Package org.apache.poi.examples.xwpf.usermodel

Class UpdateEmbeddedDoc

java.lang.Object

org.apache.poi.examples.xwpf.usermodel.UpdateEmbeddedDoc

public class UpdateEmbeddedDoc
extends Object

Tests whether it is possible to successfully update an Excel workbook that is embedded into a WordprocessingML document. Note that the test has currently only been conducted with a binary Excel workbook and NOT yet with a SpreadsheetML workbook embedded into the document.

This code was successfully tested with the following file from the POI test collection: http://svn.apache.org/repos/asf/poi/trunk/test-data/document/EmbeddedDocument.docx

Constructor Summary

Constructors

Constructor	Description
UpdateEmbeddedDoc(String filename)	Create a new instance of the UpdateEmbeddedDoc class using the following parameters;

Method Summary

Modifier and Type	Method	Description
void	checkUpdatedDoc()	Called to test whether or not the embedded workbook was correctly updated.
static void	main(String[] args)	Code to test updating of the embedded Excel workbook.
void	updateEmbeddedDoc()	Called to update the embedded Excel workbook.

Methods inherited from class java.lang.Object

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

Constructor Detail

UpdateEmbeddedDoc

public UpdateEmbeddedDoc(String filename)
                  throws FileNotFoundException,
                         IOException

Create a new instance of the UpdateEmbeddedDoc class using the following parameters;

Parameters:

filename - An instance of the String class that encapsulates the name of and path to a WordprocessingML Word document that contains an embedded binary Excel workbook.

Throws:

FileNotFoundException - Thrown if the file cannot be found on the underlying file system.

IOException - Thrown if a problem occurs in the underlying file system.

Method Detail

updateEmbeddedDoc

public void updateEmbeddedDoc()
                       throws OpenXML4JException,
                              IOException

Called to update the embedded Excel workbook. As the format and structure of the workbook are known in advance, all this code attempts to do is write a new value into the first cell on the first row of the first worksheet. Prior to executing this method, that cell will contain the value 1.

Throws:

OpenXML4JException - Rather than use the specific classes (HSSF/XSSF) to handle the embedded workbook this method uses those defined in the SS stream. As a result, it might be the case that a SpreadsheetML file is opened for processing, throwing this exception if that file is invalid.

IOException - Thrown if a problem occurs in the underlying file system.

checkUpdatedDoc

public void checkUpdatedDoc()
                     throws OpenXML4JException,
                            IOException

Called to test whether or not the embedded workbook was correctly updated. This method simply recovers the first cell from the first row of the first workbook and tests the value it contains.

Note that execution will not continue up to the assertion as the embedded workbook is now corrupted and causes an IllegalArgumentException with the following message

java.lang.IllegalArgumentException: Your InputStream was neither an OLE2 stream, nor an OOXML stream

to be thrown when the WorkbookFactory.createWorkbook(InputStream) method is executed.

Throws:

OpenXML4JException - Rather than use the specific classes (HSSF/XSSF) to handle the embedded workbook this method uses those defined in the SS stream. As a result, it might be the case that a SpreadsheetML file is opened for processing, throwing this exception if that file is invalid.

IOException - Thrown if a problem occurs in the underlying file system.

main

public static void main(String[] args)
                 throws IOException,
                        OpenXML4JException

Code to test updating of the embedded Excel workbook.

Throws:

IOException

OpenXML4JException