Issue 4248 - Add codestyle check

third_party/checkstyle/java/rules/mozilla_checks.xml

Index: third_party/checkstyle/java/rules/mozilla_checks.xml
diff --git a/third_party/checkstyle/java/rules/mozilla_checks.xml b/third_party/checkstyle/java/rules/mozilla_checks.xml
new file mode 100644
index 0000000000000000000000000000000000000000..a9219e846f1c6c2690ae9ddfa5533664cb748d53
--- /dev/null
+++ b/third_party/checkstyle/java/rules/mozilla_checks.xml
@@ -0,0 +1,172 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+    "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
+    "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
+
+<!--
+
+    https://github.com/mozilla-services/mozilla-style/blob/master/java/checkstyle.xml
+
+    This file contains a Checkstyle configuration that checks for compliance with
+    Mozilla's Java style conventions.
+
+    The file defines the modules and properties in alpabetical order. Each property
+    should be documented with what it does.
+
+-->
+
+<module name="Checker">
+  <module name="TreeWalker">
+    
+    <!-- Annotations. http://checkstyle.sourceforge.net/config_annotation.html -->
+    <module name="AnnotationUseStyle"/>
+    <module name="MissingDeprecated"/>
+    <module name="MissingOverride"/>
+    <module name="SuppressWarnings"/>
+
+    <!-- Block checks. See http://checkstyle.sourceforge.net/config_blocks.html -->
+    <module name="AvoidNestedBlocks"/>
+    <module name="EmptyBlock"/>
+    <module name="LeftCurly"/>
+    <module name="NeedBraces"/>
+    <module name="RightCurly"/>
+
+    <!-- Class Design. http://checkstyle.sourceforge.net/config_design.html -->
+    <module name="DesignForExtension"/>
+    <module name="FinalClass"/>
+    <module name="HideUtilityClassConstructor"/>
+    <module name="InterfaceIsType"/>
+    <module name="InnerTypeLast"/>
+    <module name="MutableException"/>
+    <module name="VisibilityModifier"/>
+
+    <!-- Common coding problems. See http://checkstyle.sf.net/config_coding.html -->
+    <module name="ArrayTrailingComma"/>
+    <module name="CovariantEquals"/>
+    <module name="DeclarationOrder"/>
+    <module name="DefaultComesLast"/>
+    <module name="EmptyStatement"/>
+    <module name="EqualsHashCode"/>
+    <module name="EqualsAvoidNull"/>
+    <module name="ExplicitInitialization"/>
+    <module name="HiddenField"/>
+    <module name="IllegalCatch"/>
+    <module name="IllegalInstantiation"/>
+    <module name="IllegalThrows"/>
+    <module name="IllegalToken"/>
+    <module name="IllegalType"/>
+    <module name="InnerAssignment"/>
+    <module name="MagicNumber"/>
+    <module name="MissingCtor"/>
+    <module name="MissingSwitchDefault"/>
+    <module name="ModifiedControlVariable"/>
+    <module name="MultipleStringLiterals"/>
+    <module name="MultipleVariableDeclarations"/>
+    <module name="NestedForDepth"/>
+    <module name="NoClone"/>
+    <module name="NoFinalizer"/>
+    <module name="OneStatementPerLine"/>
+    <module name="PackageDeclaration"/>
+    <module name="ParameterAssignment"/>
+    <module name="SimplifyBooleanExpression"/>
+    <module name="SimplifyBooleanReturn"/>
+    <module name="StringLiteralEquality"/>
+    <module name="UnnecessaryParentheses"/>
+
+    <!-- Duplicate code. http://checkstyle.sourceforge.net/config_duplicates.html -->
+
+    <!-- Header. See http://checkstyle.sourceforge.net/config_header.html -->
+    <!-- TODO detect MPL 2.0 in all files. -->
+
+    <!-- Imports. See http://checkstyle.sf.net/config_import.html -->
+    <module name="AvoidStarImport"/>
+    <module name="IllegalImport"/>
+    <module name="ImportOrder">
+      <!-- Android's import guidelines: http://source.android.com/source/code-style.html#order-import-statements -->
+      <property name="groups" value="android,ch,com,net,org,java,javax"/>
+      <property name="separated" value="true"/>
+    </module>
+    <module name="AvoidStaticImport"/>
+    <module name="RedundantImport"/>
+    <module name="UnusedImports"/>
+
+    <!-- Javadoc. See http://checkstyle.sourceforge.net/config_javadoc.html -->
+    <module name="JavadocMethod"/>
+    <module name="JavadocStyle"/>
+    <module name="JavadocType"/>
+    <module name="JavadocVariable"/>
+
+    <!-- Metrics. See http://checkstyle.sourceforge.net/config_metrics.html -->
+
+    <!-- Miscellaneous. See http://checkstyle.sourceforge.net/config_misc.html -->
+    <module name="ArrayTypeStyle"/>
+    <module name="Indentation"/>
+    <module name="OuterTypeFilename"/>
+    <module name="TodoComment">
+      <property name="format" value="FIX ?ME|TO-?DO|XXX"/>
+    </module>
+    <module name="UpperEll"/>
+
+    <!-- Modifiers. See http://checkstyle.sourceforge.net/config_modifier.html -->
+    <module name="ModifierOrder"/>
+    <module name="RedundantModifier"/>
+
+    <!-- Naming Conventions. See http://checkstyle.sourceforge.net/config_naming.html -->
+    <module name="ConstantName"/>
+    <module name="LocalFinalVariableName"/>
+    <module name="LocalVariableName"/>
+    <module name="MemberName">
+      <!-- We require member names to be prefixed with 'm'. -->
+      <property name="format" value="^m[A-Z][a-zA-Z0-9]*$" />
+    </module>
+    <module name="MethodName"/>
+    <module name="PackageName"/>
+    <module name="ParameterName"/>
+    <module name="StaticVariableName">
+      <!-- We require static member names to be prefixed with 's'. -->
+      <property name="format" value="^s[A-Z][a-zA-Z0-9]*$" />
+    </module>
+    <module name="TypeName"/>
+
+    <!-- Regular expressions. See http://checkstyle.sourceforge.net/config_regexp.html -->
+
+    <!-- Size violations. See http://checkstyle.sourceforge.net/config_sizes.html -->
+    <module name="AnonInnerLength"/>
+    <module name="LineLength">
+      <property name="max" value="100" />
+    </module>
+    <module name="MethodCount"/>
+    <module name="MethodLength"/>
+    <module name="OuterTypeNumber"/>
+    <module name="ParameterNumber"/>
+
+    <!-- Whitespace. See http://checkstyle.sourceforge.net/config_whitespace.html -->
+    <module name="EmptyForInitializerPad"/>
+    <module name="EmptyForIteratorPad"/>
+    <module name="GenericWhitespace"/>
+    <module name="MethodParamPad"/>
+    <module name="NoWhitespaceAfter"/>
+    <module name="NoWhitespaceBefore"/>
+    <module name="OperatorWrap"/>
+    <module name="ParenPad"/>
+    <module name="TypecastParenPad"/>
+    <module name="WhitespaceAfter"/>
+    <module name="WhitespaceAround"/>
+
+  </module>
+
+  <module name="FileLength"/>
+
+  <module name="FileTabCharacter">
+    <property name="eachLine" value="true"/>
+  </module>
+
+  <module name="NewlineAtEndOfFile"/>
+
+  <module name="RegexpSingleline">
+    <!-- Check for trailing whitespace. -->
+    <property name="format" value="\s+$"/>
+    <property name="message" value="Line has trailing spaces."/>
+  </module>
+
+</module>