Package org.apache.poi.poifs.filesystem

Class DocumentFactoryHelper

java.lang.Object

org.apache.poi.poifs.filesystem.DocumentFactoryHelper

@Internal
public final class DocumentFactoryHelper
extends java.lang.Object

A small base class for the various factories, e.g. WorkbookFactory, SlideShowFactory to combine common code here.

Method Summary

Modifier and Type	Method	Description
static java.io.InputStream	getDecryptedStream(DirectoryNode root, java.lang.String password)	Wrap the OLE2 data of the DirectoryNode into a decrypted stream by using the given password.
static java.io.InputStream	getDecryptedStream(POIFSFileSystem fs, java.lang.String password)	Wrap the OLE2 data in the NPOIFSFileSystem into a decrypted stream by using the given password.
static boolean	hasOOXMLHeader(java.io.InputStream inp)	Deprecated. in 3.17-beta2, use FileMagic.valueOf(InputStream) == FileMagic.OOXML instead

Methods inherited from class java.lang.Object

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

Method Detail

getDecryptedStream

public static java.io.InputStream getDecryptedStream(POIFSFileSystem fs,
                                                     java.lang.String password)
                                              throws java.io.IOException

Wrap the OLE2 data in the NPOIFSFileSystem into a decrypted stream by using the given password.

Parameters:

fs - The OLE2 stream for the document

password - The password, null if the default password should be used

Returns:

A stream for reading the decrypted data

Throws:

java.io.IOException - If an error occurs while decrypting or if the password does not match

getDecryptedStream

public static java.io.InputStream getDecryptedStream(DirectoryNode root,
                                                     java.lang.String password)
                                              throws java.io.IOException

Wrap the OLE2 data of the DirectoryNode into a decrypted stream by using the given password.

Parameters:

root - The OLE2 directory node for the document

password - The password, null if the default password should be used

Returns:

A stream for reading the decrypted data

Throws:

java.io.IOException - If an error occurs while decrypting or if the password does not match

hasOOXMLHeader

@Deprecated
@Removal(version="4.0")
public static boolean hasOOXMLHeader(java.io.InputStream inp)
                              throws java.io.IOException

Deprecated.

in 3.17-beta2, use FileMagic.valueOf(InputStream) == FileMagic.OOXML instead

Checks that the supplied InputStream (which MUST support mark and reset) has a OOXML (zip) header at the start of it.

If unsure if your InputStream does support mark / reset, use FileMagic.prepareToCheckMagic(InputStream) to wrap it and make sure to always use that, and not the original!

Parameters:

inp - An InputStream which supports either mark/reset

Throws:

java.io.IOException