Line data Source code
1 : /******************************************************************************
2 : * $Id$
3 : *
4 : * Project: JML .jml Translator
5 : * Purpose: Definition of classes for OGR JML driver.
6 : * Author: Even Rouault, even dot rouault at spatialys dot com
7 : *
8 : ******************************************************************************
9 : * Copyright (c) 2014, Even Rouault <even dot rouault at spatialys dot 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_JML_H_INCLUDED
31 : #define OGR_JML_H_INCLUDED
32 :
33 : #include "ogrsf_frmts.h"
34 : #include "ogr_p.h"
35 :
36 : #ifdef HAVE_EXPAT
37 : #include "ogr_expat.h"
38 : #endif
39 :
40 : #include <vector>
41 :
42 : class OGRJMLDataset;
43 :
44 : #ifdef HAVE_EXPAT
45 :
46 : /************************************************************************/
47 : /* OGRJMLColumn */
48 : /************************************************************************/
49 :
50 : class OGRJMLColumn
51 : {
52 : public:
53 : CPLString osName;
54 : CPLString osType;
55 : CPLString osElementName;
56 : CPLString osAttributeName;
57 : CPLString osAttributeValue;
58 : bool bIsBody; /* if false: attribute */
59 :
60 42 : OGRJMLColumn() : bIsBody(false)
61 : {
62 42 : }
63 : };
64 :
65 : /************************************************************************/
66 : /* OGRJMLLayer */
67 : /************************************************************************/
68 :
69 : class OGRJMLLayer final : public OGRLayer
70 : {
71 : GDALDataset *m_poDS = nullptr;
72 : OGRFeatureDefn *poFeatureDefn;
73 :
74 : int nNextFID;
75 : VSILFILE *fp;
76 : bool bHasReadSchema;
77 :
78 : XML_Parser oParser;
79 :
80 : int currentDepth;
81 : bool bStopParsing;
82 : int nWithoutEventCounter;
83 : int nDataHandlerCounter;
84 :
85 : bool bAccumulateElementValue;
86 : char *pszElementValue;
87 : int nElementValueLen;
88 : int nElementValueAlloc;
89 :
90 : OGRFeature *poFeature;
91 : OGRFeature **ppoFeatureTab;
92 : int nFeatureTabLength;
93 : int nFeatureTabIndex;
94 :
95 : bool bSchemaFinished;
96 : int nJCSGMLInputTemplateDepth;
97 : int nCollectionElementDepth;
98 : int nFeatureCollectionDepth;
99 : CPLString osCollectionElement;
100 : int nFeatureElementDepth;
101 : CPLString osFeatureElement;
102 : int nGeometryElementDepth;
103 : CPLString osGeometryElement;
104 : int nColumnDepth;
105 : int nNameDepth;
106 : int nTypeDepth;
107 : int nAttributeElementDepth;
108 : int iAttr;
109 : int iRGBField;
110 : CPLString osSRSName;
111 :
112 : OGRJMLColumn oCurColumn;
113 : std::vector<OGRJMLColumn> aoColumns;
114 :
115 : void AddStringToElementValue(const char *data, int nLen);
116 : void StopAccumulate();
117 :
118 : void LoadSchema();
119 :
120 : public:
121 : OGRJMLLayer(const char *pszLayerName, OGRJMLDataset *poDS, VSILFILE *fp);
122 : ~OGRJMLLayer();
123 :
124 28 : const char *GetName() override
125 : {
126 28 : return poFeatureDefn->GetName();
127 : }
128 :
129 : void ResetReading() override;
130 : OGRFeature *GetNextFeature() override;
131 :
132 : OGRFeatureDefn *GetLayerDefn() override;
133 :
134 : int TestCapability(const char *) override;
135 :
136 1 : GDALDataset *GetDataset() override
137 : {
138 1 : return m_poDS;
139 : }
140 :
141 : void startElementCbk(const char *pszName, const char **ppszAttr);
142 : void endElementCbk(const char *pszName);
143 : void dataHandlerCbk(const char *data, int nLen);
144 :
145 : void startElementLoadSchemaCbk(const char *pszName, const char **ppszAttr);
146 : void endElementLoadSchemaCbk(const char *pszName);
147 : };
148 :
149 : #endif /* HAVE_EXPAT */
150 :
151 : /************************************************************************/
152 : /* OGRJMLWriterLayer */
153 : /************************************************************************/
154 :
155 : class OGRJMLWriterLayer final : public OGRLayer
156 : {
157 : OGRJMLDataset *poDS;
158 : OGRFeatureDefn *poFeatureDefn;
159 : VSILFILE *fp;
160 : bool bFeaturesWritten;
161 : bool bAddRGBField;
162 : bool bAddOGRStyleField;
163 : bool bClassicGML;
164 : int nNextFID;
165 : CPLString osSRSAttr;
166 : OGREnvelope sLayerExtent;
167 : vsi_l_offset nBBoxOffset;
168 :
169 : void WriteColumnDeclaration(const char *pszName, const char *pszType);
170 :
171 : public:
172 : OGRJMLWriterLayer(const char *pszLayerName, OGRSpatialReference *poSRS,
173 : OGRJMLDataset *poDSIn, VSILFILE *fp, bool bAddRGBField,
174 : bool bAddOGRStyleField, bool bClassicGML);
175 : ~OGRJMLWriterLayer();
176 :
177 17 : void ResetReading() override
178 : {
179 17 : }
180 :
181 17 : OGRFeature *GetNextFeature() override
182 : {
183 17 : return nullptr;
184 : }
185 :
186 : OGRErr ICreateFeature(OGRFeature *poFeature) override;
187 : OGRErr CreateField(const OGRFieldDefn *poField, int bApproxOK) override;
188 :
189 309 : OGRFeatureDefn *GetLayerDefn() override
190 : {
191 309 : return poFeatureDefn;
192 : }
193 :
194 : int TestCapability(const char *) override;
195 :
196 : GDALDataset *GetDataset() override;
197 : };
198 :
199 : /************************************************************************/
200 : /* OGRJMLDataset */
201 : /************************************************************************/
202 :
203 : class OGRJMLDataset final : public GDALDataset
204 : {
205 : OGRLayer *poLayer;
206 :
207 : VSILFILE *fp; /* Virtual file API */
208 : bool bWriteMode;
209 :
210 : public:
211 : OGRJMLDataset();
212 : ~OGRJMLDataset();
213 :
214 31 : int GetLayerCount() override
215 : {
216 31 : return poLayer != nullptr ? 1 : 0;
217 : }
218 :
219 : OGRLayer *GetLayer(int) override;
220 :
221 : OGRLayer *ICreateLayer(const char *pszName,
222 : const OGRGeomFieldDefn *poGeomFieldDefn,
223 : CSLConstList papszOptions) override;
224 :
225 : int TestCapability(const char *) override;
226 :
227 : static int Identify(GDALOpenInfo *poOpenInfo);
228 : static GDALDataset *Open(GDALOpenInfo *poOpenInfo);
229 : static GDALDataset *Create(const char *pszFilename, int nBands, int nXSize,
230 : int nYSize, GDALDataType eDT,
231 : char **papszOptions);
232 : };
233 :
234 : #endif /* ndef OGR_JML_H_INCLUDED */
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