How to use

cursor

method

in

io.yawp.repository.query.QueryBuilder

public QueryTransformer<F, T> cursor(String cursor) {
  query.cursor(cursor);
  return this;
}

private void configureQuery(int batchSize, QueryBuilder<?> q) {
  if (cursor != null) {
    q.cursor(cursor);
  }
  q.limit(batchSize);
}

private QueryBuilder<SinkMarker> prepareQuery() {
  QueryBuilder<SinkMarker> q = r.query(SinkMarker.class).from(sinkId).order("id").limit(BATCH_SIZE);
  if (cursor != null) {
    q.cursor(cursor);
  }
  return q;
}

  private List<? extends IdRef<?>> sinkIds() {
    QueryBuilder<?> q = r.query(sinkClazz).order("id").limit(BATCH_SIZE);
    if (cursor != null) {
      q.cursor(cursor);
    }
    List<? extends IdRef<?>> ids = q.ids();
    if (ids.size() < BATCH_SIZE) {
      cursor = null;
    } else {
      cursor = q.getCursor();
    }
    return ids;
  }
}

  private List<? extends IdRef<?>> sourceIds() {
    QueryBuilder<?> q = r.query(sourceClazz).order("id").limit(BATCH_SIZE);
    if (cursor != null) {
      q.cursor(cursor);
    }
    List<? extends IdRef<?>> ids = q.ids();
    if (ids.size() < BATCH_SIZE) {
      cursor = null;
    } else {
      cursor = q.getCursor();
    }
    return ids;
  }
}

  private List<? extends IdRef<?>> sinkMarkerIds() {
    QueryBuilder<?> q = r.query(SinkMarker.class).from(sinkId).order("id").limit(BATCH_SIZE);
    if (cursor != null) {
      q.cursor(cursor);
    }
    List<? extends IdRef<?>> ids = q.ids();
    if (ids.size() < BATCH_SIZE) {
      cursor = null;
    } else {
      cursor = q.getCursor();
    }
    return ids;
  }
}

public QueryBuilder<T> options(QueryOptions options) {
  if (options.getCondition() != null) {
    where(options.getCondition());
  }
  if (options.getPreOrders() != null) {
    preOrders.addAll(options.getPreOrders());
  }
  if (options.getPostOrders() != null) {
    postOrders.addAll(options.getPostOrders());
  }
  if (options.getLimit() != null) {
    limit(options.getLimit());
  }
  if (options.getCursor() != null) {
    cursor(options.getCursor());
  }
  return this;
}

@Test
public void testCursor() {
  saveManyBasicObjects(3);
  QueryBuilder<BasicObject> q = yawp(BasicObject.class).order("intValue", "desc").limit(1);
  List<BasicObject> objects1 = q.list();
  assertEquals(3, objects1.get(0).getIntValue());
  List<BasicObject> objects2 = q.list();
  assertEquals(2, objects2.get(0).getIntValue());
  List<BasicObject> objects3 = yawp(BasicObject.class).cursor(q.getCursor()).order("intValue", "desc").limit(1).list();
  assertEquals(1, objects3.get(0).getIntValue());
}