COR-329 : New implementation of the MSExcelDocumentReader using the Even...

[fdrouet]

New implementation of the MSExcelDocumentReader using the Event User Model approach to have * lower memory footprint with big Excel files*.

The new Reader follow the following rules :

we only index :

• a maximum of 5000 cells starting from the first tab
• after 5000 cells processed, we abort the parsing

we KEEP only the following data :

• tab name
• cells with string with a length > 2 chars

we SKIP the following data :

• cells with string with a length < 3 chars
• cells with number (date formatted or simple number)
• cells with blank value
• cells with boolean or error value
• cells with formula

New implementation of the MSXExcelDocumentReader using the Event User Model approach to have lower memory footprint with big Excel files.

The new Reader follow the following rules :

we only index :

• a maximum of 5000 cells starting from the first tab
• a maximum of 5 tabs
• a maximum of 1000 cells processed per tab

we KEEP only the following data :

• tab name
• cells with string with a length > 2 chars

we SKIP the following data :

• cells with string with a length < 3 chars
• cells with number (date formatted or simple number)
• cells with blank value
• cells with boolean or error value
• cells with formula

New implementation of the POIPropertiesReader.readDCProperties(...) for ooxml documents (MS 2007 office file formats) to have lower memory footprint with big Excel (xlsx) or Word (docx) or Power Point (pptx) files.

[fdrouet]

PR dropped and replace by #29