fix iter : clear cache when moving to next table

Author: elebras1

examples/src/main/java/com/github/elebras1/flecs/examples/DirectFieldAccessExample.java

@@ -12,31 +12,19 @@ public static void main(String[] args) {
             world.component(Position.class);
             world.component(Velocity.class);
             world.component(Health.class);
+            
+            long tagEnemy = world.entity("Enemy");;
 
             // Create entities
             for (int i = 0; i < 3; i++) {
+                long uniqueTag = world.entity("UniqueTag_" + i);
                 world.obtainEntity(world.entity("Entity_" + i))
                     .set(new Position(i * 10.0f, i * 5.0f))
                     .set(new Velocity(1.0f + i, 0.5f + i))
-                    .set(new Health(100 - i * 10));
+                    .set(new Health(100 - i * 10)).add(tagEnemy).add(uniqueTag);
             }
 
-            try (Query query = world.query()
-                    .with(Position.class)
-                    .with(Velocity.class)
-                    .with(Health.class)
-                    .build()) {
-
-                System.out.println("Traditional access (with object allocation):");
-                query.iter(iter -> {
-                    Field<Position> positions = iter.field(Position.class, 0);
-                    Field<Health> healths = iter.field(Health.class, 2);
-                    for (int i = 0; i < iter.count(); i++) {
-                        Position pos = positions.get(i);
-                        Health health = healths.get(i);
-                        System.out.printf("  pos=(%.1f, %.1f) health=%d%n", pos.x(), pos.y(), health.value());
-                    }
-                });
+            try (Query query = world.query().with(Position.class).with(Velocity.class).with(Health.class).build()) {
 
                 System.out.println("\nDirect access (no allocation):");
                 query.iter(iter -> {
@@ -57,6 +45,17 @@ public static void main(String[] args) {
                     }
                 });
             }
+
+
+            try (Query query = world.query().with(tagEnemy).with(Health.class).build()) {
+                System.out.println("\nDirect access with tag:");
+                query.iter(iter -> {
+                    for (int i = 0; i < iter.count(); i++) {
+                        int health = iter.fieldInt(Health.class, 1, "value", i);
+                        System.out.println("health=" + health);
+                    }
+                });
+            }
         }
     }
 }

src/main/java/com/github/elebras1/flecs/Query.java

@@ -65,6 +65,7 @@ public void iter(IterCallback callback) {
         Iter it = new Iter(iter, this.world);
 
         while (flecs_h.ecs_iter_next(iter)) {
+            it.setNativeIter(iter);
             callback.accept(it);
         }
     }