Merge pull request #907 from Isira-Seneviratne/Remove_EmptyString

Remove EMPTY_STRING.

extractor/src/main/java/org/schabi/newpipe/extractor/comments/CommentsInfoItemExtractor.java

@@ -6,7 +6,6 @@ import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.localization.DateWrapper;
 import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeCommentsInfoItemExtractor;
 import org.schabi.newpipe.extractor.stream.StreamExtractor;
-import org.schabi.newpipe.extractor.utils.Utils;
 
 import javax.annotation.Nullable;
 
@@ -36,14 +35,14 @@ public interface CommentsInfoItemExtractor extends InfoItemExtractor {
      * It may be language dependent
      */
     default String getTextualLikeCount() throws ParsingException {
-        return Utils.EMPTY_STRING;
+        return "";
     }
 
     /**
      * The text of the comment
      */
     default String getCommentText() throws ParsingException {
-        return Utils.EMPTY_STRING;
+        return "";
     }
 
     /**
@@ -52,7 +51,7 @@ public interface CommentsInfoItemExtractor extends InfoItemExtractor {
      * @see StreamExtractor#getTextualUploadDate()
      */
     default String getTextualUploadDate() throws ParsingException {
-        return Utils.EMPTY_STRING;
+        return "";
     }
 
     /**
@@ -66,19 +65,19 @@ public interface CommentsInfoItemExtractor extends InfoItemExtractor {
     }
 
     default String getCommentId() throws ParsingException {
-        return Utils.EMPTY_STRING;
+        return "";
     }
 
     default String getUploaderUrl() throws ParsingException {
-        return Utils.EMPTY_STRING;
+        return "";
     }
 
     default String getUploaderName() throws ParsingException {
-        return Utils.EMPTY_STRING;
+        return "";
     }
 
     default String getUploaderAvatarUrl() throws ParsingException {
-        return Utils.EMPTY_STRING;
+        return "";
     }
 
     /**

extractor/src/main/java/org/schabi/newpipe/extractor/linkhandler/ListLinkHandler.java

@@ -1,7 +1,5 @@
 package org.schabi.newpipe.extractor.linkhandler;
 
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-
 import java.util.Collections;
 import java.util.List;
 
@@ -32,7 +30,7 @@ public class ListLinkHandler extends LinkHandler {
                 handler.url,
                 handler.id,
                 Collections.emptyList(),
-                EMPTY_STRING);
+                "");
     }
 
     public List<String> getContentFilters() {

extractor/src/main/java/org/schabi/newpipe/extractor/linkhandler/SearchQueryHandlerFactory.java

@@ -1,7 +1,5 @@
 package org.schabi.newpipe.extractor.linkhandler;
 
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
 
 import java.util.Collections;
@@ -39,7 +37,7 @@ public abstract class SearchQueryHandlerFactory extends ListLinkHandlerFactory {
     }
 
     public SearchQueryHandler fromQuery(final String query) throws ParsingException {
-        return fromQuery(query, Collections.emptyList(), EMPTY_STRING);
+        return fromQuery(query, Collections.emptyList(), "");
     }
 
     /**

extractor/src/main/java/org/schabi/newpipe/extractor/playlist/PlaylistExtractor.java

@@ -8,8 +8,6 @@ import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 
 import javax.annotation.Nonnull;
 
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-
 public abstract class PlaylistExtractor extends ListExtractor<StreamInfoItem> {
 
     public PlaylistExtractor(final StreamingService service, final ListLinkHandler linkHandler) {
@@ -25,29 +23,29 @@ public abstract class PlaylistExtractor extends ListExtractor<StreamInfoItem> {
 
     @Nonnull
     public String getThumbnailUrl() throws ParsingException {
-        return EMPTY_STRING;
+        return "";
     }
 
     @Nonnull
     public String getBannerUrl() throws ParsingException {
         // Banner can't be handled by frontend right now.
         // Whoever is willing to implement this should also implement it in the frontend.
-        return EMPTY_STRING;
+        return "";
     }
 
     @Nonnull
     public String getSubChannelName() throws ParsingException {
-        return EMPTY_STRING;
+        return "";
     }
 
     @Nonnull
     public String getSubChannelUrl() throws ParsingException {
-        return EMPTY_STRING;
+        return "";
     }
 
     @Nonnull
     public String getSubChannelAvatarUrl() throws ParsingException {
-        return EMPTY_STRING;
+        return "";
     }
 
     public PlaylistInfo.PlaylistType getPlaylistType() throws ParsingException {

extractor/src/main/java/org/schabi/newpipe/extractor/services/bandcamp/extractors/BandcampPlaylistExtractor.java

@@ -3,7 +3,6 @@ package org.schabi.newpipe.extractor.services.bandcamp.extractors;
 import static org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampExtractorHelper.getImageUrl;
 import static org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampStreamExtractor.getAlbumInfoJson;
 import static org.schabi.newpipe.extractor.utils.JsonUtils.getJsonData;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.HTTPS;
 
 import com.grack.nanojson.JsonArray;
@@ -73,7 +72,7 @@ public class BandcampPlaylistExtractor extends PlaylistExtractor {
     @Override
     public String getThumbnailUrl() throws ParsingException {
         if (albumJson.isNull("art_id")) {
-            return EMPTY_STRING;
+            return "";
         } else {
             return getImageUrl(albumJson.getLong("art_id"), true);
         }
@@ -96,7 +95,7 @@ public class BandcampPlaylistExtractor extends PlaylistExtractor {
         return document.getElementsByClass("band-photo").stream()
                 .map(element -> element.attr("src"))
                 .findFirst()
-                .orElse(EMPTY_STRING);
+                .orElse("");
     }
 
     @Override

extractor/src/main/java/org/schabi/newpipe/extractor/services/bandcamp/extractors/BandcampRadioStreamExtractor.java

@@ -1,9 +1,14 @@
 package org.schabi.newpipe.extractor.services.bandcamp.extractors;
 
+import static org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampExtractorHelper.BASE_API_URL;
+import static org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampExtractorHelper.BASE_URL;
+import static org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampExtractorHelper.getImageUrl;
+
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonObject;
 import com.grack.nanojson.JsonParser;
 import com.grack.nanojson.JsonParserException;
+
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Element;
 import org.schabi.newpipe.extractor.MediaFormat;
@@ -20,17 +25,13 @@ import org.schabi.newpipe.extractor.stream.AudioStream;
 import org.schabi.newpipe.extractor.stream.Description;
 import org.schabi.newpipe.extractor.stream.StreamSegment;
 
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
-import static org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampExtractorHelper.BASE_API_URL;
-import static org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampExtractorHelper.BASE_URL;
-import static org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampExtractorHelper.getImageUrl;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
 public class BandcampRadioStreamExtractor extends BandcampStreamExtractor {
 
@@ -163,14 +164,14 @@ public class BandcampRadioStreamExtractor extends BandcampStreamExtractor {
     @Override
     public String getLicence() {
         // Contrary to other Bandcamp streams, radio streams don't have a license
-        return EMPTY_STRING;
+        return "";
     }
 
     @Nonnull
     @Override
     public String getCategory() {
         // Contrary to other Bandcamp streams, radio streams don't have categories
-        return EMPTY_STRING;
+        return "";
     }
 
     @Nonnull

extractor/src/main/java/org/schabi/newpipe/extractor/services/bandcamp/extractors/BandcampSearchExtractor.java

@@ -2,29 +2,28 @@
 
 package org.schabi.newpipe.extractor.services.bandcamp.extractors;
 
-import edu.umd.cs.findbugs.annotations.NonNull;
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
 import org.jsoup.nodes.Element;
 import org.jsoup.select.Elements;
 import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.MetaInfo;
+import org.schabi.newpipe.extractor.MultiInfoItemsCollector;
 import org.schabi.newpipe.extractor.Page;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.downloader.Downloader;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.linkhandler.SearchQueryHandler;
-import org.schabi.newpipe.extractor.MultiInfoItemsCollector;
 import org.schabi.newpipe.extractor.search.SearchExtractor;
 import org.schabi.newpipe.extractor.services.bandcamp.extractors.streaminfoitem.BandcampSearchStreamInfoItemExtractor;
-import org.schabi.newpipe.extractor.utils.Utils;
 
-import javax.annotation.Nonnull;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.List;
 
+import javax.annotation.Nonnull;
+
 public class BandcampSearchExtractor extends SearchExtractor {
 
     public BandcampSearchExtractor(final StreamingService service,
@@ -32,10 +31,10 @@ public class BandcampSearchExtractor extends SearchExtractor {
         super(service, linkHandler);
     }
 
-    @NonNull
+    @Nonnull
     @Override
     public String getSearchSuggestion() {
-        return Utils.EMPTY_STRING;
+        return "";
     }
 
     @Override
@@ -59,7 +58,7 @@ public class BandcampSearchExtractor extends SearchExtractor {
                     .flatMap(element -> element.getElementsByClass("itemtype").stream())
                     .map(Element::text)
                     .findFirst()
-                    .orElse(Utils.EMPTY_STRING);
+                    .orElse("");
 
             switch (type) {
                 case "ARTIST":

extractor/src/main/java/org/schabi/newpipe/extractor/services/bandcamp/extractors/BandcampStreamExtractor.java

@@ -3,7 +3,6 @@
 package org.schabi.newpipe.extractor.services.bandcamp.extractors;
 
 import static org.schabi.newpipe.extractor.services.bandcamp.extractors.BandcampExtractorHelper.getImageUrl;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.HTTPS;
 
 import com.grack.nanojson.JsonObject;
@@ -28,13 +27,14 @@ import org.schabi.newpipe.extractor.stream.VideoStream;
 import org.schabi.newpipe.extractor.utils.JsonUtils;
 import org.schabi.newpipe.extractor.utils.Utils;
 
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.List;
 import java.util.stream.Collectors;
 
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
 public class BandcampStreamExtractor extends StreamExtractor {
     private JsonObject albumJson;
     private JsonObject current;
@@ -118,7 +118,7 @@ public class BandcampStreamExtractor extends StreamExtractor {
     @Override
     public String getThumbnailUrl() throws ParsingException {
         if (albumJson.isNull("art_id")) {
-            return EMPTY_STRING;
+            return "";
         }
 
         return getImageUrl(albumJson.getLong("art_id"), true);
@@ -130,7 +130,7 @@ public class BandcampStreamExtractor extends StreamExtractor {
         return document.getElementsByClass("band-photo").stream()
                 .map(element -> element.attr("src"))
                 .findFirst()
-                .orElse(Utils.EMPTY_STRING);
+                .orElse("");
     }
 
     @Nonnull
@@ -194,7 +194,7 @@ public class BandcampStreamExtractor extends StreamExtractor {
                 .flatMap(element -> element.getElementsByClass("tag").stream())
                 .map(Element::text)
                 .findFirst()
-                .orElse(EMPTY_STRING);
+                .orElse("");
     }
 
     @Nonnull

extractor/src/main/java/org/schabi/newpipe/extractor/services/media_ccc/extractors/MediaCCCLiveStreamExtractor.java

@@ -1,5 +1,8 @@
 package org.schabi.newpipe.extractor.services.media_ccc.extractors;
 
+import static org.schabi.newpipe.extractor.stream.AudioStream.UNKNOWN_BITRATE;
+import static org.schabi.newpipe.extractor.stream.Stream.ID_UNKNOWN;
+
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonObject;
 
@@ -25,10 +28,6 @@ import java.util.stream.Collectors;
 
 import javax.annotation.Nonnull;
 
-import static org.schabi.newpipe.extractor.stream.AudioStream.UNKNOWN_BITRATE;
-import static org.schabi.newpipe.extractor.stream.Stream.ID_UNKNOWN;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-
 public class MediaCCCLiveStreamExtractor extends StreamExtractor {
     private static final String STREAMS = "streams";
     private static final String URLS = "urls";
@@ -149,9 +148,9 @@ public class MediaCCCLiveStreamExtractor extends StreamExtractor {
                 .map(JsonObject.class::cast)
                 .map(streamObject -> streamObject.getObject(URLS))
                 .filter(urls -> urls.has(deliveryMethod))
-                .map(urls -> urls.getObject(deliveryMethod).getString(URL, EMPTY_STRING))
+                .map(urls -> urls.getObject(deliveryMethod).getString(URL, ""))
                 .findFirst()
-                .orElse(EMPTY_STRING);
+                .orElse("");
     }
 
     @Override

extractor/src/main/java/org/schabi/newpipe/extractor/services/peertube/extractors/PeertubeCommentsInfoItemExtractor.java

@@ -1,6 +1,7 @@
 package org.schabi.newpipe.extractor.services.peertube.extractors;
 
 import com.grack.nanojson.JsonObject;
+
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
 import org.schabi.newpipe.extractor.ServiceList;
@@ -12,8 +13,6 @@ import org.schabi.newpipe.extractor.utils.JsonUtils;
 
 import java.util.Objects;
 
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-
 public class PeertubeCommentsInfoItemExtractor implements CommentsInfoItemExtractor {
     private final JsonObject item;
     private final String url;
@@ -66,7 +65,7 @@ public class PeertubeCommentsInfoItemExtractor implements CommentsInfoItemExtrac
             final Document doc = Jsoup.parse(htmlText);
             return doc.body().text();
         } catch (final Exception e) {
-            return htmlText.replaceAll("(?s)<[^>]*>(\\s*<[^>]*>)*", EMPTY_STRING);
+            return htmlText.replaceAll("(?s)<[^>]*>(\\s*<[^>]*>)*", "");
         }
     }
 

extractor/src/main/java/org/schabi/newpipe/extractor/services/peertube/extractors/PeertubeStreamExtractor.java

@@ -1,5 +1,6 @@
 package org.schabi.newpipe.extractor.services.peertube.extractors;
 
+import static org.schabi.newpipe.extractor.stream.AudioStream.UNKNOWN_BITRATE;
 import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 
@@ -45,9 +46,6 @@ import java.util.stream.Collectors;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
-import static org.schabi.newpipe.extractor.stream.AudioStream.UNKNOWN_BITRATE;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-
 public class PeertubeStreamExtractor extends StreamExtractor {
     private static final String ACCOUNT_HOST = "account.host";
     private static final String ACCOUNT_NAME = "account.name";
@@ -219,11 +217,10 @@ public class PeertubeStreamExtractor extends StreamExtractor {
 
         if (getStreamType() == StreamType.VIDEO_STREAM
                 && !isNullOrEmpty(json.getObject(FILES))) {
-            return json.getObject(FILES).getString(PLAYLIST_URL, EMPTY_STRING);
+            return json.getObject(FILES).getString(PLAYLIST_URL, "");
         }
 
-        return json.getArray(STREAMING_PLAYLISTS).getObject(0).getString(PLAYLIST_URL,
-                EMPTY_STRING);
+        return json.getArray(STREAMING_PLAYLISTS).getObject(0).getString(PLAYLIST_URL, "");
     }
 
     @Override
@@ -319,7 +316,7 @@ public class PeertubeStreamExtractor extends StreamExtractor {
         try {
             return JsonUtils.getString(json, "support");
         } catch (final ParsingException e) {
-            return EMPTY_STRING;
+            return "";
         }
     }
 
@@ -440,9 +437,9 @@ public class PeertubeStreamExtractor extends StreamExtractor {
                     .map(JsonObject.class::cast)
                     .map(stream -> new VideoStream.Builder()
                             .setId(String.valueOf(stream.getInt("id", -1)))
-                            .setContent(stream.getString(PLAYLIST_URL, EMPTY_STRING), true)
+                            .setContent(stream.getString(PLAYLIST_URL, ""), true)
                             .setIsVideoOnly(false)
-                            .setResolution(EMPTY_STRING)
+                            .setResolution("")
                             .setMediaFormat(MediaFormat.MPEG_4)
                             .setDeliveryMethod(DeliveryMethod.HLS)
                             .build())
@@ -457,7 +454,7 @@ public class PeertubeStreamExtractor extends StreamExtractor {
 
     private void getStreams() throws ParsingException {
         // Progressive streams
-        getStreamsFromArray(json.getArray(FILES), EMPTY_STRING);
+        getStreamsFromArray(json.getArray(FILES), "");
 
         // HLS streams
         try {

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudParsingHelper.java

@@ -1,7 +1,6 @@
 package org.schabi.newpipe.extractor.services.soundcloud;
 
 import static org.schabi.newpipe.extractor.ServiceList.SoundCloud;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 import static org.schabi.newpipe.extractor.utils.Utils.replaceHttpWithHttps;
@@ -313,17 +312,17 @@ public final class SoundcloudParsingHelper {
 
     @Nonnull
     public static String getUploaderUrl(final JsonObject object) {
-        final String url = object.getObject("user").getString("permalink_url", EMPTY_STRING);
+        final String url = object.getObject("user").getString("permalink_url", "");
         return replaceHttpWithHttps(url);
     }
 
     @Nonnull
     public static String getAvatarUrl(final JsonObject object) {
-        final String url = object.getObject("user").getString("avatar_url", EMPTY_STRING);
+        final String url = object.getObject("user").getString("avatar_url", "");
         return replaceHttpWithHttps(url);
     }
 
     public static String getUploaderName(final JsonObject object) {
-        return object.getObject("user").getString("username", EMPTY_STRING);
+        return object.getObject("user").getString("username", "");
     }
 }

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/extractors/SoundcloudChannelExtractor.java

@@ -1,8 +1,12 @@
 package org.schabi.newpipe.extractor.services.soundcloud.extractors;
 
+import static org.schabi.newpipe.extractor.services.soundcloud.SoundcloudParsingHelper.SOUNDCLOUD_API_V2_URL;
+import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+
 import com.grack.nanojson.JsonObject;
 import com.grack.nanojson.JsonParser;
 import com.grack.nanojson.JsonParserException;
+
 import org.schabi.newpipe.extractor.Page;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.channel.ChannelExtractor;
@@ -14,12 +18,9 @@ import org.schabi.newpipe.extractor.services.soundcloud.SoundcloudParsingHelper;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 
-import javax.annotation.Nonnull;
 import java.io.IOException;
 
-import static org.schabi.newpipe.extractor.services.soundcloud.SoundcloudParsingHelper.SOUNDCLOUD_API_V2_URL;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+import javax.annotation.Nonnull;
 
 public class SoundcloudChannelExtractor extends ChannelExtractor {
     private String userId;
@@ -82,7 +83,7 @@ public class SoundcloudChannelExtractor extends ChannelExtractor {
 
     @Override
     public String getDescription() {
-        return user.getString("description", EMPTY_STRING);
+        return user.getString("description", "");
     }
 
     @Override

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/extractors/SoundcloudChannelInfoItemExtractor.java

@@ -1,11 +1,11 @@
 package org.schabi.newpipe.extractor.services.soundcloud.extractors;
 
-import com.grack.nanojson.JsonObject;
-import org.schabi.newpipe.extractor.channel.ChannelInfoItemExtractor;
-
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.replaceHttpWithHttps;
 
+import com.grack.nanojson.JsonObject;
+
+import org.schabi.newpipe.extractor.channel.ChannelInfoItemExtractor;
+
 public class SoundcloudChannelInfoItemExtractor implements ChannelInfoItemExtractor {
     private final JsonObject itemObject;
 
@@ -26,7 +26,7 @@ public class SoundcloudChannelInfoItemExtractor implements ChannelInfoItemExtrac
     @Override
     public String getThumbnailUrl() {
         // An avatar URL with a better resolution
-        return itemObject.getString("avatar_url", EMPTY_STRING).replace("large.jpg", "crop.jpg");
+        return itemObject.getString("avatar_url", "").replace("large.jpg", "crop.jpg");
     }
 
     @Override
@@ -46,6 +46,6 @@ public class SoundcloudChannelInfoItemExtractor implements ChannelInfoItemExtrac
 
     @Override
     public String getDescription() {
-        return itemObject.getString("description", EMPTY_STRING);
+        return itemObject.getString("description", "");
     }
 }

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/extractors/SoundcloudPlaylistExtractor.java

@@ -1,5 +1,8 @@
 package org.schabi.newpipe.extractor.services.soundcloud.extractors;
 
+import static org.schabi.newpipe.extractor.services.soundcloud.SoundcloudParsingHelper.SOUNDCLOUD_API_V2_URL;
+import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonObject;
 import com.grack.nanojson.JsonParser;
@@ -23,10 +26,6 @@ import java.util.List;
 
 import javax.annotation.Nonnull;
 
-import static org.schabi.newpipe.extractor.services.soundcloud.SoundcloudParsingHelper.SOUNDCLOUD_API_V2_URL;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
-
 public class SoundcloudPlaylistExtractor extends PlaylistExtractor {
     private static final int STREAMS_PER_REQUESTED_PAGE = 15;
 
@@ -87,7 +86,7 @@ public class SoundcloudPlaylistExtractor extends PlaylistExtractor {
             }
 
             if (artworkUrl == null) {
-                return EMPTY_STRING;
+                return "";
             }
         }
 

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/extractors/SoundcloudPlaylistInfoItemExtractor.java

@@ -1,12 +1,12 @@
 package org.schabi.newpipe.extractor.services.soundcloud.extractors;
 
+import static org.schabi.newpipe.extractor.utils.Utils.replaceHttpWithHttps;
+
 import com.grack.nanojson.JsonObject;
+
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.playlist.PlaylistInfoItemExtractor;
 
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-import static org.schabi.newpipe.extractor.utils.Utils.replaceHttpWithHttps;
-
 public class SoundcloudPlaylistInfoItemExtractor implements PlaylistInfoItemExtractor {
     private static final String USER_KEY = "user";
     private static final String AVATAR_URL_KEY = "avatar_url";
@@ -32,7 +32,7 @@ public class SoundcloudPlaylistInfoItemExtractor implements PlaylistInfoItemExtr
     public String getThumbnailUrl() throws ParsingException {
         // Over-engineering at its finest
         if (itemObject.isString(ARTWORK_URL_KEY)) {
-            final String artworkUrl = itemObject.getString(ARTWORK_URL_KEY, EMPTY_STRING);
+            final String artworkUrl = itemObject.getString(ARTWORK_URL_KEY, "");
             if (!artworkUrl.isEmpty()) {
                 // An artwork URL with a better resolution
                 return artworkUrl.replace("large.jpg", "crop.jpg");
@@ -46,7 +46,7 @@ public class SoundcloudPlaylistInfoItemExtractor implements PlaylistInfoItemExtr
 
                 // First look for track artwork url
                 if (trackObject.isString(ARTWORK_URL_KEY)) {
-                    final String artworkUrl = trackObject.getString(ARTWORK_URL_KEY, EMPTY_STRING);
+                    final String artworkUrl = trackObject.getString(ARTWORK_URL_KEY, "");
                     if (!artworkUrl.isEmpty()) {
                         // An artwork URL with a better resolution
                         return artworkUrl.replace("large.jpg", "crop.jpg");
@@ -55,7 +55,7 @@ public class SoundcloudPlaylistInfoItemExtractor implements PlaylistInfoItemExtr
 
                 // Then look for track creator avatar url
                 final JsonObject creator = trackObject.getObject(USER_KEY);
-                final String creatorAvatar = creator.getString(AVATAR_URL_KEY, EMPTY_STRING);
+                final String creatorAvatar = creator.getString(AVATAR_URL_KEY, "");
                 if (!creatorAvatar.isEmpty()) {
                     return creatorAvatar;
                 }
@@ -66,7 +66,7 @@ public class SoundcloudPlaylistInfoItemExtractor implements PlaylistInfoItemExtr
 
         try {
             // Last resort, use user avatar url. If still not found, then throw exception.
-            return itemObject.getObject(USER_KEY).getString(AVATAR_URL_KEY, EMPTY_STRING);
+            return itemObject.getObject(USER_KEY).getString(AVATAR_URL_KEY, "");
         } catch (final Exception e) {
             throw new ParsingException("Failed to extract playlist thumbnail url", e);
         }

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/extractors/SoundcloudSearchExtractor.java

@@ -1,5 +1,8 @@
 package org.schabi.newpipe.extractor.services.soundcloud.extractors;
 
+import static org.schabi.newpipe.extractor.services.soundcloud.linkHandler.SoundcloudSearchQueryHandlerFactory.ITEMS_PER_PAGE;
+import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonObject;
 import com.grack.nanojson.JsonParser;
@@ -9,17 +12,16 @@ import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.InfoItemExtractor;
 import org.schabi.newpipe.extractor.InfoItemsCollector;
 import org.schabi.newpipe.extractor.MetaInfo;
+import org.schabi.newpipe.extractor.MultiInfoItemsCollector;
 import org.schabi.newpipe.extractor.Page;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.downloader.Downloader;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.linkhandler.SearchQueryHandler;
-import org.schabi.newpipe.extractor.MultiInfoItemsCollector;
 import org.schabi.newpipe.extractor.search.SearchExtractor;
 import org.schabi.newpipe.extractor.utils.Parser;
 
-import javax.annotation.Nonnull;
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.net.MalformedURLException;
@@ -28,9 +30,7 @@ import java.util.Collections;
 import java.util.List;
 import java.util.function.IntUnaryOperator;
 
-import static org.schabi.newpipe.extractor.services.soundcloud.linkHandler.SoundcloudSearchQueryHandlerFactory.ITEMS_PER_PAGE;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
+import javax.annotation.Nonnull;
 
 public class SoundcloudSearchExtractor extends SearchExtractor {
     private JsonArray initialSearchCollection;
@@ -114,7 +114,7 @@ public class SoundcloudSearchExtractor extends SearchExtractor {
             }
 
             final JsonObject searchResult = (JsonObject) result;
-            final String kind = searchResult.getString("kind", EMPTY_STRING);
+            final String kind = searchResult.getString("kind", "");
             switch (kind) {
                 case "user":
                     collector.commit(new SoundcloudChannelInfoItemExtractor(searchResult));

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/extractors/SoundcloudStreamExtractor.java

@@ -4,7 +4,6 @@ import static org.schabi.newpipe.extractor.services.soundcloud.SoundcloudParsing
 import static org.schabi.newpipe.extractor.services.soundcloud.SoundcloudParsingHelper.clientId;
 import static org.schabi.newpipe.extractor.stream.AudioStream.UNKNOWN_BITRATE;
 import static org.schabi.newpipe.extractor.stream.Stream.ID_UNKNOWN;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 
@@ -58,7 +57,7 @@ public class SoundcloudStreamExtractor extends StreamExtractor {
             ExtractionException {
         track = SoundcloudParsingHelper.resolveFor(downloader, getUrl());
 
-        final String policy = track.getString("policy", EMPTY_STRING);
+        final String policy = track.getString("policy", "");
         if (!policy.equals("ALLOW") && !policy.equals("MONETIZE")) {
             isAvailable = false;
 
@@ -92,7 +91,7 @@ public class SoundcloudStreamExtractor extends StreamExtractor {
     public String getTextualUploadDate() {
         return track.getString("created_at")
                 .replace("T", " ")
-                .replace("Z", EMPTY_STRING);
+                .replace("Z", "");
     }
 
     @Nonnull
@@ -105,9 +104,9 @@ public class SoundcloudStreamExtractor extends StreamExtractor {
     @Nonnull
     @Override
     public String getThumbnailUrl() {
-        String artworkUrl = track.getString("artwork_url", EMPTY_STRING);
+        String artworkUrl = track.getString("artwork_url", "");
         if (artworkUrl.isEmpty()) {
-            artworkUrl = track.getObject("user").getString("avatar_url", EMPTY_STRING);
+            artworkUrl = track.getObject("user").getString("avatar_url", "");
         }
         return artworkUrl.replace("large.jpg", "crop.jpg");
     }

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/extractors/SoundcloudStreamInfoItemExtractor.java

@@ -1,6 +1,9 @@
 package org.schabi.newpipe.extractor.services.soundcloud.extractors;
 
+import static org.schabi.newpipe.extractor.utils.Utils.replaceHttpWithHttps;
+
 import com.grack.nanojson.JsonObject;
+
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.localization.DateWrapper;
 import org.schabi.newpipe.extractor.services.soundcloud.SoundcloudParsingHelper;
@@ -9,9 +12,6 @@ import org.schabi.newpipe.extractor.stream.StreamType;
 
 import javax.annotation.Nullable;
 
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-import static org.schabi.newpipe.extractor.utils.Utils.replaceHttpWithHttps;
-
 public class SoundcloudStreamInfoItemExtractor implements StreamInfoItemExtractor {
 
     protected final JsonObject itemObject;
@@ -73,7 +73,7 @@ public class SoundcloudStreamInfoItemExtractor implements StreamInfoItemExtracto
 
     @Override
     public String getThumbnailUrl() {
-        String artworkUrl = itemObject.getString("artwork_url", EMPTY_STRING);
+        String artworkUrl = itemObject.getString("artwork_url", "");
         if (artworkUrl.isEmpty()) {
             artworkUrl = itemObject.getObject("user").getString("avatar_url");
         }

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeParsingHelper.java

@@ -21,7 +21,6 @@
 package org.schabi.newpipe.extractor.services.youtube;
 
 import static org.schabi.newpipe.extractor.NewPipe.getDownloader;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.HTTP;
 import static org.schabi.newpipe.extractor.utils.Utils.HTTPS;
 import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
@@ -827,7 +826,7 @@ public final class YoutubeParsingHelper {
                         .value("hl", "en-GB")
                         .value("gl", "GB")
                         .array("experimentIds").end()
-                        .value("experimentsToken", EMPTY_STRING)
+                        .value("experimentsToken", "")
                         .object("locationInfo").end()
                         .object("musicAppInfo").end()
                     .end()
@@ -1397,10 +1396,10 @@ public final class YoutubeParsingHelper {
                                             @Nonnull final Response response) {
         final List<String> cookies = response.responseHeaders().get("set-cookie");
         if (cookies == null) {
-            return EMPTY_STRING;
+            return "";
         }
 
-        String result = EMPTY_STRING;
+        String result = "";
         for (final String cookie : cookies) {
             final int startIndex = cookie.indexOf(cookieName);
             if (startIndex != -1) {
@@ -1426,7 +1425,7 @@ public final class YoutubeParsingHelper {
         if (!isNullOrEmpty(alerts)) {
             final JsonObject alertRenderer = alerts.getObject(0).getObject("alertRenderer");
             final String alertText = getTextFromObject(alertRenderer.getObject("text"));
-            final String alertType = alertRenderer.getString("type", EMPTY_STRING);
+            final String alertType = alertRenderer.getString("type", "");
             if (alertType.equalsIgnoreCase("ERROR")) {
                 if (alertText != null && alertText.contains("This account has been terminated")) {
                     if (alertText.contains("violation") || alertText.contains("violating")

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/dashmanifestcreators/YoutubeOtfDashManifestCreator.java

@@ -1,18 +1,5 @@
 package org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators;
 
-import org.schabi.newpipe.extractor.downloader.Response;
-import org.schabi.newpipe.extractor.services.youtube.DeliveryType;
-import org.schabi.newpipe.extractor.services.youtube.ItagItem;
-import org.schabi.newpipe.extractor.utils.ManifestCreatorCache;
-import org.schabi.newpipe.extractor.utils.Utils;
-import org.w3c.dom.DOMException;
-import org.w3c.dom.Document;
-import org.w3c.dom.Element;
-
-import javax.annotation.Nonnull;
-import java.util.Arrays;
-import java.util.Objects;
-
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.ALR_YES;
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.RN_0;
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.SEGMENT_TIMELINE;
@@ -23,9 +10,22 @@ import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.generateSegmentTimelineElement;
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.getInitializationResponse;
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.setAttribute;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.isBlank;
 
+import org.schabi.newpipe.extractor.downloader.Response;
+import org.schabi.newpipe.extractor.services.youtube.DeliveryType;
+import org.schabi.newpipe.extractor.services.youtube.ItagItem;
+import org.schabi.newpipe.extractor.utils.ManifestCreatorCache;
+import org.schabi.newpipe.extractor.utils.Utils;
+import org.w3c.dom.DOMException;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import java.util.Arrays;
+import java.util.Objects;
+
+import javax.annotation.Nonnull;
+
 /**
  * Class which generates DASH manifests of YouTube {@link DeliveryType#OTF OTF streams}.
  */
@@ -112,8 +112,8 @@ public final class YoutubeOtfDashManifestCreator {
         // from video servers.
         final Response response = getInitializationResponse(realOtfBaseStreamingUrl,
                 itagItem, DeliveryType.OTF);
-        realOtfBaseStreamingUrl = response.latestUrl().replace(SQ_0, EMPTY_STRING)
-                .replace(RN_0, EMPTY_STRING).replace(ALR_YES, EMPTY_STRING);
+        realOtfBaseStreamingUrl = response.latestUrl().replace(SQ_0, "")
+                .replace(RN_0, "").replace(ALR_YES, "");
 
         final int responseCode = response.responseCode();
         if (responseCode != 200) {

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/dashmanifestcreators/YoutubePostLiveStreamDvrDashManifestCreator.java

@@ -1,18 +1,5 @@
 package org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators;
 
-import org.schabi.newpipe.extractor.downloader.Response;
-import org.schabi.newpipe.extractor.services.youtube.DeliveryType;
-import org.schabi.newpipe.extractor.services.youtube.ItagItem;
-import org.schabi.newpipe.extractor.utils.ManifestCreatorCache;
-import org.w3c.dom.DOMException;
-import org.w3c.dom.Document;
-import org.w3c.dom.Element;
-
-import javax.annotation.Nonnull;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
-
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.ALR_YES;
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.RN_0;
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.SEGMENT_TIMELINE;
@@ -23,9 +10,22 @@ import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.generateSegmentTimelineElement;
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.getInitializationResponse;
 import static org.schabi.newpipe.extractor.services.youtube.dashmanifestcreators.YoutubeDashManifestCreatorsUtils.setAttribute;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 
+import org.schabi.newpipe.extractor.downloader.Response;
+import org.schabi.newpipe.extractor.services.youtube.DeliveryType;
+import org.schabi.newpipe.extractor.services.youtube.ItagItem;
+import org.schabi.newpipe.extractor.utils.ManifestCreatorCache;
+import org.w3c.dom.DOMException;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+import javax.annotation.Nonnull;
+
 /**
  * Class which generates DASH manifests of YouTube post-live DVR streams (which use the
  * {@link DeliveryType#LIVE LIVE delivery type}).
@@ -130,8 +130,8 @@ public final class YoutubePostLiveStreamDvrDashManifestCreator {
             // from video servers.
             final Response response = getInitializationResponse(realPostLiveStreamDvrStreamingUrl,
                     itagItem, DeliveryType.LIVE);
-            realPostLiveStreamDvrStreamingUrl = response.latestUrl().replace(SQ_0, EMPTY_STRING)
-                    .replace(RN_0, EMPTY_STRING).replace(ALR_YES, EMPTY_STRING);
+            realPostLiveStreamDvrStreamingUrl = response.latestUrl().replace(SQ_0, "")
+                    .replace(RN_0, "").replace(ALR_YES, "");
 
             final int responseCode = response.responseCode();
             if (responseCode != 200) {

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeChannelExtractor.java

@@ -9,7 +9,6 @@ import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getValidJsonResponseBody;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareDesktopJsonBuilder;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 
@@ -120,10 +119,10 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
 
             final String webPageType = endpoint.getObject("commandMetadata")
                     .getObject("webCommandMetadata")
-                    .getString("webPageType", EMPTY_STRING);
+                    .getString("webPageType", "");
 
             final JsonObject browseEndpoint = endpoint.getObject("browseEndpoint");
-            final String browseId = browseEndpoint.getString("browseId", EMPTY_STRING);
+            final String browseId = browseEndpoint.getString("browseId", "");
 
             if (webPageType.equalsIgnoreCase("WEB_PAGE_TYPE_BROWSE")
                     || webPageType.equalsIgnoreCase("WEB_PAGE_TYPE_CHANNEL")
@@ -171,10 +170,10 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
 
             final String webPageType = endpoint.getObject("commandMetadata")
                     .getObject("webCommandMetadata")
-                    .getString("webPageType", EMPTY_STRING);
+                    .getString("webPageType", "");
 
             final String browseId = endpoint.getObject("browseEndpoint").getString("browseId",
-                    EMPTY_STRING);
+                    "");
 
             if (webPageType.equalsIgnoreCase("WEB_PAGE_TYPE_BROWSE")
                     || webPageType.equalsIgnoreCase("WEB_PAGE_TYPE_CHANNEL")
@@ -215,7 +214,7 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
     public String getId() throws ParsingException {
         final String channelId = initialData.getObject("header")
                 .getObject("c4TabbedHeaderRenderer")
-                .getString("channelId", EMPTY_STRING);
+                .getString("channelId", "");
 
         if (!channelId.isEmpty()) {
             return channelId;
@@ -456,7 +455,7 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
         for (final Object tab : tabs) {
             if (((JsonObject) tab).has("tabRenderer")) {
                 if (((JsonObject) tab).getObject("tabRenderer").getString("title",
-                        EMPTY_STRING).equals("Videos")) {
+                        "").equals("Videos")) {
                     foundVideoTab = ((JsonObject) tab).getObject("tabRenderer");
                     break;
                 }

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsInfoItemExtractor.java

@@ -1,7 +1,6 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonObject;
@@ -63,7 +62,7 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
         try {
             return getTextFromObject(JsonUtils.getObject(getCommentRenderer(), "authorText"));
         } catch (final Exception e) {
-            return EMPTY_STRING;
+            return "";
         }
     }
 
@@ -162,12 +161,12 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
         try {
             // If a comment has no likes voteCount is not set
             if (!getCommentRenderer().has("voteCount")) {
-                return EMPTY_STRING;
+                return "";
             }
 
             final JsonObject voteCountObj = JsonUtils.getObject(getCommentRenderer(), "voteCount");
             if (voteCountObj.isEmpty()) {
-                return EMPTY_STRING;
+                return "";
             }
             return getTextFromObject(voteCountObj);
         } catch (final Exception e) {
@@ -182,7 +181,7 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
             if (contentText.isEmpty()) {
                 // completely empty comments as described in
                 // https://github.com/TeamNewPipe/NewPipeExtractor/issues/380#issuecomment-668808584
-                return EMPTY_STRING;
+                return "";
             }
             final String commentText = getTextFromObject(contentText);
             // YouTube adds U+FEFF in some comments.
@@ -235,7 +234,7 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
         try {
             return getTextFromObject(JsonUtils.getObject(getCommentRenderer(), "authorText"));
         } catch (final Exception e) {
-            return EMPTY_STRING;
+            return "";
         }
     }
 
@@ -245,7 +244,7 @@ public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtract
             return "https://www.youtube.com/channel/" + JsonUtils.getString(getCommentRenderer(),
                     "authorEndpoint.browseEndpoint.browseId");
         } catch (final Exception e) {
-            return EMPTY_STRING;
+            return "";
         }
     }
 

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMixPlaylistExtractor.java

@@ -8,7 +8,6 @@ import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getKey;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getValidJsonResponseBody;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareDesktopJsonBuilder;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.getQueryValue;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 import static org.schabi.newpipe.extractor.utils.Utils.stringToURL;
@@ -144,7 +143,7 @@ public class YoutubeMixPlaylistExtractor extends PlaylistExtractor {
     @Override
     public String getUploaderUrl() {
         // YouTube mixes are auto-generated by YouTube
-        return EMPTY_STRING;
+        return "";
     }
 
     @Override
@@ -156,7 +155,7 @@ public class YoutubeMixPlaylistExtractor extends PlaylistExtractor {
     @Override
     public String getUploaderAvatarUrl() {
         // YouTube mixes are auto-generated by YouTube
-        return EMPTY_STRING;
+        return "";
     }
 
     @Override

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeMusicSearchExtractor.java

@@ -10,7 +10,6 @@ import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeS
 import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.MUSIC_PLAYLISTS;
 import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.MUSIC_SONGS;
 import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.MUSIC_VIDEOS;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 
@@ -97,7 +96,7 @@ public class YoutubeMusicSearchExtractor extends SearchExtractor {
                         .value("hl", "en-GB")
                         .value("gl", getExtractorContentCountry().getCountryCode())
                         .array("experimentIds").end()
-                        .value("experimentsToken", EMPTY_STRING)
+                        .value("experimentsToken", "")
                         .object("locationInfo").end()
                         .object("musicAppInfo").end()
                     .end()
@@ -288,7 +287,7 @@ public class YoutubeMusicSearchExtractor extends SearchExtractor {
                     .getObject("musicResponsiveListItemRenderer", null);
             if (info != null) {
                 final String displayPolicy = info.getString("musicItemRendererDisplayPolicy",
-                        EMPTY_STRING);
+                        "");
                 if (displayPolicy.equals("MUSIC_ITEM_RENDERER_DISPLAY_POLICY_GREY_OUT")) {
                     continue; // No info about video URL available
                 }
@@ -354,7 +353,7 @@ public class YoutubeMusicSearchExtractor extends SearchExtractor {
                                             ((JsonObject) item).getObject(
                                                     "menuNavigationItemRenderer");
                                     if (menuNavigationItemRenderer.getObject("icon")
-                                            .getString("iconType", EMPTY_STRING)
+                                            .getString("iconType", "")
                                             .equals("ARTIST")) {
                                         return getUrlFromNavigationEndpoint(
                                                 menuNavigationItemRenderer

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubePlaylistExtractor.java

@@ -11,7 +11,6 @@ import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getUrlFromNavigationEndpoint;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getValidJsonResponseBody;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareDesktopJsonBuilder;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 
 import com.grack.nanojson.JsonArray;
@@ -217,19 +216,19 @@ public class YoutubePlaylistExtractor extends PlaylistExtractor {
     @Nonnull
     @Override
     public String getSubChannelName() {
-        return EMPTY_STRING;
+        return "";
     }
 
     @Nonnull
     @Override
     public String getSubChannelUrl() {
-        return EMPTY_STRING;
+        return "";
     }
 
     @Nonnull
     @Override
     public String getSubChannelAvatarUrl() {
-        return EMPTY_STRING;
+        return "";
     }
 
     @Nonnull

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamExtractor.java

@@ -21,12 +21,12 @@
 package org.schabi.newpipe.extractor.services.youtube.extractors;
 
 import static org.schabi.newpipe.extractor.services.youtube.ItagItem.APPROX_DURATION_MS_UNKNOWN;
+import static org.schabi.newpipe.extractor.services.youtube.ItagItem.CONTENT_LENGTH_UNKNOWN;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.CONTENT_CHECK_OK;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.CPN;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.RACY_CHECK_OK;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.VIDEO_ID;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.createDesktopPlayerBody;
-import static org.schabi.newpipe.extractor.services.youtube.ItagItem.CONTENT_LENGTH_UNKNOWN;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.fixThumbnailUrl;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.generateContentPlaybackNonce;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.generateTParameter;
@@ -37,7 +37,6 @@ import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareAndroidMobileJsonBuilder;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareDesktopJsonBuilder;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareIosMobileJsonBuilder;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 
 import com.grack.nanojson.JsonArray;
@@ -185,18 +184,18 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     @Nullable
     @Override
     public String getTextualUploadDate() throws ParsingException {
-        if (!playerMicroFormatRenderer.getString("uploadDate", EMPTY_STRING).isEmpty()) {
+        if (!playerMicroFormatRenderer.getString("uploadDate", "").isEmpty()) {
             return playerMicroFormatRenderer.getString("uploadDate");
-        } else if (!playerMicroFormatRenderer.getString("publishDate", EMPTY_STRING).isEmpty()) {
+        } else if (!playerMicroFormatRenderer.getString("publishDate", "").isEmpty()) {
             return playerMicroFormatRenderer.getString("publishDate");
         }
 
         final JsonObject liveDetails = playerMicroFormatRenderer.getObject(
                 "liveBroadcastDetails");
-        if (!liveDetails.getString("endTimestamp", EMPTY_STRING).isEmpty()) {
+        if (!liveDetails.getString("endTimestamp", "").isEmpty()) {
             // an ended live stream
             return liveDetails.getString("endTimestamp");
-        } else if (!liveDetails.getString("startTimestamp", EMPTY_STRING).isEmpty()) {
+        } else if (!liveDetails.getString("startTimestamp", "").isEmpty()) {
             // a running live stream
             return liveDetails.getString("startTimestamp");
         } else if (getStreamType() == StreamType.LIVE_STREAM) {
@@ -331,7 +330,7 @@ public class YoutubeStreamExtractor extends StreamExtractor {
                         // Only JsonObjects allowed
                         .filter(JsonObject.class::isInstance)
                         .map(JsonObject.class::cast))
-                .map(run -> run.getString("text", EMPTY_STRING))
+                .map(run -> run.getString("text", ""))
                 .anyMatch(rowText -> rowText.contains("Age-restricted"));
 
         ageLimit = ageRestricted ? 18 : NO_AGE_LIMIT;
@@ -521,7 +520,7 @@ public class YoutubeStreamExtractor extends StreamExtractor {
                 throw new ParsingException("Could not get uploader avatar URL");
             }
 
-            return EMPTY_STRING;
+            return "";
         }
 
         return fixThumbnailUrl(url);
@@ -577,7 +576,7 @@ public class YoutubeStreamExtractor extends StreamExtractor {
                 .map(streamingDataObject -> streamingDataObject.getString(manifestKey))
                 .filter(Objects::nonNull)
                 .findFirst()
-                .orElse(EMPTY_STRING);
+                .orElse("");
     }
 
     @Override
@@ -791,7 +790,7 @@ public class YoutubeStreamExtractor extends StreamExtractor {
 
         final JsonObject playabilityStatus = playerResponse.getObject("playabilityStatus");
 
-        final boolean isAgeRestricted = playabilityStatus.getString("reason", EMPTY_STRING)
+        final boolean isAgeRestricted = playabilityStatus.getString("reason", "")
                 .contains("age");
 
         setStreamType();
@@ -1298,7 +1297,7 @@ public class YoutubeStreamExtractor extends StreamExtractor {
      *             <li>the height returned by the {@link ItagItem} + {@code p} + the frame rate if
      *             it is more than 30;</li>
      *             <li>the default resolution string from the {@link ItagItem};</li>
-     *             <li>an {@link Utils#EMPTY_STRING empty string}.</li>
+     *             <li>an empty string.</li>
      *         </ol>
      *     </li>
      *     <li>the {@link DeliveryMethod#DASH DASH delivery method}, for OTF streams, live streams
@@ -1327,7 +1326,7 @@ public class YoutubeStreamExtractor extends StreamExtractor {
 
             final String resolutionString = itagItem.getResolutionString();
             builder.setResolution(resolutionString != null ? resolutionString
-                    : EMPTY_STRING);
+                    : "");
 
             if (streamType != StreamType.VIDEO_STREAM || !itagInfo.getIsUrl()) {
                 // For YouTube videos on OTF streams and for all streams of post-live streams
@@ -1396,9 +1395,9 @@ public class YoutubeStreamExtractor extends StreamExtractor {
 
         final JsonObject initRange = formatData.getObject("initRange");
         final JsonObject indexRange = formatData.getObject("indexRange");
-        final String mimeType = formatData.getString("mimeType", EMPTY_STRING);
+        final String mimeType = formatData.getString("mimeType", "");
         final String codec = mimeType.contains("codecs")
-                ? mimeType.split("\"")[1] : EMPTY_STRING;
+                ? mimeType.split("\"")[1] : "";
 
         itagItem.setBitrate(formatData.getInt("bitrate"));
         itagItem.setWidth(formatData.getInt("width"));
@@ -1437,7 +1436,7 @@ public class YoutubeStreamExtractor extends StreamExtractor {
         final ItagInfo itagInfo = new ItagInfo(streamUrl, itagItem);
 
         if (streamType == StreamType.VIDEO_STREAM) {
-            itagInfo.setIsUrl(!formatData.getString("type", EMPTY_STRING)
+            itagInfo.setIsUrl(!formatData.getString("type", "")
                     .equalsIgnoreCase("FORMAT_STREAM_TYPE_OTF"));
         } else {
             // We are currently not able to generate DASH manifests for running
@@ -1523,7 +1522,7 @@ public class YoutubeStreamExtractor extends StreamExtractor {
     @Nonnull
     @Override
     public String getCategory() {
-        return playerMicroFormatRenderer.getString("category", EMPTY_STRING);
+        return playerMicroFormatRenderer.getString("category", "");
     }
 
     @Nonnull

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamInfoItemExtractor.java

@@ -3,7 +3,6 @@ package org.schabi.newpipe.extractor.services.youtube.extractors;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getThumbnailUrlFromInfoItem;
 import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getUrlFromNavigationEndpoint;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 
 import com.grack.nanojson.JsonArray;
@@ -71,8 +70,8 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
         for (final Object badge : badges) {
             final JsonObject badgeRenderer
                     = ((JsonObject) badge).getObject("metadataBadgeRenderer");
-            if (badgeRenderer.getString("style", EMPTY_STRING).equals("BADGE_STYLE_TYPE_LIVE_NOW")
-                    || badgeRenderer.getString("label", EMPTY_STRING).equals("LIVE NOW")) {
+            if (badgeRenderer.getString("style", "").equals("BADGE_STYLE_TYPE_LIVE_NOW")
+                    || badgeRenderer.getString("label", "").equals("LIVE NOW")) {
                 cachedStreamType = StreamType.LIVE_STREAM;
                 return cachedStreamType;
             }
@@ -81,7 +80,7 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
         for (final Object overlay : videoInfo.getArray("thumbnailOverlays")) {
             final String style = ((JsonObject) overlay)
                     .getObject("thumbnailOverlayTimeStatusRenderer")
-                    .getString("style", EMPTY_STRING);
+                    .getString("style", "");
             if (style.equalsIgnoreCase("LIVE")) {
                 cachedStreamType = StreamType.LIVE_STREAM;
                 return cachedStreamType;
@@ -287,7 +286,7 @@ public class YoutubeStreamInfoItemExtractor implements StreamInfoItemExtractor {
         final JsonArray badges = videoInfo.getArray("badges");
         for (final Object badge : badges) {
             if (((JsonObject) badge).getObject("metadataBadgeRenderer")
-                    .getString("label", EMPTY_STRING).equals("Premium")) {
+                    .getString("label", "").equals("Premium")) {
                 return true;
             }
         }

extractor/src/main/java/org/schabi/newpipe/extractor/stream/Description.java

@@ -3,14 +3,12 @@ package org.schabi.newpipe.extractor.stream;
 import java.io.Serializable;
 import java.util.Objects;
 
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
-
 public class Description implements Serializable {
 
     public static final int HTML = 1;
     public static final int MARKDOWN = 2;
     public static final int PLAIN_TEXT = 3;
-    public static final Description EMPTY_DESCRIPTION = new Description(EMPTY_STRING, PLAIN_TEXT);
+    public static final Description EMPTY_DESCRIPTION = new Description("", PLAIN_TEXT);
 
     private final String content;
     private final int type;

extractor/src/main/java/org/schabi/newpipe/extractor/stream/SubtitlesStream.java

@@ -3,12 +3,10 @@ package org.schabi.newpipe.extractor.stream;
 import org.schabi.newpipe.extractor.MediaFormat;
 import org.schabi.newpipe.extractor.services.youtube.ItagItem;
 
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
-
 import java.util.Locale;
 
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 
 public final class SubtitlesStream extends Stream {
     private final MediaFormat format;
@@ -198,7 +196,7 @@ public final class SubtitlesStream extends Stream {
 
             if (id == null) {
                 id = languageCode + (mediaFormat != null ? "." + mediaFormat.suffix
-                        : EMPTY_STRING);
+                        : "");
             }
 
             return new SubtitlesStream(id, content, isUrl, mediaFormat, deliveryMethod,

extractor/src/main/java/org/schabi/newpipe/extractor/utils/Utils.java

@@ -25,7 +25,6 @@ public final class Utils {
      */
     @Deprecated
     public static final String UTF_8 = "UTF-8";
-    public static final String EMPTY_STRING = "";
     private static final Pattern M_PATTERN = Pattern.compile("(https?)?://m\\.");
     private static final Pattern WWW_PATTERN = Pattern.compile("(https?)?://www\\.");
 

extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/search/YoutubeSearchQHTest.java

@@ -1,15 +1,14 @@
 package org.schabi.newpipe.extractor.services.youtube.search;
 
-import org.junit.jupiter.api.Test;
-
-import static java.util.Arrays.asList;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.schabi.newpipe.extractor.ServiceList.YouTube;
 import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.CHANNELS;
 import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.MUSIC_SONGS;
 import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.PLAYLISTS;
 import static org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory.VIDEOS;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
+import static java.util.Arrays.asList;
+
+import org.junit.jupiter.api.Test;
 
 public class YoutubeSearchQHTest {
 
@@ -21,37 +20,37 @@ public class YoutubeSearchQHTest {
         assertEquals("https://www.youtube.com/results?search_query=G%C3%BCl%C3%BCm", YouTube.getSearchQHFactory().fromQuery("Gülüm").getUrl());
         assertEquals("https://www.youtube.com/results?search_query=%3Fj%24%29H%C2%A7B", YouTube.getSearchQHFactory().fromQuery("?j$)H§B").getUrl());
 
-        assertEquals("https://music.youtube.com/search?q=asdf", YouTube.getSearchQHFactory().fromQuery("asdf", asList(new String[]{MUSIC_SONGS}), EMPTY_STRING).getUrl());
-        assertEquals("https://music.youtube.com/search?q=hans", YouTube.getSearchQHFactory().fromQuery("hans", asList(new String[]{MUSIC_SONGS}), EMPTY_STRING).getUrl());
-        assertEquals("https://music.youtube.com/search?q=Poifj%26jaijf", YouTube.getSearchQHFactory().fromQuery("Poifj&jaijf", asList(new String[]{MUSIC_SONGS}), EMPTY_STRING).getUrl());
-        assertEquals("https://music.youtube.com/search?q=G%C3%BCl%C3%BCm", YouTube.getSearchQHFactory().fromQuery("Gülüm", asList(new String[]{MUSIC_SONGS}), EMPTY_STRING).getUrl());
-        assertEquals("https://music.youtube.com/search?q=%3Fj%24%29H%C2%A7B", YouTube.getSearchQHFactory().fromQuery("?j$)H§B", asList(new String[]{MUSIC_SONGS}), EMPTY_STRING).getUrl());
+        assertEquals("https://music.youtube.com/search?q=asdf", YouTube.getSearchQHFactory().fromQuery("asdf", asList(new String[]{MUSIC_SONGS}), "").getUrl());
+        assertEquals("https://music.youtube.com/search?q=hans", YouTube.getSearchQHFactory().fromQuery("hans", asList(new String[]{MUSIC_SONGS}), "").getUrl());
+        assertEquals("https://music.youtube.com/search?q=Poifj%26jaijf", YouTube.getSearchQHFactory().fromQuery("Poifj&jaijf", asList(new String[]{MUSIC_SONGS}), "").getUrl());
+        assertEquals("https://music.youtube.com/search?q=G%C3%BCl%C3%BCm", YouTube.getSearchQHFactory().fromQuery("Gülüm", asList(new String[]{MUSIC_SONGS}), "").getUrl());
+        assertEquals("https://music.youtube.com/search?q=%3Fj%24%29H%C2%A7B", YouTube.getSearchQHFactory().fromQuery("?j$)H§B", asList(new String[]{MUSIC_SONGS}), "").getUrl());
     }
 
     @Test
     public void testGetContentFilter() throws Exception {
         assertEquals(VIDEOS, YouTube.getSearchQHFactory()
-                .fromQuery(EMPTY_STRING, asList(new String[]{VIDEOS}), EMPTY_STRING).getContentFilters().get(0));
+                .fromQuery("", asList(new String[]{VIDEOS}), "").getContentFilters().get(0));
         assertEquals(CHANNELS, YouTube.getSearchQHFactory()
-                .fromQuery("asdf", asList(new String[]{CHANNELS}), EMPTY_STRING).getContentFilters().get(0));
+                .fromQuery("asdf", asList(new String[]{CHANNELS}), "").getContentFilters().get(0));
 
         assertEquals(MUSIC_SONGS, YouTube.getSearchQHFactory()
-                .fromQuery("asdf", asList(new String[]{MUSIC_SONGS}), EMPTY_STRING).getContentFilters().get(0));
+                .fromQuery("asdf", asList(new String[]{MUSIC_SONGS}), "").getContentFilters().get(0));
     }
 
     @Test
     public void testWithContentfilter() throws Exception {
         assertEquals("https://www.youtube.com/results?search_query=asdf&sp=EgIQAQ%253D%253D", YouTube.getSearchQHFactory()
-                .fromQuery("asdf", asList(new String[]{VIDEOS}), EMPTY_STRING).getUrl());
+                .fromQuery("asdf", asList(new String[]{VIDEOS}), "").getUrl());
         assertEquals("https://www.youtube.com/results?search_query=asdf&sp=EgIQAg%253D%253D", YouTube.getSearchQHFactory()
-                .fromQuery("asdf", asList(new String[]{CHANNELS}), EMPTY_STRING).getUrl());
+                .fromQuery("asdf", asList(new String[]{CHANNELS}), "").getUrl());
         assertEquals("https://www.youtube.com/results?search_query=asdf&sp=EgIQAw%253D%253D", YouTube.getSearchQHFactory()
-                .fromQuery("asdf", asList(new String[]{PLAYLISTS}), EMPTY_STRING).getUrl());
+                .fromQuery("asdf", asList(new String[]{PLAYLISTS}), "").getUrl());
         assertEquals("https://www.youtube.com/results?search_query=asdf", YouTube.getSearchQHFactory()
-                .fromQuery("asdf", asList(new String[]{"fjiijie"}), EMPTY_STRING).getUrl());
+                .fromQuery("asdf", asList(new String[]{"fjiijie"}), "").getUrl());
 
         assertEquals("https://music.youtube.com/search?q=asdf", YouTube.getSearchQHFactory()
-                .fromQuery("asdf", asList(new String[]{MUSIC_SONGS}), EMPTY_STRING).getUrl());
+                .fromQuery("asdf", asList(new String[]{MUSIC_SONGS}), "").getUrl());
     }
 
     @Test

extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/stream/YoutubeStreamExtractorDefaultTest.java

@@ -24,7 +24,6 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.schabi.newpipe.extractor.ServiceList.YouTube;
-import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
 
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Disabled;
@@ -409,7 +408,7 @@ public class YoutubeStreamExtractorDefaultTest {
         @Override public long expectedDislikeCountAtLeast() { return -1; }
         @Override public List<MetaInfo> expectedMetaInfo() throws MalformedURLException {
             return Collections.singletonList(new MetaInfo(
-                    EMPTY_STRING,
+                    "",
                     new Description("Funk is a German public broadcast service.", Description.PLAIN_TEXT),
                     Collections.singletonList(new URL("https://de.wikipedia.org/wiki/Funk_(Medienangebot)?wprov=yicw1")),
                     Collections.singletonList("Wikipedia (German)")