bool ArcmapDataBase::checkLayerTopology(dan::Object<iDataPlugin::IPGLayer> layer, const dan::DString &featureDatasetname, const dan::DString &topologyName, const dan::DString &topologyRuleName)
{
  /*
  参数含义：layer :需要进行拓扑检查的图层  featureDatasetname :所需创建的要素数据集名称 topologyName: 表示新建的拓扑名称 topologyRuleName ：表示创建拓扑规则的名称;
  */
  /*
  拓扑检查步骤：
  1. 新建要素数据集
  2. 导入要素类（单个/多个）
  3. 新建拓扑
  4. 添加拓扑规则
  5. 验证拓扑
  6. 导入拓扑图层
  */
  //得到当前要素工作空间mdb
  IFeatureWorkspacePtr ipFeatureWorkspace = getWorkspace();  
  dan::Object<ArcmapLayer> aLayer = layer;
  //获取当前空间参照(get ISpatialReference)
  IFeatureClassPtr ipFeatureClass = aLayer->getFeatureClass();
  IGeoDatasetPtr ipGeoDataset = ipFeatureClass;
  ISpatialReferencePtr ipSpatialRefrence;
  ipGeoDataset->get_SpatialReference(&ipSpatialRefrence);  //得到空间参照SpatialReference

  //创建要素数据集---（1.判断要素类是否存在要素数据集--(1)存在便无需创建 (2)不存在时则需创建相应要素数据集
  IFeatureDatasetPtr ipFeatureDataset;
  ipFeatureClass->get_FeatureDataset(&ipFeatureDataset); //判断是否存在该数据集;
  if (ipFeatureDataset == nullptr)  
  {
    /*1. 创建要素数据集 */
    ipFeatureWorkspace->CreateFeatureDataset(_bstr_t((LPCTSTR)featureDatasetname.utf16()), ipSpatialRefrence, &ipFeatureDataset);    
    /*2. 导入要素类到要素数据集 */
    IDatasetContainerPtr ipDatasetContainer = ipFeatureDataset;
    IDatasetPtr ipInDataset = ipFeatureClass;      //ipFeatureClass为同一工作空间下的要素类;
    ipDatasetContainer->AddDataset(ipInDataset);
    /*3. 新建拓扑  */ 
    //相关变量定义
    ITopologyContainerPtr ipTopologyContainer = ipFeatureDataset; //将数据集存入iTopology--用于创建拓扑
    ITopologyPtr ipTopology; 
    double ipClusterTolerance;  //返回默认容差
    ipTopologyContainer->get_DefaultClusterTolerance(&ipClusterTolerance);
    ipTopologyContainer->CreateTopology(_bstr_t((LPCTSTR)topologyName.utf16()), ipClusterTolerance, -1, L"", &ipTopology);
    long featureId;
    dan::DString ipJoinLayerName = layer->layerName();
    IFeatureClassPtr ipJoinFeatureClass;
    ipFeatureWorkspace->OpenFeatureClass(_bstr_t((LPCTSTR)ipJoinLayerName.utf16()), &ipJoinFeatureClass);
    ipJoinFeatureClass->get_FeatureClassID(&featureId);
    IClassPtr ipClass = ipJoinFeatureClass;
    ipTopology->AddClass(ipClass,5, 1, 1, VARIANT_FALSE);  //添加参与拓扑的图层 
    /*3. 添加拓扑规则 */
    ITopologyRulePtr ipGapTopologyRule(CLSID_TopologyRule);  //空隙
    ipGapTopologyRule->put_OriginClassID(featureId);
    ipGapTopologyRule->put_TopologyRuleType(esriTRTAreaNoGaps);   //层内要素是否有空隙;
    ipGapTopologyRule->put_Name(_bstr_t((LPCTSTR)topologyRuleName.utf16())); //dstring转BSTR
    ipGapTopologyRule->put_AllOriginSubtypes(VARIANT_TRUE);
    ITopologyRuleContainerPtr ipTopologyRuleContainer = (ITopologyRuleContainerPtr)ipTopology;
    VARIANT_BOOL checkTopoRule;
    ipTopologyRuleContainer->get_CanAddRule(ipGapTopologyRule, &checkTopoRule);
    if (checkTopoRule == VARIANT_TRUE)
    {
      ipTopologyRuleContainer->AddRule(ipGapTopologyRule);  //添加拓扑规则;
    }
    else
    {
      return false;
    }
    /*4. 验证拓扑 */
    IGeoDatasetPtr ipCurGeoDataset = ipTopology;
    IEnvelopePtr ipEnvelope;
    ipCurGeoDataset->get_Extent(&ipEnvelope);
    IPolygonPtr ipPolygon(CLSID_Polygon);
    ISegmentCollectionPtr ipSegmentCollection = ipPolygon;
    ipSegmentCollection->SetRectangle(ipEnvelope);
    IPolygonPtr ipCurPolygon;
    ipTopology->get_DirtyArea(ipPolygon, &ipCurPolygon);
    if (ipCurPolygon != nullptr)
    {
      IEnvelopePtr ipAreaToValidate; 
      ipPolygon->get_Envelope(&ipAreaToValidate);
      IEnvelopePtr ipAreaEffectValidated;
      ipTopology->ValidateTopology(ipAreaToValidate, &ipAreaEffectValidated);
    }
        //验证规则是否实现
    if (ipSegmentCollection == nullptr)
    {
      return false;
    }
    else
    {
      return true;
    }
  }
  else
  {
    ITopologyContainerPtr ipTopologyContainer = ipFeatureDataset; //将数据集存入iTopology--用于创建拓扑
    ITopologyPtr ipTopology;
    double ipClusterTolerance;  //返回默认容差
    ipTopologyContainer->get_DefaultClusterTolerance(&ipClusterTolerance);
    ipTopologyContainer->CreateTopology(_bstr_t((LPCTSTR)topologyName.utf16()), ipClusterTolerance, -1, L"", &ipTopology);
    //添加参与拓扑的图层：
    long featureId;
    dan::DString ipJoinLayerName = layer->layerName();
    IFeatureClassPtr ipJoinFeatureClass;
    ipFeatureWorkspace->OpenFeatureClass(_bstr_t((LPCTSTR)ipJoinLayerName.utf16()), &ipJoinFeatureClass);
    ipJoinFeatureClass->get_FeatureClassID(&featureId);
    IClassPtr ipClass = ipJoinFeatureClass;
    ipTopology->AddClass(ipClass, 5, 1, 1, VARIANT_FALSE);  //添加参与拓扑的图层  
    /* 添加拓扑规则 */
    ITopologyRulePtr ipGapTopologyRule(CLSID_TopologyRule);
    ipGapTopologyRule->put_TopologyRuleType(esriTRTAreaNoGaps);   //层内要素不能有空隙
    ipGapTopologyRule->put_Name(_bstr_t((LPCTSTR)topologyRuleName.utf16())); //dstring转BSTR
    ipGapTopologyRule->put_OriginClassID(featureId);
    ipGapTopologyRule->put_AllOriginSubtypes(VARIANT_TRUE);
    ITopologyRuleContainerPtr ipTopologyRuleContainer = ipTopology;
    VARIANT_BOOL checkTopoRule;
    ipTopologyRuleContainer->get_CanAddRule(ipGapTopologyRule, &checkTopoRule);
    if (checkTopoRule == VARIANT_TRUE)                // 判断能否添加该规则
    {
      ipTopologyRuleContainer->AddRule(ipGapTopologyRule);  //添加拓扑规则;
    }
    else
    {
      return false;
    }
    /* 验证拓扑 */
    IGeoDatasetPtr ipCurGeoDataset = ipTopology;
    IEnvelopePtr ipEnvelope;
    ipCurGeoDataset->get_Extent(&ipEnvelope);
    IPolygonPtr ipPolygon(CLSID_Polygon);
    ISegmentCollectionPtr ipSegmentCollection = ipPolygon;
    ipSegmentCollection->SetRectangle(ipEnvelope);
    IPolygonPtr ipCurPolygon;
    ipTopology->get_DirtyArea(ipPolygon, &ipCurPolygon);
    if (ipCurPolygon != nullptr)
    {
      IEnvelopePtr ipAreaToValidate;
      ipPolygon->get_Envelope(&ipAreaToValidate);
      IEnvelopePtr ipAreaEffectValidated;
      ipTopology->ValidateTopology(ipAreaToValidate, &ipAreaEffectValidated);
    }
    //验证规则是否实现;
    if (ipSegmentCollection == nullptr)
    {
      return false;
    }
    else
    {
      return true;
    }
  }
  return false;

}