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/******************************************************************************
* $Id: vfkfeaturesqlite.cpp 25721 2013-03-09 16:21:46Z martinl $
*
* Project: VFK Reader - Feature definition (SQLite)
* Purpose: Implements VFKFeatureSQLite class.
* Author: Martin Landa, landa.martin gmail.com
*
******************************************************************************
* Copyright (c) 2012-2013, Martin Landa <landa.martin gmail.com>
*
* 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.
****************************************************************************/
#include "vfkreader.h"
#include "vfkreaderp.h"
#include "cpl_conv.h"
#include "cpl_error.h"
/*!
\brief VFKFeatureSQLite constructor (from DB)
Read VFK feature from DB
\param poDataBlock pointer to related IVFKDataBlock
*/
VFKFeatureSQLite::VFKFeatureSQLite(IVFKDataBlock *poDataBlock) : IVFKFeature(poDataBlock)
{
m_hStmt = NULL;
m_iRowId = m_poDataBlock->GetFeatureCount() + 1; /* starts at 1 */
/* set FID from DB */
SetFIDFromDB(); /* -> m_nFID */
}
/*!
\brief VFKFeatureSQLite constructor
\param poDataBlock pointer to related IVFKDataBlock
\param iRowId feature DB rowid (starts at 1)
\param nFID feature id
*/
VFKFeatureSQLite::VFKFeatureSQLite(IVFKDataBlock *poDataBlock, int iRowId, long nFID) : IVFKFeature(poDataBlock)
{
m_hStmt = NULL;
m_iRowId = iRowId;
m_nFID = nFID;
}
/*!
\brief Read FID from DB
*/
OGRErr VFKFeatureSQLite::SetFIDFromDB()
{
CPLString osSQL;
osSQL.Printf("SELECT %s FROM %s WHERE rowid = %d",
FID_COLUMN, m_poDataBlock->GetName(), m_iRowId);
if (ExecuteSQL(osSQL.c_str()) != OGRERR_NONE)
return OGRERR_FAILURE;
m_nFID = sqlite3_column_int(m_hStmt, 0);
FinalizeSQL();
return OGRERR_NONE;
}
/*!
\brief Finalize SQL statement
*/
void VFKFeatureSQLite::FinalizeSQL()
{
sqlite3_finalize(m_hStmt);
m_hStmt = NULL;
}
/*!
\brief Execute SQL (select) statement
\param pszSQLCommand SQL command string
\return OGRERR_NONE on success or OGRERR_FAILURE on error
*/
OGRErr VFKFeatureSQLite::ExecuteSQL(const char *pszSQLCommand)
{
int rc;
sqlite3 *poDB;
VFKReaderSQLite *poReader = (VFKReaderSQLite *) m_poDataBlock->GetReader();
poDB = poReader->m_poDB;
rc = sqlite3_prepare(poDB, pszSQLCommand, strlen(pszSQLCommand),
&m_hStmt, NULL);
if (rc != SQLITE_OK) {
CPLError(CE_Failure, CPLE_AppDefined,
"In LoadProperties(): sqlite3_prepare(%s):\n %s",
pszSQLCommand, sqlite3_errmsg(poDB));
if(m_hStmt != NULL) {
FinalizeSQL();
}
return OGRERR_FAILURE;
}
rc = sqlite3_step(m_hStmt);
if (rc != SQLITE_ROW) {
CPLError(CE_Failure, CPLE_AppDefined,
"In ExecuteSQL(): sqlite3_step(%s):\n %s",
pszSQLCommand, sqlite3_errmsg(poDB));
if (m_hStmt) {
FinalizeSQL();
}
return OGRERR_FAILURE;
}
return OGRERR_NONE;
}
/*!
\brief VFKFeatureSQLite constructor (derived from VFKFeature)
Read VFK feature from VFK file and insert it into DB
*/
VFKFeatureSQLite::VFKFeatureSQLite(const VFKFeature *poVFKFeature) : IVFKFeature(poVFKFeature->m_poDataBlock)
{
m_nFID = poVFKFeature->m_nFID;
m_hStmt = NULL;
m_iRowId = m_poDataBlock->GetFeatureCount() + 1; /* starts at 1 */
}
/*!
\brief Load geometry (point layers)
\todo Implement (really needed?)
\return TRUE on success or FALSE on failure
*/
bool VFKFeatureSQLite::LoadGeometryPoint()
{
return FALSE;
}
/*!
\brief Load geometry (linestring SBP layer)
\todo Implement (really needed?)
\return TRUE on success or FALSE on failure
*/
bool VFKFeatureSQLite::LoadGeometryLineStringSBP()
{
return FALSE;
}
/*!
\brief Load geometry (linestring HP/DPM layer)
\todo Implement (really needed?)
\return TRUE on success or FALSE on failure
*/
bool VFKFeatureSQLite::LoadGeometryLineStringHP()
{
return FALSE;
}
/*!
\brief Load geometry (polygon BUD/PAR layers)
\todo Implement (really needed?)
\return TRUE on success or FALSE on failure
*/
bool VFKFeatureSQLite::LoadGeometryPolygon()
{
return FALSE;
}
/*!
\brief Load feature properties from DB
\param poFeature pointer to OGR feature
\return OGRERR_NONE on success or OGRERR_FAILURE on failure
*/
OGRErr VFKFeatureSQLite::LoadProperties(OGRFeature *poFeature)
{
CPLString osSQL;
osSQL.Printf("SELECT * FROM %s WHERE rowid = %d",
m_poDataBlock->GetName(), m_iRowId);
if (ExecuteSQL(osSQL.c_str()) != OGRERR_NONE)
return OGRERR_FAILURE;
for (int iField = 0; iField < m_poDataBlock->GetPropertyCount(); iField++) {
if (sqlite3_column_type(m_hStmt, iField) == SQLITE_NULL) /* skip null values */
continue;
OGRFieldType fType = poFeature->GetDefnRef()->GetFieldDefn(iField)->GetType();
if (fType == OFTInteger)
poFeature->SetField(iField,
sqlite3_column_int(m_hStmt, iField));
else if (fType == OFTReal)
poFeature->SetField(iField,
sqlite3_column_double(m_hStmt, iField));
else
poFeature->SetField(iField,
(const char *) sqlite3_column_text(m_hStmt, iField));
}
FinalizeSQL();
return OGRERR_NONE;
}
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