Enable checkstyle's Indentation module

airsonic-main/src/main/java/org/airsonic/player/TomcatApplication.java

@@ -11,36 +11,36 @@ public class TomcatApplication {
 
     public static void configure(TomcatEmbeddedServletContainerFactory tomcatFactory) {
 
-            tomcatFactory.addContextCustomizers((TomcatContextCustomizer) context -> {
-
-                StandardJarScanFilter standardJarScanFilter = new StandardJarScanFilter();
-                standardJarScanFilter.setTldScan("dwr-*.jar,jstl-*.jar,spring-security-taglibs-*.jar,spring-web-*.jar,spring-webmvc-*.jar,string-*.jar,taglibs-standard-impl-*.jar,tomcat-annotations-api-*.jar,tomcat-embed-jasper-*.jar");
-                standardJarScanFilter.setTldSkip("*");
-                context.getJarScanner().setJarScanFilter(standardJarScanFilter);
-
-                boolean development = (System.getProperty("airsonic.development") != null);
-
-                // Increase the size and time before eviction of the Tomcat
-                // cache so that resources aren't uncompressed too often.
-                // See https://github.com/jhipster/generator-jhipster/issues/3995
-
-                StandardRoot resources = new StandardRoot();
-                if (development) {
-                    resources.setCachingAllowed(false);
-                } else {
-                    resources.setCacheMaxSize(100000);
-                    resources.setCacheObjectMaxSize(4000);
-                    resources.setCacheTtl(24 * 3600 * 1000);  // 1 day, in milliseconds
-                }
-                context.setResources(resources);
-
-                // Put Jasper in production mode so that JSP aren't recompiled
-                // on each request.
-                // See http://stackoverflow.com/questions/29653326/spring-boot-application-slow-because-of-jsp-compilation
-                Container jsp = context.findChild("jsp");
-                if (jsp instanceof Wrapper) {
-                    ((Wrapper) jsp).addInitParameter("development", Boolean.toString(development));
-                }
-            });
+        tomcatFactory.addContextCustomizers((TomcatContextCustomizer) context -> {
+
+            StandardJarScanFilter standardJarScanFilter = new StandardJarScanFilter();
+            standardJarScanFilter.setTldScan("dwr-*.jar,jstl-*.jar,spring-security-taglibs-*.jar,spring-web-*.jar,spring-webmvc-*.jar,string-*.jar,taglibs-standard-impl-*.jar,tomcat-annotations-api-*.jar,tomcat-embed-jasper-*.jar");
+            standardJarScanFilter.setTldSkip("*");
+            context.getJarScanner().setJarScanFilter(standardJarScanFilter);
+
+            boolean development = (System.getProperty("airsonic.development") != null);
+
+            // Increase the size and time before eviction of the Tomcat
+            // cache so that resources aren't uncompressed too often.
+            // See https://github.com/jhipster/generator-jhipster/issues/3995
+
+            StandardRoot resources = new StandardRoot();
+            if (development) {
+                resources.setCachingAllowed(false);
+            } else {
+                resources.setCacheMaxSize(100000);
+                resources.setCacheObjectMaxSize(4000);
+                resources.setCacheTtl(24 * 3600 * 1000);  // 1 day, in milliseconds
+            }
+            context.setResources(resources);
+
+            // Put Jasper in production mode so that JSP aren't recompiled
+            // on each request.
+            // See http://stackoverflow.com/questions/29653326/spring-boot-application-slow-because-of-jsp-compilation
+            Container jsp = context.findChild("jsp");
+            if (jsp instanceof Wrapper) {
+                ((Wrapper) jsp).addInitParameter("development", Boolean.toString(development));
+            }
+        });
     }
 }

airsonic-main/src/main/java/org/airsonic/player/controller/HelpController.java

@@ -103,7 +103,7 @@ public class HelpController {
             String current;
             while((current = reader.readLine()) != null) {
                 if (lines.size() >= LOG_LINES_TO_SHOW) {
-                  break;
+                    break;
                 }
                 lines.add(0, current);
             }

airsonic-main/src/main/java/org/airsonic/player/controller/ImportPlaylistController.java

@@ -57,8 +57,8 @@ public class ImportPlaylistController {
 
     @PostMapping
     protected String handlePost(RedirectAttributes redirectAttributes,
-                                           HttpServletRequest request
-                                           ) throws Exception {
+                                HttpServletRequest request
+    ) throws Exception {
         Map<String, Object> map = new HashMap<String, Object>();
 
         try {
@@ -79,7 +79,7 @@ public class ImportPlaylistController {
                         String format = StringUtils.lowerCase(FilenameUtils.getExtension(item.getName()));
                         String username = securityService.getCurrentUsername(request);
                         Playlist playlist = playlistService.importPlaylist(username, playlistName, fileName,
-                                                                           item.getInputStream(), null);
+                                item.getInputStream(), null);
                         map.put("playlist", playlist);
                     }
                 }

airsonic-main/src/main/java/org/airsonic/player/controller/MainController.java

@@ -171,7 +171,7 @@ public class MainController  {
         }
 
         return new ModelAndView(view, "model", map);
-}
+    }
 
     private <T> boolean trimToSize(Boolean showAll, List<T> list, int userPaginationPreference) {
         boolean trimmed = false;

airsonic-main/src/main/java/org/airsonic/player/controller/RecoverController.java

@@ -75,8 +75,8 @@ public class RecoverController {
             } else {
                 StringBuilder sb = new StringBuilder(PASSWORD_LENGTH);
                 for(int i=0; i<PASSWORD_LENGTH; i++) {
-                  int index = random.nextInt(SYMBOLS.length());
-                  sb.append(SYMBOLS.charAt(index));
+                    int index = random.nextInt(SYMBOLS.length());
+                    sb.append(SYMBOLS.charAt(index));
                 }
                 String password = sb.toString();
 

airsonic-main/src/main/java/org/airsonic/player/controller/SettingsController.java

@@ -42,7 +42,7 @@ public class SettingsController  {
     @Autowired
     private SecurityService securityService;
 
-@GetMapping
+    @GetMapping
     protected ModelAndView handleRequestInternal(HttpServletRequest request) throws Exception {
 
         User user = securityService.getCurrentUser(request);
@@ -51,6 +51,6 @@ public class SettingsController  {
         String view = user.isAdminRole() ? "musicFolderSettings" : "personalSettings";
 
         return new ModelAndView(new RedirectView(view));
-     }
+    }
 
 }

airsonic-main/src/main/java/org/airsonic/player/controller/UploadController.java

@@ -174,7 +174,7 @@ public class UploadController {
                 ZipEntry entry = (ZipEntry) entries.nextElement();
                 File entryFile = new File(file.getParentFile(), entry.getName());
                 if (!entryFile.toPath().normalize().startsWith(file.getParentFile().toPath())) {
-                  throw new Exception("Bad zip filename: " + StringUtil.toHtml(entryFile.getPath()));
+                    throw new Exception("Bad zip filename: " + StringUtil.toHtml(entryFile.getPath()));
                 }
 
                 if (!entry.isDirectory()) {

airsonic-main/src/main/java/org/airsonic/player/controller/UserSettingsController.java

@@ -76,7 +76,7 @@ public class UserSettingsController {
     protected String displayForm(HttpServletRequest request, Model model) throws Exception {
         UserSettingsCommand command;
         if(!model.containsAttribute("command")) {
-             command = new UserSettingsCommand();
+            command = new UserSettingsCommand();
 
             User user = getUser(request);
             if (user != null) {

airsonic-main/src/main/java/org/airsonic/player/dao/AbstractDao.java

@@ -60,8 +60,8 @@ public class AbstractDao {
     }
 
     protected String questionMarks(String columns) {
-       int numberOfColumns =  StringUtils.countMatches(columns, ",") + 1;
-       return StringUtils.repeat("?", ", ", numberOfColumns);
+        int numberOfColumns =  StringUtils.countMatches(columns, ",") + 1;
+        return StringUtils.repeat("?", ", ", numberOfColumns);
     }
 
     protected String prefix(String columns, String prefix) {

airsonic-main/src/main/java/org/airsonic/player/dao/RatingDao.java

@@ -51,10 +51,10 @@ public class RatingDao extends AbstractDao {
         }
 
         Map<String, Object> args = new HashMap<>();
-          args.put("type", MediaFile.MediaType.ALBUM.name());
-          args.put("folders", MusicFolder.toPathList(musicFolders));
-          args.put("count", count);
-          args.put("offset", offset);
+        args.put("type", MediaFile.MediaType.ALBUM.name());
+        args.put("folders", MusicFolder.toPathList(musicFolders));
+        args.put("count", count);
+        args.put("offset", offset);
 
         String sql = "select user_rating.path from user_rating, media_file " +
                      "where user_rating.path=media_file.path and media_file.present and media_file.type = :type and media_file.folder in (:folders) " +

airsonic-main/src/main/java/org/airsonic/player/domain/SearchResult.java

@@ -59,7 +59,7 @@ public class SearchResult {
         this.offset = offset;
     }
 
-      public int getTotalHits() {
+    public int getTotalHits() {
         return totalHits;
     }
 

airsonic-main/src/main/java/org/airsonic/player/security/GlobalSecurityConfig.java

@@ -74,9 +74,9 @@ public class GlobalSecurityConfig extends GlobalAuthenticationConfigurerAdapter
     }
 
     private static String generateRememberMeKey() {
-      byte[] array = new byte[32];
-      new SecureRandom().nextBytes(array);
-      return new String(array);
+        byte[] array = new byte[32];
+        new SecureRandom().nextBytes(array);
+        return new String(array);
     }
 
     @Configuration

airsonic-main/src/main/java/org/airsonic/player/security/JWTAuthenticationProvider.java

@@ -46,9 +46,7 @@ public class JWTAuthenticationProvider implements AuthenticationProvider {
         // TODO:AD This is super unfortunate, but not sure there is a better way when using JSP
         if(StringUtils.contains(authentication.getRequestedPath(), "/WEB-INF/jsp/")) {
             logger.warn("BYPASSING AUTH FOR WEB-INF page");
-        } else
-
-        if(!roughlyEqual(path.asString(), authentication.getRequestedPath())) {
+        } else if(!roughlyEqual(path.asString(), authentication.getRequestedPath())) {
             throw new InsufficientAuthenticationException("Credentials not valid for path " + authentication
                     .getRequestedPath() + ". They are valid for " + path.asString());
         }

airsonic-main/src/main/java/org/airsonic/player/security/JWTRequestParameterProcessingFilter.java

@@ -31,11 +31,11 @@ public class JWTRequestParameterProcessingFilter implements Filter {
     }
 
     public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException, IOException, ServletException {
-            Optional<JWTAuthenticationToken> token = findToken(request);
-            if(token.isPresent()) {
-                return authenticationManager.authenticate(token.get());
-            }
-            throw new AuthenticationServiceException("Invalid auth method");
+        Optional<JWTAuthenticationToken> token = findToken(request);
+        if(token.isPresent()) {
+            return authenticationManager.authenticate(token.get());
+        }
+        throw new AuthenticationServiceException("Invalid auth method");
     }
 
     private static Optional<JWTAuthenticationToken> findToken(HttpServletRequest request) {

airsonic-main/src/main/java/org/airsonic/player/service/PodcastService.java

@@ -74,10 +74,10 @@ public class PodcastService {
 
     private static final Logger LOG = LoggerFactory.getLogger(PodcastService.class);
     private static final DateFormat[] RSS_DATE_FORMATS = {new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss Z", Locale.US),
-            new SimpleDateFormat("dd MMM yyyy HH:mm:ss Z", Locale.US)};
+        new SimpleDateFormat("dd MMM yyyy HH:mm:ss Z", Locale.US)};
 
     private static final Namespace[] ITUNES_NAMESPACES = {Namespace.getNamespace("http://www.itunes.com/DTDs/Podcast-1.0.dtd"),
-            Namespace.getNamespace("http://www.itunes.com/dtds/podcast-1.0.dtd")};
+        Namespace.getNamespace("http://www.itunes.com/dtds/podcast-1.0.dtd")};
 
     private final ExecutorService refreshExecutor;
     private final ExecutorService downloadExecutor;
@@ -704,7 +704,7 @@ public class PodcastService {
         File channelDir = new File(podcastDir, StringUtil.fileSystemSafe(channel.getTitle()));
 
         if (!podcastDir.canWrite()) {
-          throw new RuntimeException("The podcasts directory " + podcastDir + " isn't writeable.");
+            throw new RuntimeException("The podcasts directory " + podcastDir + " isn't writeable.");
         }
 
         if (!channelDir.exists()) {

airsonic-main/src/main/java/org/airsonic/player/service/search/SearchServiceImpl.java

@@ -168,7 +168,7 @@ public class SearchServiceImpl implements SearchService {
 
             Query query = queryFactory.getRandomSongs(criteria);
             return createRandomDocsList(criteria.getCount(), searcher, query,
-                    (dist, id) -> util.addIgnoreNull(dist, SONG, id));
+                (dist, id) -> util.addIgnoreNull(dist, SONG, id));
 
         } catch (IOException e) {
             LOG.error("Failed to search or random songs.", e);
@@ -191,7 +191,7 @@ public class SearchServiceImpl implements SearchService {
 
             Query query = queryFactory.getRandomAlbums(musicFolders);
             return createRandomDocsList(count, searcher, query,
-                    (dist, id) -> util.addIgnoreNull(dist, ALBUM, id));
+                (dist, id) -> util.addIgnoreNull(dist, ALBUM, id));
 
         } catch (IOException e) {
             LOG.error("Failed to search for random albums.", e);
@@ -214,7 +214,7 @@ public class SearchServiceImpl implements SearchService {
 
             Query query = queryFactory.getRandomAlbumsId3(musicFolders);
             return createRandomDocsList(count, searcher, query,
-                    (dist, id) -> util.addIgnoreNull(dist, ALBUM_ID3, id));
+                (dist, id) -> util.addIgnoreNull(dist, ALBUM_ID3, id));
 
         } catch (IOException e) {
             LOG.error("Failed to search for random albums.", e);

airsonic-main/src/main/java/org/airsonic/player/service/upnp/DispatchingContentDirectory.java

@@ -153,20 +153,20 @@ public class DispatchingContentDirectory extends CustomContentDirectory {
 
     private UpnpContentProcessor findProcessor(String type) {
         switch(type) {
-        case CONTAINER_ID_ROOT:
-            return getRootProcessor();
-        case CONTAINER_ID_PLAYLIST_PREFIX:
-            return getPlaylistProcessor();
-        case CONTAINER_ID_FOLDER_PREFIX:
-            return getMediaFileProcessor();
-        case CONTAINER_ID_ALBUM_PREFIX:
-            return getAlbumProcessor();
-        case CONTAINER_ID_RECENT_PREFIX:
-            return getRecentAlbumProcessor();
-        case CONTAINER_ID_ARTIST_PREFIX:
-            return getArtistProcessor();
-        case CONTAINER_ID_GENRE_PREFIX:
-            return getGenreProcessor();
+            case CONTAINER_ID_ROOT:
+                return getRootProcessor();
+            case CONTAINER_ID_PLAYLIST_PREFIX:
+                return getPlaylistProcessor();
+            case CONTAINER_ID_FOLDER_PREFIX:
+                return getMediaFileProcessor();
+            case CONTAINER_ID_ALBUM_PREFIX:
+                return getAlbumProcessor();
+            case CONTAINER_ID_RECENT_PREFIX:
+                return getRecentAlbumProcessor();
+            case CONTAINER_ID_ARTIST_PREFIX:
+                return getArtistProcessor();
+            case CONTAINER_ID_GENRE_PREFIX:
+                return getGenreProcessor();
         }
         return null;
     }

airsonic-main/src/main/java/org/airsonic/player/util/FileUtil.java

@@ -140,13 +140,7 @@ public final class FileUtil {
     }
 
     private static <T> T timed(FileTask<T> task) {
-//        long t0 = System.nanoTime();
-//        try {
-            return task.execute();
-//        } finally {
-//            long t1 = System.nanoTime();
-//            LOG.debug((t1 - t0) / 1000L + " microsec, " + task);
-//        }
+        return task.execute();
     }
 
     private abstract static class FileTask<T> {

checkstyle.xml

@@ -24,6 +24,7 @@
         <module name="EmptyStatement"/>
         <module name="EqualsAvoidNull"/>
         <module name="EqualsHashCode"/>
+        <module name="Indentation"/>
         <module name="InnerAssignment"/>
         <module name="RedundantImport"/>
         <module name="StringLiteralEquality"/>