Add type parameters for all TxCallback<T> usage.

Author: greenrobot-team

objectbox-java/src/main/java/io/objectbox/BoxStore.java

@@ -191,7 +191,7 @@ public static boolean isObjectBrowserAvailable() {
 
     private final int queryAttempts;
 
-    private final TxCallback failedReadTxAttemptCallback;
+    private final TxCallback<?> failedReadTxAttemptCallback;
 
     BoxStore(BoxStoreBuilder builder) {
         context = builder.context;
@@ -733,7 +733,6 @@ public <T> T callInReadTxWithRetry(Callable<T> callable, int attempts, int initi
                     cleanStaleReadTransactions();
                 }
                 if (failedReadTxAttemptCallback != null) {
-                    //noinspection unchecked
                     failedReadTxAttemptCallback.txFinished(null, new DbException(message + " \n" + diagnose, e));
                 }
                 try {
@@ -973,7 +972,7 @@ public <T> SubscriptionBuilder<Class<T>> subscribe(Class<T> forClass) {
     }
 
     @Internal
-    public Future internalScheduleThread(Runnable runnable) {
+    public Future<?> internalScheduleThread(Runnable runnable) {
         return threadPool.submit(runnable);
     }
 
@@ -993,7 +992,7 @@ public int internalQueryAttempts() {
     }
 
     @Internal
-    public TxCallback internalFailedReadTxAttemptCallback() {
+    public TxCallback<?> internalFailedReadTxAttemptCallback() {
         return failedReadTxAttemptCallback;
     }
 

objectbox-java/src/main/java/io/objectbox/BoxStoreBuilder.java

@@ -90,7 +90,7 @@ public class BoxStoreBuilder {
 
     int queryAttempts;
 
-    TxCallback failedReadTxAttemptCallback;
+    TxCallback<?> failedReadTxAttemptCallback;
 
     final List<EntityInfo<?>> entityInfoList = new ArrayList<>();
     private Factory<InputStream> initialDbFileFactory;
@@ -345,7 +345,7 @@ public BoxStoreBuilder queryAttempts(int queryAttempts) {
      * Useful for e.g. logging.
      */
     @Experimental
-    public BoxStoreBuilder failedReadTxAttemptCallback(TxCallback failedReadTxAttemptCallback) {
+    public BoxStoreBuilder failedReadTxAttemptCallback(TxCallback<?> failedReadTxAttemptCallback) {
         this.failedReadTxAttemptCallback = failedReadTxAttemptCallback;
         return this;
     }