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Subject: [Bug 56482] New: Excel 2010 format workbook saved as 2003 format
 with more than three Conditional Formatting Rules per record causes
 java.lang.IllegalArgumentException
Date: Fri, 02 May 2014 12:34:04 +0000
Message-ID: <bug-56482-47293@https.issues.apache.org/bugzilla/>
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https://issues.apache.org/bugzilla/show_bug.cgi?id=56482

            Bug ID: 56482
           Summary: Excel 2010 format workbook saved as 2003 format with
                    more than three Conditional Formatting Rules per
                    record causes java.lang.IllegalArgumentException
           Product: POI
           Version: 3.10
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HSSF
          Assignee: dev@poi.apache.org
          Reporter: paucoma@gmail.com

Created attachment 31587
  --> https://issues.apache.org/bugzilla/attachment.cgi?id=31587&action=edit
Multi-Conditional-Formatting Rules saved as Old Excel Format

It is possible to **create a file in Excel 2007, Excel 2010, LibreOffice Calc,
etc... with more than 3 conditional formatting rules per cell** and then **Save
it in the Excel 2003 format** , preserving those defined rules.

When POI detects the pre 2007 Excel format, it opens it with HSSFWorkbook and
all the rest... and when it bumps into more than 3 rules defined it throws an
exception.

If this same file is opened in LibreOffice for example and saved in 2007/2010
format and then opened again with the workbookFactory it creates an
XSSFWorkbook and everything works ok.

  ---

** Example Files **

[Multi-Conditional-Formatting Rules saved as Old Excel Format
XLS](http://www.filedropper.com/mcfrsaxls)
[Multi-Conditional-Formatting Rules saved as New Excel Format
XLSX](http://www.filedropper.com/mcfrsaxlsx)

  ---

In [this blog post from excel support
group](http://office.microsoft.com/en-us/excel-help/create-flexible-effective-conditional-formats-in-excel-2007-HA010217629.aspx)
It states: 

  > In previous versions of Excel, you could have a maximum of three
conditional formats. There's no such limit in Office Excel 2007; you may have
as many conditional formats as you like.

  - Because **pre-2007/2010** Excel files were limited to 3 rules, the library
object is also limited to 3. The [CFRecordsAggregate
class](http://poi.apache.org/apidocs/org/apache/poi/hssf/record/aggregates/CFRecordsAggregate.html)
states in its description:

  > CFRecordsAggregate - aggregates Conditional Formatting records
CFHeaderRecord and number of **up to three CFRuleRecord records** together to
simplify access to them.

  ---

Exception output:

java.lang.IllegalArgumentException: No more than 3 rules may be specified
    at
org.apache.poi.hssf.record.aggregates.CFRecordsAggregate.<init>(CFRecordsAggregate.java:58)
    at
org.apache.poi.hssf.record.aggregates.CFRecordsAggregate.createCFAggregate(CFRecordsAggregate.java:95)
    at
org.apache.poi.hssf.record.aggregates.ConditionalFormattingTable.<init>(ConditionalFormattingTable.java:49)
    at org.apache.poi.hssf.model.InternalSheet.<init>(InternalSheet.java:143)
    at
org.apache.poi.hssf.model.InternalSheet.createSheet(InternalSheet.java:121)
    at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:311)
    at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:264)
    at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:199)
    at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:342)
    at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:323)
    at
org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:76)

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