Fix bug and some re-structure

src/main/java/org/schabi/newpipe/extractor/ListExtractor.java

@@ -11,52 +11,46 @@ import java.util.List;
  */
 public abstract class ListExtractor extends Extractor {
 
-    /**
-     * Get a new ListExtractor with the given nextPageUrl set.
-     */
     public ListExtractor(StreamingService service, String url) {
         super(service, url);
     }
 
     @Nonnull
-    public abstract InfoItemsCollector getInfoItems() throws IOException, ExtractionException;
+    public abstract InfoItemsCollector<? extends InfoItem, ?> getInfoItems() throws IOException, ExtractionException;
-
     public abstract String getNextPageUrl() throws IOException, ExtractionException;
-
+    public abstract InfoItemPage<? extends InfoItem> getPage(final String nextPageUrl) throws IOException, ExtractionException;
-    public abstract InfoItemPage getPage(final String nextPageUrl) throws IOException, ExtractionException;
 
     public boolean hasNextPage() throws IOException, ExtractionException {
-        return getNextPageUrl() != null && !getNextPageUrl().isEmpty();
+        final String nextPageUrl = getNextPageUrl();
+        return nextPageUrl != null && !nextPageUrl.isEmpty();
     }
 
-
-
     /*//////////////////////////////////////////////////////////////////////////
     // Inner
     //////////////////////////////////////////////////////////////////////////*/
 
-    public static class InfoItemPage {
+    public static class InfoItemPage<T extends InfoItem> {
         /**
          * The current list of items to this result
          */
-        public final List<InfoItem> infoItemList;
+        private final List<T> itemsList;
 
         /**
          * Next url to fetch more items
          */
-        public final String nextPageUrl;
+        private final String nextPageUrl;
 
         /**
          * Errors that happened during the extraction
          */
-        public final List<Throwable> errors;
+        private final List<Throwable> errors;
 
-        public InfoItemPage(InfoItemsCollector collector, String nextPageUrl) {
+        public InfoItemPage(InfoItemsCollector<T, ?> collector, String nextPageUrl) {
             this(collector.getItemList(), nextPageUrl, collector.getErrors());
         }
 
-        public InfoItemPage(List<InfoItem> infoItemList, String nextPageUrl, List<Throwable> errors) {
+        public InfoItemPage(List<T> itemsList, String nextPageUrl, List<Throwable> errors) {
-            this.infoItemList = infoItemList;
+            this.itemsList = itemsList;
             this.nextPageUrl = nextPageUrl;
             this.errors = errors;
         }
@@ -65,8 +59,8 @@ public abstract class ListExtractor extends Extractor {
             return nextPageUrl != null && !nextPageUrl.isEmpty();
         }
 
-        public List<InfoItem> getItemsList() {
+        public List<T> getItemsList() {
-            return infoItemList;
+            return itemsList;
         }
 
         public String getNextPageUrl() {

src/main/java/org/schabi/newpipe/extractor/channel/ChannelExtractor.java

@@ -1,9 +1,12 @@
 package org.schabi.newpipe.extractor.channel;
 
 import edu.umd.cs.findbugs.annotations.NonNull;
-import org.schabi.newpipe.extractor.*;
+import org.schabi.newpipe.extractor.ListExtractor;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.UrlIdHandler;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 
 import javax.annotation.Nonnull;
@@ -43,12 +46,10 @@ public abstract class ChannelExtractor extends ListExtractor {
 
     @NonNull
     @Override
-    public InfoItemsCollector getInfoItems()
+    public abstract StreamInfoItemsCollector getInfoItems() throws IOException, ExtractionException;
-        throws IOException, ExtractionException {
+    @Override
-        return getStreams();
+    public abstract InfoItemPage<StreamInfoItem> getPage(String nextPageUrl) throws IOException, ExtractionException;
-    }
 
-    public abstract StreamInfoItemsCollector getStreams() throws IOException, ExtractionException;
     public abstract String getAvatarUrl() throws ParsingException;
     public abstract String getBannerUrl() throws ParsingException;
     public abstract String getFeedUrl() throws ParsingException;

src/main/java/org/schabi/newpipe/extractor/channel/ChannelInfo.java

@@ -5,7 +5,7 @@ import org.schabi.newpipe.extractor.ListInfo;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.utils.ExtractorHelper;
 
 import java.io.IOException;
@@ -37,7 +37,7 @@ public class ChannelInfo extends ListInfo {
     }
 
 
-    public static InfoItemPage getMoreItems(StreamingService service, String url, String pageUrl)
+    public static InfoItemPage<StreamInfoItem> getMoreItems(StreamingService service, String url, String pageUrl)
             throws IOException, ExtractionException {
         return service.getChannelExtractor(url).getPage(pageUrl);
     }

src/main/java/org/schabi/newpipe/extractor/kiosk/KioskExtractor.java

@@ -20,10 +20,13 @@ package org.schabi.newpipe.extractor.kiosk;
  * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+import edu.umd.cs.findbugs.annotations.NonNull;
 import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
+import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 
 import javax.annotation.Nonnull;
 import java.io.IOException;
@@ -40,6 +43,12 @@ public abstract class KioskExtractor extends ListExtractor {
         this.id = kioskId;
     }
 
+    @NonNull
+    @Override
+    public abstract StreamInfoItemsCollector getInfoItems() throws IOException, ExtractionException;
+    @Override
+    public abstract InfoItemPage<StreamInfoItem> getPage(String nextPageUrl) throws IOException, ExtractionException;
+
     /**
      * For certain Websites the content of a kiosk will be different depending
      * on the country you want to poen the website in. Therefore you should

src/main/java/org/schabi/newpipe/extractor/kiosk/KioskInfo.java

@@ -25,6 +25,7 @@ import org.schabi.newpipe.extractor.ListInfo;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.utils.ExtractorHelper;
 
 import java.io.IOException;
@@ -35,10 +36,10 @@ public class KioskInfo extends ListInfo {
         super(serviceId, id, url, name);
     }
 
-    public static ListExtractor.InfoItemPage getMoreItems(StreamingService service,
+    public static ListExtractor.InfoItemPage<StreamInfoItem> getMoreItems(StreamingService service,
-                                                             String url,
+                                                                          String url,
-                                                             String pageUrl,
+                                                                          String pageUrl,
-                                                             String contentCountry) throws IOException, ExtractionException {
+                                                                          String contentCountry) throws IOException, ExtractionException {
         KioskList kl = service.getKioskList();
         KioskExtractor extractor = kl.getExtractorByUrl(url, pageUrl);
         extractor.setContentCountry(contentCountry);

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

@@ -1,12 +1,12 @@
 package org.schabi.newpipe.extractor.playlist;
 
 import edu.umd.cs.findbugs.annotations.NonNull;
-import org.schabi.newpipe.extractor.InfoItemsCollector;
 import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.UrlIdHandler;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 
 import javax.annotation.Nonnull;
@@ -26,12 +26,10 @@ public abstract class PlaylistExtractor extends ListExtractor {
 
     @NonNull
     @Override
-    public InfoItemsCollector getInfoItems()
+    public abstract StreamInfoItemsCollector getInfoItems() throws IOException, ExtractionException;
-        throws IOException, ExtractionException {
+    @Override
-        return getStreams();
+    public abstract InfoItemPage<StreamInfoItem> getPage(String nextPageUrl) throws IOException, ExtractionException;
-    }
 
-    public abstract StreamInfoItemsCollector getStreams() throws IOException, ExtractionException;
     public abstract String getThumbnailUrl() throws ParsingException;
     public abstract String getBannerUrl() throws ParsingException;
 

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

@@ -5,6 +5,7 @@ import org.schabi.newpipe.extractor.ListInfo;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 
 import java.io.IOException;
 
@@ -16,7 +17,7 @@ public class PlaylistInfo extends ListInfo {
         super(serviceId, id, url, name);
     }
 
-    public static InfoItemPage getMoreItems(StreamingService service, String url, String pageUrl) throws IOException, ExtractionException {
+    public static InfoItemPage<StreamInfoItem> getMoreItems(StreamingService service, String url, String pageUrl) throws IOException, ExtractionException {
         return service.getPlaylistExtractor(url).getPage(pageUrl);
     }
 

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

@@ -8,6 +8,7 @@ import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.channel.ChannelExtractor;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 
 import javax.annotation.Nonnull;
@@ -89,7 +90,7 @@ public class SoundcloudChannelExtractor extends ChannelExtractor {
 
     @Nonnull
     @Override
-    public StreamInfoItemsCollector getStreams() throws ExtractionException {
+    public StreamInfoItemsCollector getInfoItems() throws ExtractionException {
         if(streamInfoItemsCollector == null) {
             computeNextPageAndGetStreams();
         }
@@ -120,14 +121,14 @@ public class SoundcloudChannelExtractor extends ChannelExtractor {
     }
 
     @Override
-    public InfoItemPage getPage(final String pageUrl) throws IOException, ExtractionException {
+    public InfoItemPage<StreamInfoItem> getPage(final String pageUrl) throws IOException, ExtractionException {
-        if (!hasNextPage()) {
+        if (pageUrl == null || pageUrl.isEmpty()) {
-            throw new ExtractionException("Channel doesn't have more streams");
+            throw new ExtractionException(new IllegalArgumentException("Page url is empty or null"));
         }
 
         StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
         String nextPageUrl = SoundcloudParsingHelper.getStreamsFromApiMinItems(15, collector, pageUrl);
 
-        return new InfoItemPage(collector, nextPageUrl);
+        return new InfoItemPage<>(collector, nextPageUrl);
     }
 }

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

@@ -1,19 +1,17 @@
 package org.schabi.newpipe.extractor.services.soundcloud;
 
-import java.io.IOException;
-import java.util.Arrays;
-import java.util.List;
-
-import org.schabi.newpipe.extractor.Collector;
 import org.schabi.newpipe.extractor.Downloader;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.UrlIdHandler;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.kiosk.KioskExtractor;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 
 import javax.annotation.Nonnull;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.List;
 
 public class SoundcloudChartsExtractor extends KioskExtractor {
 	private String url;
@@ -44,15 +42,15 @@ public class SoundcloudChartsExtractor extends KioskExtractor {
     }
 
     @Override
-    public InfoItemPage getPage(String pageUrl) throws IOException, ExtractionException {
+    public InfoItemPage<StreamInfoItem> getPage(String pageUrl) throws IOException, ExtractionException {
-        if (!hasNextPage()) {
+        if (pageUrl == null || pageUrl.isEmpty()) {
-            throw new ExtractionException("Chart doesn't have more streams");
+            throw new ExtractionException(new IllegalArgumentException("Page url is empty or null"));
         }
 
         StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
         String nextPageUrl = SoundcloudParsingHelper.getStreamsFromApi(collector, pageUrl, true);
 
-        return new InfoItemPage(collector, nextPageUrl);
+        return new InfoItemPage<>(collector, nextPageUrl);
     }
 
 

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

@@ -8,6 +8,7 @@ import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.playlist.PlaylistExtractor;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 
 import javax.annotation.Nonnull;
@@ -91,7 +92,7 @@ public class SoundcloudPlaylistExtractor extends PlaylistExtractor {
 
     @Nonnull
     @Override
-    public StreamInfoItemsCollector getStreams() throws IOException, ExtractionException {
+    public StreamInfoItemsCollector getInfoItems() throws IOException, ExtractionException {
         if(streamInfoItemsCollector == null) {
             computeStreamsAndNextPageUrl();
         }
@@ -119,14 +120,14 @@ public class SoundcloudPlaylistExtractor extends PlaylistExtractor {
     }
 
     @Override
-    public InfoItemPage getPage(String pageUrl) throws IOException, ExtractionException {
+    public InfoItemPage<StreamInfoItem> getPage(String pageUrl) throws IOException, ExtractionException {
-        if (!hasNextPage()) {
+        if (pageUrl == null || pageUrl.isEmpty()) {
-            throw new ExtractionException("Playlist doesn't have more streams");
+            throw new ExtractionException(new IllegalArgumentException("Page url is empty or null"));
         }
 
         StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
         String nextPageUrl = SoundcloudParsingHelper.getStreamsFromApiMinItems(15, collector, pageUrl);
 
-        return new InfoItemPage(collector, nextPageUrl);
+        return new InfoItemPage<>(collector, nextPageUrl);
     }
 }

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

@@ -13,7 +13,7 @@ import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.channel.ChannelExtractor;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
-import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 import org.schabi.newpipe.extractor.utils.Parser;
 import org.schabi.newpipe.extractor.utils.Utils;
@@ -150,7 +150,7 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
 
     @Nonnull
     @Override
-    public StreamInfoItemsCollector getStreams() throws ExtractionException {
+    public StreamInfoItemsCollector getInfoItems() throws ExtractionException {
         StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
         Element ul = doc.select("ul[id=\"browse-items-primary\"]").first();
         collectStreamsFrom(collector, ul);
@@ -158,29 +158,27 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
     }
 
     @Override
-    public InfoItemPage getPage(String pageUrl) throws IOException, ExtractionException {
+    public InfoItemPage<StreamInfoItem> getPage(String pageUrl) throws IOException, ExtractionException {
+        if (pageUrl == null || pageUrl.isEmpty()) {
+            throw new ExtractionException(new IllegalArgumentException("Page url is empty or null"));
+        }
+
+        // Unfortunately, we have to fetch the page even if we are only getting next streams,
+        // as they don't deliver enough information on their own (the channel name, for example).
+        fetchPage();
+
+        StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
+        JsonObject ajaxJson;
         try {
-
+            ajaxJson = JsonParser.object().from(NewPipe.getDownloader().download(pageUrl));
-            if (!hasNextPage()) {
-                throw new ExtractionException("Channel doesn't have more streams");
-            }
-
-            fetchPage();
-
-            StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
-
-            final JsonObject ajaxJson = JsonParser.object().from(
-                    NewPipe.getDownloader()
-                    .download(pageUrl));
-
-            final Document ajaxHtml = Jsoup.parse(ajaxJson.getString("content_html"));
-
-            collectStreamsFrom(collector, ajaxHtml.select("body").first());
-
-            return new InfoItemPage(collector, getNextPageUrlFromAjaxPage(ajaxJson, pageUrl));
         } catch (JsonParserException pe) {
             throw new ParsingException("Could not parse json data for next streams", pe);
         }
+
+        final Document ajaxHtml = Jsoup.parse(ajaxJson.getString("content_html"));
+        collectStreamsFrom(collector, ajaxHtml.select("body").first());
+
+        return new InfoItemPage<>(collector, getNextPageUrlFromAjaxPage(ajaxJson, pageUrl));
     }
 
     private String getNextPageUrlFromAjaxPage(final JsonObject ajaxJson, final String pageUrl)

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

@@ -12,8 +12,8 @@ import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.UrlIdHandler;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
-import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
 import org.schabi.newpipe.extractor.playlist.PlaylistExtractor;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 import org.schabi.newpipe.extractor.stream.StreamType;
 import org.schabi.newpipe.extractor.utils.Parser;
@@ -26,10 +26,6 @@ import java.io.IOException;
 public class YoutubePlaylistExtractor extends PlaylistExtractor {
 
     private Document doc;
-    /**
-     * It's lazily initialized (when getInfoItemPage is called)
-     */
-    private Document nextPageAjax;
 
     public YoutubePlaylistExtractor(StreamingService service, String url) {
         super(service, url);
@@ -39,8 +35,6 @@ public class YoutubePlaylistExtractor extends PlaylistExtractor {
     public void onFetchPage(@Nonnull Downloader downloader) throws IOException, ExtractionException {
         String pageContent = downloader.download(getCleanUrl());
         doc = Jsoup.parse(pageContent, getCleanUrl());
-
-        nextPageAjax = null;
     }
 
     @Override
@@ -135,7 +129,7 @@ public class YoutubePlaylistExtractor extends PlaylistExtractor {
 
     @Nonnull
     @Override
-    public StreamInfoItemsCollector getStreams() throws IOException, ExtractionException {
+    public StreamInfoItemsCollector getInfoItems() throws IOException, ExtractionException {
         StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
         Element tbody = doc.select("tbody[id=\"pl-load-more-destination\"]").first();
         collectStreamsFrom(collector, tbody);
@@ -143,28 +137,26 @@ public class YoutubePlaylistExtractor extends PlaylistExtractor {
     }
 
     @Override
-    public InfoItemPage getPage(final String pageUrl) throws IOException, ExtractionException {
+    public InfoItemPage<StreamInfoItem> getPage(final String pageUrl) throws IOException, ExtractionException {
+        if (pageUrl == null || pageUrl.isEmpty()) {
+            throw new ExtractionException(new IllegalArgumentException("Page url is empty or null"));
+        }
+
+        StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
+        JsonObject pageJson;
         try {
-            if (!hasNextPage()) {
+            pageJson = JsonParser.object().from(NewPipe.getDownloader().download(pageUrl));
-                throw new ExtractionException("Playlist doesn't have more streams");
-            }
-
-            StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
-            // setupNextStreamsAjax(NewPipe.getDownloader());
-            final JsonObject pageJson = JsonParser.object().from(NewPipe.getDownloader()
-                    .download(pageUrl));
-            final Document pageHtml = Jsoup.parse("<table><tbody id=\"pl-load-more-destination\">"
-                    + pageJson.getString("content_html")
-                    + "</tbody></table>", pageUrl);
-
-            collectStreamsFrom(collector, pageHtml.select("tbody[id=\"pl-load-more-destination\"]").first());
-
-
-
-            return new InfoItemPage(collector, getNextPageUrlFromAjax(pageJson, pageUrl));
         } catch (JsonParserException pe) {
             throw new ParsingException("Could not parse ajax json", pe);
         }
+
+        final Document pageHtml = Jsoup.parse("<table><tbody id=\"pl-load-more-destination\">"
+                + pageJson.getString("content_html")
+                + "</tbody></table>", pageUrl);
+
+        collectStreamsFrom(collector, pageHtml.select("tbody[id=\"pl-load-more-destination\"]").first());
+
+        return new InfoItemPage<>(collector, getNextPageUrlFromAjax(pageJson, pageUrl));
     }
 
     private String getNextPageUrlFromAjax(final JsonObject pageJson, final String pageUrl)

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

@@ -24,10 +24,14 @@ import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
 import org.jsoup.nodes.Element;
 import org.jsoup.select.Elements;
-import org.schabi.newpipe.extractor.*;
+import org.schabi.newpipe.extractor.Downloader;
+import org.schabi.newpipe.extractor.ListExtractor;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.UrlIdHandler;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
 import org.schabi.newpipe.extractor.kiosk.KioskExtractor;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
 
 import javax.annotation.Nonnull;
@@ -66,7 +70,7 @@ public class YoutubeTrendingExtractor extends KioskExtractor {
     }
 
     @Override
-    public ListExtractor.InfoItemPage getPage(String pageUrl) {
+    public ListExtractor.InfoItemPage<StreamInfoItem> getPage(String pageUrl) {
         return null;
     }
 

src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudChannelExtractorTest.java

@@ -6,6 +6,7 @@ import org.schabi.newpipe.Downloader;
 import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.channel.ChannelExtractor;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 
 import static org.junit.Assert.*;
 import static org.schabi.newpipe.extractor.ExtractorAsserts.assertIsSecureUrl;
@@ -49,18 +50,18 @@ public class SoundcloudChannelExtractorTest {
 
     @Test
     public void testGetStreams() throws Exception {
-        assertFalse("no streams are received", extractor.getStreams().getItemList().isEmpty());
+        assertFalse("no streams are received", extractor.getInfoItems().getItemList().isEmpty());
     }
 
     @Test
     public void testGetStreamsErrors() throws Exception {
-        assertTrue("errors during stream list extraction", extractor.getStreams().getErrors().isEmpty());
+        assertTrue("errors during stream list extraction", extractor.getInfoItems().getErrors().isEmpty());
     }
 
     @Test
     public void testHasMoreStreams() throws Exception {
         // Setup the streams
-        extractor.getStreams();
+        extractor.getInfoItems();
         assertTrue("don't have more streams", extractor.hasNextPage());
     }
 
@@ -77,10 +78,10 @@ public class SoundcloudChannelExtractorTest {
     @Test
     public void testGetPage() throws Exception {
         // Setup the streams
-        extractor.getStreams();
+        extractor.getInfoItems();
-        ListExtractor.InfoItemPage nextItemsResult = extractor.getPage(extractor.getNextPageUrl());
+        ListExtractor.InfoItemPage<StreamInfoItem> nextItemsResult = extractor.getPage(extractor.getNextPageUrl());
-        assertTrue("extractor didn't have next streams", !nextItemsResult.infoItemList.isEmpty());
+        assertTrue("extractor didn't have next streams", !nextItemsResult.getItemsList().isEmpty());
-        assertTrue("errors occurred during extraction of the next streams", nextItemsResult.errors.isEmpty());
+        assertTrue("errors occurred during extraction of the next streams", nextItemsResult.getErrors().isEmpty());
         assertTrue("extractor didn't have more streams after getInfoItemPage", extractor.hasNextPage());
     }
 

src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudChartsExtractorTest.java

@@ -80,9 +80,9 @@ public class SoundcloudChartsExtractorTest {
 
     @Test
     public void testGetNextPage() throws Exception {
-        extractor.getInfoItems();
+        extractor.getInfoItems().getItemList();
         assertFalse("extractor has next streams", extractor.getPage(extractor.getNextPageUrl()) == null
-                || extractor.getPage(extractor.getNextPageUrl()).infoItemList.isEmpty());
+                || extractor.getPage(extractor.getNextPageUrl()).getItemsList().isEmpty());
     }
 
     @Test

src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudPlaylistExtractorTest.java

@@ -69,25 +69,25 @@ public class SoundcloudPlaylistExtractorTest {
 
     @Test
     public void testGetStreams() throws Exception {
-        assertTrue("no streams are received", !extractor.getStreams().getItemList().isEmpty());
+        assertTrue("no streams are received", !extractor.getInfoItems().getItemList().isEmpty());
     }
 
     @Test
     public void testGetStreamsErrors() throws Exception {
-        assertTrue("errors during stream list extraction", extractor.getStreams().getErrors().isEmpty());
+        assertTrue("errors during stream list extraction", extractor.getInfoItems().getErrors().isEmpty());
     }
 
     @Test
     public void testHasMoreStreams() throws Exception {
         // Setup the streams
-        extractor.getStreams();
+        extractor.getInfoItems();
         assertTrue("extractor didn't have more streams", !extractor.hasNextPage());
     }
 
     @Test(expected = ExtractionException.class)
     public void testGetNextPageNonExistent() throws Exception {
         // Setup the streams
-        extractor.getStreams();
+        extractor.getInfoItems();
 
         // This playlist don't have more streams, it should throw an error
         extractor.getPage(extractor.getNextPageUrl());

src/test/java/org/schabi/newpipe/extractor/services/youtube/YoutubeChannelExtractorTest.java

@@ -6,6 +6,7 @@ import org.schabi.newpipe.Downloader;
 import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.channel.ChannelExtractor;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 
 import static org.junit.Assert.*;
 import static org.schabi.newpipe.extractor.ExtractorAsserts.assertEmptyErrors;
@@ -88,18 +89,18 @@ public class YoutubeChannelExtractorTest {
 
     @Test
     public void testGetStreams() throws Exception {
-        assertTrue("no streams are received", !extractor.getStreams().getItemList().isEmpty());
+        assertTrue("no streams are received", !extractor.getInfoItems().getItemList().isEmpty());
     }
 
     @Test
     public void testGetStreamsErrors() throws Exception {
-        assertEmptyErrors("errors during stream list extraction", extractor.getStreams().getErrors());
+        assertEmptyErrors("errors during stream list extraction", extractor.getInfoItems().getErrors());
     }
 
     @Test
     public void testHasMoreStreams() throws Exception {
         // Setup the streams
-        extractor.getStreams();
+        extractor.getInfoItems();
         assertTrue("don't have more streams", extractor.hasNextPage());
     }
 
@@ -116,10 +117,10 @@ public class YoutubeChannelExtractorTest {
     @Test
     public void testGetPage() throws Exception {
         // Setup the streams
-        extractor.getStreams();
+        extractor.getInfoItems();
-        ListExtractor.InfoItemPage nextItemsResult = extractor.getPage(extractor.getNextPageUrl());
+        ListExtractor.InfoItemPage<StreamInfoItem> nextItemsResult = extractor.getPage(extractor.getNextPageUrl());
-        assertTrue("extractor didn't have next streams", !nextItemsResult.infoItemList.isEmpty());
+        assertTrue("extractor didn't have next streams", !nextItemsResult.getItemsList().isEmpty());
-        assertEmptyErrors("errors occurred during extraction of the next streams", nextItemsResult.errors);
+        assertEmptyErrors("errors occurred during extraction of the next streams", nextItemsResult.getErrors());
         assertTrue("extractor didn't have more streams after getInfoItemPage", extractor.hasNextPage());
     }
 }

src/test/java/org/schabi/newpipe/extractor/services/youtube/YoutubePlaylistExtractorTest.java

@@ -81,7 +81,7 @@ public class YoutubePlaylistExtractorTest {
 
     @Test
     public void testGetStreams() throws Exception {
-        List<StreamInfoItem> streams = extractor.getStreams().getItemList();
+        List<StreamInfoItem> streams = extractor.getInfoItems().getItemList();
         assertFalse("no streams are received", streams.isEmpty());
         assertTrue(streams.size() > 60);
         assertFalse(streams.contains(null));
@@ -96,13 +96,13 @@ public class YoutubePlaylistExtractorTest {
 
     @Test
     public void testGetStreamsErrors() throws Exception {
-        assertEmptyErrors("errors during stream list extraction", extractor.getStreams().getErrors());
+        assertEmptyErrors("errors during stream list extraction", extractor.getInfoItems().getErrors());
     }
 
     @Test
     public void testHasMoreStreams() throws Exception {
         // Setup the streams
-        extractor.getStreams();
+        extractor.getInfoItems();
         assertTrue("extractor didn't have more streams", extractor.hasNextPage());
     }
 
@@ -110,10 +110,10 @@ public class YoutubePlaylistExtractorTest {
     @Test @Ignore
     public void testGetNextPage() throws Exception {
         // Setup the streams
-        extractor.getStreams();
+        extractor.getInfoItems();
-        ListExtractor.InfoItemPage infoItemPage = extractor.getPage(extractor.getNextPageUrl());
+        ListExtractor.InfoItemPage<StreamInfoItem> infoItemPage = extractor.getPage(extractor.getNextPageUrl());
-        assertTrue("extractor didn't have next streams", !infoItemPage.infoItemList.isEmpty());
+        assertTrue("extractor didn't have next streams", !infoItemPage.getItemsList().isEmpty());
-        assertEmptyErrors("errors occurred during extraction of the next streams", infoItemPage.errors);
+        assertEmptyErrors("errors occurred during extraction of the next streams", infoItemPage.getErrors());
         assertTrue("extractor didn't have more streams after getInfoItemPage", extractor.hasNextPage());
     }