Extracted DownloaderFactory to new class

app/src/androidTest/java/de/test/antennapod/service/download/DownloadServiceTest.java

@@ -5,6 +5,7 @@ import androidx.annotation.Nullable;
 import androidx.test.InstrumentationRegistry;
 import androidx.test.runner.AndroidJUnit4;
 
+import de.danoeh.antennapod.core.service.download.DownloaderFactory;
 import org.awaitility.Awaitility;
 import org.awaitility.core.ConditionTimeoutException;
 import org.junit.After;
@@ -47,7 +48,7 @@ public class DownloadServiceTest {
     private Feed testFeed = null;
     private FeedMedia testMedia11 = null;
 
-    private DownloadService.DownloaderFactory origFactory = null;
+    private DownloaderFactory origFactory = null;
 
     @Before
     public void setUp() throws Exception {
@@ -106,7 +107,7 @@ public class DownloadServiceTest {
         });
     }
 
-    private static class StubDownloaderFactory implements DownloadService.DownloaderFactory {
+    private static class StubDownloaderFactory implements DownloaderFactory {
         private final long downloadTime;
 
         @NonNull

core/src/main/java/de/danoeh/antennapod/core/service/download/DefaultDownloaderFactory.java

@@ -0,0 +1,20 @@
+package de.danoeh.antennapod.core.service.download;
+
+import android.util.Log;
+import android.webkit.URLUtil;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+public class DefaultDownloaderFactory implements DownloaderFactory {
+    private static final String TAG = "DefaultDwnldrFactory";
+
+    @Nullable
+    @Override
+    public Downloader create(@NonNull DownloadRequest request) {
+        if (!URLUtil.isHttpUrl(request.getSource()) && !URLUtil.isHttpsUrl(request.getSource())) {
+            Log.e(TAG, "Could not find appropriate downloader for " + request.getSource());
+            return null;
+        }
+        return new HttpDownloader(request);
+    }
+}

core/src/main/java/de/danoeh/antennapod/core/service/download/DownloadService.java

@@ -12,8 +12,6 @@ import android.os.Handler;
 import android.os.IBinder;
 import android.text.TextUtils;
 import android.util.Log;
-import android.webkit.URLUtil;
-import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 import de.danoeh.antennapod.core.ClientConfig;
@@ -116,6 +114,7 @@ public class DownloadService extends Service {
     private ScheduledFuture<?> downloadPostFuture;
     private static final int SCHED_EX_POOL_SIZE = 1;
     private ScheduledThreadPoolExecutor schedExecutor;
+    private static DownloaderFactory downloaderFactory = new DefaultDownloaderFactory();
 
     private final IBinder mBinder = new LocalBinder();
 
@@ -397,7 +396,7 @@ public class DownloadService extends Service {
 
         writeFileUrl(request);
 
-        Downloader downloader = getDownloader(request);
+        Downloader downloader = downloaderFactory.create(request);
         if (downloader != null) {
             numberOfDownloads.incrementAndGet();
             // smaller rss feeds before bigger media files
@@ -414,26 +413,6 @@ public class DownloadService extends Service {
         queryDownloads();
     }
 
-    @VisibleForTesting
-    public interface DownloaderFactory {
-        @Nullable
-        Downloader create(@NonNull DownloadRequest request);
-    }
-
-    private static class DefaultDownloaderFactory implements DownloaderFactory {
-        @Nullable
-        @Override
-        public Downloader create(@NonNull DownloadRequest request) {
-            if (!URLUtil.isHttpUrl(request.getSource()) && !URLUtil.isHttpsUrl(request.getSource())) {
-                Log.e(TAG, "Could not find appropriate downloader for " + request.getSource());
-                return null;
-            }
-            return new HttpDownloader(request);
-        }
-    }
-
-    private static DownloaderFactory downloaderFactory = new DefaultDownloaderFactory();
-
     @VisibleForTesting
     public static DownloaderFactory getDownloaderFactory() {
         return downloaderFactory;
@@ -446,10 +425,6 @@ public class DownloadService extends Service {
         DownloadService.downloaderFactory = downloaderFactory;
     }
 
-    private Downloader getDownloader(@NonNull DownloadRequest request) {
-        return downloaderFactory.create(request);
-    }
-
     /**
      * Remove download from the DownloadRequester list and from the
      * DownloadService list.

core/src/main/java/de/danoeh/antennapod/core/service/download/DownloaderFactory.java

@@ -0,0 +1,9 @@
+package de.danoeh.antennapod.core.service.download;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+public interface DownloaderFactory {
+    @Nullable
+    Downloader create(@NonNull DownloadRequest request);
+}