Grouper Users - Open Discussion List

["Biernath, Jutta" <>]

Hi, Chris,

Grouper Version 2.2

Source File: 
grouper.edu.internet2.middleware.grouper.app.loader.db.GrouperLoaderResultset
=========================================================================


Assignment of sourceIdCol: 
------------------------------------
(line 99)    
String sourceIdCol = null;
(line 130-134)
String subjectSourceId = (String) row.getCell(
            GrouperLoaderResultset.SUBJECT_SOURCE_ID_COL, false);
        if (!StringUtils.isBlank(subjectSourceId)) {
          sourceIdCol = GrouperLoaderResultset.SUBJECT_SOURCE_ID_COL;
        }
### --> sourceIdCol stays null


Assignment of sourceId:
-------------------------------
(line 136)    
String sourceId = null;
(line 138-143)
      if (!StringUtils.isBlank(sourceIdCol)) {
        sourceId = (String) row.getCell(
            GrouperLoaderResultset.SUBJECT_SOURCE_ID_COL, false);
      }
      //default this to what is in the config file
      sourceId = StringUtils.defaultString(sourceId, defaultSubjectSourceId);
### -->sourceId gets default value


subjectIdsOrIdentifiers does not get any value:
---------------------------------------------------------
(line 93)
    Set<String> subjectIdsOrIdentifiers = new HashSet<String>();
(line 146-157)
if (!StringUtils.isBlank(sourceId)) {
        Set<String> subjectIdsOrIdentifiersForSource = 
sourceToSubjectIdsOrIdentifiers.get(sourceId);
        //lazy load for source
        if (subjectIdsOrIdentifiersForSource == null) {
          subjectIdsOrIdentifiersForSource = new HashSet<String>();
          sourceToSubjectIdsOrIdentifiers.put(sourceId, 
subjectIdsOrIdentifiersForSource);
        }
        subjectIdsOrIdentifiersForSource.add(subjectIdOrIdentifer);
      } else {
        //no source, just keep track of identifier
        subjectIdsOrIdentifiers.add(subjectIdOrIdentifer);
      }
### --> sourceId has a value, so I never get into else branch --> 
subjectIdsOrIdentifiers will never get any values; It stays an empty HashMap


subjectIdOrIdentifierToSubject does not get any value:
--------------------------------------------------------------------
(line 194)
Map<String, Subject> subjectIdOrIdentifierToSubject = null;
(line 196-207)
    if (GrouperUtil.length(subjectIdsOrIdentifiers) > 0) {
      //what are they?
      if (StringUtils.equals(subjectIdCol, 
GrouperLoaderResultset.SUBJECT_ID_COL)) {
        subjectIdOrIdentifierToSubject = 
SubjectFinder.findByIds(subjectIdsOrIdentifiers);
      } else if (StringUtils.equals(subjectIdCol, 
GrouperLoaderResultset.SUBJECT_IDENTIFIER_COL)) {
        subjectIdOrIdentifierToSubject = 
SubjectFinder.findByIdentifiers(subjectIdsOrIdentifiers);
      } else if (StringUtils.equals(subjectIdCol, 
GrouperLoaderResultset.SUBJECT_ID_OR_IDENTIFIER_COL)) {
        subjectIdOrIdentifierToSubject = 
SubjectFinder.findByIdsOrIdentifiers(subjectIdsOrIdentifiers);
      } else {
        throw new RuntimeException("Not expecting subjectIdCol: " + 
subjectIdCol);
      }
    }
### --> subjectIdsOrIdentifiers is still empty, so I don't get into 
if-clause. But just here in this if-clause the values are assigned to 
subjectIdOrIdentifierToSubject --> there are never values assigned to 
subjectIdOrIdentifierToSubject; It stays null.


Null pointer exception
----------------------------
(line 215-226)
      if (!StringUtils.isBlank(sourceIdCol)) {
        String sourceId = (String)row.getCell(sourceIdCol, false);
        if (!StringUtils.isBlank(sourceId)) {
          Map<String, Subject> localSubjectIdOrIdentifierToSubject = 
sourceToSubjectIdOrIdentifierToSubject.get(sourceId);
          if (localSubjectIdOrIdentifierToSubject != null) {
            subject = 
localSubjectIdOrIdentifierToSubject.get(subjectIdOrIdentifier);
          }
        }
      } else {
        //get the subject from the subjectId map
        subject = subjectIdOrIdentifierToSubject.get(subjectIdOrIdentifier);
      }
### --> StringUtils.isBlank(sourceIdCol) is true if sourceIdCol is null or 
empty. My sourceIdCol is still null, see above, so I get into the else branch 
here. But in the else branch the get-Method tries to get a value from 
subjectIdOrIdentifierToSubject, which is still null --> a null pointer 
exception occurs.


Regards,

Jutta






--------------------
Jutta Biernath
Freie Universität Berlin
Zentraleinrichtung für Datenverarbeitung (ZEDAT)
Identity & Customer Management, FUDIS
Fabeckstr. 32
14195 Berlin
Tel. +49 30 838-75090
Fax +49 30 838-475090

-----Ursprüngliche Nachricht-----
Von: Hyzer, Chris 
[mailto:]
 
Gesendet: Freitag, 20. Mai 2016 18:27
An: Biernath, Jutta 
<>;
 

Betreff: RE: [grouper-users] Bug found in 
GrouperLoaderResultSet.bulkLookupSubjects()

Can you please give source file names and when referencing a source line give 
the line number and copy the source line too?  Thanks, Chris

-----Original Message-----
From: 

 
[mailto:]
 On Behalf Of Jutta Biernath
Sent: Friday, May 20, 2016 7:04 AM
To: 

Subject: [grouper-users] Bug found in 
GrouperLoaderResultSet.bulkLookupSubjects()

Hi,

after upgrading Grouper from 2.1.5 to 2.2.2 I have encountered several 
NullPointerExceptions when running loadergroups. I have carefully analysed 
the source code because I wanted to understand the cause. This is what I 
found:

I have several loadergroups, each one with another view as resultset. Some of 
the views have a source_id column, others haven't (those which don't build a 
group hierarchy).

Now the NullPointerException occured with the loadergroups with resultsets 
without source_id column. This is what happened:

- I have a default source id set in the loader properties file, so this is <> 
null; this value is assigned to the variable sourceId
- However I don't have a source column in the resultset, what means that the 
variable sourceIdCol stays null
- Because sourceId has a valid value, the variable subjectIdsOrIdentifiers 
stays null; there are no values assigned to it. 
- Because subjectIdsOrIdentifiers is null, also 
subjectIdOrIdentifierToSubject is null.
- In ln. 218 however there is an if/else command that checks if sourceIdCol 
is blank or not. My sourceIdCol is still null, so i get into the the else 
branch.
But there is a get()-Method on subjectIdOrIdentifierToSubject, which was 
never filled, see above --> a NullPointerException happens. Probably you 
wanted to check if sourceId was blank, not sourceIdCol.

Until this is fixed I will work with a workaround, giving all of my views a 
column for the subject source. I just wanted to inform you, I think this is 
relevant.

Regards,
Jutta Biernath
Freie Universität Berlin