/// <summary>
/// Notifies the observer of a new value in the sequence. It's best to override Dispatch or TreatRow than this method because this method contains pipelining logic.
/// </summary>
public override void Trigger()
{
CountTreated++;
try
{
IEnumerator fList = null;
if (_strm != null)
{
using (StreamReader reader = new StreamReader(_strm))
{
fList = FluentFile.For(_type).From(reader).GetEnumerator();
}
}
else if (_strmReader != null)
{
fList = FluentFile.For(_type).From(_strmReader).GetEnumerator();
}
else if (_filename != null)
{
fList = FluentFile.For(_type).From(_filename).GetEnumerator();
}
IterateElements(fList);
}
catch (Exception ex)
{
log4net.LogManager.GetLogger(this.GetType()).Error("Operation error", ex);
Observers.PropagateOnError(ex);
}
Completed = true;
Observers.PropagateOnCompleted();
}
public override IEnumerable <Row> Execute(IEnumerable <Row> rows)
{
using (FileEngine file = FluentFile.For <UserAddressRecord>().From(filePath))
{
foreach (object obj in file)
{
yield return(Row.FromObject(obj));
}
}
}
public override IEnumerable <Row> Execute(IEnumerable <Row> rows)
{
using (var file = FluentFile.For <DataRecord>().From(FilePath))
{
foreach (var obj in file)
{
yield return(Row.FromObject(obj));
}
}
}
protected override async Task ExecuteYield(IAsyncEnumerable <Row> rows,
AsyncEnumerator <Row> .Yield yield,
CancellationToken cancellationToken = default)
{
using (FileEngine file = FluentFile.For <UserRecord>().From("users.txt"))
{
foreach (object obj in file)
{
await @yield.ReturnAsync(Row.FromObject(obj));
}
}
}
public override IEnumerable <Row> Execute(IEnumerable <Row> rows)
{
using (FileEngine file = FluentFile.For <FlatFile>().From(FilePath))
{
int i = 0;
foreach (FlatFile fileRow in file)
{
yield return(Row.FromObject(fileRow));
i++;
}
}
}
public override IEnumerable <Row> Execute(IEnumerable <Row> rows)
{
FluentFile engine = FluentFile.For <UserFullRecord>();
engine.HeaderText = "Id\tName\tAddress";
using (FileEngine file = engine.To(filePath))
{
foreach (Row row in rows)
{
file.Write(row.ToObject <UserFullRecord>());
//pass through rows if needed for another later operation
yield return(row);
}
}
}
/// <summary>
/// Executes this operation
/// </summary>
/// <param name="rows">The rows.</param>
/// <returns></returns>
public override IEnumerable <Row> Execute(IEnumerable <Row> rows)
{
FluentFile engine = FluentFile.For <UserRecord>();
engine.HeaderText = "Id\tName\tEmail";
using (FileEngine file = engine.To("users.txt"))
{
foreach (Row row in rows)
{
UserRecord record = new UserRecord();
record.Id = (int)row["id"];
record.Name = (string)row["name"];
record.Email = (string)row["email"];
file.Write(record);
}
}
yield break;
}
protected override async Task ExecuteYield(IAsyncEnumerable <Row> rows, AsyncEnumerator <Row> .Yield yield,
CancellationToken cancellationToken = default)
{
FluentFile engine = FluentFile.For <UserRecord>();
engine.HeaderText = "Id\tName\tEmail";
using (FileEngine file = engine.To("users.txt"))
{
await rows.ForEachAsync(row =>
{
UserRecord record = new UserRecord();
record.Id = (int)row["id"];
record.Name = (string)row["name"];
record.Email = (string)row["email"];
file.Write(record);
}, cancellationToken);
}
@yield.Break();
}
/// <summary>
/// Initialize the file engine
/// </summary>
/// <returns>initialized engine</returns>
public FileEngine InitializeEngine()
{
if (Engine != null)
{
return(Engine);
}
if (this.Stream != null && _innerstrmwriter == null)
{
_innerstrmwriter = new StreamWriter(this.Stream);
}
var ff = FluentFile.For <T>();
if (PrepareFluentFile != null)
{
PrepareFluentFile(ff);
}
if (_innerstrmwriter != null)
{
Engine = ff.To(_innerstrmwriter);
}
else if (Writer != null)
{
Engine = ff.To(Writer);
}
else if (FileName != null)
{
Engine = ff.To(FileName);
}
if (Engine == null)
{
throw new InvalidOperationException("File write is not initialized appropriately");
}
return(Engine);
}
