仅贴出关键代码段

 let @H_404_5@observableBatch = [];
    for @H_404_5@(let @H_404_5@item in this@H_404_5@.facetFields@H_404_5@) {
        observableBatch.push(this@H_404_5@._searchService.filterTree(searchId,item).map(res => res.json()));
    }
    Observable.forkJoin(observableBatch).subscribe(res=> {
        for @H_404_5@(let @H_404_5@item of @H_404_5@res) {
            //需要遍历树数组结果集  
        }  });
}

异步请求队列获得结果集是个数组，所以需要循环处理结果集。@H_404_5@