/// <summary>
/// Executes a db command and fills in a list of objects with the result data
/// </summary>
/// <typeparam name="ReturnType">The type of object to return</typeparam>
/// <param name="objectType">The type of object to return.</param>
/// <param name="command">The command to execute</param>
/// <returns></returns>
protected virtual IEnumerable <ReturnType> ExecuteCommandLoadList <ReturnType>(Type objectType, IDbCommand command)
{
DatabaseTypeInfo ti = Connection.CommandGenerator.TypeParser.GetTypeInfo(objectType);
using (IQueryData dt = ExecuteCommands.ExecuteCommandQuery(command, Connection))
{
if (dt.QuerySuccessful)
{
foreach (IQueryRow row in dt)
{
ReturnType toAdd;
if (objectType.IsSystemType())
{
toAdd = (ReturnType)Connection.CLRConverter.ConvertToType(row.GetDataForRowField(0), typeof(ReturnType));
}
else
{
toAdd = (ReturnType)BuildObject(row, ti);
}
yield return(toAdd);
}
}
}
}
public async Task <bool> IsNew(object item)
{
using (IQueryData qd = await Task.Run(() => {
IDbCommand cmd = Connection.CommandGenerator.GetSelectCommand(item, false);
return(ExecuteCommands.ExecuteCommandQuery(cmd, Connection));
}))
{
var enumerator = qd.GetEnumerator();
enumerator.MoveNext();
return(enumerator.Current == null);
}
}
/// <summary>
/// Determines if an object already exists in the data store, based on the primary key
/// </summary>
/// <param name="item">The object to check</param>
/// <returns></returns>
public virtual bool IsNew(object item)
{
IDbCommand cmd = Connection.CommandGenerator.GetSelectCommand(item);
using (IQueryData qd = ExecuteCommands.ExecuteCommandQuery(cmd, Connection))
{
var enumerator = qd.GetEnumerator();
enumerator.MoveNext();
return(enumerator.Current == null);
}
}
protected virtual bool ProcessCommand(Func <IQueryData, bool> OnDone, IDbCommand command, bool FailIfNoRecords)
{
using (IQueryData dt = ExecuteCommands.ExecuteCommandQuery(command, Connection))
{
if (dt.QuerySuccessful)
{
bool records = OnDone(dt);
if (FailIfNoRecords)
{
return(records);
}
}
return(true);
}
}
public async Task <IEnumerable <ReturnType> > ExecuteCommandLoadList <ReturnType>(Type objectType, IDbCommand command)
{
List <ReturnType> toReturn = new List <ReturnType>();
using (IQueryData dt = await Task.Run(() => ExecuteCommands.ExecuteCommandQuery(command, Connection)))
{
if (dt.QuerySuccessful)
{
DatabaseTypeInfo ti = TypeInformationParser.GetTypeInfo(objectType);
foreach (IQueryRow row in dt)
{
if (objectType.IsSystemType())
{
toReturn.Add((ReturnType)Connection.CLRConverter.ConvertToType(row.GetDataForRowField(0), typeof(ReturnType)));
}
else
{
toReturn.Add((ReturnType)await BuildObjectAsync(row, ti));
}
}
}
return(toReturn);
}
}
/// <summary>
/// Executes a command
/// </summary>
/// <param name="command">The command to execute</param>
/// <returns></returns>
public virtual IQueryData ExecuteQuery(IDbCommand command)
{
return(ExecuteCommands.ExecuteCommandQuery(command, Connection));
}
