org.apache.poi.xssf.streaming

Class SheetDataWriter

java.lang.Object

org.apache.poi.xssf.streaming.SheetDataWriter

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

Direct Known Subclasses:

GZIPSheetDataWriter, SheetDataWriterWithDecorator, StreamingSheetWriter

public class SheetDataWriter
extends java.lang.Object
implements java.io.Closeable

Initially copied from BigGridDemo "SpreadsheetWriter". Unlike the original code which wrote the entire document, this class only writes the "sheetData" document fragment so that it was renamed to "SheetDataWriter"

Field Summary

Fields

Modifier and Type	Field and Description
protected java.io.Writer	_out

Constructor Summary

Constructors

Constructor and Description
SheetDataWriter()
SheetDataWriter(SharedStringsTable sharedStringsTable)
SheetDataWriter(java.io.Writer writer)

Method Summary

Modifier and Type	Method and Description
void	close() flush and close the temp data writer.
java.io.File	createTempFile() Create a temp file to write sheet data.
java.io.Writer	createWriter(java.io.File fd) Create a writer for the sheet data.
protected java.io.InputStream	decorateInputStream(java.io.FileInputStream fis) Override this to translate (such as decrypt or expand) the file input stream as it is being read from disk.
protected java.io.OutputStream	decorateOutputStream(java.io.FileOutputStream fos) Override this to translate (such as encrypt or compress) the file output stream as it is being written to disk.
protected void	finalize()
int	getLastFlushedRow()
int	getLowestIndexOfFlushedRows()
int	getNumberOfCellsOfLastFlushedRow()
int	getNumberOfFlushedRows()
protected java.io.File	getTempFile()
java.io.InputStream	getWorksheetXMLInputStream()
protected void	outputEscapedString(java.lang.String s)
void	writeCell(int columnIndex, Cell cell)
void	writeRow(int rownum, SXSSFRow row) Write a row to the file

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_out

protected final java.io.Writer _out

Constructor Detail

SheetDataWriter

public SheetDataWriter()
                throws java.io.IOException

Throws:

java.io.IOException

SheetDataWriter

public SheetDataWriter(java.io.Writer writer)
                throws java.io.IOException

Throws:

java.io.IOException

SheetDataWriter

public SheetDataWriter(SharedStringsTable sharedStringsTable)
                throws java.io.IOException

Throws:

java.io.IOException

Method Detail

createTempFile

public java.io.File createTempFile()
                            throws java.io.IOException

Create a temp file to write sheet data. By default, temp files are created in the default temporary-file directory with a prefix "poi-sxssf-sheet" and suffix ".xml". Subclasses can override it and specify a different temp directory or filename or suffix, e.g. .gz

Returns:

temp file to write sheet data

Throws:

java.io.IOException

createWriter

public java.io.Writer createWriter(java.io.File fd)
                            throws java.io.IOException

Create a writer for the sheet data.

Parameters:

fd - the file to write to

Throws:

java.io.IOException

decorateOutputStream

protected java.io.OutputStream decorateOutputStream(java.io.FileOutputStream fos)
                                             throws java.io.IOException

Override this to translate (such as encrypt or compress) the file output stream as it is being written to disk. The default behavior is to to pass the stream through unmodified.

Parameters:

fos - the stream to decorate

Returns:

a decorated stream

Throws:

java.io.IOException - if decorating the stream fails

See Also:

decorateInputStream(FileInputStream)

close

public void close()
           throws java.io.IOException

flush and close the temp data writer. This method must be invoked before calling getWorksheetXMLInputStream()

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Throws:

java.io.IOException

getTempFile

protected java.io.File getTempFile()

getWorksheetXMLInputStream

public java.io.InputStream getWorksheetXMLInputStream()
                                               throws java.io.IOException

Returns:

a stream to read temp file with the sheet data

Throws:

java.io.IOException

decorateInputStream

protected java.io.InputStream decorateInputStream(java.io.FileInputStream fis)
                                           throws java.io.IOException

Override this to translate (such as decrypt or expand) the file input stream as it is being read from disk. The default behavior is to to pass the stream through unmodified.

Parameters:

fis - the stream to decorate

Returns:

a decorated stream

Throws:

java.io.IOException - if decorating the stream fails

See Also:

decorateOutputStream(FileOutputStream)

getNumberOfFlushedRows

public int getNumberOfFlushedRows()

getNumberOfCellsOfLastFlushedRow

public int getNumberOfCellsOfLastFlushedRow()

getLowestIndexOfFlushedRows

public int getLowestIndexOfFlushedRows()

getLastFlushedRow

public int getLastFlushedRow()

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class java.lang.Object

Throws:

java.lang.Throwable

writeRow

public void writeRow(int rownum,
                     SXSSFRow row)
              throws java.io.IOException

Write a row to the file

Parameters:

rownum - 0-based row number

row - a row

Throws:

java.io.IOException - If an I/O error occurs

writeCell

public void writeCell(int columnIndex,
                      Cell cell)
               throws java.io.IOException

Throws:

java.io.IOException

outputEscapedString

protected void outputEscapedString(java.lang.String s)
                            throws java.io.IOException

Throws:

java.io.IOException