# ogrunionlayer.h

    00001 /******************************************************************************
    00002  * $Id: ogrunionlayer.h 27044 2014-03-16 23:41:27Z rouault $
    00003  *
    00004  * Project:  OpenGIS Simple Features Reference Implementation
    00005  * Purpose:  Defines OGRUnionLayer class
    00006  * Author:   Even Rouault, even dot rouault at mines dash paris dot org
    00007  *
    00008  ******************************************************************************
    00009  * Copyright (c) 2012-2014, Even Rouault <even dot rouault at mines-paris dot org>
    00010  *
    00011  * Permission is hereby granted, free of charge, to any person obtaining a
    00012  * copy of this software and associated documentation files (the "Software"),
    00013  * to deal in the Software without restriction, including without limitation
    00014  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
    00015  * and/or sell copies of the Software, and to permit persons to whom the
    00016  * Software is furnished to do so, subject to the following conditions:
    00017  *
    00018  * The above copyright notice and this permission notice shall be included
    00019  * in all copies or substantial portions of the Software.
    00020  *
    00021  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
    00022  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    00023  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
    00024  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    00025  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    00026  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    00027  * DEALINGS IN THE SOFTWARE.
    00028  ****************************************************************************/
    00029
    00030 #ifndef _OGRUNIONLAYER_H_INCLUDED
    00031 #define _OGRUNIONLAYER_H_INCLUDED
    00032
    00033 #include "ogrsf_frmts.h"
    00034
    00035 /************************************************************************/
    00036 /*                      OGRUnionLayerGeomFieldDefn                      */
    00037 /************************************************************************/
    00038
    00039 class OGRUnionLayerGeomFieldDefn: public OGRGeomFieldDefn
    00040 {
    00041     public:
    00042
    00043     int             bGeomTypeSet;
    00044     int             bSRSSet;
    00045     OGREnvelope     sStaticEnvelope;
    00046
    00047             OGRUnionLayerGeomFieldDefn(const char* pszName, OGRwkbGeometryType eType);
    00048             OGRUnionLayerGeomFieldDefn(OGRGeomFieldDefn* poSrc);
    00049             OGRUnionLayerGeomFieldDefn(OGRUnionLayerGeomFieldDefn* poSrc);
    00050            ~OGRUnionLayerGeomFieldDefn();
    00051 };
    00052
    00053 /************************************************************************/
    00054 /*                         OGRUnionLayer                                */
    00055 /************************************************************************/
    00056
    00057 typedef enum
    00058 {
    00059     FIELD_FROM_FIRST_LAYER,
    00060     FIELD_UNION_ALL_LAYERS,
    00061     FIELD_INTERSECTION_ALL_LAYERS,
    00062     FIELD_SPECIFIED,
    00063 } FieldUnionStrategy;
    00064
    00065 class OGRUnionLayer : public OGRLayer
    00066 {
    00067   protected:
    00068     CPLString           osName;
    00069     int                 nSrcLayers;
    00070     OGRLayer          **papoSrcLayers;
    00071     int                 bHasLayerOwnership;
    00072
    00073     OGRFeatureDefn     *poFeatureDefn;
    00074     int                 nFields;
    00075     OGRFieldDefn      **papoFields;
    00076     int                 nGeomFields;
    00077     OGRUnionLayerGeomFieldDefn **papoGeomFields;
    00078     FieldUnionStrategy eFieldStrategy;
    00079     CPLString           osSourceLayerFieldName;
    00080
    00081     int                 bPreserveSrcFID;
    00082
    00083     int                 nFeatureCount;
    00084
    00085     int                 iCurLayer;
    00086     char               *pszAttributeFilter;
    00087     int                 nNextFID;
    00088     int                *panMap;
    00089     char              **papszIgnoredFields;
    00090     int                 bAttrFilterPassThroughValue;
    00091     int                *pabModifiedLayers;
    00092     int                *pabCheckIfAutoWrap;
    00093     OGRSpatialReference *poGlobalSRS;
    00094
    00095     void                AutoWarpLayerIfNecessary(int iSubLayer);
    00096     OGRFeature         *TranslateFromSrcLayer(OGRFeature* poSrcFeature);
    00097     void                ApplyAttributeFilterToSrcLayer(int iSubLayer);
    00098     int                 GetAttrFilterPassThroughValue();
    00099     void                ConfigureActiveLayer();
    00100     void                SetSpatialFilterToSourceLayer(OGRLayer* poSrcLayer);
    00101
    00102   public:
    00103                         OGRUnionLayer( const char* pszName,
    00104                                        int nSrcLayers, /* must be >= 1 */
    00105                                        OGRLayer** papoSrcLayers, /* array itself ownership always transfered, layer ownership depending on bTakeLayerOwnership */
    00106                                        int bTakeLayerOwnership);
    00107
    00108     virtual             ~OGRUnionLayer();
    00109
    00110     /* All the following non virtual methods must be called just after the constructor */
    00111     /* and before any virtual method */
    00112     void                SetFields(FieldUnionStrategy eFieldStrategy,
    00113                                   int nFields,
    00114                                   OGRFieldDefn** papoFields,  /* duplicated by the method */
    00115                                   int nGeomFields, /* maybe -1 to explicitely disable geometry fields */
    00116                                   OGRUnionLayerGeomFieldDefn** papoGeomFields  /* duplicated by the method */);
    00117     void                SetSourceLayerFieldName(const char* pszSourceLayerFieldName);
    00118     void                SetPreserveSrcFID(int bPreserveSrcFID);
    00119     void                SetFeatureCount(int nFeatureCount);
    00120     virtual const char  *GetName() { return osName.c_str(); }
    00121     virtual OGRwkbGeometryType GetGeomType();
    00122
    00123     virtual void        ResetReading();
    00124     virtual OGRFeature *GetNextFeature();
    00125
    00126     virtual OGRFeature *GetFeature( long nFeatureId );
    00127
    00128     virtual OGRErr      CreateFeature( OGRFeature* poFeature );
    00129
    00130     virtual OGRErr      SetFeature( OGRFeature* poFeature );
    00131
    00132     virtual OGRFeatureDefn *GetLayerDefn();
    00133
    00134     virtual OGRSpatialReference *GetSpatialRef();
    00135
    00136     virtual int         GetFeatureCount( int );
    00137
    00138     virtual OGRErr      SetAttributeFilter( const char * );
    00139
    00140     virtual int         TestCapability( const char * );
    00141
    00142     virtual OGRErr      GetExtent(int iGeomField, OGREnvelope *psExtent, int bForce = TRUE);
    00143     virtual OGRErr      GetExtent( OGREnvelope *psExtent, int bForce );
    00144
    00145     virtual void        SetSpatialFilter( OGRGeometry * poGeomIn );
    00146     virtual void        SetSpatialFilter( int iGeomField, OGRGeometry * );
    00147
    00148     virtual OGRErr      SetIgnoredFields( const char **papszFields );
    00149
    00150     virtual OGRErr      SyncToDisk();
    00151 };
    00152
    00153 #endif // _OGRUNIONLAYER_H_INCLUDED

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