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#pragma once
#include <Processors/ISource.h>
namespace DB
{
/// This source is throwing exception at the first attempt to read from it.
/// Can be used as a additional check that pipeline (or its part) is never executed.
class ThrowingExceptionSource : public ISource
{
public:
using CallBack = std::function<Exception()>;
explicit ThrowingExceptionSource(Block header, CallBack callback_)
: ISource(std::move(header))
, callback(std::move(callback_))
{}
String getName() const override { return "ThrowingExceptionSource"; }
protected:
Chunk generate() override
{
throw callback();
}
CallBack callback;
};
}
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