private ISqlStatements ConstructSqlStatements(EntityMapping entityMapping)
{
entityMapping.FreezeMapping();
ISqlStatements sqlStatements;
IStatementSqlBuilder statementSqlBuilder;
switch (entityMapping.Dialect)
{
case SqlDialect.MsSql:
statementSqlBuilder = new MsSqlBuilder(this, entityMapping);
break;
case SqlDialect.MySql:
statementSqlBuilder = new MySqlBuilder(this, entityMapping);
break;
case SqlDialect.PostgreSql:
statementSqlBuilder = new PostgreSqlBuilder(this, entityMapping);
break;
case SqlDialect.SqLite:
statementSqlBuilder = new SqLiteBuilder(this, entityMapping);
break;
default:
throw new NotSupportedException($"Dialect {entityMapping.Dialect} is not supported");
}
sqlStatements = new GenericSqlStatements <TEntity>(statementSqlBuilder);
return(sqlStatements);
}
/// <summary>
/// Returns the sql statements for an entity mapping, or the default one if the argument is null.
/// </summary>
public ISqlStatements GetSqlStatements(EntityMapping entityMapping = null)
{
entityMapping = entityMapping ?? DefaultEntityMapping;
entityMapping.FreezeMapping();
ISqlStatements sqlStatements;
IStatementSqlBuilder statementSqlBuilder;
var originalRegisteredEntityMappings = _registeredEntityMappings;
if (!originalRegisteredEntityMappings.TryGetValue(entityMapping, out sqlStatements))
{
switch (entityMapping.Dialect)
{
case SqlDialect.MsSql:
statementSqlBuilder = new MsSqlBuilder(this, entityMapping);
break;
case SqlDialect.MySql:
statementSqlBuilder = new MySqlBuilder(this, entityMapping);
break;
case SqlDialect.PostgreSql:
statementSqlBuilder = new PostgreSqlBuilder(this, entityMapping);
break;
case SqlDialect.SqLite:
statementSqlBuilder = new SqLiteBuilder(this, entityMapping);
break;
default:
throw new NotSupportedException($"Dialect {entityMapping.Dialect} is not supported");
}
sqlStatements = new GenericSqlStatements <TEntity>(statementSqlBuilder);
// replace the original collection
// rather than using a lock, we prefer the risk of missing a registration or two as they will get captured eventually
_registeredEntityMappings = new Dictionary <EntityMapping, ISqlStatements>(originalRegisteredEntityMappings)
{
[entityMapping] = sqlStatements
};
}
return(sqlStatements);
}