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Annotation of parser3/src/classes/nothing.C, revision 1.4

1.1       parser      1: /** @file
                      2:        Parser: @b nothing parser class.
                      3: 
                      4:        Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
                      5: 
                      6:        Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
                      7: 
1.4     ! parser      8:        $Id: nothing.C,v 1.3 2001/05/21 17:17:11 parser Exp $
1.1       parser      9: */
                     10: 
                     11: #include "classes.h"
                     12: #include "pa_request.h"
                     13: #include "pa_vint.h"
                     14: #include "pa_vdouble.h"
1.2       parser     15: #include "pa_vnothing.h"
1.3       parser     16: #include "pa_sql_connection.h"
1.1       parser     17: 
                     18: // defines
                     19: 
                     20: #define NOTHING_CLASS_NAME "nothing"
                     21: 
                     22: // class
                     23: 
                     24: class MNothing : public Methoded {
                     25: public:
                     26:        MNothing(Pool& pool);
                     27: public: // Methoded
1.4     ! parser     28:        bool used_directly() { return true; }
1.1       parser     29: };
                     30: 
                     31: // methods
                     32: 
                     33: static void _int(Request& r, const String&, MethodParams *) {
                     34:        Pool& pool=r.pool();
                     35:        VInt *vunknown=static_cast<VInt *>(r.self);
                     36:        Value& value=*new(pool) VInt(pool, vunknown->as_int());
                     37:        r.write_no_lang(value);
                     38: }
                     39: 
                     40: static void _double(Request& r, const String&, MethodParams *) {
                     41:        Pool& pool=r.pool();
                     42:        VInt *vunknown=static_cast<VInt *>(r.self);
                     43:        Value& value=*new(pool) VDouble(pool, vunknown->as_double());
                     44:        r.write_no_lang(value);
                     45: }
                     46: 
1.3       parser     47: static void _sql(Request& r, const String& method_name, MethodParams *params) {
                     48:        Pool& pool=r.pool();
                     49: 
                     50:        if(!r.connection)
                     51:                PTHROW(0, 0,
                     52:                        &method_name,
                     53:                        "without connect");
                     54: 
                     55:        Value& statement=params->get_junction(0, "statement must be code");
                     56: 
                     57:        Temp_lang temp_lang(r, String::UL_SQL);
                     58:        const String& statement_string=r.process(statement).as_string();
                     59:        const char *statement_cstr=
                     60:                statement_string.cstr(String::UL_UNSPECIFIED, r.connection);
                     61:        unsigned int sql_column_count; SQL_Driver::Cell *sql_columns;
                     62:        unsigned long sql_row_count; SQL_Driver::Cell **sql_rows;
                     63:        bool need_rethrow=false; Exception rethrow_me;
                     64:        PTRY {
                     65:                r.connection->query(
                     66:                        statement_cstr, 0, 0,
                     67:                        &sql_column_count, &sql_columns,
                     68:                        &sql_row_count, &sql_rows);
                     69:        }
                     70:        PCATCH(e) { // connect/process problem
                     71:                rethrow_me=e;  need_rethrow=true;
                     72:        }
                     73:        PEND_CATCH
                     74:        if(need_rethrow)
                     75:                PTHROW(rethrow_me.type(), rethrow_me.code(),
                     76:                        &statement_string, // setting more specific source [were url]
                     77:                        rethrow_me.comment());
                     78: 
                     79:        // there are some result rows, which is wrong
                     80:        if(sql_row_count)
                     81:                PTHROW(0, 0,
                     82:                        &statement_string,
                     83:                        "must not return result");
                     84: }
                     85: 
1.1       parser     86: // constructor
                     87: 
                     88: MNothing::MNothing(Pool& apool) : Methoded(apool) {
                     89:        set_name(*NEW String(pool(), NOTHING_CLASS_NAME));
                     90: 
                     91: 
                     92:        // ^nothing.int[]
                     93:        add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
                     94: 
                     95:        // ^nothing.double[]
                     96:        add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
1.3       parser     97: 
                     98:        // ^sql[query]
1.4     ! parser     99:        add_native_method("sql", Method::CT_STATIC, _sql, 1, 1);
1.1       parser    100: }
                    101: 
                    102: // global variable
                    103: 
1.3       parser    104: Methoded *nothing_class;
1.1       parser    105: 
                    106: // creator
                    107: 
                    108: Methoded *MNothing_create(Pool& pool) {
1.3       parser    109:        return nothing_class=new(pool) MNothing(pool);
1.1       parser    110: }