Class FileEntityPersistenceAdapter<File extends IFileEntity<?,Data> & IFileSizeProviding, Data extends IFileDataEntity<File>, Context>

java.lang.Object

de.xima.fc.logic.filesystem.FileEntityPersistenceAdapter<File,Data,Context>

Type Parameters:

File - The type of the file entity.

Data - The type of the file data entity.

Context - The type of the context for the entities.

All Implemented Interfaces:

ICrudPersistenceAdapter<IEntityContext, File>, IFileDataPersistenceAdapter<IEntityContext, File>, IScopedEntityPersistenceAdapter<IEntityContext, File, Context>, IEntityFileSystemPersistenceAdapter<IEntityContext, File, Context>, Serializable

public abstract class FileEntityPersistenceAdapter<File extends IFileEntity<?,Data> & IFileSizeProviding, Data extends IFileDataEntity<File>, Context>
extends Object
implements IEntityFileSystemPersistenceAdapter<IEntityContext, File, Context>

A file entity adapter for a general file entity.

See Also:

• Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	FileEntityPersistenceAdapter(Class<File> fileEntityType, Class<Data> fileDataEntityType)	Creates a file entity adapter for a general file entity.

Method Summary

Modifier and Type	Method	Description
final File	create(IEntityContext ec, File file)	Persists the file entity in the database and returns the persisted entity.
protected abstract de.xima.cmn.criteria.FilterCriterion	createContextualFilter(Context context)
final void	delete(IEntityContext ec, File fileEntity)	Deletes the file entity and all its children (such as file data).
protected boolean	ignoreLockingVersion()
final List<File>	list(IEntityContext ec, Context context)	Reads all file entities that exist in the given context.
final InputStream	openForRead(Supplier<IEntityContext> ec, File fileEntity)	Opens an input stream to the content of a file entity.
final OutputStream	openForWrite(Supplier<IEntityContext> ec, File fileEntity)	Opens an output stream for changing the content of a file entity.
final File	read(IEntityContext ec, File file)	Reads the entity from the persistence layer, returning a fresh version of the entity.
final File	update(IEntityContext ec, File file)	Updates the file entity in the persistence layer and returns the updated entity.

Methods inherited from class Object

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

Constructor Details

FileEntityPersistenceAdapter

protected FileEntityPersistenceAdapter(Class<File> fileEntityType,
 Class<Data> fileDataEntityType)

Creates a file entity adapter for a general file entity.

Parameters:

fileEntityType - The type of the file entity.

fileDataEntityType - The type of the file data entity.

Method Details

create

public final File create(IEntityContext ec,
 File file)

Description copied from interface: ICrudPersistenceAdapter

Persists the file entity in the database and returns the persisted entity.

Specified by:

create in interface ICrudPersistenceAdapter<File extends IFileEntity<?,Data> & IFileSizeProviding, Data extends IFileDataEntity<File>>

Parameters:

ec - Persistence context to use for accessing the database.

file - The entity to create.

Returns:

The persisted entity.

delete

public final void delete(IEntityContext ec,
 File fileEntity)

Description copied from interface: ICrudPersistenceAdapter

Deletes the file entity and all its children (such as file data).

Specified by:

delete in interface ICrudPersistenceAdapter<File extends IFileEntity<?,Data> & IFileSizeProviding, Data extends IFileDataEntity<File>>

Parameters:

ec - Persistence context to use for accessing the persistence layer.

fileEntity - The entity to delete.

list

public final List<File> list(IEntityContext ec,
 Context context)

Description copied from interface: IScopedEntityPersistenceAdapter

Reads all file entities that exist in the given context.

Specified by:

list in interface IScopedEntityPersistenceAdapter<File extends IFileEntity<?,Data> & IFileSizeProviding, Data extends IFileDataEntity<File>, Context>

Parameters:

ec - Persistence context to use for accessing the persistence layer.

context - The context in which to read the entities, such as a client or project.

Returns:

A list of all file entities in the context.

openForRead

public final InputStream openForRead(Supplier<IEntityContext> ec,
 File fileEntity)
                              throws IOException

Description copied from interface: IFileDataPersistenceAdapter

Opens an input stream to the content of a file entity.

Specified by:

openForRead in interface IFileDataPersistenceAdapter<File extends IFileEntity<?,Data> & IFileSizeProviding, Data extends IFileDataEntity<File>>

Parameters:

ec - Persistence context factory to use for accessing the persistence layer.

fileEntity - The entity to open.

Returns:

An input stream to the file content.

Throws:

IOException - If an error occurs while opening the file.

openForWrite

public final OutputStream openForWrite(Supplier<IEntityContext> ec,
 File fileEntity)
                                throws IOException

Description copied from interface: IFileDataPersistenceAdapter

Opens an output stream for changing the content of a file entity. This should also update the file metadata, such as the user who last modified the file and the last modified time.

Specified by:

openForWrite in interface IFileDataPersistenceAdapter<File extends IFileEntity<?,Data> & IFileSizeProviding, Data extends IFileDataEntity<File>>

Parameters:

ec - Persistence context factory to use for accessing the persistence layer.

fileEntity - The entity to open.

Returns:

An output stream to the file content.

Throws:

IOException - If an error occurs while opening the file.

read

public final File read(IEntityContext ec,
 File file)

Description copied from interface: ICrudPersistenceAdapter

Reads the entity from the persistence layer, returning a fresh version of the entity.

Specified by:

read in interface ICrudPersistenceAdapter<File extends IFileEntity<?,Data> & IFileSizeProviding, Data extends IFileDataEntity<File>>

Parameters:

ec - Persistence context to use for accessing the persistence layer.

file - The entity to read.

Returns:

The entity read from the persistence layer.

update

public final File update(IEntityContext ec,
 File file)

Description copied from interface: ICrudPersistenceAdapter

Updates the file entity in the persistence layer and returns the updated entity.

Specified by:

update in interface ICrudPersistenceAdapter<File extends IFileEntity<?,Data> & IFileSizeProviding, Data extends IFileDataEntity<File>>

Parameters:

ec - Persistence context to use for accessing the database.

file - The entity to update.

Returns:

The updated entity.

createContextualFilter

protected abstract de.xima.cmn.criteria.FilterCriterion createContextualFilter(Context context)

ignoreLockingVersion

protected boolean ignoreLockingVersion()