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FuncTaskBase.cs
52 lines | 1.5 KiB | text/x-csharp | CSharpLexer
/ Implab / FuncTaskBase.cs
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using System;
namespace Implab {
public class FuncTaskBase<TResult> : AbstractTask<TResult> {
readonly Func<Exception, TResult> m_cancel;
readonly Func<Exception, TResult> m_error;
protected FuncTaskBase( Func<Exception, TResult> error, Func<Exception, TResult> cancel, bool autoCancellable) {
m_error = error;
m_cancel = cancel;
if (autoCancellable)
CancellationRequested(CancelOperation);
}
public void Reject(Exception error) {
Safe.ArgumentNotNull(error, "error");
if (LockCancelation())
HandleErrorInternal(error);
}
protected void HandleErrorInternal(Exception error) {
if (m_error != null) {
try {
SetResult(m_error(error));
} catch(Exception err) {
SetErrorInternal(err);
}
} else {
SetErrorInternal(error);
}
}
public override void CancelOperation(Exception reason) {
if (LockCancelation())
HandleCancelInternal(reason);
}
protected void HandleCancelInternal(Exception reason) {
if (m_cancel != null) {
try {
SetResult(m_cancel(reason));
} catch (Exception err) {
SetErrorInternal(err);
}
} else {
SetCancelledInternal(reason);
}
}
}
}