) -->
	<!--
    <module name="RegexpSingleline">
        <property name="format" value="\s+$"/>
        <property name="minimum" value="0"/>
        <property name="maximum" value="0"/>
        <property name="message" value="Line has trailing spaces."/>
    </module>
    -->

	<module name="TreeWalker">

		<!-- Suppression of specific rules -->
		<!-- CHECKSTYLE.OFF: <ruleName> -->
		<!-- CHECKSTYLE.ON: <ruleName> -->
		<module name="SuppressionCommentFilter">
			<property name="offCommentFormat" value="CHECKSTYLE.OFF\: ([\w\|]+)" />
			<property name="onCommentFormat" value="CHECKSTYLE.ON\: ([\w\|]+)" />
			<property name="checkFormat" value="$1" />
		</module>

		<!-- Naming conventions (unaffected by formatter) -->
		<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" />

		<!-- Import-related checks (not formatting) -->
		<module name="AvoidStarImport" />
		<module name="IllegalImport" />
		<module name="RedundantImport" />
		<module name="UnusedImports" />

		<!-- Size checks (not formatting) -->
		<module name="MethodLength">
			<property name="max" value="2000" />
		</module>
		<module name="ParameterNumber">
			<property name="tokens" value="METHOD_DEF" />
		</module>

		<!-- Disable all whitespace/indent/wrapping checks because the Eclipse formatter enforces
		spacing -->
		<!--
        <module name="EmptyForIteratorPad"/>
        <module name="GenericWhitespace"/>
        <module name="MethodParamPad"/>
        <module name="NoWhitespaceAfter"/>
        <module name="NoWhitespaceBefore"/>
        <module name="OperatorWrap"/>
        <module name="TypecastParenPad"/>
        <module name="WhitespaceAfter">
            <property name="tokens" value="COMMA, SEMI"/>
        </module>
        <module name="WhitespaceAround">
            <property name="tokens" value="ASSIGN, BAND_ASSIGN, BOR_ASSIGN, BSR_ASSIGN, BXOR_ASSIGN,
                                          COLON, DIV_ASSIGN, EQUAL, GE, GT, LE, LITERAL_RETURN, LT,
                                          MINUS_ASSIGN, MOD_ASSIGN, NOT_EQUAL, PLUS_ASSIGN, QUESTION,
                                          SL_ASSIGN, SR_ASSIGN, STAR_ASSIGN"/>
        </module>
        -->

		<!-- Modifier checks (unaffected by formatting) -->
		<module name="ModifierOrder" />
		<module name="RedundantModifier" />

		<!-- Block-level checks (only disabling Opening‐brace style) -->
		<module name="AvoidNestedBlocks">
			<property name="allowInSwitchCase " value="true" />
		</module>
		<module name="NeedBraces" />

		<!-- Common coding problem checks (unaffected by formatting) -->
		<module name="EmptyStatement" />
		<module name="EqualsHashCode" />
		<module name="HiddenField">
			<property name="ignoreConstructorParameter" value="true" />
			<property name="ignoreSetter" value="true" />
		</module>
		<module name="IllegalInstantiation" />
		<module name="InnerAssignment" />
		<module name="MissingSwitchDefault" />
		<module name="SimplifyBooleanExpression" />
		<module name="SimplifyBooleanReturn" />

		<!-- Design checks (unrelated to formatting) -->
		<module name="FinalClass" />
		<module name="HideUtilityClassConstructor" />
		<module name="InterfaceIsType" />
		<module name="VisibilityModifier" />

		<!-- Miscellaneous (keep non-formatting Todo checks) -->
		<module name="ArrayTypeStyle" />
		<module name="TodoComment">
			<property name="format" value="FIXME" />
		</module>
		<module name="TodoComment">
			<property name="format" value="TODO" />
			<property name="severity" value="warning" />
		</module>
		<module name="TodoComment">
			<property name="format" value="XXX" />
			<property name="severity" value="warning" />
		</module>
		<module name="UpperEll" />

	</module>
</module>