Package org.apache.wiki.attachment

Class DefaultAttachmentManager

java.lang.Object

org.apache.wiki.attachment.DefaultAttachmentManager

All Implemented Interfaces:

AttachmentManager

public class DefaultAttachmentManager
extends Object
implements AttachmentManager

Default implementation for AttachmentManager

Since:

1.9.28

Field Summary

Fields inherited from interface org.apache.wiki.attachment.AttachmentManager

CACHE_NAME, DEFAULT_CACHECAPACITY, PROP_ALLOWEDEXTENSIONS, PROP_FORBIDDENEXTENSIONS, PROP_FORCEDOWNLOAD, PROP_MAXSIZE, PROP_PROVIDER

Constructor Summary

Constructors

Constructor	Description
DefaultAttachmentManager(Engine engine, Properties props)	Creates a new AttachmentManager.

Method Summary

Modifier and Type	Method	Description
boolean	attachmentsEnabled()	Returns true, if attachments are enabled and running.
void	deleteAttachment(Attachment att)	Deletes all versions of the given attachment.
void	deleteVersion(Attachment att)	Deletes the given attachment version.
boolean	forceDownload(String name)	Check if attachement link should force a download iso opening the attachment in the browser.
Collection<Attachment>	getAllAttachments()	Returns a collection of Attachments, containing each and every attachment that is in this Wiki.
Attachment	getAttachmentInfo(Context context, String attachmentname, int version)	Figures out the full attachment name from the context and attachment name.
String	getAttachmentInfoName(Context context, String attachmentname)	Figures out the full attachment name from the context and attachment name.
InputStream	getAttachmentStream(Context ctx, Attachment att)	Returns an attachment stream using the particular WikiContext.
AttachmentProvider	getCurrentProvider()	Returns the current attachment provider.
DynamicAttachment	getDynamicAttachment(String name)	Finds a DynamicAttachment.
List<Attachment>	getVersionHistory(String attachmentName)	Returns a list of versions of the attachment.
List<Attachment>	listAttachments(Page wikipage)	Returns the list of attachments associated with a given wiki page.
void	storeAttachment(Attachment att, InputStream in)	Stores an attachment directly from a stream.
void	storeDynamicAttachment(Context ctx, DynamicAttachment att)	Stores a dynamic attachment.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.wiki.attachment.AttachmentManager

getAttachmentInfo, getAttachmentInfo, getAttachmentInfo, getAttachmentStream, hasAttachments, storeAttachment

Constructor Details

DefaultAttachmentManager

public DefaultAttachmentManager(Engine engine,
Properties props)

Creates a new AttachmentManager. Note that creation will never fail, but it's quite likely that attachments do not function.

DO NOT CREATE an AttachmentManager on your own, unless you really know what you're doing. Just use Wikiengine.getManager( AttachmentManager.class ) if you're making a module for JSPWiki.

Parameters:

engine - The wikiengine that owns this attachment manager.

props - A list of properties from which the AttachmentManager will seek its configuration. Typically this is the "jspwiki.properties".

Method Details

attachmentsEnabled

public boolean attachmentsEnabled()

Returns true, if attachments are enabled and running.

Specified by:

attachmentsEnabled in interface AttachmentManager

Returns:

A boolean value indicating whether attachment functionality is enabled.

getAttachmentInfoName

public String getAttachmentInfoName(Context context,
String attachmentname)

Figures out the full attachment name from the context and attachment name.

Specified by:

getAttachmentInfoName in interface AttachmentManager

Parameters:

context - The current WikiContext

attachmentname - The file name of the attachment.

Returns:

Attachment, or null, if no such attachment exists.

getAttachmentInfo

public Attachment getAttachmentInfo(Context context,
String attachmentname,
int version)
                             throws ProviderException

Figures out the full attachment name from the context and attachment name.

Specified by:

getAttachmentInfo in interface AttachmentManager

Parameters:

context - The current WikiContext

attachmentname - The file name of the attachment.

version - A particular version.

Returns:

Attachment, or null, if no such attachment or version exists.

Throws:

ProviderException - If something goes wrong.

listAttachments

public List<Attachment> listAttachments(Page wikipage)
                                 throws ProviderException

Returns the list of attachments associated with a given wiki page. If there are no attachments, returns an empty Collection.

Specified by:

listAttachments in interface AttachmentManager

Parameters:

wikipage - The wiki page from which you are seeking attachments for.

Returns:

a valid collection of attachments.

Throws:

ProviderException - If there was something wrong in the backend.

forceDownload

public boolean forceDownload(String name)

Check if attachement link should force a download iso opening the attachment in the browser.

Specified by:

forceDownload in interface AttachmentManager

Parameters:

name - Name of attachment to be checked

Returns:

true, if the attachment should be downloaded when clicking the link

getAttachmentStream

public InputStream getAttachmentStream(Context ctx,
Attachment att)
                                throws ProviderException,
IOException

Returns an attachment stream using the particular WikiContext. This method should be used instead of AttachmentManager.getAttachmentStream(Attachment), since it also allows the DynamicAttachments to function.

Specified by:

getAttachmentStream in interface AttachmentManager

Parameters:

ctx - The Wiki Context

att - The Attachment to find

Returns:

An InputStream. May return null, if attachments are disabled. You must take care of closing it.

Throws:

ProviderException - If the backend fails due to some reason

IOException - If the stream cannot be opened

storeDynamicAttachment

public void storeDynamicAttachment(Context ctx,
DynamicAttachment att)

Stores a dynamic attachment. Unlike storeAttachment(), this just stores the attachment in the memory.

Specified by:

storeDynamicAttachment in interface AttachmentManager

Parameters:

ctx - A WikiContext

att - An attachment to store

getDynamicAttachment

public DynamicAttachment getDynamicAttachment(String name)

Finds a DynamicAttachment. Normally, you should just use AttachmentManager.getAttachmentInfo(String) , since that will find also DynamicAttachments.

Specified by:

getDynamicAttachment in interface AttachmentManager

Parameters:

name - The name of the attachment to look for

Returns:

An Attachment, or null.

See Also:

AttachmentManager.getAttachmentInfo(String)

storeAttachment

public void storeAttachment(Attachment att,
InputStream in)
                     throws IOException,
ProviderException

Stores an attachment directly from a stream. If the attachment did not exist previously, this method will create it. If it did exist, it stores a new version.

Specified by:

storeAttachment in interface AttachmentManager

Parameters:

att - Attachment to store this under.

in - InputStream from which the attachment contents will be read.

Throws:

IOException - If writing the attachment failed.

ProviderException - If something else went wrong.

getVersionHistory

public List<Attachment> getVersionHistory(String attachmentName)
                                   throws ProviderException

Returns a list of versions of the attachment.

Specified by:

getVersionHistory in interface AttachmentManager

Parameters:

attachmentName - A fully qualified name of the attachment.

Returns:

A list of Attachments. May return null, if attachments are disabled.

Throws:

ProviderException - If the provider fails for some reason.

getAllAttachments

public Collection<Attachment> getAllAttachments()
                                         throws ProviderException

Returns a collection of Attachments, containing each and every attachment that is in this Wiki.

Specified by:

getAllAttachments in interface AttachmentManager

Returns:

A collection of attachments. If attachments are disabled, will return an empty collection.

Throws:

ProviderException - If something went wrong with the backend

getCurrentProvider

public AttachmentProvider getCurrentProvider()

Returns the current attachment provider.

Specified by:

getCurrentProvider in interface AttachmentManager

Returns:

The current provider. May be null, if attachments are disabled.

deleteVersion

public void deleteVersion(Attachment att)
                   throws ProviderException

Deletes the given attachment version.

Specified by:

deleteVersion in interface AttachmentManager

Parameters:

att - The attachment to delete

Throws:

ProviderException - If something goes wrong with the backend.

deleteAttachment

public void deleteAttachment(Attachment att)
                      throws ProviderException

Deletes all versions of the given attachment.

Specified by:

deleteAttachment in interface AttachmentManager

Parameters:

att - The Attachment to delete.

Throws:

ProviderException - if something goes wrong with the backend.