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Viewing changes to ogr/ogrsf_frmts/nas/ogrnasrelationlayer.cpp

  • Committer: Package Import Robot
  • Author(s): Francesco Paolo Lovergine
  • Date: 2012-05-07 15:04:42 UTC
  • mfrom: (5.5.16 experimental)
  • Revision ID: package-import@ubuntu.com-20120507150442-2eks97loeh6rq005
Tags: 1.9.0-1
* Ready for sid, starting transition.
* All symfiles updated to latest builds.
* Added dh_numpy call in debian/rules to depend on numpy ABI.
* Policy bumped to 3.9.3, no changes required.

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ogr/ogrsf_frmts/nas/ogrnasrelationlayer.cpp
 
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/******************************************************************************
 
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 * $Id: ogrnaslayer.cpp 10645 2007-01-18 02:22:39Z warmerdam $
 
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 *
 
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 * Project:  OGR
 
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 * Purpose:  Implements OGRNASRelationLayer class, a special layer holding all
 
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 *           the relations from the NAS file.
 
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 * Author:   Frank Warmerdam, warmerdam@pobox.com
 
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 *
 
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 ******************************************************************************
 
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 * Copyright (c) 2009, Frank Warmerdam <warmerdam@pobox.com>
 
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 *
 
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 * Permission is hereby granted, free of charge, to any person obtaining a
 
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 * copy of this software and associated documentation files (the "Software"),
 
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 * to deal in the Software without restriction, including without limitation
 
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 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 
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 * and/or sell copies of the Software, and to permit persons to whom the
 
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 * Software is furnished to do so, subject to the following conditions:
 
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 *
 
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 * The above copyright notice and this permission notice shall be included
 
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 * in all copies or substantial portions of the Software.
 
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 *
 
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 
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 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 
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 * DEALINGS IN THE SOFTWARE.
 
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 ****************************************************************************/
 
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#include "ogr_nas.h"
 
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#include "cpl_conv.h"
 
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#include "cpl_port.h"
 
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#include "cpl_string.h"
 
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CPL_CVSID("$Id: ogrnaslayer.cpp 10645 2007-01-18 02:22:39Z warmerdam $");
 
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/************************************************************************/
 
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/*                        OGRNASRelationLayer()                         */
 
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/************************************************************************/
 
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OGRNASRelationLayer::OGRNASRelationLayer( OGRNASDataSource *poDSIn )
 
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{
 
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    poDS = poDSIn;
 
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    iNextFeature = 0;
 
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    bPopulated = FALSE;
 
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/* -------------------------------------------------------------------- */
 
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/*      Establish the layer fields.                                     */
 
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/* -------------------------------------------------------------------- */
 
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    poFeatureDefn = new OGRFeatureDefn( "ALKIS_beziehungen" );
 
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    poFeatureDefn->Reference();
 
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    poFeatureDefn->SetGeomType( wkbNone );
 
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    OGRFieldDefn  oFD( "", OFTString );
 
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    oFD.SetName( "beziehung_von" );
 
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    poFeatureDefn->AddFieldDefn( &oFD );
 
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    oFD.SetName( "beziehungsart" );
 
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    poFeatureDefn->AddFieldDefn( &oFD );
 
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    oFD.SetName( "beziehung_zu" );
 
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    poFeatureDefn->AddFieldDefn( &oFD );
 
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}
 
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/************************************************************************/
 
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/*                        ~OGRNASRelationLayer()                        */
 
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/************************************************************************/
 
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OGRNASRelationLayer::~OGRNASRelationLayer()
 
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{
 
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    if( poFeatureDefn )
 
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        poFeatureDefn->Release();
 
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}
 
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/************************************************************************/
 
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/*                            ResetReading()                            */
 
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/************************************************************************/
 
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void OGRNASRelationLayer::ResetReading()
 
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{
 
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    iNextFeature = 0;
 
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}
 
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/************************************************************************/
 
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/*                           GetNextFeature()                           */
 
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/************************************************************************/
 
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OGRFeature *OGRNASRelationLayer::GetNextFeature()
 
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{
 
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    if( !bPopulated )
 
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        poDS->PopulateRelations();
 
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/* ==================================================================== */
 
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/*      Loop till we find and translate a feature meeting all our       */
 
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/*      requirements.                                                   */
 
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/* ==================================================================== */
 
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    while( TRUE )
 
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    {
 
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        // out of features?
 
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        if( iNextFeature >= (int) aoRelationCollection.size() )
 
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            return NULL;
 
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/* -------------------------------------------------------------------- */
 
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/*      The from/type/to values are stored in a packed string with      */
 
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/*      \0 separators for compactness.  Split out components.           */
 
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/* -------------------------------------------------------------------- */
 
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        const char *pszFromID, *pszType, *pszToID;
 
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        pszFromID = aoRelationCollection[iNextFeature].c_str();
 
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        pszType = pszFromID + strlen(pszFromID) + 1;
 
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        pszToID = pszType + strlen(pszType) + 1;
 
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        m_nFeaturesRead++;
 
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/* -------------------------------------------------------------------- */
 
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/*      Translate values into an OGRFeature.                            */
 
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/* -------------------------------------------------------------------- */
 
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        OGRFeature *poFeature = new OGRFeature( poFeatureDefn );
 
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        poFeature->SetField( 0, pszFromID );
 
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        poFeature->SetField( 1, pszType );
 
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        poFeature->SetField( 2, pszToID );
 
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        poFeature->SetFID( iNextFeature++ );
 
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/* -------------------------------------------------------------------- */
 
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/*      Test against the attribute query.                               */
 
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/* -------------------------------------------------------------------- */
 
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        if( m_poAttrQuery != NULL
 
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            && !m_poAttrQuery->Evaluate( poFeature ) )
 
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            delete poFeature;
 
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        else
 
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            return poFeature;
 
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    }
 
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143
    return NULL;
 
144
}
 
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/************************************************************************/
 
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/*                          GetFeatureCount()                           */
 
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/************************************************************************/
 
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int OGRNASRelationLayer::GetFeatureCount( int bForce )
 
151
 
 
152
{
 
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    if( !bPopulated )
 
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        poDS->PopulateRelations();
 
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    if( m_poAttrQuery == NULL )
 
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        return aoRelationCollection.size();
 
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    else
 
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        return OGRLayer::GetFeatureCount( bForce );
 
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}
 
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/************************************************************************/
 
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/*                           TestCapability()                           */
 
164
/************************************************************************/
 
165
 
 
166
int OGRNASRelationLayer::TestCapability( const char * pszCap )
 
167
 
 
168
{
 
169
    if( EQUAL(pszCap,OLCFastGetExtent) )
 
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        return TRUE;
 
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    else if( EQUAL(pszCap,OLCFastFeatureCount) )
 
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        return bPopulated && m_poAttrQuery == NULL;
 
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    else if( EQUAL(pszCap,OLCStringsAsUTF8) )
 
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        return TRUE;
 
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    else 
 
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        return FALSE;
 
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}
 
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/************************************************************************/
 
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/*                            AddRelation()                             */
 
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/************************************************************************/
 
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void OGRNASRelationLayer::AddRelation( const char *pszFromID,
 
187
                                       const char *pszType,
 
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                                       const char *pszToID )
 
189
 
 
190
{
 
191
    int nMergedLen = strlen(pszFromID) + strlen(pszType) + strlen(pszToID) + 3;
 
192
    char *pszMerged = (char *) CPLMalloc(nMergedLen);
 
193
    
 
194
    strcpy( pszMerged, pszFromID );
 
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    strcpy( pszMerged + strlen(pszFromID) + 1, pszType );
 
196
    strcpy( pszMerged + strlen(pszFromID) + strlen(pszType) + 2, pszToID );
 
197
 
 
198
    CPLString osRelation;
 
199
    osRelation.assign( pszMerged, nMergedLen );
 
200
 
 
201
    CPLFree( pszMerged );
 
202
 
 
203
    aoRelationCollection.push_back( osRelation );
 
204
}
 
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