org.apache.poi
Class POIDocument

java.lang.Object
  org.apache.poi.POIDocument

All Implemented Interfaces:

java.io.Closeable

Direct Known Subclasses:

HPSFPropertiesOnlyDocument, HSSFWorkbook

public abstract class POIDocument
extends java.lang.Object
implements java.io.Closeable

This holds the common functionality for all POI Document classes. Currently, this relates to Document Information Properties

POIDocument

protected POIDocument(DirectoryNode dir)

Constructs a POIDocument with the given directory node.

Parameters:

dir - The DirectoryNode where information is read from.

POIDocument

protected POIDocument(OPOIFSFileSystem fs)

Constructs from an old-style OPOIFS

Parameters:

fs - the filesystem the document is read from

POIDocument

protected POIDocument(NPOIFSFileSystem fs)

Constructs from an old-style OPOIFS

Parameters:

fs - the filesystem the document is read from

POIDocument

protected POIDocument(POIFSFileSystem fs)

Constructs from the default POIFS

Parameters:

fs - the filesystem the document is read from

getDocumentSummaryInformation

public DocumentSummaryInformation getDocumentSummaryInformation()

Fetch the Document Summary Information of the document

Returns:

The Document Summary Information or null if it could not be read for this document.

getSummaryInformation

public SummaryInformation getSummaryInformation()

Fetch the Summary Information of the document

Returns:

The Summary information for the document or null if it could not be read for this document.

createInformationProperties

public void createInformationProperties()

Will create whichever of SummaryInformation and DocumentSummaryInformation (HPSF) properties are not already part of your document. This is normally useful when creating a new document from scratch. If the information properties are already there, then nothing will happen.

readProperties

protected void readProperties()

Find, and create objects for, the standard Document Information Properties (HPSF). If a given property set is missing or corrupt, it will remain null;

getPropertySet

protected PropertySet getPropertySet(java.lang.String setName)
                              throws java.io.IOException

For a given named property entry, either return it or null if if it wasn't found

Parameters:

setName - The property to read

Returns:

The value of the given property or null if it wasn't found.

Throws:

java.io.IOException

getPropertySet

protected PropertySet getPropertySet(java.lang.String setName,
                                     EncryptionInfo encryptionInfo)
                              throws java.io.IOException

For a given named property entry, either return it or null if if it wasn't found

Parameters:

setName - The property to read

encryptionInfo - the encryption descriptor in case of cryptoAPI encryption

Returns:

The value of the given property or null if it wasn't found.

Throws:

java.io.IOException

writeProperties

protected void writeProperties()
                        throws java.io.IOException

Writes out the updated standard Document Information Properties (HPSF) into the currently open NPOIFSFileSystem

Throws:

java.io.IOException - if an error when writing to the open NPOIFSFileSystem occurs

writeProperties

protected void writeProperties(NPOIFSFileSystem outFS)
                        throws java.io.IOException

Writes out the standard Document Information Properties (HPSF)

Parameters:

outFS - the POIFSFileSystem to write the properties into

Throws:

java.io.IOException - if an error when writing to the NPOIFSFileSystem occurs

writeProperties

protected void writeProperties(NPOIFSFileSystem outFS,
                               java.util.List<java.lang.String> writtenEntries)
                        throws java.io.IOException

Writes out the standard Document Information Properties (HPSF)

Parameters:

outFS - the NPOIFSFileSystem to write the properties into

writtenEntries - a list of POIFS entries to add the property names too

Throws:

java.io.IOException - if an error when writing to the NPOIFSFileSystem occurs

writePropertySet

protected void writePropertySet(java.lang.String name,
                                PropertySet set,
                                NPOIFSFileSystem outFS)
                         throws java.io.IOException

Writes out a given ProperySet

Parameters:

name - the (POIFS Level) name of the property to write

set - the PropertySet to write out

outFS - the NPOIFSFileSystem to write the property into

Throws:

java.io.IOException - if an error when writing to the NPOIFSFileSystem occurs

validateInPlaceWritePossible

protected void validateInPlaceWritePossible()
                                     throws java.lang.IllegalStateException

Called during a write() to ensure that the Document (and associated POIFSFileSystem) was opened in a way compatible with an in-place write.

Throws:

java.lang.IllegalStateException - if the document was opened suitably

write

public abstract void write()
                    throws java.io.IOException

Writes the document out to the currently open File, via the writeable POIFSFileSystem it was opened from.

This will fail (with an IllegalStateException if the document was opened read-only, opened from an InputStream instead of a File, or if this is not the root document. For those cases, you must use write(OutputStream) or write(File) to write to a brand new document.

Throws:

java.io.IOException - thrown on errors writing to the file

java.lang.IllegalStateException - if this isn't from a writable File

Since:

POI 3.15 beta 3

write

public abstract void write(java.io.File newFile)
                    throws java.io.IOException

Writes the document out to the specified new File. If the file exists, it will be replaced, otherwise a new one will be created

Parameters:

newFile - The new File to write to.

Throws:

java.io.IOException - thrown on errors writing to the file

Since:

POI 3.15 beta 3

write

public abstract void write(java.io.OutputStream out)
                    throws java.io.IOException

Writes the document out to the specified output stream. The stream is not closed as part of this operation. Note - if the Document was opened from a File rather than an InputStream, you must write out using write() or to a different File. Overwriting the currently open file via an OutputStream isn't possible. If stream is a FileOutputStream on a networked drive or has a high cost/latency associated with each written byte, consider wrapping the OutputStream in a BufferedOutputStream to improve write performance, or use write() / write(File) if possible.

Parameters:

out - The stream to write to.

Throws:

java.io.IOException - thrown on errors writing to the stream

close

public void close()
           throws java.io.IOException

Closes the underlying NPOIFSFileSystem from which the document was read, if any. Has no effect on documents opened from an InputStream, or newly created ones.

Once close() has been called, no further operations should be called on the document.

Specified by:

close in interface java.io.Closeable

Throws:

java.io.IOException

getDirectory

@Internal
public DirectoryNode getDirectory()

clearDirectory

@Internal
protected void clearDirectory()

Clear/unlink the attached directory entry

initDirectory

@Internal
protected boolean initDirectory()

check if we were created by POIFS otherwise create a new dummy POIFS for storing the package data

Returns:

true if dummy directory was created, false otherwise

replaceDirectory

@Internal
protected DirectoryNode replaceDirectory(DirectoryNode newDirectory)

Replaces the attached directory, e.g. if this document is written to a new POIFSFileSystem

Parameters:

newDirectory - the new directory

Returns:

the old/previous directory

getEncryptedPropertyStreamName

protected java.lang.String getEncryptedPropertyStreamName()

Returns:

the stream name of the property set collection, if the document is encrypted

getEncryptionInfo

public EncryptionInfo getEncryptionInfo()
                                 throws java.io.IOException

Returns:

the encryption info if the document is encrypted, otherwise null

Throws:

java.io.IOException