/****************************************************************************** * $Id: ogrntffeatureclasslayer.cpp 10646 2007-01-18 02:38:10Z warmerdam $ * * Project:  UK NTF Reader * Purpose:  Implements OGRNTFFeatureClassLayer class. * Author:   Frank Warmerdam, warmerdam@pobox.com * ****************************************************************************** * Copyright (c) 1999, Frank Warmerdam * * 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 "ntf.h"#include "cpl_conv.h"CPL_CVSID("$Id: ogrntffeatureclasslayer.cpp 10646 2007-01-18 02:38:10Z warmerdam $");/************************************************************************//*                      OGRNTFFeatureClassLayer()                       *//*                                                                      *//*      Note that the OGRNTFLayer assumes ownership of the passed       *//*      OGRFeatureDefn object.                                          *//************************************************************************/OGRNTFFeatureClassLayer::OGRNTFFeatureClassLayer( OGRNTFDataSource *poDSIn ){    poFilterGeom = NULL;    poDS = poDSIn;    iCurrentFC = 0;/* -------------------------------------------------------------------- *//*      Establish the schema.                                           *//* -------------------------------------------------------------------- */    poFeatureDefn = new OGRFeatureDefn( "FEATURE_CLASSES" );    poFeatureDefn->SetGeomType( wkbNone );    poFeatureDefn->Reference();    OGRFieldDefn      oFCNum( "FEAT_CODE", OFTString );    oFCNum.SetWidth( 4 );    poFeatureDefn->AddFieldDefn( &oFCNum );        OGRFieldDefn      oFCName( "FC_NAME", OFTString );    oFCNum.SetWidth( 80 );    poFeatureDefn->AddFieldDefn( &oFCName );}/************************************************************************//*                      ~OGRNTFFeatureClassLayer()                      *//************************************************************************/OGRNTFFeatureClassLayer::~OGRNTFFeatureClassLayer(){    if( poFeatureDefn )        poFeatureDefn->Release();    if( poFilterGeom != NULL )        delete poFilterGeom;}/************************************************************************//*                          SetSpatialFilter()                          *//************************************************************************/void OGRNTFFeatureClassLayer::SetSpatialFilter( OGRGeometry * poGeomIn ){    if( poFilterGeom != NULL )    {        delete poFilterGeom;        poFilterGeom = NULL;    }    if( poGeomIn != NULL )        poFilterGeom = poGeomIn->clone();}/************************************************************************//*                            ResetReading()                            *//************************************************************************/void OGRNTFFeatureClassLayer::ResetReading(){    iCurrentFC = 0;}/************************************************************************//*                           GetNextFeature()                           *//************************************************************************/OGRFeature *OGRNTFFeatureClassLayer::GetNextFeature(){    if( iCurrentFC >= GetFeatureCount() )        return NULL;    return GetFeature( (long) iCurrentFC++ );}/************************************************************************//*                             GetFeature()                             *//************************************************************************/OGRFeature *OGRNTFFeatureClassLayer::GetFeature( long nFeatureId ){    char        *pszFCName, *pszFCId;    if( nFeatureId < 0 || nFeatureId >= poDS->GetFCCount() )        return NULL;        poDS->GetFeatureClass( nFeatureId, &pszFCId, &pszFCName );    /* -------------------------------------------------------------------- *//*      Create a corresponding feature.                                 *//* -------------------------------------------------------------------- */    OGRFeature  *poFeature = new OGRFeature( poFeatureDefn );    poFeature->SetField( 0, pszFCId );    poFeature->SetField( 1, pszFCName );    poFeature->SetFID( nFeatureId );        return poFeature;}/************************************************************************//*                          GetFeatureCount()                           *//*                                                                      *//*      If a spatial filter is in effect, we turn control over to       *//*      the generic counter.  Otherwise we return the total count.      *//*      Eventually we should consider implementing a more efficient     *//*      way of counting features matching a spatial query.              *//************************************************************************/int OGRNTFFeatureClassLayer::GetFeatureCount( int bForce ){    return poDS->GetFCCount();}/************************************************************************//*                           TestCapability()                           *//************************************************************************/int OGRNTFFeatureClassLayer::TestCapability( const char * pszCap ){    if( EQUAL(pszCap,OLCRandomRead) )        return TRUE;    else if( EQUAL(pszCap,OLCSequentialWrite)              || EQUAL(pszCap,OLCRandomWrite) )        return FALSE;    else if( EQUAL(pszCap,OLCFastFeatureCount) )        return TRUE;    else if( EQUAL(pszCap,OLCFastSpatialFilter) )        return TRUE;    else         return FALSE;}