Make PlaybackException be able to de-serialize subclasses

Otherwise, Player clients would not be able to benefit from
PlaybackException subclasses, like ExoPlaybackException.

PiperOrigin-RevId: 378873767

library/common/src/main/java/com/google/android/exoplayer2/PlaybackException.java

@@ -27,6 +27,7 @@ import com.google.android.exoplayer2.util.Util;
 import java.lang.annotation.Documented;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
+import java.lang.reflect.Field;
 
 /** Thrown when a non locally recoverable playback failure occurs. */
 public class PlaybackException extends Exception implements Bundleable {
@@ -340,6 +341,7 @@ public class PlaybackException extends Exception implements Bundleable {
   @IntDef(
       open = true,
       value = {
+        FIELD_STRING_CLASS_NAME,
         FIELD_INT_ERROR_CODE,
         FIELD_LONG_TIMESTAMP_MS,
         FIELD_STRING_MESSAGE,
@@ -348,11 +350,12 @@ public class PlaybackException extends Exception implements Bundleable {
       })
   protected @interface FieldNumber {}
 
-  private static final int FIELD_INT_ERROR_CODE = 0;
-  private static final int FIELD_LONG_TIMESTAMP_MS = 1;
-  private static final int FIELD_STRING_MESSAGE = 2;
-  private static final int FIELD_STRING_CAUSE_CLASS_NAME = 3;
-  private static final int FIELD_STRING_CAUSE_MESSAGE = 4;
+  private static final int FIELD_STRING_CLASS_NAME = 0;
+  private static final int FIELD_INT_ERROR_CODE = 1;
+  private static final int FIELD_LONG_TIMESTAMP_MS = 2;
+  private static final int FIELD_STRING_MESSAGE = 3;
+  private static final int FIELD_STRING_CAUSE_CLASS_NAME = 4;
+  private static final int FIELD_STRING_CAUSE_MESSAGE = 5;
 
   /**
    * Defines a minimum field id value for subclasses to use when implementing {@link #toBundle()}
@@ -364,12 +367,33 @@ public class PlaybackException extends Exception implements Bundleable {
   protected static final int FIELD_CUSTOM_ID_BASE = 1000;
 
   /** Object that can create a {@link PlaybackException} from a {@link Bundle}. */
-  public static final Creator<PlaybackException> CREATOR = PlaybackException::new;
+  @SuppressWarnings({"unchecked"})
+  public static final Creator<PlaybackException> CREATOR =
+      bundle -> {
+        String className = bundle.getString(keyForField(FIELD_STRING_CLASS_NAME));
+        if (className != null && !PlaybackException.class.getName().equals(className)) {
+          try {
+            Field creatorField = Class.forName(className).getField("CREATOR");
+            // It is ok to pass null to Field.get for static fields.
+            @SuppressWarnings("argument.type.incompatible")
+            Creator<PlaybackException> creator =
+                (Creator<PlaybackException>) creatorField.get(/* obj= */ null);
+            if (creator != null) {
+              return creator.fromBundle(bundle);
+            }
+          } catch (Throwable e) {
+            // Failed to create an instance using the creator from the class with the given name.
+            // Fall through and try to deserialize the PlaybackException fields only.
+          }
+        }
+        return new PlaybackException(bundle);
+      };
 
   @CallSuper
   @Override
   public Bundle toBundle() {
     Bundle bundle = new Bundle();
+    bundle.putString(keyForField(FIELD_STRING_CLASS_NAME), getClass().getName());
     bundle.putInt(keyForField(FIELD_INT_ERROR_CODE), errorCode);
     bundle.putLong(keyForField(FIELD_LONG_TIMESTAMP_MS), timestampMs);
     bundle.putString(keyForField(FIELD_STRING_MESSAGE), getMessage());

library/common/src/test/java/com/google/android/exoplayer2/ExoPlaybackExceptionTest.java

@@ -35,6 +35,14 @@ public class ExoPlaybackExceptionTest {
   }
 
   @Test
+  public void roundTripViaBundle_usingPlaybackExceptionCreator_yieldsEqualInstance() {
+    ExoPlaybackException before = ExoPlaybackException.createForRemote(/* message= */ "test");
+    ExoPlaybackException after =
+        (ExoPlaybackException) PlaybackException.CREATOR.fromBundle(before.toBundle());
+    assertThat(areExoPlaybackExceptionsEqual(before, after)).isTrue();
+  }
+
+  @Test
   public void roundTripViaBundle_ofExoPlaybackExceptionTypeRenderer_yieldsEqualInstance() {
     ExoPlaybackException before =
         ExoPlaybackException.createForRenderer(

library/common/src/test/java/com/google/android/exoplayer2/PlaybackExceptionTest.java

@@ -54,11 +54,13 @@ public class PlaybackExceptionTest {
             /* timestampMs= */ 1000);
 
     Bundle bundle = new Bundle();
-    bundle.putInt("0", 5001); // Error code
-    bundle.putLong("1", 1000); // Timestamp.
-    bundle.putString("2", "message");
-    bundle.putString("3", expectedCause.getClass().getName());
-    bundle.putString("4", "cause message");
+    // We purposefully omit the class name to test that PlaybackException fields are deserialized,
+    // even though it was not possible to create an instance using the class name in the bundle.
+    bundle.putInt("1", 5001); // Error code
+    bundle.putLong("2", 1000); // Timestamp.
+    bundle.putString("3", "message");
+    bundle.putString("4", expectedCause.getClass().getName());
+    bundle.putString("5", "cause message");
 
     assertPlaybackExceptionsAreEquivalent(
         expectedException, PlaybackException.CREATOR.fromBundle(bundle));
@@ -75,11 +77,12 @@ public class PlaybackExceptionTest {
             /* timestampMs= */ 2000);
 
     Bundle bundle = exception.toBundle();
-    assertThat(bundle.getInt("0")).isEqualTo(4002); // Error code.
-    assertThat(bundle.getLong("1")).isEqualTo(2000); // Timestamp.
-    assertThat(bundle.getString("2")).isEqualTo("message");
-    assertThat(bundle.getString("3")).isEqualTo(cause.getClass().getName());
-    assertThat(bundle.getString("4")).isEqualTo("cause message");
+    assertThat(bundle.getString("0")).isEqualTo(PlaybackException.class.getName());
+    assertThat(bundle.getInt("1")).isEqualTo(4002); // Error code.
+    assertThat(bundle.getLong("2")).isEqualTo(2000); // Timestamp.
+    assertThat(bundle.getString("3")).isEqualTo("message");
+    assertThat(bundle.getString("4")).isEqualTo(cause.getClass().getName());
+    assertThat(bundle.getString("5")).isEqualTo("cause message");
   }
 
   @Test
@@ -93,11 +96,11 @@ public class PlaybackExceptionTest {
             /* timestampMs= */ 1000);
 
     Bundle bundle = new Bundle();
-    bundle.putInt("0", 5001); // Error code
-    bundle.putLong("1", 1000); // Timestamp.
-    bundle.putString("2", "message");
-    bundle.putString("3", "invalid cause class name");
-    bundle.putString("4", "cause message");
+    bundle.putInt("1", 5001); // Error code
+    bundle.putLong("2", 1000); // Timestamp.
+    bundle.putString("3", "message");
+    bundle.putString("4", "invalid cause class name");
+    bundle.putString("5", "cause message");
 
     assertPlaybackExceptionsAreEquivalent(
         expectedException, PlaybackException.CREATOR.fromBundle(bundle));