Remove ActionFile serialization, which is no longer used

PiperOrigin-RevId: 242465135

library/core/src/main/java/com/google/android/exoplayer2/offline/ActionFile.java

@@ -19,7 +19,6 @@ import com.google.android.exoplayer2.offline.DownloadAction.UnsupportedActionExc
 import com.google.android.exoplayer2.util.AtomicFile;
 import com.google.android.exoplayer2.util.Util;
 import java.io.DataInputStream;
-import java.io.DataOutputStream;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
@@ -30,8 +29,7 @@ import java.util.ArrayList;
  */
 public final class ActionFile {
 
-  private static final String TAG = "ActionFile";
-  /* package */ static final int VERSION = 0;
+  private static final int VERSION = 0;
 
   private final AtomicFile atomicFile;
 
@@ -75,29 +73,6 @@ public final class ActionFile {
     }
   }
 
-  /**
-   * Stores {@link DownloadAction}s to file.
-   *
-   * @param downloadActions DownloadActions to store to file.
-   * @throws IOException If there is an error during storing.
-   */
-  public void store(DownloadAction... downloadActions) throws IOException {
-    DataOutputStream output = null;
-    try {
-      output = new DataOutputStream(atomicFile.startWrite());
-      output.writeInt(VERSION);
-      output.writeInt(downloadActions.length);
-      for (DownloadAction action : downloadActions) {
-        action.serializeToStream(output);
-      }
-      atomicFile.endWrite(output);
-      // Avoid calling close twice.
-      output = null;
-    } finally {
-      Util.closeQuietly(output);
-    }
-  }
-
   /** Returns whether the file or its backup exists. */
   public boolean exists() {
     return atomicFile.exists();

library/core/src/test/java/com/google/android/exoplayer2/offline/ActionFileTest.java

@@ -22,7 +22,6 @@ import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.testutil.TestUtil;
 import com.google.android.exoplayer2.util.Util;
-import java.io.DataOutputStream;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -38,22 +37,16 @@ import org.junit.runner.RunWith;
 public class ActionFileTest {
 
   private File tempFile;
-  private DownloadAction action1;
-  private DownloadAction action2;
+  private DownloadAction expectedAction1;
+  private DownloadAction expectedAction2;
 
   @Before
   public void setUp() throws Exception {
     tempFile = Util.createTempFile(ApplicationProvider.getApplicationContext(), "ExoPlayerTest");
-    action1 =
-        buildAction(
-            DownloadAction.TYPE_PROGRESSIVE,
-            Uri.parse("http://test1.uri"),
-            TestUtil.buildTestData(16));
-    action2 =
-        buildAction(
-            DownloadAction.TYPE_PROGRESSIVE,
-            Uri.parse("http://test2.uri"),
-            TestUtil.buildTestData(32));
+    expectedAction1 =
+        buildExpectedAction(Uri.parse("http://test1.uri"), TestUtil.buildTestData(16));
+    expectedAction2 =
+        buildExpectedAction(Uri.parse("http://test2.uri"), TestUtil.buildTestData(32));
   }
 
   @After
@@ -63,8 +56,9 @@ public class ActionFileTest {
 
   @Test
   public void testLoadNoDataThrowsIOException() throws Exception {
+    ActionFile actionFile = getActionFile("offline/action_file_no_data.exi");
     try {
-      loadActions(new Object[] {});
+      actionFile.load();
       Assert.fail();
     } catch (IOException e) {
       // Expected exception.
@@ -73,8 +67,9 @@ public class ActionFileTest {
 
   @Test
   public void testLoadIncompleteHeaderThrowsIOException() throws Exception {
+    ActionFile actionFile = getActionFile("offline/action_file_incomplete_header.exi");
     try {
-      loadActions(new Object[] {ActionFile.VERSION});
+      actionFile.load();
       Assert.fail();
     } catch (IOException e) {
       // Expected exception.
@@ -82,95 +77,59 @@ public class ActionFileTest {
   }
 
   @Test
-  public void testLoadCompleteHeaderZeroAction() throws Exception {
-    DownloadAction[] actions = loadActions(new Object[] {ActionFile.VERSION, 0});
+  public void testLoadZeroActions() throws Exception {
+    ActionFile actionFile = getActionFile("offline/action_file_zero_actions.exi");
+    DownloadAction[] actions = actionFile.load();
     assertThat(actions).isNotNull();
     assertThat(actions).hasLength(0);
   }
 
   @Test
-  public void testLoadAction() throws Exception {
-    DownloadAction[] actions =
-        loadActions(
-            new Object[] {
-              ActionFile.VERSION,
-              1, // Action count
-              action1
-            });
-    assertThat(actions).isNotNull();
+  public void testLoadOneAction() throws Exception {
+    ActionFile actionFile = getActionFile("offline/action_file_one_action.exi");
+    DownloadAction[] actions = actionFile.load();
     assertThat(actions).hasLength(1);
-    assertThat(actions[0]).isEqualTo(action1);
+    assertThat(actions[0]).isEqualTo(expectedAction1);
   }
 
   @Test
-  public void testLoadActions() throws Exception {
-    DownloadAction[] actions =
-        loadActions(
-            new Object[] {
-              ActionFile.VERSION,
-              2, // Action count
-              action1,
-              action2,
-            });
-    assertThat(actions).isNotNull();
+  public void testLoadTwoActions() throws Exception {
+    ActionFile actionFile = getActionFile("offline/action_file_two_actions.exi");
+    DownloadAction[] actions = actionFile.load();
     assertThat(actions).hasLength(2);
-    assertThat(actions[0]).isEqualTo(action1);
-    assertThat(actions[1]).isEqualTo(action2);
+    assertThat(actions[0]).isEqualTo(expectedAction1);
+    assertThat(actions[1]).isEqualTo(expectedAction2);
   }
 
   @Test
-  public void testLoadNotSupportedVersion() throws Exception {
+  public void testLoadUnsupportedVersion() throws Exception {
+    ActionFile actionFile = getActionFile("offline/action_file_unsupported_version.exi");
     try {
-      loadActions(
-          new Object[] {
-            ActionFile.VERSION + 1,
-            1, // Action count
-            action1,
-          });
+      actionFile.load();
       Assert.fail();
     } catch (IOException e) {
       // Expected exception.
     }
   }
 
-  @Test
-  public void testStoreAndLoadNoActions() throws Exception {
-    doTestSerializationRoundTrip();
-  }
-
-  @Test
-  public void testStoreAndLoadActions() throws Exception {
-    doTestSerializationRoundTrip(action1, action2);
-  }
-
-  private void doTestSerializationRoundTrip(DownloadAction... actions) throws IOException {
-    ActionFile actionFile = new ActionFile(tempFile);
-    actionFile.store(actions);
-    assertThat(actionFile.load()).isEqualTo(actions);
-  }
-
-  // TODO: Remove this method and add assets for invalid and legacy serialized action files.
-  private DownloadAction[] loadActions(Object[] values) throws IOException {
-    FileOutputStream fileOutputStream = new FileOutputStream(tempFile);
-    DataOutputStream dataOutputStream = new DataOutputStream(fileOutputStream);
-    try {
-      for (Object value : values) {
-        if (value instanceof Integer) {
-          dataOutputStream.writeInt((Integer) value);
-        } else if (value instanceof DownloadAction) {
-          ((DownloadAction) value).serializeToStream(dataOutputStream);
-        } else {
-          throw new IllegalArgumentException();
-        }
-      }
-    } finally {
-      dataOutputStream.close();
+  private ActionFile getActionFile(String fileName) throws IOException {
+    // Copy the test data from the asset to where the ActionFile expects it to be.
+    byte[] actionFileBytes =
+        TestUtil.getByteArray(ApplicationProvider.getApplicationContext(), fileName);
+    try (FileOutputStream output = new FileOutputStream(tempFile)) {
+      output.write(actionFileBytes);
     }
-    return new ActionFile(tempFile).load();
+    // Load the action file.
+    return new ActionFile(tempFile);
   }
 
-  private static DownloadAction buildAction(String type, Uri uri, byte[] data) {
+  private static DownloadAction buildExpectedAction(Uri uri, byte[] data) {
     return DownloadAction.createDownloadAction(
-        "id", type, uri, /* keys= */ Collections.emptyList(), /* customCacheKey= */ null, data);
+        /* id= */ uri.toString(),
+        DownloadAction.TYPE_PROGRESSIVE,
+        uri,
+        /* keys= */ Collections.emptyList(),
+        /* customCacheKey= */ null,
+        data);
   }
 }

library/core/src/test/java/com/google/android/exoplayer2/offline/DownloadIndexUtilTest.java

@@ -22,8 +22,10 @@ import android.net.Uri;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.database.ExoDatabaseProvider;
+import com.google.android.exoplayer2.testutil.TestUtil;
 import com.google.android.exoplayer2.util.Util;
 import java.io.File;
+import java.io.FileOutputStream;
 import java.io.IOException;
 import java.util.Arrays;
 import java.util.List;
@@ -110,39 +112,45 @@ public class DownloadIndexUtilTest {
 
   @Test
   public void upgradeActionFile_createsDownloadStates() throws IOException {
-    ActionFile actionFile = new ActionFile(tempFile);
-    StreamKey streamKey1 =
+    // Copy the test asset to a file.
+    byte[] actionFileBytes =
+        TestUtil.getByteArray(
+            ApplicationProvider.getApplicationContext(),
+            "offline/action_file_for_download_index_upgrade.exi");
+    try (FileOutputStream output = new FileOutputStream(tempFile)) {
+      output.write(actionFileBytes);
+    }
+
+    StreamKey expectedStreamKey1 =
         new StreamKey(/* periodIndex= */ 3, /* groupIndex= */ 4, /* trackIndex= */ 5);
-    StreamKey streamKey2 =
+    StreamKey expectedStreamKey2 =
         new StreamKey(/* periodIndex= */ 0, /* groupIndex= */ 1, /* trackIndex= */ 2);
-    DownloadAction action1 =
+    DownloadAction expectedAction1 =
         DownloadAction.createDownloadAction(
-            "id1",
+            "key123",
             TYPE_DASH,
             Uri.parse("https://www.test.com/download1"),
-            asList(streamKey1),
+            asList(expectedStreamKey1),
             /* customCacheKey= */ "key123",
             new byte[] {1, 2, 3, 4});
-    DownloadAction action2 =
+    DownloadAction expectedAction2 =
         DownloadAction.createDownloadAction(
-            "id2",
+            "key234",
             TYPE_DASH,
             Uri.parse("https://www.test.com/download2"),
-            asList(streamKey2),
+            asList(expectedStreamKey2),
             /* customCacheKey= */ "key234",
             new byte[] {5, 4, 3, 2, 1});
-    actionFile.store(action1, action2);
 
+    ActionFile actionFile = new ActionFile(tempFile);
     DownloadIndexUtil.upgradeActionFile(actionFile, downloadIndex, /* downloadIdProvider= */ null);
-
-    assertDownloadIndexContainsAction(action1, DownloadState.STATE_QUEUED);
-    assertDownloadIndexContainsAction(action2, DownloadState.STATE_QUEUED);
+    assertDownloadIndexContainsAction(expectedAction1, DownloadState.STATE_QUEUED);
+    assertDownloadIndexContainsAction(expectedAction2, DownloadState.STATE_QUEUED);
   }
 
   private void assertDownloadIndexContainsAction(DownloadAction action, int state)
       throws IOException {
     DownloadState downloadState = downloadIndex.getDownloadState(action.id);
-    assertThat(downloadState).isNotNull();
     assertThat(downloadState.type).isEqualTo(action.type);
     assertThat(downloadState.cacheKey).isEqualTo(action.customCacheKey);
     assertThat(downloadState.customMetadata).isEqualTo(action.data);