GDAL

ogrunionlayer.h
1 /******************************************************************************
2 * $Id$
3 *
4 * Project: OpenGIS Simple Features Reference Implementation
5 * Purpose: Defines OGRUnionLayer class
6 * Author: Even Rouault, even dot rouault at spatialys.com
7 *
8 ******************************************************************************
9 * Copyright (c) 2012-2014, Even Rouault <even dot rouault at spatialys.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 OGRUNIONLAYER_H_INCLUDED
31 #define OGRUNIONLAYER_H_INCLUDED
32
33 #ifndef DOXYGEN_SKIP
34
35 #include "ogrsf_frmts.h"
36
37 /************************************************************************/
38 /* OGRUnionLayerGeomFieldDefn */
39 /************************************************************************/
40
41 class CPL_DLL OGRUnionLayerGeomFieldDefn final: public OGRGeomFieldDefn
42 {
43 public:
44
45 int bGeomTypeSet = false;
46 int bSRSSet = false;
47 OGREnvelope sStaticEnvelope{};
48
49 OGRUnionLayerGeomFieldDefn(const char* pszName, OGRwkbGeometryType eType);
50 explicit OGRUnionLayerGeomFieldDefn(const OGRGeomFieldDefn* poSrc);
51 explicit OGRUnionLayerGeomFieldDefn(const OGRUnionLayerGeomFieldDefn* poSrc);
52 ~OGRUnionLayerGeomFieldDefn();
53 };
54
55 /************************************************************************/
56 /* OGRUnionLayer */
57 /************************************************************************/
58
59 typedef enum
60 {
61 FIELD_FROM_FIRST_LAYER,
62 FIELD_UNION_ALL_LAYERS,
63 FIELD_INTERSECTION_ALL_LAYERS,
64 FIELD_SPECIFIED,
65 } FieldUnionStrategy;
66
67 class CPL_DLL OGRUnionLayer final: public OGRLayer
68 {
69 CPL_DISALLOW_COPY_ASSIGN(OGRUnionLayer)
70
71 protected:
72 CPLString osName;
73 int nSrcLayers;
74 OGRLayer **papoSrcLayers;
75 int bHasLayerOwnership;
76
77 OGRFeatureDefn *poFeatureDefn;
78 int nFields;
79 OGRFieldDefn **papoFields;
80 int nGeomFields;
81 OGRUnionLayerGeomFieldDefn **papoGeomFields;
82 FieldUnionStrategy eFieldStrategy;
83 CPLString osSourceLayerFieldName{};
84
85 int bPreserveSrcFID;
86
87 GIntBig nFeatureCount;
88
89 int iCurLayer;
90 char *pszAttributeFilter;
91 int nNextFID;
92 int *panMap;
93 char **papszIgnoredFields;
94 int bAttrFilterPassThroughValue;
95 int *pabModifiedLayers;
96 int *pabCheckIfAutoWrap;
97 OGRSpatialReference *poGlobalSRS;
98
99 void AutoWarpLayerIfNecessary(int iSubLayer);
100 OGRFeature *TranslateFromSrcLayer(OGRFeature* poSrcFeature);
101 void ApplyAttributeFilterToSrcLayer(int iSubLayer);
102 int GetAttrFilterPassThroughValue();
103 void ConfigureActiveLayer();
104 void SetSpatialFilterToSourceLayer(OGRLayer* poSrcLayer);
105
106 public:
107 OGRUnionLayer( const char* pszName,
108 int nSrcLayers, /* must be >= 1 */
109 OGRLayer** papoSrcLayers, /* array itself ownership always transferred, layer ownership depending on bTakeLayerOwnership */
110 int bTakeLayerOwnership);
111
112 virtual ~OGRUnionLayer();
113
114 /* All the following non virtual methods must be called just after the constructor */
115 /* and before any virtual method */
116 void SetFields(FieldUnionStrategy eFieldStrategy,
117 int nFields,
118 OGRFieldDefn** papoFields, /* duplicated by the method */
119 int nGeomFields, /* maybe -1 to explicitly disable geometry fields */
120 OGRUnionLayerGeomFieldDefn** papoGeomFields /* duplicated by the method */);
121 void SetSourceLayerFieldName(const char* pszSourceLayerFieldName);
122 void SetPreserveSrcFID(int bPreserveSrcFID);
123 void SetFeatureCount(int nFeatureCount);
124 virtual const char *GetName() override { return osName.c_str(); }
125 virtual OGRwkbGeometryType GetGeomType() override;
126
127 virtual void ResetReading() override;
128 virtual OGRFeature *GetNextFeature() override;
129
130 virtual OGRFeature *GetFeature( GIntBig nFeatureId ) override;
131
132 virtual OGRErr ICreateFeature( OGRFeature* poFeature ) override;
133
134 virtual OGRErr ISetFeature( OGRFeature* poFeature ) override;
135
136 virtual OGRFeatureDefn *GetLayerDefn() override;
137
138 virtual OGRSpatialReference *GetSpatialRef() override;
139
140 virtual GIntBig GetFeatureCount( int ) override;
141
142 virtual OGRErr SetAttributeFilter( const char * ) override;
143
144 virtual int TestCapability( const char * ) override;
145
146 virtual OGRErr GetExtent(int iGeomField, OGREnvelope *psExtent, int bForce = TRUE) override;
147 virtual OGRErr GetExtent( OGREnvelope *psExtent, int bForce ) override;
148
149 virtual void SetSpatialFilter( OGRGeometry * poGeomIn ) override;
150 virtual void SetSpatialFilter( int iGeomField, OGRGeometry * ) override;
151
152 virtual OGRErr SetIgnoredFields( const char **papszFields ) override;
153
154 virtual OGRErr SyncToDisk() override;
155 };
156
157 #endif /* #ifndef DOXYGEN_SKIP */
158
159 #endif // OGRUNIONLAYER_H_INCLUDED
OGRLayer::GetName
virtual const char * GetName()
Return the layer name.
Definition: ogrlayer.cpp:1727
OGRLayer::ICreateFeature
virtual OGRErr ICreateFeature(OGRFeature *poFeature)
Create and write a new feature within a layer.
Definition: ogrlayer.cpp:637
OGRLayer::ResetReading
virtual void ResetReading()=0
Reset feature reading to start on the first feature.
OGRLayer::GetSpatialRef
virtual OGRSpatialReference * GetSpatialRef()
Fetch the spatial reference system for this layer.
Definition: ogrlayer.cpp:1037
OGRSpatialReference
This class represents an OpenGIS Spatial Reference System, and contains methods for converting betwee...
Definition: ogr_spatialref.h:157
OGRLayer::GetFeatureCount
virtual GIntBig GetFeatureCount(int bForce=TRUE)
Fetch the feature count in this layer.
Definition: ogrlayer.cpp:173
OGRGeometry
Abstract base class for all geometry classes.
Definition: ogr_geometry.h:326
OGRLayer
This class represents a layer of simple features, with access methods.
Definition: ogrsf_frmts.h:70
CPLString
Convenient string class based on std::string.
Definition: cpl_string.h:319
OGRLayer::GetExtent
virtual OGRErr GetExtent(OGREnvelope *psExtent, int bForce=TRUE)
Fetch the extent of this layer.
Definition: ogrlayer.cpp:211
OGRLayer::ISetFeature
virtual OGRErr ISetFeature(OGRFeature *poFeature)
Rewrite an existing feature.
Definition: ogrlayer.cpp:598
OGRLayer::SetSpatialFilter
virtual void SetSpatialFilter(OGRGeometry *)
Set a new spatial filter.
Definition: ogrlayer.cpp:1113
OGRLayer::GetLayerDefn
virtual OGRFeatureDefn * GetLayerDefn()=0
Fetch the schema information for this layer.
ogrsf_frmts.h
OGRFieldDefn
Definition of an attribute of an OGRFeatureDefn.
Definition: ogr_feature.h:98
OGRGeomFieldDefn
Definition of a geometry field of an OGRFeatureDefn.
Definition: ogr_feature.h:201
OGRErr
int OGRErr
Type for a OGR error.
Definition: ogr_core.h:341
GIntBig
long long GIntBig
Large signed integer type (generally 64-bit integer type).
Definition: cpl_port.h:230
OGRwkbGeometryType
OGRwkbGeometryType
List of well known binary geometry types.
Definition: ogr_core.h:368
OGRFeature
A simple feature, including geometry and attributes.
Definition: ogr_feature.h:379
OGRLayer::SetIgnoredFields
virtual OGRErr SetIgnoredFields(const char **papszFields)
Set which fields can be omitted when retrieving features from the layer.
Definition: ogrlayer.cpp:1791
OGREnvelope
Simple container for a bounding region (rectangle)
Definition: ogr_core.h:57
OGRFeatureDefn
Definition of a feature class or feature layer.
Definition: ogr_feature.h:278
OGRLayer::GetGeomType
virtual OGRwkbGeometryType GetGeomType()
Return the layer geometry type.
Definition: ogrlayer.cpp:1754
OGRLayer::SetAttributeFilter
virtual OGRErr SetAttributeFilter(const char *)
Set a new attribute query.
Definition: ogrlayer.cpp:338
OGRLayer::TestCapability
virtual int TestCapability(const char *)=0
Test if this layer supported the named capability.
OGRLayer::GetNextFeature
virtual OGRFeature * GetNextFeature()=0
Fetch the next available feature from this layer.
OGRLayer::SyncToDisk
virtual OGRErr SyncToDisk()
Flush pending changes to disk.
Definition: ogrlayer.cpp:1519
OGRLayer::GetFeature
virtual OGRFeature * GetFeature(GIntBig nFID)
Fetch a feature by its identifier.
Definition: ogrlayer.cpp:447
CPL_DISALLOW_COPY_ASSIGN
#define CPL_DISALLOW_COPY_ASSIGN(ClassName)
Helper to remove the copy and assignment constructors so that the compiler will not generate the defa...
Definition: cpl_port.h:927