feat: java practice for naming conventions

src/practices/Java/JavaNamingConventionsPractice.ts

@@ -0,0 +1,36 @@
+import { IPractice } from '../IPractice';
+import { PracticeEvaluationResult, PracticeImpact, ProgrammingLanguage } from '../../model';
+import { DxPractice } from '../DxPracticeDecorator';
+import { PracticeContext } from '../../contexts/practice/PracticeContext';
+
+@DxPractice({
+  id: 'Java.NamingConventions',
+  name: 'Use Java Naming Conventions',
+  impact: PracticeImpact.high,
+  suggestion: 'Java class names should begin capitalized as UpperCamelCase or PascalCase in a regular naming convention.',
+  reportOnlyOnce: true,
+  url: 'https://www.oracle.com/technetwork/java/codeconventions-135099.html',
+})
+export class JavaNamingConventionsPractice implements IPractice {
+  async isApplicable(ctx: PracticeContext): Promise<boolean> {
+    return ctx.projectComponent.language === ProgrammingLanguage.Java;
+  }
+
+  async evaluate(ctx: PracticeContext): Promise<PracticeEvaluationResult> {
+    if (!ctx.fileInspector) {
+      return PracticeEvaluationResult.unknown;
+    }
+
+    const regexDotJava = new RegExp('.java', 'i');
+    const javaFiles = await ctx.fileInspector.scanFor(regexDotJava, '/', { shallow: false });
+    javaFiles.forEach((file) => {
+      if (file.baseName !== file.baseName.replace(/^\w/, (firstChar) => firstChar.toUpperCase())) {
+        return PracticeEvaluationResult.notPracticing;
+      } else {
+        return PracticeEvaluationResult.practicing;
+      }
+    });
+
+    return PracticeEvaluationResult.notPracticing;
+  }
+}

src/practices/index.ts

@@ -31,6 +31,7 @@ import { ThinPullRequestsPractice } from './LanguageIndependent/ThinPullRequests
 import { SecurityVulnerabilitiesPractice } from './JavaScript/SecurityVulnerabilitiesPractice';
 import { FirstTestPractice, SecondTestPractice, InvalidTestPractice } from '../scanner';
 import { JavaPackageManagementUsedPractice } from './Java/JavaPackageManagementUsed';
+import { JavaNamingConventionsPractice } from './Java/JavaNamingConventionsPractice';
 
 // register practices here
 export const practices = [
@@ -66,4 +67,5 @@ export const practices = [
   ThinPullRequestsPractice,
   SecurityVulnerabilitiesPractice,
   JavaPackageManagementUsedPractice,
+  JavaNamingConventionsPractice,
 ];