0000412: Set pointer to NULL in JEventLoop::GetSingle if 0 values.

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0000412

JANA

Feature Request

public

2014-07-18 08:19

2014-07-18 08:30

Reporter

davidl

Assigned To

davidl

Priority

normal

Severity

minor

Reproducibility

have not tried

Status

resolved

Resolution

fixed

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OS Version

Summary

0000412: Set pointer to NULL in JEventLoop::GetSingle if 0 values.

Description

From an e-mail from Paul Mattione on June 7, 2014

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In JEventLoop::GetSingle(), could you set the pointer to NULL if the vector is empty, and only throw an exception if the size is >= 2? (Current is to throw if size != 1). I've been using GetSingle() for DMCThrownMatching, and checking for NULL after the function call, but it throws on (CLAS) experimental data.

Thanks.

- Paul
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Notes
(0000592) davidl (administrator) 2014-07-18 08:30	This was fixed in svn revision 2046 and will appear in JANA 0.7.2 The code now sets the value of "t" to NULL in all cases where there is not exactly one object of the requested type. It also has a 3rd parameter that can be used to disable throwing an exception if N!=1.

Issue History
Date Modified	Username	Field	Change
2014-07-18 08:19	davidl	New Issue
2014-07-18 08:30	davidl	Note Added: 0000592
2014-07-18 08:30	davidl	Status	new => resolved
2014-07-18 08:30	davidl	Resolution	open => fixed
2014-07-18 08:30	davidl	Assigned To	=> davidl