LCOV - code coverage report
Current view: top level - ogr/ogrsf_frmts/lvbag - ogrlvbagdatasource.cpp (source / functions) Hit Total Coverage
Test: gdal_filtered.info Lines: 78 82 95.1 %
Date: 2025-06-30 22:42:20 Functions: 6 6 100.0 %

          Line data    Source code
       1             : /******************************************************************************
       2             :  *
       3             :  * Project:  LV BAG Translator
       4             :  * Purpose:  Implements OGRLVBAGDataSource.
       5             :  * Author:   Laixer B.V., info at laixer dot com
       6             :  *
       7             :  ******************************************************************************
       8             :  * Copyright (c) 2020, Laixer B.V. <info at laixer dot com>
       9             :  *
      10             :  * SPDX-License-Identifier: MIT
      11             :  ****************************************************************************/
      12             : 
      13             : #include "ogr_lvbag.h"
      14             : #include "ogrsf_frmts.h"
      15             : #include "ogrunionlayer.h"
      16             : #include "ogrlayerpool.h"
      17             : 
      18             : #include <algorithm>
      19             : 
      20             : /************************************************************************/
      21             : /*                          OGRLVBAGDataSource()                        */
      22             : /************************************************************************/
      23             : 
      24         656 : OGRLVBAGDataSource::OGRLVBAGDataSource()
      25         656 :     : poPool{new OGRLayerPool{}}, papoLayers{OGRLVBAG::LayerVector{}}
      26             : {
      27             :     const int nMaxSimultaneouslyOpened =
      28         656 :         std::max(atoi(CPLGetConfigOption("OGR_LVBAG_MAX_OPENED", "100")), 1);
      29         656 :     if (poPool->GetMaxSimultaneouslyOpened() != nMaxSimultaneouslyOpened)
      30             :     {
      31           0 :         poPool.reset(new OGRLayerPool(nMaxSimultaneouslyOpened));
      32             :     }
      33         656 : }
      34             : 
      35             : /************************************************************************/
      36             : /*                                Open()                                */
      37             : /************************************************************************/
      38             : 
      39          29 : int OGRLVBAGDataSource::Open(const char *pszFilename, char **papszOpenOptionsIn)
      40             : {
      41             :     auto poLayer = std::unique_ptr<OGRLVBAGLayer>{
      42          58 :         new OGRLVBAGLayer{pszFilename, poPool.get(), papszOpenOptionsIn}};
      43          29 :     if (poLayer && !poLayer->TouchLayer())
      44             :     {
      45           0 :         return FALSE;
      46             :     }
      47             : 
      48          29 :     papoLayers.push_back({OGRLVBAG::LayerType::LYR_RAW, std::move(poLayer)});
      49             : 
      50          29 :     if ((static_cast<int>(papoLayers.size()) + 1) %
      51          29 :                 poPool->GetMaxSimultaneouslyOpened() ==
      52          29 :             0 &&
      53           0 :         poPool->GetSize() > 0)
      54             :     {
      55           0 :         TryCoalesceLayers();
      56             :     }
      57             : 
      58          29 :     return TRUE;
      59             : }
      60             : 
      61             : /************************************************************************/
      62             : /*                          TryCoalesceLayers()                         */
      63             : /************************************************************************/
      64             : 
      65         834 : void OGRLVBAGDataSource::TryCoalesceLayers()
      66             : {
      67         834 :     std::vector<int> paGroup = {};
      68         834 :     std::map<int, std::vector<int>> paMergeVector = {};
      69             : 
      70             :     // FUTURE: This can be optimized
      71             :     // Find similar layers by doing a triangular matrix
      72             :     // comparison across all layers currently enlisted.
      73        1044 :     for (size_t i = 0; i < papoLayers.size(); ++i)
      74             :     {
      75         420 :         std::vector<int> paVector = {};
      76         434 :         for (size_t j = 0; j < papoLayers.size(); ++j)
      77             :         {
      78         227 :             if (std::find(paGroup.cbegin(), paGroup.cend(),
      79         224 :                           static_cast<int>(j)) != paGroup.cend())
      80             :             {
      81           3 :                 continue;
      82             :             }
      83             : 
      84         221 :             OGRLayer *poLayerLHS = papoLayers[i].second.get();
      85         221 :             OGRLayer *poLayerRHS = papoLayers[j].second.get();
      86             : 
      87         221 :             if (j > i && EQUAL(poLayerLHS->GetName(), poLayerRHS->GetName()))
      88             :             {
      89           4 :                 if (poLayerLHS->GetGeomType() == poLayerRHS->GetGeomType() &&
      90           4 :                     poLayerLHS->GetLayerDefn()->IsSame(
      91           2 :                         poLayerRHS->GetLayerDefn()))
      92             :                 {
      93           2 :                     paVector.push_back(static_cast<int>(j));
      94           2 :                     paGroup.push_back(static_cast<int>(j));
      95             :                 }
      96             :             }
      97             :         }
      98         210 :         if (!paVector.empty())
      99             :         {
     100           2 :             paMergeVector.insert({static_cast<int>(i), paVector});
     101             :         }
     102             :     }
     103             : 
     104         834 :     if (paMergeVector.empty())
     105             :     {
     106         832 :         return;
     107             :     }
     108             : 
     109           4 :     for (const auto &mergeLayer : paMergeVector)
     110             :     {
     111           2 :         const int baseLayerIdx = mergeLayer.first;
     112           4 :         const std::vector<int> papoLayersIdx = mergeLayer.second;
     113             : 
     114           2 :         int nSrcLayers = static_cast<int>(papoLayersIdx.size()) + 1;
     115             :         OGRLayer **papoSrcLayers = static_cast<OGRLayer **>(
     116           2 :             CPLRealloc(nullptr, sizeof(OGRLayer *) * nSrcLayers));
     117             : 
     118           2 :         CPLAssert(papoLayers[baseLayerIdx].second);
     119             : 
     120           2 :         int idx = 0;
     121           2 :         papoSrcLayers[idx++] = papoLayers[baseLayerIdx].second.release();
     122           4 :         for (const auto &poLayerIdx : papoLayersIdx)
     123             :         {
     124           2 :             papoSrcLayers[idx++] = papoLayers[poLayerIdx].second.release();
     125             :         }
     126             : 
     127           2 :         OGRLayer *poBaseLayer = papoSrcLayers[0];
     128             : 
     129             :         auto poLayer = std::unique_ptr<OGRUnionLayer>{new OGRUnionLayer{
     130           2 :             poBaseLayer->GetName(), nSrcLayers, papoSrcLayers, TRUE}};
     131             : 
     132           2 :         OGRFeatureDefn *poBaseLayerDefn = poBaseLayer->GetLayerDefn();
     133             : 
     134           2 :         const int nFields = poBaseLayerDefn->GetFieldCount();
     135             :         OGRFieldDefn **papoFields = static_cast<OGRFieldDefn **>(
     136           2 :             CPLRealloc(nullptr, sizeof(OGRFieldDefn *) * nFields));
     137          34 :         for (int i = 0; i < nFields; ++i)
     138             :         {
     139          32 :             papoFields[i] = poBaseLayerDefn->GetFieldDefn(i);
     140             :         }
     141             : 
     142           2 :         const int nGeomFields = poBaseLayerDefn->GetGeomFieldCount();
     143             :         OGRUnionLayerGeomFieldDefn **papoGeomFields =
     144           4 :             static_cast<OGRUnionLayerGeomFieldDefn **>(CPLRealloc(
     145           2 :                 nullptr, sizeof(OGRUnionLayerGeomFieldDefn *) * nGeomFields));
     146           4 :         for (int i = 0; i < nGeomFields; ++i)
     147             :         {
     148           2 :             papoGeomFields[i] = new OGRUnionLayerGeomFieldDefn(
     149           2 :                 poBaseLayerDefn->GetGeomFieldDefn(i));
     150             :         }
     151             : 
     152           2 :         poLayer->SetFields(FIELD_FROM_FIRST_LAYER, nFields, papoFields,
     153             :                            nGeomFields, papoGeomFields);
     154             : 
     155           4 :         for (int i = 0; i < nGeomFields; ++i)
     156             :         {
     157           2 :             delete papoGeomFields[i];
     158             :         }
     159           2 :         CPLFree(papoGeomFields);
     160           2 :         CPLFree(papoFields);
     161             : 
     162           2 :         papoLayers.push_back({OGRLVBAG::LayerType::LYR_RAW,
     163           4 :                               OGRLayerUniquePtr{poLayer.release()}});
     164             :     }
     165             : 
     166             :     // Erase all released pointers
     167           2 :     auto it = papoLayers.begin();
     168           9 :     while (it != papoLayers.end())
     169             :     {
     170           7 :         if (!it->second)
     171             :         {
     172           4 :             it = papoLayers.erase(it);
     173             :         }
     174             :         else
     175             :         {
     176           3 :             ++it;
     177             :         }
     178             :     }
     179             : }
     180             : 
     181             : /************************************************************************/
     182             : /*                              GetLayer()                              */
     183             : /************************************************************************/
     184             : 
     185          96 : OGRLayer *OGRLVBAGDataSource::GetLayer(int iLayer)
     186             : {
     187          96 :     if (iLayer < 0 || iLayer >= GetLayerCount())
     188             :     {
     189           7 :         return nullptr;
     190             :     }
     191          89 :     return papoLayers[iLayer].second.get();
     192             : }
     193             : 
     194             : /************************************************************************/
     195             : /*                           GetLayerCount()                            */
     196             : /************************************************************************/
     197             : 
     198         834 : int OGRLVBAGDataSource::GetLayerCount()
     199             : {
     200         834 :     TryCoalesceLayers();
     201         834 :     return static_cast<int>(papoLayers.size());
     202             : }
     203             : 
     204             : /************************************************************************/
     205             : /*                           TestCapability()                           */
     206             : /************************************************************************/
     207             : 
     208          19 : int OGRLVBAGDataSource::TestCapability(const char * /* pszCap */)
     209             : {
     210          19 :     return FALSE;
     211             : }

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