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/****************************************************************************** * * Project: GDAL/OGR Geography Network support (Geographic Network Model) * Purpose: GNM general public declarations. * Authors: Mikhail Gusev (gusevmihs at gmail dot com) * Dmitry Baryshnikov, polimax@mail.ru * ****************************************************************************** * Copyright (c) 2014, Mikhail Gusev * Copyright (c) 2014-2015, NextGIS * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. ****************************************************************************/ #ifndef GNM #define GNM #if defined(__cplusplus) && !defined(CPL_SUPRESS_CPLUSPLUS) #include "ogrsf_frmts.h" #endif #include "gnmgraph.h" // Direction of an edge. typedef int GNMDirection; // We use int values in order to save them to the // network data. // Network's metadata parameters names. #define GNM_MD_NAME "net_name" #define GNM_MD_DESCR "net_description" #define GNM_MD_SRS "net_srs" #define GNM_MD_VERSION "net_version" #define GNM_MD_RULE "net_rule" #define GNM_MD_FORMAT "FORMAT" #define GNM_MD_FETCHEDGES "fetch_edge" #define GNM_MD_FETCHVERTEX "fetch_vertex" #define GNM_MD_NUM_PATHS "num_paths" #define GNM_MD_EMITTER "emitter" // TODO: Constants for capabilities. // #define GNMCanChangeConnections "CanChangeConnections" typedef enum { /** Dijkstra shortest path */ GATDijkstraShortestPath = 1, /** KShortest Paths */ GATKShortestPath, /** Recursive Breadth-first search */ GATConnectedComponents } GNMGraphAlgorithmType; #if defined(__cplusplus) && !defined(CPL_SUPRESS_CPLUSPLUS) /** * General GNM class which represents a geography network of common format. * * @since GDAL 2.1 */ class CPL_DLL GNMNetwork : public GDALDataset { public: GNMNetwork(); ~GNMNetwork() override; // GDALDataset Interface const OGRSpatialReference *GetSpatialRef() const override; char **GetFileList(void) override; // GNMNetwork Interface /** * @brief Create network system layers * * Creates the connectivity (the "network path" of data) over the dataset * and returns the resulting network. * NOTE: This method does not create any connections among features * but creates the necessary set of fields, layers, etc. * NOTE: After the successful creation the passed dataset must not be * modified outside (but can be read as usual). * NOTE: For the common network format the creation is forbidden if the * passed dataset already has network system layers and OVERWRITE creation * option is FALSE. * * @param pszFilename - A path there the network folder (schema, etc.) will * be created. The folder (schema, etc.) name get * options. * @param papszOptions - create network options. The create options * specific for gnm driver. * @return CE_None on success */ virtual CPLErr Create(const char *pszFilename, char **papszOptions) = 0; /** * @brief Open a network * @param poOpenInfo GDALOpenInfo pointer * @return CE_None on success */ virtual CPLErr Open(GDALOpenInfo *poOpenInfo) = 0; /** * @brief Delete network. Delete all dependent layers * @return CE_None on success */ virtual CPLErr Delete() = 0; /** * @brief GetName - a network name. The value provided to create function * in GNM_MD_NAME key. While creation this value used to create the * folder or db schema name. But can be changed after creation. * @return Network name string */ virtual const char *GetName() const; /** * @brief GetVersion return the network version if applicable * @return version value */ virtual int GetVersion() const { return 0; } /** * @brief DisconnectAll method clears the network graph * @return CE_None on success */ virtual CPLErr DisconnectAll() = 0; /** * @brief GetFeatureByGlobalFID search all network layers for given feature * identificator. * @param nGFID feature identificator. * @return OGRFeature pointer or NULL. The pointer should be freed via * OGRFeature::DestroyFeature(). */ virtual OGRFeature *GetFeatureByGlobalFID(GNMGFID nGFID) = 0; /** * @brief Create path between start and end GFIDs. * @param nStartFID - start identificator * @param nEndFID - end identificator * @param eAlgorithm - The algorithm to get path * @param papszOptions - algorithm specific options * @return In memory OGRLayer pointer with features constituting * the shortest path (or paths). The caller have to free * the pointer via @see ReleaseResultSet(). */ virtual OGRLayer *GetPath(GNMGFID nStartFID, GNMGFID nEndFID, GNMGraphAlgorithmType eAlgorithm, char **papszOptions) = 0; /** Casts a handle to a pointer */ static inline GNMNetwork *FromHandle(GNMGenericNetworkH hNet) { return static_cast(hNet); } /** Casts a pointer to a handle */ static inline GNMGenericNetworkH ToHandle(GNMNetwork *poNetwork) { return static_cast(poNetwork); } protected: /** * @brief Check if network already exist * @param pszFilename - path to network (folder or database * @param papszOptions - create options * @return TRUE if exist and not overwrite or FALSE */ virtual int CheckNetworkExist(const char *pszFilename, char **papszOptions) = 0; protected: //! @cond Doxygen_Suppress CPLString m_soName{}; OGRSpatialReference m_oSRS{}; //! @endcond }; class GNMRule; class OGRGNMWrappedResultLayer; /** * GNM class which represents a geography network of generic format. * * @since GDAL 2.1 */ class CPL_DLL GNMGenericNetwork : public GNMNetwork { public: GNMGenericNetwork(); ~GNMGenericNetwork() override; // GDALDataset Interface int GetLayerCount() const override; OGRLayer *GetLayer(int) const override; OGRErr DeleteLayer(int) override; int TestCapability(const char *) const override; virtual OGRLayer *CopyLayer(OGRLayer *poSrcLayer, const char *pszNewName, char **papszOptions = nullptr) override; int CloseDependentDatasets() override; CPLErr FlushCache(bool bAtClosing) override; // GNMNetwork Interface virtual CPLErr Create(const char *pszFilename, char **papszOptions) override = 0; CPLErr Delete() override; int GetVersion() const override; /** * @brief GetNewGlobalFID increase the global ID counter. * @return New global feature ID. */ virtual GNMGFID GetNewGlobalFID(); /** * @brief Get the algorithm name * @param eAlgorithm GNM algorithm type * @param bShortName Indicator which name to return - short or long * @return String with algorithm name */ virtual CPLString GetAlgorithmName(GNMDirection eAlgorithm, bool bShortName); /** * @brief AddFeatureGlobalFID add the FID <-> Layer name link to fast access * features by global FID. * @param nFID - global FID * @param pszLayerName - layer name * @return CE_None on success */ virtual CPLErr AddFeatureGlobalFID(GNMGFID nFID, const char *pszLayerName); /** * @brief Connects two features via third feature (may be virtual, so the * identificator should be -1). The features may be at the same layer * or different layers. * @param nSrcFID - source feature identificator * @param nTgtFID - target feature identificator * @param nConFID - connection feature identificator (-1 for virtual * connection) * @param dfCost - cost moving from source to target (default 1) * @param dfInvCost - cost moving from target to source (default 1) * @param eDir - direction, may be source to target, target to source or * both. (default - both) * @return CE_None on success */ virtual CPLErr ConnectFeatures(GNMGFID nSrcFID, GNMGFID nTgtFID, GNMGFID nConFID = -1, double dfCost = 1, double dfInvCost = 1, GNMDirection eDir = GNM_EDGE_DIR_BOTH); /** * @brief Remove features connection * @param nSrcFID - source feature identificator * @param nTgtFID - target feature identificator * @param nConFID - connection feature identificator * @return CE_None on success */ virtual CPLErr DisconnectFeatures(GNMGFID nSrcFID, GNMGFID nTgtFID, GNMGFID nConFID); /** * @brief Find the corresponding identificator in graph (source, target, * connector) and remove such connections. * @param nFID - identificator to find. * @return CE_None on success */ virtual CPLErr DisconnectFeaturesWithId(GNMGFID nFID); /** * @brief Change connection attributes. Search the connection by source * feature identificator, target feature identificator and connection * identificator. * @param nSrcFID - source feature identificator * @param nTgtFID - target feature identificator * @param nConFID - connection feature identificator * @param dfCost - new cost moving from source to target * @param dfInvCost - new cost moving from target to source * @param eDir - new direction * @return CE_None on success */ virtual CPLErr ReconnectFeatures(GNMGFID nSrcFID, GNMGFID nTgtFID, GNMGFID nConFID, double dfCost = 1, double dfInvCost = 1, GNMDirection eDir = GNM_EDGE_DIR_BOTH); CPLErr DisconnectAll() override; OGRFeature *GetFeatureByGlobalFID(GNMGFID nFID) override; /** * @brief Create network rule * * Creates the rule in the network according to the special syntax. These * rules are declarative and make an effect for the network when they exist. * Each rule for layer can be created only if the corresponding layer * existed and removed when the layer is being deleted. * * Rules syntax for the common network format in GNM contains the key words * (words in capital letters or signs) and the modifiers which refers to the * network objects. All the following combinations are available: * * Notation: * layer1, layer2, layer3 - a layer names (the corresponding layers must be * exist; * field1 - a field name (field must be exist); * constant1 - any double constant; * string1 - any string; * * Rules describing which layer can be connected or not connected with each * other, and (optional) which layer must serve as a connector. By default * all connections are forbidden. But while network creation process the * rule to allow any connection added. During the connection process each * rule tested if this connection can be created. * * "ALLOW CONNECTS ANY" * "DENY CONNECTS ANY" * "DENY CONNECTS layer1 WITH layer2" * "ALLOW CONNECTS layer1 WITH layer2 VIA layer3" * * @param pszRuleStr Rule string which will parsed. If the parsing was * successful, the rule will start having effect immediately. * @return CE_None on success. */ virtual CPLErr CreateRule(const char *pszRuleStr); /** * @brief Delete all rules from network * @return CE_None on success. */ virtual CPLErr DeleteAllRules(); /** * @brief Delete the specified rule * @param pszRuleStr - the rule to delete * @return CE_None on success. */ virtual CPLErr DeleteRule(const char *pszRuleStr); /** * @brief Get the rule list * @return list of rule strings. The caller have to free the lis via * CPLDestroy. */ virtual char **GetRules() const; /** * @brief Attempts to build the network topology automatically * * The method simply gets point and line or multiline layers from the * papszLayerList and searches for each line which connects two points: * start and end, so it can be not so effective in performance when it is * called on huge networks. Note, when passing your tolerance value: this * value will depend of spatial reference system of the network, and * especially of its 0,0 position because dfTolerance is just divided by 2 * and added/subtracted to/from both sides of each line-feature end point * forming thus the square area around it. The first point-feature occurred * inside this area will be given as a start/end point for the current * connection. So it is also desirable that at least two layers are passed * in papszLayerList (one point and one line), and they are already * connected "visually" ("geometrically"). * * @param papszLayerList A list of layers to connect. The list should be * freed via CSLDestroy. * @param dfTolerance Snapping tolerance. * @param dfCost Direct cost. * @param dfInvCost Inverse cost. * @param eDir Direction. * @return CE_None on success */ virtual CPLErr ConnectPointsByLines(char **papszLayerList, double dfTolerance, double dfCost, double dfInvCost, GNMDirection eDir); /** * @brief Change the block state of edge or vertex * @param nFID Identificator * @param bIsBlock Block or unblock * @return CE_None on success */ virtual CPLErr ChangeBlockState(GNMGFID nFID, bool bIsBlock); /** * @brief Change all vertices and edges block state. * * This is mainly use for unblock all vertices and edges. * * @param bIsBlock Block or unblock * @return CE_None on success */ virtual CPLErr ChangeAllBlockState(bool bIsBlock = false); virtual OGRLayer *GetPath(GNMGFID nStartFID, GNMGFID nEndFID, GNMGraphAlgorithmType eAlgorithm, char **papszOptions) override; /** Casts a handle to a pointer */ static inline GNMGenericNetwork *FromHandle(GNMGenericNetworkH hNet) { return static_cast(hNet); } /** Casts a pointer to a handle */ static inline GNMGenericNetworkH ToHandle(GNMGenericNetwork *poNetwork) { return static_cast(poNetwork); } protected: /** * @brief Check or create layer OGR driver * @param pszDefaultDriverName - default driver name * @param papszOptions - create options * @return CE_None if driver is exist or CE_Failure */ virtual CPLErr CheckLayerDriver(const char *pszDefaultDriverName, char **papszOptions); /** * @brief Check if provided OGR driver accepted as storage for network data * @param pszDriverName The driver name * @return true if supported, else false */ virtual bool CheckStorageDriverSupport(const char *pszDriverName) = 0; protected: //! @cond Doxygen_Suppress virtual CPLErr CreateMetadataLayer(GDALDataset *const pDS, int nVersion, size_t nFieldSize = 1024); virtual CPLErr StoreNetworkSrs(); virtual CPLErr LoadNetworkSrs(); virtual CPLErr CreateGraphLayer(GDALDataset *const pDS); virtual CPLErr CreateFeaturesLayer(GDALDataset *const pDS); virtual CPLErr LoadMetadataLayer(GDALDataset *const pDS); virtual CPLErr LoadGraphLayer(GDALDataset *const pDS); virtual CPLErr LoadGraph(); virtual CPLErr LoadFeaturesLayer(GDALDataset *const pDS); virtual CPLErr DeleteMetadataLayer() = 0; virtual CPLErr DeleteGraphLayer() = 0; virtual CPLErr DeleteFeaturesLayer() = 0; virtual CPLErr LoadNetworkLayer(const char *pszLayername) = 0; virtual CPLErr DeleteNetworkLayers() = 0; virtual void ConnectPointsByMultiline( GIntBig nFID, const OGRMultiLineString *poMultiLineString, const std::vector &paPointLayers, double dfTolerance, double dfCost, double dfInvCost, GNMDirection eDir); virtual void ConnectPointsByLine(GIntBig nFID, const OGRLineString *poLineString, const std::vector &paPointLayers, double dfTolerance, double dfCost, double dfInvCost, GNMDirection eDir); virtual GNMGFID FindNearestPoint(const OGRPoint *poPoint, const std::vector &paPointLayers, double dfTolerance); virtual OGRFeature *FindConnection(GNMGFID nSrcFID, GNMGFID nTgtFID, GNMGFID nConFID); virtual bool SaveRules(); virtual GNMGFID GetNewVirtualFID(); virtual void FillResultLayer(OGRGNMWrappedResultLayer *poResLayer, const GNMPATH &path, int nNoOfPath, bool bReturnVertices, bool bReturnEdges); //! @endcond protected: //! @cond Doxygen_Suppress int m_nVersion = 0; GNMGFID m_nGID = 0; GNMGFID m_nVirtualConnectionGID = -1; OGRLayer *m_poMetadataLayer = nullptr; OGRLayer *m_poGraphLayer = nullptr; OGRLayer *m_poFeaturesLayer = nullptr; GDALDriver *m_poLayerDriver = nullptr; std::map m_moFeatureFIDMap{}; std::vector m_apoLayers{}; std::vector m_asRules; bool m_bIsRulesChanged = false; GNMGraph m_oGraph{}; bool m_bIsGraphLoaded = false; //! @endcond private: CPL_DISALLOW_COPY_ASSIGN(GNMGenericNetwork) }; /** * GNM layer which represents a geography network layer of generic format. * The class override some OGRLayer methods to fulfill the network requirements. * * @since GDAL 2.1 */ class GNMGenericLayer final : public OGRLayer { public: GNMGenericLayer(OGRLayer *poLayer, GNMGenericNetwork *poNetwork); ~GNMGenericLayer() override; // OGRLayer Interface OGRGeometry *GetSpatialFilter() override; virtual OGRErr ISetSpatialFilter(int iGeomField, const OGRGeometry *) override; OGRErr SetAttributeFilter(const char *) override; void ResetReading() override; OGRFeature *GetNextFeature() override; OGRErr SetNextByIndex(GIntBig nIndex) override; OGRErr DeleteFeature(GIntBig nFID) override; const char *GetName() const override; OGRwkbGeometryType GetGeomType() const override; const OGRFeatureDefn *GetLayerDefn() const override; virtual int FindFieldIndex(const char *pszFieldName, int bExactMatch) override; const OGRSpatialReference *GetSpatialRef() const override; GIntBig GetFeatureCount(int bForce = TRUE) override; virtual OGRErr IGetExtent(int iGeomField, OGREnvelope *psExtent, bool bForce = true) override; int TestCapability(const char *) const override; virtual OGRErr CreateField(const OGRFieldDefn *poField, int bApproxOK = TRUE) override; OGRErr DeleteField(int iField) override; OGRErr ReorderFields(int *panMap) override; virtual OGRErr AlterFieldDefn(int iField, OGRFieldDefn *poNewFieldDefn, int nFlagsIn) override; virtual OGRErr CreateGeomField(const OGRGeomFieldDefn *poField, int bApproxOK = TRUE) override; OGRErr SyncToDisk() override; OGRStyleTable *GetStyleTable() override; void SetStyleTableDirectly(OGRStyleTable *poStyleTable) override; void SetStyleTable(OGRStyleTable *poStyleTable) override; OGRErr StartTransaction() override; OGRErr CommitTransaction() override; OGRErr RollbackTransaction() override; const char *GetFIDColumn() const override; const char *GetGeometryColumn() const override; OGRErr SetIgnoredFields(CSLConstList papszFields) override; /** Intersection */ OGRErr Intersection(OGRLayer *pLayerMethod, OGRLayer *pLayerResult, char **papszOptions = nullptr, GDALProgressFunc pfnProgress = nullptr, void *pProgressArg = nullptr); /** Union */ OGRErr Union(OGRLayer *pLayerMethod, OGRLayer *pLayerResult, char **papszOptions = nullptr, GDALProgressFunc pfnProgress = nullptr, void *pProgressArg = nullptr); /** SymDifference */ OGRErr SymDifference(OGRLayer *pLayerMethod, OGRLayer *pLayerResult, char **papszOptions, GDALProgressFunc pfnProgress, void *pProgressArg); /** Identity */ OGRErr Identity(OGRLayer *pLayerMethod, OGRLayer *pLayerResult, char **papszOptions = nullptr, GDALProgressFunc pfnProgress = nullptr, void *pProgressArg = nullptr); /** Update */ OGRErr Update(OGRLayer *pLayerMethod, OGRLayer *pLayerResult, char **papszOptions = nullptr, GDALProgressFunc pfnProgress = nullptr, void *pProgressArg = nullptr); /** Clip */ OGRErr Clip(OGRLayer *pLayerMethod, OGRLayer *pLayerResult, char **papszOptions = nullptr, GDALProgressFunc pfnProgress = nullptr, void *pProgressArg = nullptr); /** Erase */ OGRErr Erase(OGRLayer *pLayerMethod, OGRLayer *pLayerResult, char **papszOptions = nullptr, GDALProgressFunc pfnProgress = nullptr, void *pProgressArg = nullptr); /** GetFeaturesRead */ GIntBig GetFeaturesRead(); /** AttributeFilterEvaluationNeedsGeometry */ int AttributeFilterEvaluationNeedsGeometry(); //! @cond Doxygen_Suppress /* consider these private */ OGRErr InitializeIndexSupport(const char *); OGRLayerAttrIndex *GetIndex(); //! @endcond protected: //! @cond Doxygen_Suppress OGRErr ISetFeature(OGRFeature *poFeature) override; OGRErr ICreateFeature(OGRFeature *poFeature) override; protected: CPLString m_soLayerName{}; OGRLayer *m_poLayer = nullptr; GNMGenericNetwork *m_poNetwork = nullptr; std::map m_mnFIDMap{}; //! @endcond private: CPL_DISALLOW_COPY_ASSIGN(GNMGenericLayer) }; typedef enum { /** Rule for connect features */ GRTConnection = 0 } GNMRuleType; /** * @brief The simple class for rules * * By now we have only connect rules, so the one class is enough. Maybe in * future the set of classes for different rule types will be needed. * * @since GDAL 2.1 */ class CPL_DLL GNMRule /* non final */ { public: /** Constructor */ GNMRule(); /** Constructor */ explicit GNMRule(const std::string &oRule); /** Constructor */ explicit GNMRule(const char *pszRule); /** Copy constructor */ GNMRule(const GNMRule &) = default; /** Move constructor */ GNMRule(GNMRule &&) = default; /** Assignment operator */ GNMRule &operator=(const GNMRule &) = default; /** Move assignment operator */ GNMRule &operator=(GNMRule &&) = default; /** Destructor */ virtual ~GNMRule(); /** * @brief This function indicate if rule string was parsed successfully * @return true if rule is valid */ virtual bool IsValid() const; /** * @brief Indicator of any layer state * @return true if accept any layer */ virtual bool IsAcceptAny() const; /** * @brief This is for future use to indicate the rule type/ Now return only * GRTConnection type. * @return the rule type */ virtual GNMRuleType GetType() const; /** * @brief Check if connection can take place. * @param soSrcLayerName - the layer name * @param soTgtLayerName - the layer name * @param soConnLayerName - the layer name * @return true if can connect features from soSrcLayerName and * soTgtLayerName via soConnLayerName */ virtual bool CanConnect(const CPLString &soSrcLayerName, const CPLString &soTgtLayerName, const CPLString &soConnLayerName = ""); /** Return source layer name */ virtual CPLString GetSourceLayerName() const; /** Return target layer name */ virtual CPLString GetTargetLayerName() const; /** Return connector layer name */ virtual CPLString GetConnectorLayerName() const; /** Return rule as a string */ const char *c_str() const; /** Return rule as a string */ operator const char *(void) const; protected: //! @cond Doxygen_Suppress virtual bool ParseRuleString(); protected: CPLString m_soSrcLayerName{}; CPLString m_soTgtLayerName{}; CPLString m_soConnLayerName{}; bool m_bAllow = false; bool m_bValid = false; bool m_bAny = false; CPLString m_soRuleString{}; //! @endcond }; /** * @brief The OGRGNMWrappedResultLayer class for search paths queries results. * * @since GDAL 2.1 */ class OGRGNMWrappedResultLayer final : public OGRLayer { public: OGRGNMWrappedResultLayer(GDALDataset *poDS, OGRLayer *poLayer); ~OGRGNMWrappedResultLayer() override; // OGRLayer void ResetReading() override; OGRFeature *GetNextFeature() override; OGRErr SetNextByIndex(GIntBig nIndex) override; OGRFeature *GetFeature(GIntBig nFID) override; const OGRFeatureDefn *GetLayerDefn() const override; GIntBig GetFeatureCount(int bForce = TRUE) override; int TestCapability(const char *pszCap) const override; virtual OGRErr CreateField(const OGRFieldDefn *poField, int bApproxOK = TRUE) override; virtual OGRErr CreateGeomField(const OGRGeomFieldDefn *poField, int bApproxOK = TRUE) override; const char *GetFIDColumn() const override; const char *GetGeometryColumn() const override; const OGRSpatialReference *GetSpatialRef() const override; // OGRGNMWrappedResultLayer OGRErr InsertFeature(OGRFeature *poFeature, const CPLString &soLayerName, int nPathNo, bool bIsEdge); protected: OGRErr ISetFeature(OGRFeature *poFeature) override; OGRErr ICreateFeature(OGRFeature *poFeature) override; protected: //! @cond Doxygen_Suppress GDALDataset *poDS = nullptr; OGRLayer *poLayer = nullptr; //! @endcond private: CPL_DISALLOW_COPY_ASSIGN(OGRGNMWrappedResultLayer) }; #endif // __cplusplus #endif // GNM