1 : /******************************************************************************
2 : * $Id: ogr_vrt.h 17729 2009-10-02 17:23:59Z warmerdam $
3 : *
4 : * Project: OpenGIS Simple Features Reference Implementation
5 : * Purpose: Private definitions for OGR/VRT driver.
6 : * Author: Frank Warmerdam, warmerdam@pobox.com
7 : *
8 : ******************************************************************************
9 : * Copyright (c) 2003, Frank Warmerdam <warmerdam@pobox.com>
10 : *
11 : * Permission is hereby granted, free of charge, to any person obtaining a
12 : * copy of this software and associated documentation files (the "Software"),
13 : * to deal in the Software without restriction, including without limitation
14 : * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 : * and/or sell copies of the Software, and to permit persons to whom the
16 : * Software is furnished to do so, subject to the following conditions:
17 : *
18 : * The above copyright notice and this permission notice shall be included
19 : * in all copies or substantial portions of the Software.
20 : *
21 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22 : * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
24 : * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
25 : * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
26 : * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
27 : * DEALINGS IN THE SOFTWARE.
28 : ****************************************************************************/
29 :
30 : #ifndef _OGR_VRT_H_INCLUDED
31 : #define _OGR_VRT_H_INCLUDED
32 :
33 : #include <vector>
34 : #include "ogrsf_frmts.h"
35 : #include "cpl_error.h"
36 : #include "cpl_minixml.h"
37 :
38 : typedef enum {
39 : VGS_None,
40 : VGS_Direct,
41 : VGS_PointFromColumns,
42 : VGS_WKT,
43 : VGS_WKB,
44 : VGS_Shape
45 : } OGRVRTGeometryStyle;
46 :
47 : /************************************************************************/
48 : /* OGRVRTLayer */
49 : /************************************************************************/
50 :
51 : class OGRVRTLayer : public OGRLayer
52 : {
53 : protected:
54 : OGRFeatureDefn *poFeatureDefn;
55 :
56 : OGRDataSource *poSrcDS;
57 : OGRLayer *poSrcLayer;
58 : int bNeedReset;
59 : int bSrcLayerFromSQL;
60 : int bSrcDSShared;
61 : int bAttrFilterPassThrough;
62 :
63 : // Layer spatial reference system, and srid.
64 : OGRSpatialReference *poSRS;
65 :
66 : char *pszAttrFilter;
67 :
68 : int bSrcClip;
69 : OGRGeometry *poSrcRegion;
70 :
71 : int iFIDField; // -1 means pass through.
72 : int iStyleField; // -1 means pass through.
73 :
74 : // Geometry interpretation related.
75 : OGRVRTGeometryStyle eGeometryType;
76 :
77 : int iGeomField;
78 :
79 : // VGS_PointFromColumn
80 : int iGeomXField, iGeomYField, iGeomZField;
81 :
82 : int bUseSpatialSubquery;
83 :
84 : // Attribute Mapping
85 : std::vector<int> anSrcField;
86 : std::vector<int> abDirectCopy;
87 :
88 : int bUpdate;
89 :
90 : OGRFeature *TranslateFeature( OGRFeature*& , int bUseSrcRegion );
91 : OGRErr createFromShapeBin( GByte *, OGRGeometry **, int );
92 :
93 : OGRFeature *TranslateVRTFeatureToSrcFeature( OGRFeature* poVRTFeature);
94 :
95 : int ResetSourceReading();
96 :
97 : public:
98 : OGRVRTLayer();
99 : virtual ~OGRVRTLayer();
100 :
101 : virtual int Initialize( CPLXMLNode *psLTree,
102 : const char *pszVRTDirectory,
103 : int bUpdate);
104 :
105 : virtual void ResetReading();
106 : virtual OGRFeature *GetNextFeature();
107 :
108 : virtual OGRFeature *GetFeature( long nFeatureId );
109 :
110 : virtual OGRErr SetNextByIndex( long nIndex );
111 :
112 62 : virtual OGRFeatureDefn *GetLayerDefn() { return poFeatureDefn; }
113 :
114 : virtual OGRSpatialReference *GetSpatialRef();
115 :
116 : virtual int GetFeatureCount( int );
117 :
118 : virtual OGRErr SetAttributeFilter( const char * );
119 :
120 : virtual int TestCapability( const char * );
121 :
122 : virtual OGRErr GetExtent( OGREnvelope *psExtent, int bForce );
123 :
124 : virtual void SetSpatialFilter( OGRGeometry * poGeomIn );
125 :
126 : virtual OGRErr CreateFeature( OGRFeature* poFeature );
127 :
128 : virtual OGRErr SetFeature( OGRFeature* poFeature );
129 :
130 : virtual OGRErr DeleteFeature( long nFID );
131 : };
132 :
133 : /************************************************************************/
134 : /* OGRVRTDataSource */
135 : /************************************************************************/
136 :
137 : class OGRVRTDataSource : public OGRDataSource
138 : {
139 : OGRVRTLayer **papoLayers;
140 : int nLayers;
141 :
142 : char *pszName;
143 :
144 : public:
145 : OGRVRTDataSource();
146 : ~OGRVRTDataSource();
147 :
148 : int Initialize( CPLXMLNode *psXML, const char *pszName,
149 : int bUpdate );
150 :
151 13 : const char *GetName() { return pszName; }
152 37 : int GetLayerCount() { return nLayers; }
153 : OGRLayer *GetLayer( int );
154 :
155 : int TestCapability( const char * );
156 : };
157 :
158 : /************************************************************************/
159 : /* OGRVRTDriver */
160 : /************************************************************************/
161 :
162 : class OGRVRTDriver : public OGRSFDriver
163 64 : {
164 : public:
165 : ~OGRVRTDriver();
166 :
167 : const char *GetName();
168 : OGRDataSource *Open( const char *, int );
169 : int TestCapability( const char * );
170 : };
171 :
172 :
173 : #endif /* ndef _OGR_VRT_H_INCLUDED */
174 :
175 :
|
