Add Box.count() with max count

Author: greenrobot

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

@@ -276,9 +276,18 @@ public Map<Long, T> getMap(Iterable<Long> ids) {
      * Returns the count of all stored objects in this box.
      */
     public long count() {
+        return count(0);
+    }
+
+    /**
+     * Returns the count of all stored objects in this box or the given maxCount, whichever is lower.
+     *
+     * @param maxCount maximum value to count or 0 (zero) to have no maximum limit
+     */
+    public long count(long maxCount) {
         Cursor<T> reader = getReader();
         try {
-            return reader.count();
+            return reader.count(maxCount);
         } finally {
             releaseReader(reader);
         }

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

@@ -58,7 +58,7 @@ public abstract class Cursor<T> implements Closeable {
 
     static native Object nativeFirstEntity(long cursor);
 
-    static native long nativeCount(long cursor);
+    static native long nativeCount(long cursor, long maxCountOrZero);
 
     static native List nativeFindScalarPropertyId(long cursor, int propertyId, long value);
 
@@ -215,8 +215,8 @@ public boolean seek(long key) {
         return nativeSeek(cursor, key);
     }
 
-    public long count() {
-        return nativeCount(cursor);
+    public long count(long maxCountOrZero) {
+        return nativeCount(cursor, maxCountOrZero);
     }
 
     @Override