com.atlassian.confluence.pages.persistence.dao
Interface AttachmentDataDao

All Known Subinterfaces:

NonTransactionalAttachmentDataDao, TransactionalAttachmentDataDao

All Known Implementing Classes:

FileSystemAttachmentDataDao, HibernateAttachmentDataDao

public interface AttachmentDataDao

This interface defines the methods for classes acting as a DAO at the level of data storage for Attachments.

Method Summary

void	afterMigrationFrom() Perform any tasks necessary after Attachment data has been moved from this data store to another.
InputStream	getDataForAttachment(Attachment attachment) Grabs the AttachmentData object for an Attachment
void	moveAttachment(Attachment attachment, Attachment oldAttachment, ContentEntityObject newContent) Moves an attachment to a new file name or content object
void	prepareForMigrationTo() Prepare the data store for a migration from another type of data store.
void	removeDataForAttachment(Attachment attachment, ContentEntityObject originalContent) Removes all attachment data for an attachment
void	replaceDataForAttachment(Attachment attachment, InputStream data) Sets the data for attachment This method will overwrite any existing data for the attachment.
void	saveDataForAttachment(Attachment attachment, InputStream data) Saves data to the attachment data store
void	saveDataForAttachmentVersion(Attachment attachment, Attachment previousVersion, InputStream data) Saves data to the attachment data store, for an attachment that has been updated.

Method Detail

getDataForAttachment

public InputStream getDataForAttachment(Attachment attachment)
                                 throws AttachmentDataNotFoundException

Grabs the AttachmentData object for an Attachment

Parameters:

attachment - the Attachment representing the data

Returns:

an AttachmentData object

Throws:

IllegalArgumentException - if attachment is null

AttachmentDataNotFoundException - if no data was found

removeDataForAttachment

public void removeDataForAttachment(Attachment attachment,
                                    ContentEntityObject originalContent)

Removes all attachment data for an attachment

Parameters:

attachment - The attachment for which data should be removed

originalContent - The content the attachment belongs to

Throws:

IllegalArgumentException - if attachment is null

saveDataForAttachment

public void saveDataForAttachment(Attachment attachment,
                                  InputStream data)

Saves data to the attachment data store

Parameters:

attachment - the Attachment the data belongs to

data - the InputStream to be written

Throws:

IllegalArgumentException - if attachment is null

IllegalArgumentException - if data is null

saveDataForAttachmentVersion

public void saveDataForAttachmentVersion(Attachment attachment,
                                         Attachment previousVersion,
                                         InputStream data)

Saves data to the attachment data store, for an attachment that has been updated.

This method assumes that the attachment has already been saved.

Parameters:

attachment - the new version of the attachment

previousVersion - the previous version of the attachment

data - the InputStream representing the data

replaceDataForAttachment

public void replaceDataForAttachment(Attachment attachment,
                                     InputStream data)

Sets the data for attachment This method will overwrite any existing data for the attachment.

Parameters:

attachment - Attachment the data belongs to

data - the data to be saved

moveAttachment

public void moveAttachment(Attachment attachment,
                           Attachment oldAttachment,
                           ContentEntityObject newContent)

Moves an attachment to a new file name or content object

Parameters:

attachment - the Attachment to be moved

oldAttachment - the original version of the attachment

newContent - the new content the Attachment belongs to

Throws:

IllegalArgumentException - if attachment is null

IllegalArgumentException - if newFileName is null

IllegalArgumentException - if newContent is null

prepareForMigrationTo

public void prepareForMigrationTo()

Prepare the data store for a migration from another type of data store.

Classes implementing this method will perform any tasks necessary to allow the data store to be used.

Throws:

RuntimeException - if there was a problem

afterMigrationFrom

public void afterMigrationFrom()

Perform any tasks necessary after Attachment data has been moved from this data store to another.

Throws:

RuntimeException - if there was a problem