Apply suggestions: improve switch and use EMPTY_STRING

Author: Stypox

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

@@ -18,6 +18,7 @@
 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;
@@ -34,7 +35,7 @@ public BandcampSearchExtractor(final StreamingService service,
     @NonNull
     @Override
     public String getSearchSuggestion() {
-        return "";
+        return Utils.EMPTY_STRING;
     }
 
     @Override
@@ -58,13 +59,9 @@ public InfoItemsPage<InfoItem> getPage(final Page page)
                     .flatMap(element -> element.getElementsByClass("itemtype").stream())
                     .map(Element::text)
                     .findFirst()
-                    .orElse("");
+                    .orElse(Utils.EMPTY_STRING);
 
             switch (type) {
-                default:
-                case "FAN":
-                    // don't display fan results
-                    break;
                 case "ARTIST":
                     collector.commit(new BandcampChannelInfoItemExtractor(searchResult));
                     break;
@@ -74,6 +71,9 @@ public InfoItemsPage<InfoItem> getPage(final Page page)
                 case "TRACK":
                     collector.commit(new BandcampSearchStreamInfoItemExtractor(searchResult, null));
                     break;
+                default:
+                    // don't display fan results ("FAN") or other things
+                    break;
             }
         }
 

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

@@ -119,7 +119,7 @@ public DateWrapper getUploadDate() throws ParsingException {
     @Override
     public String getThumbnailUrl() throws ParsingException {
         if (albumJson.isNull("art_id")) {
-            return "";
+            return Utils.EMPTY_STRING;
         } else {
             return getImageUrl(albumJson.getLong("art_id"), true);
         }
@@ -131,7 +131,7 @@ public String getUploaderAvatarUrl() {
         return document.getElementsByClass("band-photo").stream()
                 .map(element -> element.attr("src"))
                 .findFirst()
-                .orElse("");
+                .orElse(Utils.EMPTY_STRING);
     }
 
     @Nonnull