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  3. October 2017

Re: POI3.14 Change to AddMergedRegion

Don, to use svn on a source tree, the source tree has to have been fetched
by svn itself.

E.g., to get a copy of the current trunk of the source tree (the mainline
going forward) which is what I did, create a directory (e.g., MyPOI), cd
into the directory, and:

svn co https://svn.apache.org/repos/asf/poi/trunk/

... and it will check it out for you. You can also check out specific
revisions, etc... a world of source control options.

The correct URL for the svn fetch is show at
https://poi.apache.org/subversion.html


On Sun, Oct 22, 2017 at 4:57 PM, Don Brown <DBrown@xxxxxxxxxx> wrote:

Thank you Jack, I appreciate you providing the steps you followed to get
the answer.

So I have tried to replicate this ...

I downloaded the poi 3.14 source and extracted it.

I downloaded and installed SVN on my laptop.

I tried to use the svn changelist command to see the list of changes but I
get the error ... is not a working copy

So I am guessing (I have never used svn before) that I would have to
import the source into a repository first ?

Do you have a basic or rudimentary set of svn steps to get to the point of
being able to view the changes ?

I did however navigate my way to the HSSFSheet.java source and found the
comment - * @throws IllegalArgumentException if region contains fewer than
2 cells

Muchly appreciate your assistance



Don Brown





From: "Jack Woehr" <jwoehr@xxxxxxxxxxxxxxxxxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Date: 23/10/2017 02:25 AM
Subject: Re: POI3.14 Change to AddMergedRegion
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



And here, using svn log against the source file, is your answer, methinks:

------------------------------------------------------------------------
r1730991 | onealj | 2016-02-17 18:33:14 -0700 (Wed, 17 Feb 2016) | 1 line

bug 56345: reject single-cell merged regions


On Sun, Oct 22, 2017 at 10:15 AM, Jack Woehr <
jwoehr@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:

And if you want the change history of org.apache.poi.hssf.usermodel.
HSSFSheet just check out the source and use the svn commands to view
file
history.

On Sun, Oct 22, 2017 at 10:13 AM, Jack Woehr
<jwoehr@absolute-performance.
com> wrote:

From the Javadocs:


- addMergedRegion

public int addMergedRegion(CellRangeAddress <
https://poi.apache.org/apidocs/org/apache/poi/ss/
util/CellRangeAddress.html
region)

Adds a merged region of cells on a sheet.
Specified by:addMergedRegion
<
https://poi.apache.org/apidocs/org/apache/poi/ss/usermodel/Sheet.html#
addMergedRegion-org.apache.poi.ss.util.CellRangeAddress-
in
interface Sheet
<
https://poi.apache.org/apidocs/org/apache/poi/ss/usermodel/Sheet.html>
Parameters:region - to mergeReturns:index of this regionThrows:
java.lang.IllegalArgumentException - if region contains fewer than 2
cellsjava.lang.IllegalStateException - if region intersects with a
multi-cell array formulajava.lang.IllegalStateException - if region
intersects with an existing region on this sheet


On Sun, Oct 22, 2017 at 9:56 AM, Jack Woehr <
jwoehr@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Read the source code?

On Sat, Oct 21, 2017 at 10:27 PM, Don Brown <DBrown@xxxxxxxxxx> wrote:

System is at V7R2 and running Java 7

I upgraded poi classes from 3.8 to 3.14 and most things worked fine.

We are generating some very large spreadsheets and the streaming
function
available at this version is great!

A job crashed today with the java error ...

Message . . . . : Java exception received when calling Java method.
Cause . . . . . : RPG procedure SS_MERGE in program XAPSW/HSSFR4
received
Java exception "java.lang.IllegalArgumentException: Merged region
C12
must
contain 2 or more cells" when calling method "addMergedRegion" with
signature "(Lorg.apache.poi.ss.util.CellRangeAddress;)I" in class
"org.apache.poi.ss.usermodel.Sheet". Recovery . . . : Contact
the
person
responsible for program maintenance to determine the cause of the
problem.

So this is telling me there is a problem with the cell range for the
merge
function.

Digging further in the program dump I find that is actually the case
and
the program is trying to merge a single cell.

Ok I can correct that with a check in the program but this code
worked
at
poi 3.8

So there must have been a change in the java class to error if the
region
was for a single cell or with the reading I have been doing I think
if
you
want to merge a single cell you have to specify the region
differently.
(Why merge a single cell or what is the result of merging a single
cell
-
I have no idea)

How can I find the validation rules for the AddMergedRegion or when
this
was changed - searching the poi site is not yielding the information
I
was
hoping for - like a list of changes for each method by release.

Any suggestions welcomed.


Don Brown


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