org.apache.poi.poifs.filesystem

Class DirectoryNode

java.lang.Object

org.apache.poi.poifs.filesystem.EntryNode

org.apache.poi.poifs.filesystem.DirectoryNode

All Implemented Interfaces:

java.lang.Iterable<Entry>, POIFSViewable, DirectoryEntry, Entry

public class DirectoryNode
extends EntryNode
implements DirectoryEntry, POIFSViewable, java.lang.Iterable<Entry>

Simple implementation of DirectoryEntry

Method Summary

Modifier and Type	Method and Description
DirectoryEntry	createDirectory(java.lang.String name) create a new DirectoryEntry
DocumentEntry	createDocument(java.lang.String name, java.io.InputStream stream) create a new DocumentEntry
DocumentEntry	createDocument(java.lang.String name, int size, POIFSWriterListener writer) create a new DocumentEntry; the data will be provided later
DocumentInputStream	createDocumentInputStream(Entry document) open a document in the directory's entry's list of entries
DocumentInputStream	createDocumentInputStream(java.lang.String documentName) open a document in the directory's entry's list of entries
DocumentEntry	createOrUpdateDocument(java.lang.String name, java.io.InputStream stream) Set the contents of a document, creating if needed, otherwise updating.
java.util.Iterator<Entry>	getEntries() get an iterator of the Entry instances contained directly in this instance (in other words, children only; no grandchildren etc.)
Entry	getEntry(java.lang.String name) get a specified Entry by name
int	getEntryCount() find out how many Entry instances are contained directly within this DirectoryEntry
java.util.Set<java.lang.String>	getEntryNames() get the names of all the Entries contained directly in this instance (in other words, names of children only; no grandchildren etc).
POIFSFileSystem	getFileSystem()
POIFSDocumentPath	getPath()
java.lang.String	getShortDescription() Provides a short description of the object, to be used when a POIFSViewable object has not provided its contents.
ClassID	getStorageClsid() Gets the storage clsid of the directory entry
java.lang.Object[]	getViewableArray() Get an array of objects, some of which may implement POIFSViewable
java.util.Iterator<java.lang.Object>	getViewableIterator() Get an Iterator of objects, some of which may implement POIFSViewable
boolean	hasEntry(java.lang.String name) Checks if entry with specified name present
protected boolean	isDeleteOK() extensions use this method to verify internal rules regarding deletion of the underlying store.
boolean	isDirectoryEntry() is this a DirectoryEntry?
boolean	isEmpty() is this DirectoryEntry empty?
java.util.Iterator<Entry>	iterator() Returns an Iterator over all the entries
boolean	preferArray() Give viewers a hint as to whether to call getViewableArray or getViewableIterator
void	setStorageClsid(ClassID clsidStorage) Sets the storage clsid for the directory entry

Methods inherited from class org.apache.poi.poifs.filesystem.EntryNode

delete, getName, getParent, getProperty, isDocumentEntry, isRoot, renameTo

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.poi.poifs.filesystem.Entry

delete, getName, getParent, isDocumentEntry, renameTo

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Detail

getPath

public POIFSDocumentPath getPath()

Returns:

this directory's path representation

getFileSystem

public POIFSFileSystem getFileSystem()

Returns:

the filesystem that this belongs to

createDocumentInputStream

public DocumentInputStream createDocumentInputStream(java.lang.String documentName)
                                              throws java.io.IOException

open a document in the directory's entry's list of entries

Parameters:

documentName - the name of the document to be opened

Returns:

a newly opened DocumentInputStream

Throws:

java.io.IOException - if the document does not exist or the name is that of a DirectoryEntry

createDocumentInputStream

public DocumentInputStream createDocumentInputStream(Entry document)
                                              throws java.io.IOException

open a document in the directory's entry's list of entries

Parameters:

document - the document to be opened

Returns:

a newly opened DocumentInputStream or DocumentInputStream

Throws:

java.io.IOException - if the document does not exist or the name is that of a DirectoryEntry

getEntries

public java.util.Iterator<Entry> getEntries()

get an iterator of the Entry instances contained directly in this instance (in other words, children only; no grandchildren etc.)

Specified by:

getEntries in interface DirectoryEntry

Returns:

iterator; never null, but hasNext() may return false immediately (i.e., this DirectoryEntry is empty). All objects retrieved by next() are guaranteed to be implementations of Entry.

getEntryNames

public java.util.Set<java.lang.String> getEntryNames()

get the names of all the Entries contained directly in this instance (in other words, names of children only; no grandchildren etc).

Specified by:

getEntryNames in interface DirectoryEntry

Returns:

the names of all the entries that may be retrieved with getEntry(String), which may be empty (if this DirectoryEntry is empty)

isEmpty

public boolean isEmpty()

is this DirectoryEntry empty?

Specified by:

isEmpty in interface DirectoryEntry

Returns:

true if this instance contains no Entry instances

getEntryCount

public int getEntryCount()

find out how many Entry instances are contained directly within this DirectoryEntry

Specified by:

getEntryCount in interface DirectoryEntry

Returns:

number of immediately (no grandchildren etc.) contained Entry instances

hasEntry

public boolean hasEntry(java.lang.String name)

Description copied from interface: DirectoryEntry

Checks if entry with specified name present

Specified by:

hasEntry in interface DirectoryEntry

getEntry

public Entry getEntry(java.lang.String name)
               throws java.io.FileNotFoundException

get a specified Entry by name

Specified by:

getEntry in interface DirectoryEntry

Parameters:

name - the name of the Entry to obtain.

Returns:

the specified Entry, if it is directly contained in this DirectoryEntry

Throws:

java.io.FileNotFoundException - if no Entry with the specified name exists in this DirectoryEntry

createDocument

public DocumentEntry createDocument(java.lang.String name,
                                    java.io.InputStream stream)
                             throws java.io.IOException

create a new DocumentEntry

Specified by:

createDocument in interface DirectoryEntry

Parameters:

name - the name of the new DocumentEntry

stream - the InputStream from which to create the new DocumentEntry

Returns:

the new DocumentEntry

Throws:

java.io.IOException - if the document can't be created

createDocument

public DocumentEntry createDocument(java.lang.String name,
                                    int size,
                                    POIFSWriterListener writer)
                             throws java.io.IOException

create a new DocumentEntry; the data will be provided later

Specified by:

createDocument in interface DirectoryEntry

Parameters:

name - the name of the new DocumentEntry

size - the size of the new DocumentEntry

writer - the writer of the new DocumentEntry

Returns:

the new DocumentEntry

Throws:

java.io.IOException - if the document can't be created

createDirectory

public DirectoryEntry createDirectory(java.lang.String name)
                               throws java.io.IOException

create a new DirectoryEntry

Specified by:

createDirectory in interface DirectoryEntry

Parameters:

name - the name of the new DirectoryEntry

Returns:

the new DirectoryEntry

Throws:

java.io.IOException - if the directory can't be created

createOrUpdateDocument

public DocumentEntry createOrUpdateDocument(java.lang.String name,
                                            java.io.InputStream stream)
                                     throws java.io.IOException

Set the contents of a document, creating if needed, otherwise updating. Returns the created / updated DocumentEntry

Parameters:

name - the name of the new or existing DocumentEntry

stream - the InputStream from which to populate the DocumentEntry

Returns:

the new or updated DocumentEntry

Throws:

java.io.IOException - if the document can't be created or its content be replaced

getStorageClsid

public ClassID getStorageClsid()

Gets the storage clsid of the directory entry

Specified by:

getStorageClsid in interface DirectoryEntry

Returns:

storage Class ID

setStorageClsid

public void setStorageClsid(ClassID clsidStorage)

Sets the storage clsid for the directory entry

Specified by:

setStorageClsid in interface DirectoryEntry

Parameters:

clsidStorage - storage Class ID

isDirectoryEntry

public boolean isDirectoryEntry()

is this a DirectoryEntry?

Specified by:

isDirectoryEntry in interface Entry

Overrides:

isDirectoryEntry in class EntryNode

Returns:

true if the Entry is a DirectoryEntry, else false

isDeleteOK

protected boolean isDeleteOK()

extensions use this method to verify internal rules regarding deletion of the underlying store.

Specified by:

isDeleteOK in class EntryNode

Returns:

true if it's ok to delete the underlying store, else false

getViewableArray

public java.lang.Object[] getViewableArray()

Get an array of objects, some of which may implement POIFSViewable

Specified by:

getViewableArray in interface POIFSViewable

Returns:

an array of Object; may not be null, but may be empty

getViewableIterator

public java.util.Iterator<java.lang.Object> getViewableIterator()

Get an Iterator of objects, some of which may implement POIFSViewable

Specified by:

getViewableIterator in interface POIFSViewable

Returns:

an Iterator; may not be null, but may have an empty back end store

preferArray

public boolean preferArray()

Give viewers a hint as to whether to call getViewableArray or getViewableIterator

Specified by:

preferArray in interface POIFSViewable

Returns:

true if a viewer should call getViewableArray, false if a viewer should call getViewableIterator

getShortDescription

public java.lang.String getShortDescription()

Provides a short description of the object, to be used when a POIFSViewable object has not provided its contents.

Specified by:

getShortDescription in interface POIFSViewable

Returns:

short description

iterator

public java.util.Iterator<Entry> iterator()

Returns an Iterator over all the entries

Specified by:

iterator in interface java.lang.Iterable<Entry>