1 : /******************************************************************************
2 : * $Id: ogrsqliteselectlayer.cpp 10645 2007-01-18 02:22:39Z warmerdam $
3 : *
4 : * Project: OpenGIS Simple Features Reference Implementation
5 : * Purpose: Implements OGRSQLiteSelectLayer class, layer access to the results
6 : * of a SELECT statement executed via ExecuteSQL().
7 : * Author: Frank Warmerdam, warmerdam@pobox.com
8 : *
9 : ******************************************************************************
10 : * Copyright (c) 2004, Frank Warmerdam
11 : *
12 : * Permission is hereby granted, free of charge, to any person obtaining a
13 : * copy of this software and associated documentation files (the "Software"),
14 : * to deal in the Software without restriction, including without limitation
15 : * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 : * and/or sell copies of the Software, and to permit persons to whom the
17 : * Software is furnished to do so, subject to the following conditions:
18 : *
19 : * The above copyright notice and this permission notice shall be included
20 : * in all copies or substantial portions of the Software.
21 : *
22 : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
23 : * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 : * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 : * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 : * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 : * DEALINGS IN THE SOFTWARE.
29 : ****************************************************************************/
30 :
31 : #include "cpl_conv.h"
32 : #include "ogr_sqlite.h"
33 :
34 : CPL_CVSID("$Id: ogrsqliteselectlayer.cpp 10645 2007-01-18 02:22:39Z warmerdam $");
35 : /************************************************************************/
36 : /* OGRSQLiteSelectLayer() */
37 : /************************************************************************/
38 :
39 20 : OGRSQLiteSelectLayer::OGRSQLiteSelectLayer( OGRSQLiteDataSource *poDSIn,
40 20 : sqlite3_stmt *hStmtIn )
41 :
42 : {
43 20 : poDS = poDSIn;
44 :
45 20 : iNextShapeId = 0;
46 20 : nSRSId = -1;
47 20 : poFeatureDefn = NULL;
48 :
49 20 : hStmt = hStmtIn;
50 :
51 20 : BuildFeatureDefn( "SELECT", hStmt );
52 :
53 : // Reset so the next _step() will get the first record.
54 20 : sqlite3_reset( hStmt );
55 20 : }
56 :
57 : /************************************************************************/
58 : /* ~OGRSQLiteSelectLayer() */
59 : /************************************************************************/
60 :
61 40 : OGRSQLiteSelectLayer::~OGRSQLiteSelectLayer()
62 :
63 : {
64 20 : sqlite3_finalize( hStmt );
65 20 : hStmt = NULL;
66 40 : }
67 :
68 : /************************************************************************/
69 : /* ClearStatement() */
70 : /* */
71 : /* Called when GetNextRawFeature() runs out of rows. */
72 : /************************************************************************/
73 :
74 16 : void OGRSQLiteSelectLayer::ClearStatement()
75 :
76 : {
77 16 : }
78 :
79 : /************************************************************************/
80 : /* ResetReading() */
81 : /************************************************************************/
82 :
83 13 : void OGRSQLiteSelectLayer::ResetReading()
84 :
85 : {
86 13 : sqlite3_reset( hStmt );
87 13 : OGRSQLiteLayer::ResetReading();
88 13 : }
89 :
90 : /************************************************************************/
91 : /* GetFeature() */
92 : /************************************************************************/
93 :
94 2 : OGRFeature *OGRSQLiteSelectLayer::GetFeature( long nFeatureId )
95 :
96 : {
97 2 : return OGRSQLiteLayer::GetFeature( nFeatureId );
98 : }
99 :
100 : /************************************************************************/
101 : /* TestCapability() */
102 : /************************************************************************/
103 :
104 0 : int OGRSQLiteSelectLayer::TestCapability( const char * pszCap )
105 :
106 : {
107 0 : return OGRSQLiteLayer::TestCapability( pszCap );
108 : }
109 :
110 : /************************************************************************/
111 : /* GetFeatureCount() */
112 : /* */
113 : /* If a spatial filter is in effect, we turn control over to */
114 : /* the generic counter. Otherwise we return the total count. */
115 : /* Eventually we should consider implementing a more efficient */
116 : /* way of counting features matching a spatial query. */
117 : /************************************************************************/
118 :
119 5 : int OGRSQLiteSelectLayer::GetFeatureCount( int bForce )
120 :
121 : {
122 5 : return OGRSQLiteLayer::GetFeatureCount( bForce );
123 : }
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