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Diffstat (limited to 'manuals_and_examples/examples/c++/query2.cc')
| -rw-r--r-- | manuals_and_examples/examples/c++/query2.cc | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/manuals_and_examples/examples/c++/query2.cc b/manuals_and_examples/examples/c++/query2.cc deleted file mode 100644 index 6388e78..0000000 --- a/manuals_and_examples/examples/c++/query2.cc +++ /dev/null @@ -1,181 +0,0 @@ -/* -* This file is part of rasdaman community. -* -* Rasdaman community is free software: you can redistribute it and/or modify -* it under the terms of the GNU General Public License as published by -* the Free Software Foundation, either version 3 of the License, or -* (at your option) any later version. -* -* Rasdaman community is distributed in the hope that it will be useful, -* but WITHOUT ANY WARRANTY; without even the implied warranty of -* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -* GNU General Public License for more details. -* -* You should have received a copy of the GNU General Public License -* along with rasdaman community. If not, see <http://www.gnu.org/licenses/>. -* -* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann / -rasdaman GmbH. -* -* For more information please see <http://www.rasdaman.org> -* or contact Peter Baumann via <baumann@rasdaman.com>. -*/ -/************************************************************* - * - * - * PURPOSE: - * Example program for rasql query invocation from C++, showing a - * typical mapping scenario. - * - * - * BUGS: - * - needs this link cmd line - * query2: query2.o - * $(CXX) $(LDFLAGS) -o $@ $^ \ - * -L$(RMANHOME)/lib -lrasodmg -lclientcomm -lcompression -lconversion -lraslib -lnetwork -ljpeg -lpng -ltiff -lmfhdf -ldf -lcrypt o -lclientcomm -lm -lz - * - ************************************************************/ - -#include <iostream> - -// Linux needs this for template instantiation -#ifdef EARLY_TEMPLATE -#define __EXECUTABLE__ -#ifdef __GNUG__ -#include "raslib/template_inst.hh" -#endif -#endif - -// this file is generated by the rasdl processor -#include "basictypes.hh" - -// connectivity constants -char *host = "localhost"; -int port = 7001; -char *db = "RASBASE"; -char *userName = "rasguest"; -char *userPass = "rasguest"; - -// demo program settings -// - collection ("map") name -char *collection = "rgb"; -// - coordinates of map bbox to be retrieved -unsigned int xImageLo = 100; -unsigned int xImageHi = 200; -unsigned int yImageLo = 100; -unsigned int yImageHi = 200; -// - target window size -unsigned int xSize = 10; -unsigned int ySize = 10; - -// global connection objects -r_Database database; -r_Transaction transaction; - -// sample image accessing function, typical for mapping applications -// input: collection ("map") name, source image coordinates, target window size -// output: ptr to image array -// precondition: we're accessing an RGB image, so that we can select the "green" channel of it -// note: the most important parts contain markups at the beginning of the line -unsigned char *readImage( const char *collection, int xImageLo, int xImageHi, int yImageLo, int yImageHi, int xSize, int ySize ) throw (r_Error) -{ - r_Set< r_Ref< r_GMarray > > imageSet; // result set - r_Ref< r_GMarray > image; - r_Iterator< r_Ref< r_GMarray > > iter; - - // function result - unsigned char *result = NULL; - - try - { - cout << "creating query..." << flush; - // parameters: - // $1 map bbox coordinate, lower x - // $2 map bbox coordinate, upper x - // $3 map bbox coordinate, lower y - // $4 map bbox coordinate, upper y - // $5 result window x size - // $6 result window y size - // $7 collection (i.e., map) name -/* 1 */ r_OQL_Query query("select scale(img.green[$1:$2,$3:$4],[1:$5,1:$6]) from $7 as img"); - - cout << "substituting parameters ..." << flush; -/* 2 */ query << xImageLo << xImageHi << yImageLo << yImageHi << xSize << ySize << collection; - cout << "[query: " << query.get_query() << "]..."; - - cout << "executing query..." << flush; -/* 3 */ r_oql_execute( query, imageSet ); - - // now we assume a result has come back - iter = imageSet.create_iterator(); - iter.reset(); -/* 4 */ result = (unsigned char*) (*iter)->get_array(); - - } - catch(r_Error& e) - { - cout << "Error: query failed: " << e.what() << flush; - throw; - } - - return result; -} - -// simple wrapper, handling db connectivity and demo output -int main() -{ - try - { - database.set_servername( host, port ); - database.set_useridentification( userName, userPass ); - - cout << "Opening database " << db << " on " << host << "..." << flush; - database.open( db ); - - cout << "starting read-only transaction..." << flush; - transaction.begin( r_Transaction::read_only ); - - // the real workhorse: fetch image data - unsigned char *imgPtr = readImage( collection, xImageLo, xImageHi, yImageLo, yImageHi, xSize, ySize ); - - cout << "result image:" << endl << hex; - for (int i = 0; i < xSize; i++) - { - for (int j = 0; j < ySize; j++) - { - register unsigned char c = *imgPtr; - cout << " " << setw(2) << (unsigned short) (c & 0xFF); - imgPtr++; - } - cout << endl; - } - cout << dec; - } - catch(r_Error& e) - { - cout << "Error: cannot access database: " << e.what() << endl << flush; - } - - - // ignore any (previous) errors for connection close - try - { - cout << "aborting transaction..." << flush; - transaction.abort(); - - cout << "closing database..." << flush; - database.close(); - - cout << "done." << endl; - } - catch(r_Error &e) - { - cout << "Error closing connection: " << e.what() << endl << flush; - } - - return 0; -} - -/* - * end of query2.cc - */ |