1 : /******************************************************************************
2 : * $Id: ogrunionlayer.h 24640 2012-07-01 19:37:38Z rouault $
3 : *
4 : * Project: OpenGIS Simple Features Reference Implementation
5 : * Purpose: Defines OGRUnionLayer class
6 : * Author: Even Rouault, even dot rouault at mines dash paris dot org
7 : *
8 : ******************************************************************************
9 : * Copyright (c) 2012, Even Rouault <even dot rouault at mines dash paris dot org>
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 _OGRUNIONLAYER_H_INCLUDED
31 : #define _OGRUNIONLAYER_H_INCLUDED
32 :
33 : #include "ogrsf_frmts.h"
34 :
35 : /************************************************************************/
36 : /* OGRUnionLayer */
37 : /************************************************************************/
38 :
39 : typedef enum
40 : {
41 : FIELD_FROM_FIRST_LAYER,
42 : FIELD_UNION_ALL_LAYERS,
43 : FIELD_INTERSECTION_ALL_LAYERS,
44 : FIELD_SPECIFIED,
45 : } FieldUnionStrategy;
46 :
47 : typedef enum
48 : {
49 : GEOMTYPE_FROM_FIRST_LAYER,
50 : GEOMTYPE_UNION_ALL_LAYERS,
51 : GEOMTYPE_SPECIFIED,
52 : } GeometryTypeUnionStrategy;
53 :
54 : class OGRUnionLayer : public OGRLayer
55 : {
56 : protected:
57 : CPLString osName;
58 : int nSrcLayers;
59 : OGRLayer **papoSrcLayers;
60 : int bHasLayerOwnership;
61 :
62 : OGRFeatureDefn *poFeatureDefn;
63 : int nFields;
64 : OGRFieldDefn **papoFields;
65 : FieldUnionStrategy eFieldStrategy;
66 : CPLString osSourceLayerFieldName;
67 :
68 : OGRwkbGeometryType eGeomType;
69 : GeometryTypeUnionStrategy eGeometryTypeStrategy;
70 :
71 : int bPreserveSrcFID;
72 :
73 : OGRSpatialReference *poSRS;
74 : int bSRSSet;
75 :
76 : int nFeatureCount;
77 : OGREnvelope sStaticEnvelope;
78 :
79 : int iCurLayer;
80 : char *pszAttributeFilter;
81 : int nNextFID;
82 : int *panMap;
83 : char **papszIgnoredFields;
84 : int bAttrFilterPassThroughValue;
85 : int *pabModifiedLayers;
86 : int *pabCheckIfAutoWrap;
87 :
88 : void AutoWarpLayerIfNecessary(int iSubLayer);
89 : OGRFeature *TranslateFromSrcLayer(OGRFeature* poSrcFeature);
90 : void ApplyAttributeFilterToSrcLayer(int iSubLayer);
91 : int GetAttrFilterPassThroughValue();
92 : void ConfigureActiveLayer();
93 :
94 : public:
95 : OGRUnionLayer( const char* pszName,
96 : int nSrcLayers, /* must be >= 1 */
97 : OGRLayer** papoSrcLayers, /* array itself ownership always transfered, layer ownership depending on bTakeLayerOwnership */
98 : int bTakeLayerOwnership);
99 :
100 : virtual ~OGRUnionLayer();
101 :
102 : /* All the following non virtual methods must be called just after the constructor */
103 : /* and before any virtual method */
104 : void SetSRS(OGRSpatialReference *poSRS); /* duplicated by the method */
105 : void SetFields(FieldUnionStrategy eFieldStrategy,
106 : int nFields,
107 : OGRFieldDefn** papoFields); /* duplicated by the method */
108 : void SetGeometryType(GeometryTypeUnionStrategy eGeometryTypeStrategy,
109 : OGRwkbGeometryType eGeomType);
110 : void SetSourceLayerFieldName(const char* pszSourceLayerFieldName);
111 : void SetPreserveSrcFID(int bPreserveSrcFID);
112 : void SetFeatureCount(int nFeatureCount);
113 : void SetExtent(double dfXMin, double dfYMin, double dfXMax, double dfYMax);
114 :
115 61 : virtual const char *GetName() { return osName.c_str(); }
116 : virtual OGRwkbGeometryType GetGeomType();
117 :
118 : virtual void ResetReading();
119 : virtual OGRFeature *GetNextFeature();
120 :
121 : virtual OGRFeature *GetFeature( long nFeatureId );
122 :
123 : virtual OGRErr CreateFeature( OGRFeature* poFeature );
124 :
125 : virtual OGRErr SetFeature( OGRFeature* poFeature );
126 :
127 : virtual OGRFeatureDefn *GetLayerDefn();
128 :
129 : virtual OGRSpatialReference *GetSpatialRef();
130 :
131 : virtual int GetFeatureCount( int );
132 :
133 : virtual OGRErr SetAttributeFilter( const char * );
134 :
135 : virtual int TestCapability( const char * );
136 :
137 : virtual OGRErr GetExtent( OGREnvelope *psExtent, int bForce );
138 :
139 : virtual void SetSpatialFilter( OGRGeometry * poGeomIn );
140 :
141 : virtual OGRErr SetIgnoredFields( const char **papszFields );
142 :
143 : virtual OGRErr SyncToDisk();
144 : };
145 :
146 : #endif // _OGRUNIONLAYER_H_INCLUDED
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