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pqxxobject/insert_query.cc

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00001 // database insert query class                                   -*- C++ -*-
00002 // $Id: insert_query.cc,v 1.2 2004/04/02 22:44:54 roger Exp $
00003 //
00004 // Copyright (C) 2003  Roger Leigh <rleigh@debian.org>
00005 //
00006 //
00007 //  All rights reserved.
00008 //
00009 //  Redistribution and use in source and binary forms, with or without
00010 //  modification, are permitted provided that the following conditions
00011 //  are met:
00012 //
00013 //  * Redistributions of source code must retain the above copyright
00014 //    notice, this list of conditions and the following disclaimer.
00015 //  * Redistributions in binary form must reproduce the above
00016 //    copyright notice, this list of conditions and the following
00017 //    disclaimer in the documentation and/or other materials provided
00018 //    with the distribution.
00019 //  * Neither the name of the author, nor the names of other
00020 //    contributors may be used to endorse or promote products derived
00021 //    from this software without specific prior written permission.
00022 //
00023 //  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
00024 //  CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
00025 //  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
00026 //  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00027 //  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
00028 //  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00029 //  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00030 //  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00031 //  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
00032 //  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
00033 //  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
00034 //  THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00035 //  SUCH DAMAGE.
00036 //
00038 
00039 #include <sstream>
00040 
00041 #include <pqxxobject/insert_query.h>
00042 
00043 using namespace pqxxobject;
00044 
00045 insert_query::insert_query():
00046   pqxxobject::query(),
00047   table_name(),
00048   field_list()
00049 {
00050 }
00051 
00052 insert_query::insert_query(const std::string& table):
00053   pqxxobject::query(),
00054   table_name(table),
00055   field_list()
00056 {
00057 }
00058 
00059 insert_query::insert_query(const insert_query& rhs):
00060   pqxxobject::query(*this),
00061   table_name(rhs.table_name),
00062   field_list(rhs.field_list)
00063 {
00064 }
00065 
00066 insert_query::~insert_query()
00067 {
00068 }
00069 
00070 void
00071 insert_query::remove(const pqxxobject::field_base& field)
00072 {
00073   for (std::list<field_value>::iterator iter = field_list.begin();
00074        iter != field_list.end();
00075        ++iter)
00076     {
00077       if (iter->first == field.get_column_name())
00078         {
00079           iter = field_list.erase(iter);
00080         }
00081     }
00082 }
00083 
00084 std::string insert_query::str() const
00085 {
00086   // Erase the previous query (if any).
00087   std::ostringstream qs;
00088   // Construct the new query.
00089   if (field_list.size() > 0)
00090     {
00091       qs << "INSERT INTO " << table_name << '(';
00092       for (std::list<field_value>::const_iterator iter = field_list.begin();
00093            iter != field_list.end();
00094            ++iter)
00095         {
00096           if (iter != field_list.begin())
00097             qs << ", "; // For all but the first field.
00098           qs << iter->first;
00099         }
00100       qs << ") VALUES (";
00101       for (std::list<field_value>::const_iterator iter = field_list.begin();
00102            iter != field_list.end();
00103            ++iter)
00104         {
00105           if (iter != field_list.begin())
00106             qs << ", "; // For all but the first field.
00107           qs << iter->second;
00108         }
00109       qs << ')';
00110     }
00111   return qs.str();
00112 }

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