XLConnect News
--------------

1.2.2 2025-05-26
  * Set java.io.tmpdir to the R session temp directory by default
  
1.2.1 2025-04-29
  * Add possibility to configure Apache POI through configurePOI
  * Upgrade POI to 5.4.1

1.2.0 2025-02-17
  * Fix #225 (loading simple logging context factory)
  * Upgrade POI to 5.4.0

1.1.0 2024-08-22
  * Support for worksheet scoped names including [#37](https://github.com/miraisolutions/xlconnect/issues/37)
  * Specify scope of names when writing and reading names, and more
  * New option to receive information on the scope in which a name was found
  * Upgrade POI to 5.3.0

1.0.9 2024-04-17
 * Use com.zaxxer.sparsebits.SparseBitSet instead of java.util.BitSet
 * (#212) fix for loading relative path workbooks under Java 8

1.0.8 2024-01-30
 * Avoid log4j2 error on first use (#172)
 * Upgrade POI to 5.2.5
 * Improvements in XLConnect Java

1.0.7 2023-01-19
  * Fix issue with loadWorkbook (#181)

1.0.6 2022-10-04
  * Fix building of vignettes (#154)
  * Fix java version parsing (#156)
  * Remove java version compatibility upper limit (#165)
  * Upgrade to POI 5.2.3 (#168)
  * Fix setForceFormulaRecalculation / getForceFormulaRecalculation for R >= 4.2.0 (#170)
  * Add overwriteFormulaCells parameter to writeNamedRegion, appendNamedRegion, writeWorkSheet (#173)

1.0.5 2021-09-30
  * Support java 17

1.0.4 2021-07-29
  * Extend support to java 16
  * Download missing dependency for POI 4.1.2
  * Fix java version parsing
  * Fix onLoad failing in Windows

1.0.3 2021-04-09
  * Fix DST related date parsing bug
  * Fix always displaying a failure message when installing on windows
  
1.0.2 2021-02-11
  * Increase compatibility up to java 15
  * Fix missing jar dependency: poi-ooxml-schemas.jar
  * Resolve existing shared jars via package manager instead of via the file system
  * Upgrade java dependencies: commons compress (1.20) and commons codec (1.15)

1.0.1 2020-03-20
  * Add java version check
  
1.0.0 2020-03-19
  * Update to apache POI 4.1.1
  * Download missing dependency jars on installation instead of including them in the package

0.2-15 2018-04-05
  * Upgraded XLConnectJars dependency to version 0.2-15
  * Rely on Java version check from XLConnectJars which now supports Java 10
  
0.2-14 2018-01-23
  * Moved to Apache POI 3.17
  * Upgraded XLConnectJars dependency to version 0.2-14
  * Fixed Java version specification in system requirements
  * Checking Java version at runtime according to CRAN requirements
  * Added existsCellStyle to check for existence of cell styles (#71)
  * Added getOrCreateCellStyle combinator (#14, #71)
  * Updates to vignettes
  
0.2-13 2017-05-10
  * Moved to Apache POI 3.16
  * Performance improvements to setCellStyle for large row/col vectors
  * Added support for setting hyperlinks
  * Fixed issue with missing classes when opening password protected files (#61)

0.2-12 2016-06-23
  * Moved to Apache POI 3.15-beta1
  * Upgraded to Apache Commons Codec 1.10
  * Upgraded XLConnectJars dependency to version 0.2-12
  * Fixed an issue with formula cell evaluation
  * New feature: ability to read password protected files
  * Add additional imports to NAMESPACE as future versions of R will
    only have the base package attached when performing 'R CMD check'
  * Fixed github issue #52: useCachedValues=TRUE shows formulas instead of values
  * Fixed github issue #49: if region has only 2 columns then can't set first
    column as rownames (thanks to EldarAgalarov and Deleetdk)
  * Fixed github issue #53: 1904 date system in mixed columns (thanks to waternova)
  * Added ability to skip end rows and columns on import from worksheet
    (#29; thanks to psychemedia for the feature request)
  * Fixed an issue with writeNamedRegion where named regions for 0-row
    data.frames have been defined with an extended empty row

0.2-11 2015-03-01
  * Moved to Apache POI 3.12-beta1
  * Fixed issue where formula cells would not be evaluated
  * Simplified advanced example in package vignette and removed
    the dependency on fImport, forecast and scales

0.2-10 2015-01-14
  * Moved to Apache POI 3.11
  * Fixed issue where milliseconds are getting lost when converting date/time
    values to string (#28)
  * Fixed problem with non-character column headers
  * Fixed declaration of encoding in vignette
  * Unit test functionality is not part of the public API anymore

0.2-9 2014-08-13
  * Fixing authors declaration in DESCRIPTION file
    to match CRAN policy
  * Fix java/README to only mention relevant JAR files

0.2-8 2014-08-05
  * Fix documentation with respect to conversion of numbers to dates
  * Fixed a bug that prevented rownames to be specified as a list
    in writeWorksheet
  * Automatically adjust for 1904 windowing (thanks to Jennifer Rogers!)
  * Moved to Apache POI 3.11-beta1
  * Added inst/COPYRIGHTS file
  * Added java/README providing information on where XLConnect sources can be
    obtained
  * Split package again into XLConnect and XLConnectJars as requested by CRAN

0.2-7 2014-01-03
  * Fixed date/time conversion issues
  * Set timezone for tests to UTC and align R-JVM timezones
  
0.2-6 2013-12-31
  * General performance improvements
  * Java exception stack traces are now captured in options("java.stacktrace")
  * Added documentation for with.workbook
  * Added support for milliseconds in date/time values
  * Add tzone attribute after creating POSIXct as some versions of R don't set it
  * Added arguments clearSheets and clearNamedRegions to functions
    writeWorksheetToFile and writeNamedRegionToFile respectively
  * Fixed an issue with validity checking of named regions in getDefinedNames
  * Moved to Apache POI 3.10-beta2
  * Moved to Joda-Time 2.3
  * XLConnect now "Imports" rJava and utils rather than "Depends" on them
  * XLConnect settings are now applied in .onLoad rather than .onAttach
    (this allows XLConnect to be imported using "Imports")
  * Added support for Excel tables (Office 2007+); see method readTable
  * Coerce non-numeric columns to character when used as rownames
  * Introduction of a new argument 'readStrategy' in methods readWorksheet,
    readNamedRegion, readTable to support improved read performance (see the
    help for more information)
  * readNamedRegionFromFile now exposes all arguments from readNamedRegion via 
    '...'
  * New style action DATATYPE that allows to define a cell style to be used for
    a given data type. With this there are new methods setCellStyleForType and
    getCellStyleForType.
  * Fixed issues reported by R CMD check
  * Added a new argument 'simplify' to the methods readWorksheet and
    readNamedRegion that specifies whether the result should be simplified e.g.
    in case the resulting data.frame only has one row or one column
  * Fixed an issue where Inf values resulted in a corrupted workbook; Inf
    values are now handled by setting corresponding cells as error cells with 
    the error code NA (according to Excel's NA() function)
  * Deprecated getReferenceCoordinates in favor of getReferenceCoordinatesForName

0.2-5 2013-03-18
  * Merged XLConnect & XLConnectJars
  * Fixed namespace import issue with rJava
  * Fixed an issue with empty cells in header rows
  * Moved to Joda-Time 2.2
  * Moved to xmlbeans 2.6.0 

0.2-4 2013-01-31
  * Ability to read cached cell values. There is a new argument useCachedValues
    to methods readWorksheet and readNamedRegion. This is especially useful for
    cells with complex formulas that XLConnect (Apache POI) cannot evaluate and
    so far would have resulted in NAs being returned. With this new option
    XLConnect can now read the cached values of cells.
  * There are new arguments keep and drop to readWorksheet and readNamedRegion
    which allow filtering of columns before the data is imported to R. This can
    result in much better performance compared to importing the full data to R
    and then doing the subsetting in R.
  * String conversions when reading in data from Excel (readWorksheet, readNamedRegion)
    now respect the data format of the cells
  * Support for numeric missing value identifiers (see method setMissingValue)
  * New Vignette "XLConnect for the Impatient" to get people started quickly
  * Added a new function getLastColumn to query the last non-empty column in a
    worksheet
  * The bounding box detection algorithm for readWorksheet has been adapted to better
    deal with leading and trailing rows and columns of blank cells. In addition, new
    arguments autofitRow and autofitCol have been introduced that allow removal of
    leading and trailing rows and columns even in case boundaries have been specified
    by the user. This is useful in situations where the data is expected within certain
    given boundaries but the exact location is not known.
  * Exposed setCellStyle(formula, cellstyle) to be able to set a cellstyle on a whole
    region for improved performance. Note that there is a slight API change to the
    setCellStyle method.
  * Fixed an issue with writing empty data.frames
  * Moved to Apache POI 3.9 (see package XLConnectJars)
  * Ensured vignette compatibility with ggplot2 0.9.3

0.2-3 2012-11-05
  * Fixed issue when trying to write empty data.frame with writeNamedRegion and
    writeNamedRegionToFile
  * Fixed issue in package vignette sample code
  * Added vectorization for rownames argument in readWorksheet, readNamedRegion, 
    writeWorksheet and writeNamedRegion

0.2-2 2012-10-15
  * Fixed issue in package vignette sample code
	
0.2-1 2012-08-15
  * Fixed issue with overwriting cells of different type
  * Fixed issue with failing unit tests on R-devel
    (issue with Excel date/time values and increased precision of
    all.equal for POSIXct)
  * Added new methods for clearing cells from a sheet, a named region
    or a range (clearSheet, clearNamedRegion, clearRange, clearRangeFromReference)

0.2-0 2012-07-18
  * Moved to Apache POI 3.8
  * Fixed lazy evaluation issues with S4 generics. Generic methods
    now fully expand the argument list in order to have the
    arguments immediately evaluated.
  * readWorksheet now returns a _named_ list if more than one worksheet
    is read. This provides convenient access to the corresponding data
    by list subsetting.
  * readWorksheet and readNamedRegion now provide a new argument named
    'check.names' that controls whether data.frame column names are
    checked for syntactically valid variable names (see the 'check.names'
    argument of data.frame).
  * Support for setting the color of worksheet tabs via the setSheetColor
    method (only for *.xlsx files).		
  * Support for freeze panes and split panes.
  * Removing dependency to tikzDevice package
  * Updates to the package vignette. Package vignette code examples can
    be found in the XLConnect.R script file in the top level library
    directory or by typing edit(file = system.file("XLConnect.R", 
    package = "XLConnect"))
	
0.1-9 2012-03-08
  * Vignette examples now run with ggplot2 0.9.0+
  * loadWorkbook and saveWorkbook now expand paths using
    path.expand
  * readWorksheet provides a new argument 'region' that allows
    to specify area bounds in an alternative way to startRow,
    startCol, endRow and endCol.

0.1-8 2012-02-10
  * Moved to Apache POI 3.8-beta5
  * Improved & extended package vignette
  * Introduced xlcEdit for editing data.frames in an Excel editor,
    e.g. MS Excel.
  * Columns in data.frames that have a type/class with no direct
    correspondence in Excel (i.e. everything which is not a logical,
    numeric, character or Date/POSIXt) are converted to character
    using as.character when writing to Excel rather than the 
    following error being thrown:
    "Unsupported data type (class) detected!"
  * New arguments colTypes, forceConversion and dateTimeFormat
    for methods readNamedRegion and readWorksheet. colTypes allows
    to pre-specify column types (and force them in conjunction with
    forceConversion) when reading in data. forceConversion forces 
    conversion to less generic types (e.g. a string in Excel to a 
    POSIXt in R). dateTimeFormat is a format specifier used when 
    doing date/time conversions.
	
0.1-7 2011-10-19
  * Moved to Apache POI 3.8-beta4
  * Performance improvements when writing large xlsx files. This
    fix was implemented on the Apache POI side.
  * An issue was fixed where the bounding box was not appropriately
    determined when using readWorksheet. The bounding box is now
    determined by first determining start and end row. Afterwards,
    for all rows between the start and the end row the minimum and 
    maximum column is determined.
  * An issue was fixed where the named region was automatically
    expanded by one row when writing data to a named region without
    column headers.
  * New workbook data extraction & replacement operators [, [<-,
    [[, [[<-. These are "syntactic sugar" for the already existing
    methods readWorksheet, writeWorksheet, readNamedRegion and
    writeNamedRegion.
  * Support for saving workbooks to a new file ("save as").
  * Support for querying the last (non-empty) row in a worksheet
  * Support for including the row names of a data.frame when
    writing to a worksheet or a named region. In addition, when
    reading data from a worksheet or a named region a column
    can be specified that should be turned into row names.
  * Extended use of setMissingValue. setMissingValue allows to
    define a set of missing value identifiers that are recognized
    as missing values when reading in data. The first element of
    this set is used as missing value identifier when writing data.
  * Improvements to the definition of several generic functions &
    methods
  * Improvements to the functions writeNamedRegionToFile &
    writeWorksheetToFile. Also, an issue was fixed with
    writeNamedRegionToFile where quoted sheet names (e.g. due to
    a whitespace in the sheet name) would have caused an error.
  * Support for auto-sizing of columns.
  * New functionality to append data to named regions and work-
    sheets: appendNamedRegion & appendWorksheet.
  * Several internal changes on the Java side: removing Java
    logging, using java.util.ArrayList instead of java.util.Vector
  * Functionality for dumping and restoring objects to/from Excel
    files (xlcDump, xlcRestore)
  * Added a package vignette

0.1-5 2011-07-07
  * Support for setting/getting cell formulas. See methods
    set/getCellFormula.
  * Support for setting/getting the force formula recalculation flag on
    worksheets. See methods set/getForceFormulaRecalculation.
  * Support for setting auto-filters via the setAutoFilter method.
  * There is a set of new utility functions:
    - aref2idx, idx2aref: Converts Excel area references (such as A5:D14)
      to row & column based cell references and vice versa.
    - aref: Constructs an Excel area reference from a specification of the
      top left corner and the dimensionality of an object.
    - getReferenceCoordinates: Queries the coordinates of an Excel name
      representing an Excel area reference (such as A5:D14)

0.1-4 2011-05-26
  * An issue was fixed where cell styles would not be applied correctly.
  * There is a new style action called NONE: This style action instructs 
    XLConnect to apply no cell styles when writing data. Cell styles are kept 
    as they are. This is useful in a scenario where all styling is predefined 
    in an Excel template which is then only filled with data.
  * There is a new DATA_FORMAT_ONLY style action: This style action instructs
    XLConnect to only set the data format for a cell but not to apply any other 
    styling but rather keep the existing one. The data format to be applied is 
    determined by the corresponding R data type and can be defined by the user. 
    This style action may be useful in scenarios where Excel templates with 
    pre-defined styling are to be filled with XLConnect.
  * Worksheets can be renamed with the new renameSheet method.
  * The positions (indices) of worksheets can be queried & redefined using the 
    new methods getSheetPos & setSheetPos.
  * Worksheets can be cloned using the new method cloneSheet.
  * There is a set of new utility functions:
    - col2idx, idx2col: Converts Excel column names such as BD to indices and 
      vice versa.
    - cref2idx, idx2cref: Converts cell references to row & column indices and 
      vice versa.
  * Setting a missing value string when writing missing values from R to Excel. 
    By default missing values result in blank/empty cells. This is to have a nice 
    type mapping between R and Excel. In some cases, however, you might want to 
    define a specific missing value string to be used by XLConnect when writing 
    cells representing missing values instead of blank/empty cells. This can be 
    done using the new method setMissingValue.
  * The handling of error cells (cells that result in an error when trying to 
    evaluate them) has been greatly improved. With XLConnect 0.1-3 error cells 
    directly resulted in an exception. With XLConnect 0.1-4 this behavior can 
    be controlled using the onErrorCell method. By default error cells now result 
    in a missing value and the corresponding error cells will be reported via 
    warnings. The behavior may be changed to get an exception with the first 
    occurrence of an error cell.
  * There is two new methods for merging & un-merging cells: mergeCells & 
    unmergeCells.

0.1-3 2011-02-27
  * Initial Release
