Files
lms/database/SqlQuery.cpp
T

182 lines
3.2 KiB
C++

#include <algorithm>
#include <boost/foreach.hpp>
#include <sstream>
#include <stdexcept>
#include "SqlQuery.hpp"
WhereClause&
WhereClause::And(const WhereClause& otherClause)
{
if (!otherClause._clause.empty()) {
if (!_clause.empty())
_clause += " AND ";
_clause += "(" + otherClause._clause + ")";
// Add associated bind args
BOOST_FOREACH(const std::string& otherBindArg, otherClause._bindArgs) {
_bindArgs.push_back(otherBindArg);
}
}
return *this;
}
WhereClause&
WhereClause::Or(const WhereClause& otherClause)
{
if (!otherClause._clause.empty()) {
if (!_clause.empty())
_clause += " OR ";
_clause += "(" + otherClause._clause + ")";
// Add associated bind args
BOOST_FOREACH(const std::string& otherBindArg, otherClause._bindArgs) {
_bindArgs.push_back(otherBindArg);
}
}
return *this;
}
std::string
WhereClause::get(void) const
{
if (!_clause.empty())
return "WHERE " + _clause;
else
return "";
}
WhereClause&
WhereClause::bind(const std::string& bindArg)
{
if (_bindArgs.size() >= static_cast<std::size_t>( std::count(_clause.begin(), _clause.end(), '?') ))
throw std::runtime_error("Too many bind args!");
_bindArgs.push_back(bindArg);
return *this;
}
InnerJoinClause::InnerJoinClause(const std::string& clause)
:_clause(clause)
{
}
InnerJoinClause&
InnerJoinClause::And(const InnerJoinClause& clause)
{
if (!_clause.empty())
_clause += " ";
_clause += clause._clause;
return *this;
}
SelectStatement::SelectStatement(const std::string& statement)
{
And(statement);
}
SelectStatement&
SelectStatement::And(const std::string& statement)
{
_statement.push_back(statement);
_statement.sort();
_statement.unique();
return *this;
}
std::string
SelectStatement::get() const
{
std::string res = "SELECT ";
for (std::list<std::string>::const_iterator it = _statement.begin(); it != _statement.end(); ++it)
{
if (it != _statement.begin())
res += ",";
res += *it;
}
return res;
}
GroupByStatement&
GroupByStatement::And(const GroupByStatement& statement)
{
if( _statement.empty() && !statement._statement.empty())
_statement = "GROUP BY ";
else if (!_statement.empty() && !statement._statement.empty())
_statement += ",";
_statement += statement._statement;
return *this;
}
FromClause::FromClause(const std::string& clause)
{
_clause.push_back(clause);
}
FromClause&
FromClause::And(const FromClause& clause)
{
BOOST_FOREACH(const std::string fromClause, clause._clause) {
_clause.push_back(fromClause);
}
_clause.sort();
_clause.unique();
return *this;
}
std::string
FromClause::get() const
{
std::ostringstream oss;
if (!_clause.empty())
{
oss << "FROM ";
for (std::list<std::string>::const_iterator it = _clause.begin(); it != _clause.end(); ++it) {
if (it != _clause.begin())
oss << ",";
oss << *it;
}
}
return oss.str();
}
std::string
SqlQuery::get(void) const
{
std::ostringstream oss;
oss << _selectStatement.get();
if (!_fromClause.get().empty())
oss << " " << _fromClause.get();
if (!_innerJoinClause.get().empty())
oss << " " << _innerJoinClause.get();
if (!_whereClause.get().empty())
oss << " " << _whereClause.get();
if (!_groupByStatement.get().empty())
oss << " " << _groupByStatement.get();
return oss.str();
}