1 : /**********************************************************************
2 : * $Id: gmlhandler.cpp 13760 2008-02-11 17:48:30Z warmerdam $
3 : *
4 : * Project: GML Reader
5 : * Purpose: Implementation of NASHandler class.
6 : * Author: Frank Warmerdam, warmerdam@pobox.com
7 : *
8 : **********************************************************************
9 : * Copyright (c) 2002, Frank Warmerdam
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 OR
22 : * 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 : #include <ctype.h>
31 : #include "nasreaderp.h"
32 : #include "cpl_conv.h"
33 : #include "cpl_string.h"
34 :
35 : #define MAX_TOKEN_SIZE 1000
36 :
37 : /************************************************************************/
38 : /* NASHandler() */
39 : /************************************************************************/
40 :
41 9 : NASHandler::NASHandler( NASReader *poReader )
42 :
43 : {
44 9 : m_poReader = poReader;
45 9 : m_pszCurField = NULL;
46 9 : m_pszGeometry = NULL;
47 9 : m_nGeomAlloc = m_nGeomLen = 0;
48 9 : m_nDepthFeature = m_nDepth = 0;
49 9 : m_bIgnoreFeature = FALSE;
50 9 : }
51 :
52 : /************************************************************************/
53 : /* ~NASHandler() */
54 : /************************************************************************/
55 :
56 9 : NASHandler::~NASHandler()
57 :
58 : {
59 9 : CPLFree( m_pszCurField );
60 9 : CPLFree( m_pszGeometry );
61 9 : }
62 :
63 : /************************************************************************/
64 : /* GetAttributes() */
65 : /************************************************************************/
66 :
67 449744 : CPLString NASHandler::GetAttributes(const Attributes* attrs)
68 : {
69 449744 : CPLString osRes;
70 : char *pszString;
71 :
72 459649 : for(unsigned int i=0; i < attrs->getLength(); i++)
73 : {
74 9905 : osRes += " ";
75 9905 : pszString = tr_strdup(attrs->getQName(i));
76 9905 : osRes += pszString;
77 9905 : CPLFree( pszString );
78 9905 : osRes += "=\"";
79 9905 : pszString = tr_strdup(attrs->getValue(i));
80 9905 : osRes += pszString;
81 9905 : CPLFree( pszString );
82 9905 : osRes += "\"";
83 : }
84 0 : return osRes;
85 : }
86 :
87 :
88 : /************************************************************************/
89 : /* startElement() */
90 : /************************************************************************/
91 :
92 2235313 : void NASHandler::startElement(const XMLCh* const uri,
93 : const XMLCh* const localname,
94 : const XMLCh* const qname,
95 : const Attributes& attrs )
96 :
97 : {
98 : char szElementName[MAX_TOKEN_SIZE];
99 2235313 : GMLReadState *poState = m_poReader->GetState();
100 2235313 : const char *pszLast = NULL;
101 :
102 2235313 : tr_strcpy( szElementName, localname );
103 :
104 2235313 : if (m_bIgnoreFeature && m_nDepth >= m_nDepthFeature)
105 : {
106 1561936 : m_nDepth ++;
107 1561936 : return;
108 : }
109 :
110 : /* -------------------------------------------------------------------- */
111 : /* If we are in the midst of collecting a feature attribute */
112 : /* value, then this must be a complex attribute which we don't */
113 : /* try to collect for now, so just terminate the field */
114 : /* collection. */
115 : /* -------------------------------------------------------------------- */
116 673377 : if( m_pszCurField != NULL )
117 : {
118 50 : CPLFree( m_pszCurField );
119 50 : m_pszCurField = NULL;
120 : }
121 :
122 : /* -------------------------------------------------------------------- */
123 : /* If we are collecting geometry, or if we determine this is a */
124 : /* geometry element then append to the geometry info. */
125 : /* -------------------------------------------------------------------- */
126 673377 : if( m_pszGeometry != NULL
127 : || IsGeometryElement( szElementName ) )
128 : {
129 449744 : int nLNLen = tr_strlen( localname );
130 449744 : CPLString osAttributes = GetAttributes( &attrs );
131 :
132 : /* should save attributes too! */
133 :
134 449744 : if( m_pszGeometry == NULL )
135 6684 : m_nGeometryDepth = poState->m_nPathLength;
136 :
137 449744 : if( m_nGeomLen + nLNLen + 4 + (int)osAttributes.size() > m_nGeomAlloc )
138 : {
139 6684 : m_nGeomAlloc = (int) (m_nGeomAlloc * 1.3 + nLNLen + osAttributes.size() + 1000);
140 : m_pszGeometry = (char *)
141 6684 : CPLRealloc( m_pszGeometry, m_nGeomAlloc);
142 : }
143 :
144 449744 : strcpy( m_pszGeometry+m_nGeomLen, "<" );
145 449744 : tr_strcpy( m_pszGeometry+m_nGeomLen+1, localname );
146 :
147 449744 : if( osAttributes.size() > 0 )
148 : {
149 9572 : strcat( m_pszGeometry+m_nGeomLen, " " );
150 9572 : strcat( m_pszGeometry+m_nGeomLen, osAttributes );
151 : }
152 :
153 449744 : strcat( m_pszGeometry+m_nGeomLen, ">" );
154 449744 : m_nGeomLen += strlen(m_pszGeometry+m_nGeomLen);
155 : }
156 :
157 : /* -------------------------------------------------------------------- */
158 : /* Is this the ogc:Filter element in a wfs:Delete operation? */
159 : /* If so we translate it as a specialized sort of feature. */
160 : /* -------------------------------------------------------------------- */
161 223633 : else if( EQUAL(szElementName,"Filter")
162 : && (pszLast = m_poReader->GetState()->GetLastComponent()) != NULL
163 : && (EQUAL(pszLast,"Delete") || EQUAL(pszLast,"Replace")) )
164 : {
165 6 : const char* pszFilteredClassName = m_poReader->GetFilteredClassName();
166 6 : if ( pszFilteredClassName != NULL &&
167 : strcmp("Delete", pszFilteredClassName) != 0 )
168 : {
169 0 : m_bIgnoreFeature = TRUE;
170 0 : m_nDepthFeature = m_nDepth;
171 0 : m_nDepth ++;
172 :
173 0 : return;
174 : }
175 :
176 6 : m_bIgnoreFeature = FALSE;
177 :
178 6 : m_poReader->PushFeature( "Delete", attrs );
179 :
180 6 : m_nDepthFeature = m_nDepth;
181 6 : m_nDepth ++;
182 :
183 6 : m_poReader->SetFeaturePropertyDirectly( "typeName", CPLStrdup(m_osLastTypeName) );
184 6 : return;
185 : }
186 :
187 : /* -------------------------------------------------------------------- */
188 : /* Is it a feature? If so push a whole new state, and return. */
189 : /* -------------------------------------------------------------------- */
190 223627 : else if( m_poReader->IsFeatureElement( szElementName ) )
191 : {
192 69646 : m_osLastTypeName = szElementName;
193 :
194 69646 : const char* pszFilteredClassName = m_poReader->GetFilteredClassName();
195 :
196 130899 : if ( pszFilteredClassName != NULL &&
197 : strcmp(szElementName, pszFilteredClassName) != 0 )
198 : {
199 60918 : m_bIgnoreFeature = TRUE;
200 60918 : m_nDepthFeature = m_nDepth;
201 60918 : m_nDepth ++;
202 :
203 60918 : return;
204 : }
205 :
206 8728 : m_bIgnoreFeature = FALSE;
207 :
208 8728 : m_poReader->PushFeature( szElementName, attrs );
209 :
210 8728 : m_nDepthFeature = m_nDepth;
211 8728 : m_nDepth ++;
212 :
213 8728 : return;
214 : }
215 :
216 : /* -------------------------------------------------------------------- */
217 : /* If it is the wfs:Delete element, then remember the typeName */
218 : /* attribute so we can assign it to the feature that will be */
219 : /* produced when we process the Filter element. */
220 : /* -------------------------------------------------------------------- */
221 153981 : else if( EQUAL(szElementName,"Delete") )
222 : {
223 : int nIndex;
224 : XMLCh Name[100];
225 :
226 4 : tr_strcpy( Name, "typeName" );
227 4 : nIndex = attrs.getIndex( Name );
228 :
229 4 : if( nIndex != -1 )
230 : {
231 4 : char *pszTypeName = tr_strdup( attrs.getValue( nIndex ) );
232 4 : m_osLastTypeName = pszTypeName;
233 4 : CPLFree( pszTypeName );
234 : }
235 : }
236 :
237 : /* -------------------------------------------------------------------- */
238 : /* If it is (or at least potentially is) a simple attribute, */
239 : /* then start collecting it. */
240 : /* -------------------------------------------------------------------- */
241 153977 : else if( m_poReader->IsAttributeElement( szElementName ) )
242 : {
243 38579 : CPLFree( m_pszCurField );
244 38579 : m_pszCurField = CPLStrdup("");
245 :
246 : // Capture href as OB property.
247 38579 : m_poReader->CheckForRelations( szElementName, attrs );
248 :
249 : // Capture "fid" attribute as part of the property value -
250 : // primarily this is for wfs:Delete operation's FeatureId attribute.
251 38579 : if( EQUAL(szElementName,"FeatureId") )
252 6 : m_poReader->CheckForFID( attrs, &m_pszCurField );
253 : }
254 :
255 : /* -------------------------------------------------------------------- */
256 : /* Push the element onto the current state's path. */
257 : /* -------------------------------------------------------------------- */
258 603725 : poState->PushPath( szElementName );
259 :
260 603725 : m_nDepth ++;
261 : }
262 :
263 : /************************************************************************/
264 : /* endElement() */
265 : /************************************************************************/
266 2235294 : void NASHandler::endElement(const XMLCh* const uri,
267 : const XMLCh* const localname,
268 : const XMLCh* const qname )
269 :
270 : {
271 : char szElementName[MAX_TOKEN_SIZE];
272 2235294 : GMLReadState *poState = m_poReader->GetState();
273 :
274 2235294 : tr_strcpy( szElementName, localname );
275 :
276 :
277 2235294 : m_nDepth --;
278 :
279 2235294 : if (m_bIgnoreFeature && m_nDepth >= m_nDepthFeature)
280 : {
281 1622854 : if (m_nDepth == m_nDepthFeature)
282 : {
283 60918 : m_bIgnoreFeature = FALSE;
284 60918 : m_nDepthFeature = 0;
285 : }
286 1622854 : return;
287 : }
288 :
289 : /* -------------------------------------------------------------------- */
290 : /* Is this closing off an attribute value? We assume so if */
291 : /* we are collecting an attribute value and got to this point. */
292 : /* We don't bother validating that the closing tag matches the */
293 : /* opening tag. */
294 : /* -------------------------------------------------------------------- */
295 612440 : if( m_pszCurField != NULL )
296 : {
297 38529 : CPLAssert( poState->m_poFeature != NULL );
298 :
299 38529 : m_poReader->SetFeaturePropertyDirectly( poState->osPath.c_str(), m_pszCurField );
300 38529 : m_pszCurField = NULL;
301 : }
302 :
303 : /* -------------------------------------------------------------------- */
304 : /* If we are collecting Geometry than store it, and consider if */
305 : /* this is the end of the geometry. */
306 : /* -------------------------------------------------------------------- */
307 612440 : if( m_pszGeometry != NULL )
308 : {
309 449744 : int nLNLen = tr_strlen( localname );
310 :
311 : /* should save attributes too! */
312 :
313 449744 : if( m_nGeomLen + nLNLen + 4 > m_nGeomAlloc )
314 : {
315 0 : m_nGeomAlloc = (int) (m_nGeomAlloc * 1.3 + nLNLen + 1000);
316 : m_pszGeometry = (char *)
317 0 : CPLRealloc( m_pszGeometry, m_nGeomAlloc);
318 : }
319 :
320 449744 : strcat( m_pszGeometry+m_nGeomLen, "</" );
321 449744 : tr_strcpy( m_pszGeometry+m_nGeomLen+2, localname );
322 449744 : strcat( m_pszGeometry+m_nGeomLen+nLNLen+2, ">" );
323 449744 : m_nGeomLen += strlen(m_pszGeometry+m_nGeomLen);
324 :
325 449744 : if( poState->m_nPathLength == m_nGeometryDepth+1 )
326 : {
327 6684 : if( poState->m_poFeature != NULL )
328 : {
329 6684 : CPLXMLNode* psNode = CPLParseXMLString(m_pszGeometry);
330 6684 : if (psNode)
331 6684 : poState->m_poFeature->SetGeometryDirectly( psNode );
332 : }
333 :
334 6684 : CPLFree( m_pszGeometry );
335 6684 : m_pszGeometry = NULL;
336 6684 : m_nGeomAlloc = m_nGeomLen = 0;
337 : }
338 : }
339 :
340 : /* -------------------------------------------------------------------- */
341 : /* If we are collecting a feature, and this element tag matches */
342 : /* element name for the class, then we have finished the */
343 : /* feature, and we pop the feature read state. */
344 : /* -------------------------------------------------------------------- */
345 612440 : if( m_nDepth == m_nDepthFeature && poState->m_poFeature != NULL
346 : && EQUAL(szElementName,
347 : poState->m_poFeature->GetClass()->GetElementName()) )
348 : {
349 8728 : m_nDepthFeature = 0;
350 8728 : m_poReader->PopState();
351 : }
352 :
353 : /* -------------------------------------------------------------------- */
354 : /* Ends of a wfs:Delete should be triggered on the close of the */
355 : /* <Filter> element. */
356 : /* -------------------------------------------------------------------- */
357 603712 : else if( m_nDepth == m_nDepthFeature
358 : && poState->m_poFeature != NULL
359 : && EQUAL(szElementName,"Filter")
360 : && EQUAL(poState->m_poFeature->GetClass()->GetElementName(),
361 : "Delete") )
362 : {
363 6 : m_nDepthFeature = 0;
364 6 : m_poReader->PopState();
365 : }
366 :
367 : /* -------------------------------------------------------------------- */
368 : /* Otherwise, we just pop the element off the local read states */
369 : /* element stack. */
370 : /* -------------------------------------------------------------------- */
371 : else
372 : {
373 603706 : if( EQUAL(szElementName,poState->GetLastComponent()) )
374 603706 : poState->PopPath();
375 : else
376 : {
377 0 : CPLAssert( FALSE );
378 : }
379 : }
380 : }
381 :
382 : /************************************************************************/
383 : /* characters() */
384 : /************************************************************************/
385 :
386 : #if XERCES_VERSION_MAJOR >= 3
387 4417187 : void NASHandler::characters( const XMLCh *const chars_in,
388 : const XMLSize_t length )
389 : #else
390 : void NASHandler::characters(const XMLCh* const chars_in,
391 : const unsigned int length )
392 : #endif
393 :
394 : {
395 4417187 : const XMLCh *chars = chars_in;
396 :
397 4417187 : if( m_pszCurField != NULL )
398 : {
399 36065 : int nCurFieldLength = strlen(m_pszCurField);
400 :
401 36065 : if (nCurFieldLength == 0)
402 : {
403 : // Ignore white space
404 72528 : while( *chars == ' ' || *chars == 10 || *chars == 13 || *chars == '\t')
405 398 : chars++;
406 : }
407 :
408 36065 : char *pszTranslated = tr_strdup(chars);
409 :
410 36065 : if( m_pszCurField == NULL )
411 : {
412 0 : m_pszCurField = pszTranslated;
413 0 : nCurFieldLength = strlen(m_pszCurField);
414 : }
415 : else
416 : {
417 : m_pszCurField = (char *)
418 : CPLRealloc( m_pszCurField,
419 36065 : nCurFieldLength+strlen(pszTranslated)+1 );
420 36065 : strcpy( m_pszCurField + nCurFieldLength, pszTranslated );
421 36065 : CPLFree( pszTranslated );
422 : }
423 : }
424 4381122 : else if( m_pszGeometry != NULL )
425 : {
426 892804 : if (m_nGeomLen == 0)
427 : {
428 : // Ignore white space
429 0 : while( *chars == ' ' || *chars == 10 || *chars == 13 || *chars == '\t')
430 0 : chars++;
431 : }
432 :
433 892804 : int nCharsLen = tr_strlen(chars);
434 :
435 892804 : if( m_nGeomLen + nCharsLen*4 + 4 > m_nGeomAlloc )
436 : {
437 11966 : m_nGeomAlloc = (int) (m_nGeomAlloc * 1.3 + nCharsLen*4 + 1000);
438 : m_pszGeometry = (char *)
439 11966 : CPLRealloc( m_pszGeometry, m_nGeomAlloc);
440 : }
441 :
442 892804 : tr_strcpy( m_pszGeometry+m_nGeomLen, chars );
443 892804 : m_nGeomLen += strlen(m_pszGeometry+m_nGeomLen);
444 : }
445 4417187 : }
446 :
447 : /************************************************************************/
448 : /* fatalError() */
449 : /************************************************************************/
450 :
451 0 : void NASHandler::fatalError( const SAXParseException &exception)
452 :
453 : {
454 : char *pszErrorMessage;
455 :
456 0 : pszErrorMessage = tr_strdup( exception.getMessage() );
457 : CPLError( CE_Failure, CPLE_AppDefined,
458 : "XML Parsing Error: %s\n",
459 0 : pszErrorMessage );
460 :
461 0 : CPLFree( pszErrorMessage );
462 0 : }
463 :
464 : /************************************************************************/
465 : /* IsGeometryElement() */
466 : /************************************************************************/
467 :
468 230317 : int NASHandler::IsGeometryElement( const char *pszElement )
469 :
470 : {
471 : return strcmp(pszElement,"Polygon") == 0
472 : || strcmp(pszElement,"MultiPolygon") == 0
473 : || strcmp(pszElement,"MultiPoint") == 0
474 : || strcmp(pszElement,"MultiLineString") == 0
475 : || strcmp(pszElement,"MultiSurface") == 0
476 : || strcmp(pszElement,"GeometryCollection") == 0
477 : || strcmp(pszElement,"Point") == 0
478 : || strcmp(pszElement,"Curve") == 0
479 : || strcmp(pszElement,"Surface") == 0
480 : || strcmp(pszElement,"PolygonPatch") == 0
481 230317 : || strcmp(pszElement,"LineString") == 0;
482 : }
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