Line data    Source code

       1             : /******************************************************************************
       2             :  *
       3             :  * Project:  KML Translator
       4             :  * Purpose:  Implements OGRLIBKMLDriver
       5             :  * Author:   Brian Case, rush at winkey dot org
       6             :  *
       7             :  ******************************************************************************
       8             :  * Copyright (c) 2010, Brian Case
       9             :  *
      10             :  * Permission is hereby granted, free of charge, to any person obtaining a
      11             :  * copy of this software and associated documentation files (the "Software"),
      12             :  * to deal in the Software without restriction, including without limitation
      13             :  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      14             :  * and/or sell copies of the Software, and to permit persons to whom the
      15             :  * Software is furnished to do so, subject to the following conditions:
      16             :  *
      17             :  * The above copyright notice and this permission notice shall be included
      18             :  * in all copies or substantial portions of the Software.
      19             :  *
      20             :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
      21             :  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      22             :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
      23             :  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      24             :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      25             :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
      26             :  * DEALINGS IN THE SOFTWARE.
      27             :  *****************************************************************************/
      28             : 
      29             : #include "libkml_headers.h"
      30             : 
      31             : #include "ogr_libkml.h"
      32             : #include "ogrlibkmldrivercore.h"
      33             : #include "cpl_conv.h"
      34             : #include "cpl_error.h"
      35             : #include "cpl_multiproc.h"
      36             : 
      37             : using kmldom::KmlFactory;
      38             : 
      39             : static CPLMutex *hMutex = nullptr;
      40             : static KmlFactory *m_poKmlFactory = nullptr;
      41             : 
      42             : /******************************************************************************
      43             :  OGRLIBKMLDriverUnload()
      44             : ******************************************************************************/
      45             : 
      46          13 : static void OGRLIBKMLDriverUnload(GDALDriver * /* poDriver */)
      47             : {
      48          13 :     if (hMutex != nullptr)
      49          10 :         CPLDestroyMutex(hMutex);
      50          13 :     hMutex = nullptr;
      51          13 :     m_poKmlFactory = nullptr;
      52          13 : }
      53             : 
      54             : /******************************************************************************
      55             :  Open()
      56             : ******************************************************************************/
      57             : 
      58         234 : static GDALDataset *OGRLIBKMLDriverOpen(GDALOpenInfo *poOpenInfo)
      59             : {
      60         234 :     if (OGRLIBKMLDriverIdentify(poOpenInfo) == FALSE)
      61           0 :         return nullptr;
      62             : 
      63             :     {
      64         468 :         CPLMutexHolderD(&hMutex);
      65         234 :         if (m_poKmlFactory == nullptr)
      66          11 :             m_poKmlFactory = KmlFactory::GetFactory();
      67             :     }
      68             : 
      69         234 :     OGRLIBKMLDataSource *poDS = new OGRLIBKMLDataSource(m_poKmlFactory);
      70             : 
      71         234 :     if (!poDS->Open(poOpenInfo->pszFilename, poOpenInfo->eAccess == GA_Update))
      72             :     {
      73         156 :         delete poDS;
      74             : 
      75         156 :         poDS = nullptr;
      76             :     }
      77             : 
      78         234 :     return poDS;
      79             : }
      80             : 
      81             : /************************************************************************/
      82             : /*                               Create()                               */
      83             : /************************************************************************/
      84             : 
      85          67 : static GDALDataset *OGRLIBKMLDriverCreate(const char *pszName, int /* nBands */,
      86             :                                           int /* nXSize */, int /* nYSize */,
      87             :                                           GDALDataType /* eDT */,
      88             :                                           char **papszOptions)
      89             : {
      90          67 :     CPLAssert(nullptr != pszName);
      91          67 :     CPLDebug("LIBKML", "Attempt to create: %s", pszName);
      92             : 
      93             :     {
      94         134 :         CPLMutexHolderD(&hMutex);
      95          67 :         if (m_poKmlFactory == nullptr)
      96           1 :             m_poKmlFactory = KmlFactory::GetFactory();
      97             :     }
      98             : 
      99          67 :     OGRLIBKMLDataSource *poDS = new OGRLIBKMLDataSource(m_poKmlFactory);
     100             : 
     101          67 :     if (!poDS->Create(pszName, papszOptions))
     102             :     {
     103           1 :         delete poDS;
     104             : 
     105           1 :         poDS = nullptr;
     106             :     }
     107             : 
     108          67 :     return poDS;
     109             : }
     110             : 
     111             : /******************************************************************************
     112             :  DeleteDataSource()
     113             : 
     114             :  Note: This method recursively deletes an entire dir if the datasource is a dir
     115             :        and all the files are kml or kmz.
     116             : 
     117             : ******************************************************************************/
     118             : 
     119          67 : static CPLErr OGRLIBKMLDriverDelete(const char *pszName)
     120             : {
     121             :     /***** dir *****/
     122             :     VSIStatBufL sStatBuf;
     123          67 :     if (!VSIStatL(pszName, &sStatBuf) && VSI_ISDIR(sStatBuf.st_mode))
     124             :     {
     125          32 :         char **papszDirList = VSIReadDir(pszName);
     126          32 :         for (int iFile = 0;
     127          32 :              papszDirList != nullptr && papszDirList[iFile] != nullptr; iFile++)
     128             :         {
     129          32 :             if (CE_Failure == OGRLIBKMLDriverDelete(papszDirList[iFile]))
     130             :             {
     131          32 :                 CSLDestroy(papszDirList);
     132          32 :                 return CE_Failure;
     133             :             }
     134             :         }
     135           0 :         CSLDestroy(papszDirList);
     136             : 
     137           0 :         if (VSIRmdir(pszName) < 0)
     138             :         {
     139           0 :             return CE_Failure;
     140             :         }
     141             :     }
     142             : 
     143             :     /***** kml *****/
     144          35 :     else if (EQUAL(CPLGetExtension(pszName), "kml"))
     145             :     {
     146          35 :         if (VSIUnlink(pszName) < 0)
     147          32 :             return CE_Failure;
     148             :     }
     149             : 
     150             :     /***** kmz *****/
     151           0 :     else if (EQUAL(CPLGetExtension(pszName), "kmz"))
     152             :     {
     153           0 :         if (VSIUnlink(pszName) < 0)
     154           0 :             return CE_Failure;
     155             :     }
     156             : 
     157             :     /***** do not delete other types of files *****/
     158             :     else
     159             :     {
     160           0 :         return CE_Failure;
     161             :     }
     162             : 
     163             :     // TODO(schwehr): Isn't this redundant to the else case?
     164           3 :     return CE_None;
     165             : }
     166             : 
     167             : /******************************************************************************
     168             :  RegisterOGRLIBKML()
     169             : ******************************************************************************/
     170             : 
     171          17 : void RegisterOGRLIBKML()
     172             : {
     173          17 :     if (GDALGetDriverByName(DRIVER_NAME) != nullptr)
     174           0 :         return;
     175             : 
     176          17 :     GDALDriver *poDriver = new GDALDriver();
     177          17 :     OGRLIBKMLDriverSetCommonMetadata(poDriver);
     178             : 
     179          17 :     poDriver->pfnOpen = OGRLIBKMLDriverOpen;
     180          17 :     poDriver->pfnCreate = OGRLIBKMLDriverCreate;
     181          17 :     poDriver->pfnDelete = OGRLIBKMLDriverDelete;
     182          17 :     poDriver->pfnUnloadDriver = OGRLIBKMLDriverUnload;
     183             : 
     184          17 :     GetGDALDriverManager()->RegisterDriver(poDriver);
     185             : }