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/*
Copyright (C) 2007-2010 Tuomas Suutari <thsuut@utu.fi>
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program (see the file COPYING); if not, write to the
Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301 USA.
*/
#ifndef SQLDB_CREATESTATEMENTGENERATOR_H
#define SQLDB_CREATESTATEMENTGENERATOR_H
#include "DatabaseSchema.h"
#include <memory>
#include <list>
#include <string>
namespace SQLDB
{
namespace Schema
{
using std::list;
using std::string;
/** Generates SQL create statements from a database schema.
*
* With this interface it is possible to create SQL database
* from a DatabaseSchema object in the ame way regardless of
* the DBMS in use.
*/
class CreateStatementGenerator
{
public:
typedef std::auto_ptr<CreateStatementGenerator> APtr;
virtual ~CreateStatementGenerator() {}
/** Generate SQL commands for creating a database.
*
* Execute the returned commands to create a new database
* with the given schema.
*/
virtual const list<string>&
generateCreateStatements(const DatabaseSchema& schema);
protected:
virtual void
makeTable(const TableSchema& t, list<string>& destList) const = 0;
virtual void
makeIndices(const TableSchema& t,
list<string>& destList) const = 0;
virtual void
makeMetadataInserts(const Identifier& id,
list<string>& destList) const = 0;
private:
list<string> _statementList;
};
/** Basic CreateStatementGenerator implementation.
*
* Useful as a base class for other CSG classes. Just
* overwrite the virtual methods you want to have different
* behaviour.
*/
class BaseCSG: public CreateStatementGenerator
{
public:
virtual ~BaseCSG() {}
protected:
virtual const char*
getTypeKeyword(const Field& f) const;
virtual const char*
getConstraintKeyword(Constraint c) const;
virtual const char*
getPolicyKeyword(Policy p) const;
virtual void
makeTable(const TableSchema& t, list<string>& destList) const;
virtual void
makeIndices(const TableSchema& t, list<string>& destList) const;
virtual void
makeMetadataInserts(const Identifier& id,
list<string>& destList) const;
virtual void
makeField(const Field& f, string& destStr) const;
virtual void
makeFieldSuffix(const Field& f, string& destStr) const;
virtual void
makeFieldType(const Field& f, string& destStr) const;
virtual void
makeFieldConstraints(const Field& f, string& destStr) const;
virtual void
makeFieldDefaultValue(const Field& f, string& destStr) const;
virtual void
makeConstraints(const TableSchema& t, string& destStr) const;
virtual void
makePrimaryKey(const StringTuple& pk, string& destStr) const;
virtual void
makeForeignKey(const ForeignKey& fk, string& destStr) const;
virtual void
makeUniqueIndices(const StringTupleList& ul,
string& destStr) const;
virtual void
makeStringTuple(const StringTuple& st, string& destStr) const;
virtual void
makeNumber(int n, string& destStr) const;
};
}
}
#endif /* SQLDB_CREATESTATEMENTGENERATOR_H */
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