Implement Coding Standard Adherence with Checkstyle

config/checkstyle/checkstyle-suppressions.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+
+<!DOCTYPE suppressions PUBLIC
+        "-//Checkstyle//DTD SuppressionFilter Configuration 1.0//EN" "https://checkstyle.org/dtds/suppressions_1_0.dtd">
+
+<suppressions>
+    <suppress checks="JavadocPackage" files="."/>
+    <suppress checks="HideUtilityClassConstructor" files="."/>
+    <suppress checks="JavadocType" files="."/>
+    <suppress checks="JavadocMethod" files="."/>
+    <suppress checks="JavadocVariable" files="."/>
+</suppressions>

config/checkstyle/checkstyle.xml

@@ -0,0 +1,199 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+        "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+        "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
+<!--
+
+  Checkstyle configuration that checks the sun coding conventions from:
+
+    - the Java Language Specification at
+      https://docs.oracle.com/javase/specs/jls/se11/html/index.html
+
+    - the Sun Code Conventions at https://www.oracle.com/java/technologies/javase/codeconventions-contents.html
+
+    - the Javadoc guidelines at
+      https://www.oracle.com/technical-resources/articles/java/javadoc-tool.html
+
+    - the JDK Api documentation https://docs.oracle.com/en/java/javase/11/
+
+    - some best practices
+
+  Checkstyle is very configurable. Be sure to read the documentation at
+  https://checkstyle.org (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.
+  To suppress certain violations please review suppression filters.
+
+  Finally, it is worth reading the documentation.
+
+-->
+
+<module name="Checker">
+    <!--
+        If you set the basedir property below, then all reported file
+        names will be relative to the specified directory. See
+        https://checkstyle.org/config.html#Checker
+
+        <property name="basedir" value="${basedir}"/>
+    -->
+    <property name="severity" value="error"/>
+
+    <property name="fileExtensions" value="java, properties, xml"/>
+
+    <!-- Excludes all 'module-info.java' files              -->
+    <!-- See https://checkstyle.org/filefilters/index.html -->
+    <module name="BeforeExecutionExclusionFileFilter">
+        <property name="fileNamePattern" value="module\-info\.java$"/>
+    </module>
+
+    <!-- https://checkstyle.org/filters/suppressionfilter.html -->
+    <module name="SuppressionFilter">
+        <property name="file" value="${org.checkstyle.sun.suppressionfilter.config}"
+                  default="checkstyle-suppressions.xml" />
+        <property name="optional" value="true"/>
+    </module>
+
+    <!-- Checks that a package-info.java file exists for each package.     -->
+    <!-- See https://checkstyle.org/checks/javadoc/javadocpackage.html#JavadocPackage -->
+    <module name="JavadocPackage"/>
+
+    <!-- Checks whether files end with a new line.                        -->
+    <!-- See https://checkstyle.org/checks/misc/newlineatendoffile.html -->
+    <module name="NewlineAtEndOfFile"/>
+
+    <!-- Checks that property files contain the same keys.         -->
+    <!-- See https://checkstyle.org/checks/misc/translation.html -->
+    <module name="Translation"/>
+
+    <!-- Checks for Size Violations.                    -->
+    <!-- See https://checkstyle.org/checks/sizes/index.html -->
+    <module name="FileLength"/>
+    <module name="LineLength">
+        <property name="fileExtensions" value="java"/>
+        <property name="max" value="120"/>
+    </module>
+
+    <!-- Checks for whitespace                               -->
+    <!-- See https://checkstyle.org/checks/whitespace/index.html -->
+    <module name="FileTabCharacter"/>
+
+    <!-- Miscellaneous other checks.                   -->
+    <!-- See https://checkstyle.org/checks/misc/index.html -->
+    <module name="RegexpSingleline">
+        <property name="format" value="\s+$"/>
+        <property name="minimum" value="0"/>
+        <property name="maximum" value="0"/>
+        <property name="message" value="Line has trailing spaces."/>
+    </module>
+
+    <!-- Checks for Headers                                -->
+    <!-- See https://checkstyle.org/checks/header/index.html   -->
+    <!-- <module name="Header"> -->
+    <!--   <property name="headerFile" value="${checkstyle.header.file}"/> -->
+    <!--   <property name="fileExtensions" value="java"/> -->
+    <!-- </module> -->
+
+    <module name="TreeWalker">
+
+        <!-- Checks for Javadoc comments.                     -->
+        <!-- See https://checkstyle.org/checks/javadoc/index.html -->
+        <module name="InvalidJavadocPosition"/>
+        <module name="JavadocMethod"/>
+        <module name="JavadocType"/>
+        <module name="JavadocVariable"/>
+        <module name="JavadocStyle"/>
+        <module name="MissingJavadocMethod"/>
+
+        <!-- Checks for Naming Conventions.                  -->
+        <!-- See https://checkstyle.org/checks/naming/index.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 https://checkstyle.org/checks/imports/index.html -->
+        <module name="AvoidStarImport"/>
+        <module name="IllegalImport"/> <!-- defaults to sun.* packages -->
+        <module name="RedundantImport"/>
+        <module name="UnusedImports">
+            <property name="processJavadoc" value="false"/>
+        </module>
+
+        <!-- Checks for Size Violations.                    -->
+        <!-- See https://checkstyle.org/checks/sizes/index.html -->
+        <module name="MethodLength"/>
+        <module name="ParameterNumber"/>
+
+        <!-- Checks for whitespace                               -->
+        <!-- See https://checkstyle.org/checks/whitespace/index.html -->
+        <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"/>
+
+        <!-- Modifier Checks                                    -->
+        <!-- See https://checkstyle.org/checks/modifier/index.html -->
+        <module name="ModifierOrder"/>
+        <module name="RedundantModifier"/>
+
+        <!-- Checks for blocks. You know, those {}'s         -->
+        <!-- See https://checkstyle.org/checks/blocks/index.html -->
+        <module name="AvoidNestedBlocks"/>
+        <module name="EmptyBlock"/>
+        <module name="LeftCurly"/>
+        <module name="NeedBraces"/>
+        <module name="RightCurly"/>
+
+        <!-- Checks for common coding problems               -->
+        <!-- See https://checkstyle.org/checks/coding/index.html -->
+        <module name="EmptyStatement"/>
+        <module name="EqualsHashCode"/>
+        <module name="HiddenField"/>
+        <module name="IllegalInstantiation"/>
+        <module name="InnerAssignment"/>
+        <module name="MagicNumber"/>
+        <module name="MissingSwitchDefault"/>
+        <module name="MultipleVariableDeclarations"/>
+        <module name="SimplifyBooleanExpression"/>
+        <module name="SimplifyBooleanReturn"/>
+
+        <!-- Checks for class design                         -->
+        <!-- See https://checkstyle.org/checks/design/index.html -->
+        <module name="DesignForExtension"/>
+        <module name="FinalClass"/>
+        <module name="HideUtilityClassConstructor"/>
+        <module name="InterfaceIsType"/>
+        <module name="VisibilityModifier"/>
+
+        <!-- Miscellaneous other checks.                   -->
+        <!-- See https://checkstyle.org/checks/misc/index.html -->
+        <module name="ArrayTypeStyle"/>
+        <module name="FinalParameters"/>
+        <module name="TodoComment"/>
+        <module name="UpperEll"/>
+
+        <!-- https://checkstyle.org/filters/suppressionxpathfilter.html -->
+        <module name="SuppressionXpathFilter">
+            <property name="file" value="${org.checkstyle.sun.suppressionxpathfilter.config}"
+                      default="checkstyle-xpath-suppressions.xml" />
+            <property name="optional" value="true"/>
+        </module>
+
+    </module>
+
+</module>

pom.xml

@@ -124,15 +124,38 @@
 	</profiles>
 
 	<build>
-		<pluginManagement>
-			<plugins>
-				<plugin>
-					<groupId>org.apache.maven.plugins</groupId>
-					<artifactId>maven-surefire-plugin</artifactId>
-					<version>3.0.0</version>
-				</plugin>
-			</plugins>
-		</pluginManagement>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-surefire-plugin</artifactId>
+				<version>3.0.0</version>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-checkstyle-plugin</artifactId>
+				<version>3.3.1</version>
+				<configuration>
+					<configLocation>config/checkstyle/checkstyle.xml</configLocation>
+					<suppressionsLocation>config/checkstyle/checkstyle-suppressions.xml</suppressionsLocation>
+					<suppressionsFileExpression>checkstyle.suppressions.file</suppressionsFileExpression>
+				</configuration>
+				<executions>
+					<execution>
+						<id>lint-check</id>
+						<phase>validate</phase>
+						<configuration>
+							<encoding>UTF-8</encoding>
+							<consoleOutput>true</consoleOutput>
+							<failsOnError>true</failsOnError>
+							<linkXRef>false</linkXRef>
+						</configuration>
+						<goals>
+							<goal>check</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
 	</build>
 
 	<properties>

src/main/java/co/novu/api/blueprints/BlueprintsHandler.java

@@ -8,24 +8,24 @@
 
 import java.io.IOException;
 
-public class BlueprintsHandler {
+public final class BlueprintsHandler {
 
     private final RestHandler restHandler;
 
     private final BlueprintsApi blueprintsApi;
 
-    public BlueprintsHandler(RestHandler restHandler) {
-        this.restHandler = restHandler;
-        this.blueprintsApi = restHandler.buildRetrofit().create(BlueprintsApi.class);
+    public BlueprintsHandler(final RestHandler handler) {
+        this.restHandler = handler;
+        this.blueprintsApi = handler.buildRetrofit().create(BlueprintsApi.class);
     }
 
     public BlueprintsByCategoryResponse getBlueprintsByCategory() throws IOException, NovuNetworkException {
         Response<BlueprintsByCategoryResponse> response = blueprintsApi.getBlueprintsByCategory().execute();
         return restHandler.extractResponse(response);
     }
 
-    public Blueprint getBlueprint(String templateId) throws IOException, NovuNetworkException {
+    public Blueprint getBlueprint(final String templateId) throws IOException, NovuNetworkException {
         Response<Blueprint> response = blueprintsApi.getBlueprint(templateId).execute();
         return restHandler.extractResponse(response);
     }
-}
+}

src/main/java/co/novu/api/blueprints/pojos/Blueprint.java

@@ -40,4 +40,4 @@ public class Blueprint {
     @SerializedName("__v")
     private Long version;
     private NotificationGroup notificationGroup;
-}
+}

src/main/java/co/novu/api/blueprints/pojos/Content.java

@@ -7,4 +7,4 @@ public class Content {
     private String type;
     private String content;
     private Styles styles;
-}
+}

src/main/java/co/novu/api/blueprints/pojos/Filters.java

@@ -10,4 +10,4 @@ public class Filters {
    private List<String> children;
    @SerializedName("_id")
    private String id;
-}
+}

src/main/java/co/novu/api/blueprints/pojos/General.java

@@ -8,4 +8,4 @@
 public class General {
    private String name;
    private List<Blueprint> blueprints;
-}
+}

src/main/java/co/novu/api/blueprints/pojos/Metadata.java

@@ -5,4 +5,4 @@
 @Data
 public class Metadata {
    private Timed timed;
-}
+}

src/main/java/co/novu/api/blueprints/pojos/Popular.java

@@ -8,4 +8,4 @@
 public class Popular {
    private String name;
    private List<Blueprint> blueprints;
-}
+}

src/main/java/co/novu/api/blueprints/pojos/Styles.java

@@ -5,4 +5,4 @@
 @Data
 public class Styles {
    private String textAlign;
-}
+}

src/main/java/co/novu/api/blueprints/pojos/Template.java

@@ -29,4 +29,4 @@ public class Template {
     private String updatedAt;
     @SerializedName("__v")
     private Long version;
-}
+}

src/main/java/co/novu/api/blueprints/pojos/Timed.java

@@ -8,4 +8,4 @@
 public class Timed {
    private List<String> weekDays;
    private List<String> monthDays;
-}
+}

src/main/java/co/novu/api/blueprints/pojos/Variables.java

@@ -8,4 +8,4 @@ public class Variables {
     private String type;
     private Boolean required;
     private String id;
-}
+}

src/main/java/co/novu/api/blueprints/responses/BlueprintsByCategoryResponse.java

@@ -5,4 +5,4 @@
 @Data
 public class BlueprintsByCategoryResponse {
     private BlueprintsResponseData data;
-}
+}

src/main/java/co/novu/api/blueprints/responses/BlueprintsResponseData.java

@@ -1,4 +1,5 @@
 package co.novu.api.blueprints.responses;
+
 import co.novu.api.blueprints.pojos.General;
 import co.novu.api.blueprints.pojos.Popular;
 import lombok.Data;
@@ -9,4 +10,4 @@
 public class BlueprintsResponseData {
    private List<General> general;
    private Popular popular;
-}
+}