/**
* 获取阻隔的“层组”
*
* @return
* @throws Exception
* @throws IOException
*/
public GroupLayer getGroupLayer() throws Exception, IOException {
// 获取当前阻隔featureClass
IFeatureClass ifc = getFeatureClass();
GroupLayer ret = new GroupLayer();
ret.setExpanded(false);
// 设置层组的名称
ret.setName("阻隔");
FeatureLayer fl = new FeatureLayer();
fl.setName(getName());
fl.setFeatureClassByRef(ifc);
ret.add(fl);
return ret;
}