Package de.xima.fc.file

Class GenericFileDao

java.lang.Object

de.xima.fc.file.GenericFileDao

All Implemented Interfaces:

IGenericFileDao

public class GenericFileDao
extends Object
implements IGenericFileDao

Constructor Summary

Constructors

Constructor	Description
GenericFileDao()

Method Summary

Modifier and Type	Method	Description
<D extends IFileDataEntity<F>,F extends IKeyDependentFileEntity<E,D>,E extends IFileMapProviding<F,D>> byte[]	getFileData(IEntityContext ec, E entity, String fileKey)	Returns the file data of a file belonging to the given entity with the given file key.
<E extends IFileDataEntity<?>,T extends IFileProviding<?,E>> byte[]	getFileData(IEntityContext ec, Class<T> clazz, long id)	Returns the file data of a file entity.
<E extends IFileDataEntity<?>,T extends IFileProviding<?,E>> byte[]	getFileData(IEntityContext ec, T entity)	Returns the file data of a file entity.
<D extends IFileDataEntity<F>,F extends IKeyDependentFileEntity<E,D>,E extends IFileMapProviding<F,D>> D	getFileDataEntity(IEntityContext ec, E entity, String fileKey)	Returns the file data entity of a file belonging to the given entity with the given file key.
<E extends IFileDataEntity<?>,T extends IFileEntity<?,E>> E	getFileDataEntity(IEntityContext ec, T entity)	Get the file data entity for a given file entity.
<T extends IFileEntity<?,?>> byte[]	getFileEntityData(IEntityContext ec, T fileEntity)	Gets the data of the given file entity as an in-memory byte array.
<T extends IFileEntity<?,?>> InputStream	getFileEntityStream(IEntityContext ec, T entity)	Gets the data of the given file entity as an input stream.
<D extends IFileDataEntity<F>,F extends IKeyDependentFileEntity<E,D>,E extends IFileMapProviding<F,D>> InputStream	getFileStream(IEntityContext ec, E entity, String fileKey)	Returns the file data of a file belonging to the given entity with the given file key, as an input stream.
<E extends IFileDataEntity<?>,T extends IFileProviding<?,E>> InputStream	getFileStream(IEntityContext ec, T entity)
<E extends IFileDataEntity<?>,T extends IFileEntity<?,E>> T	updateFileData(IEntityContext ec, T entity, byte[] data)	Replaces the data of the given file entity with the new data.

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericFileDao

public GenericFileDao()

Method Detail

getFileData

public <E extends IFileDataEntity<?>,T extends IFileProviding<?,E>> byte[] getFileData(IEntityContext ec,
                                                                                                   Class<T> clazz,
                                                                                                   long id)

Description copied from interface: IGenericFileDao

Returns the file data of a file entity.

Use with care! As the name suggests, this holds the entire file data in memory. Prefer using an input stream instead.

Specified by:

getFileData in interface IGenericFileDao

Type Parameters:

E - Type of the entity with the file data.

T - Type of the entity with the file meta data.

Parameters:

ec - Entity context for database transactions.

clazz - Type of the file entity with the file meta data.

id - ID of the file entity with the file meta data.

Returns:

The file content as a byte array, or null when no file content was found.

getFileData

public <E extends IFileDataEntity<?>,T extends IFileProviding<?,E>> byte[] getFileData(IEntityContext ec,
                                                                                                   T entity)

Description copied from interface: IGenericFileDao

Returns the file data of a file entity.

Use with care! As the name suggests, this holds the entire file data in memory. Prefer using an input stream instead.

Specified by:

getFileData in interface IGenericFileDao

Type Parameters:

E - Type of the entity with the file data.

T - Type of the entity with the file meta data.

Parameters:

ec - Entity context for database transactions.

entity - File entity with the file meta data.

Returns:

The file content as a byte array.

getFileData

public <D extends IFileDataEntity<F>,F extends IKeyDependentFileEntity<E,D>,E extends IFileMapProviding<F,D>> byte[] getFileData(IEntityContext ec,
                                                                                                                                                         E entity,
                                                                                                                                                         String fileKey)

Description copied from interface: IGenericFileDao

Returns the file data of a file belonging to the given entity with the given file key.

Use with care! As the name suggests, this holds the entire file data in memory. Prefer using an input stream instead.

Specified by:

getFileData in interface IGenericFileDao

Type Parameters:

D - file data entity type

F - file entity type

E - file map providing base entity type

Parameters:

ec - entity context for database transactions.

entity - that owns the file

fileKey - Key identifying the the file to retrieve.

Returns:

The file data as a byte array.

getFileStream

public <D extends IFileDataEntity<F>,F extends IKeyDependentFileEntity<E,D>,E extends IFileMapProviding<F,D>> InputStream getFileStream(IEntityContext ec,
                                                                                                                                                                E entity,
                                                                                                                                                                String fileKey)

Description copied from interface: IGenericFileDao

Returns the file data of a file belonging to the given entity with the given file key, as an input stream.

Specified by:

getFileStream in interface IGenericFileDao

Type Parameters:

D - file data entity type

F - file entity type

E - file map providing base entity type

Parameters:

ec - entity context for database transactions.

entity - that owns the file

fileKey - Key identifying the the file to retrieve.

Returns:

The file data as an input stream.

getFileEntityData

public <T extends IFileEntity<?,?>> byte[] getFileEntityData(IEntityContext ec,
                                                                   T fileEntity)

Description copied from interface: IGenericFileDao

Gets the data of the given file entity as an in-memory byte array.

Use with care! As the name suggests, this holds the entire file data in memory. Prefer using an input stream instead.

Specified by:

getFileEntityData in interface IGenericFileDao

Type Parameters:

T - Type of the file entity with the data.

Parameters:

ec - Entity context for database transactions.

fileEntity - File entity with the data.

Returns:

The data as a byte array, or null if no data exists.

updateFileData

public <E extends IFileDataEntity<?>,T extends IFileEntity<?,E>> T updateFileData(IEntityContext ec,
                                                                                              T entity,
                                                                                              byte[] data)

Description copied from interface: IGenericFileDao

Replaces the data of the given file entity with the new data.

Specified by:

updateFileData in interface IGenericFileDao

Type Parameters:

E - Type of the entity with the file data.

T - Type of the entity with the file meta data.

Parameters:

ec - Entity context for database transactions.

entity - File entity with the file meta data.

data - New data to set.

Returns:

The updated file entity.

getFileDataEntity

public <E extends IFileDataEntity<?>,T extends IFileEntity<?,E>> E getFileDataEntity(IEntityContext ec,
                                                                                                 T entity)

Description copied from interface: IGenericFileDao

Get the file data entity for a given file entity. The entity is read from the database if it is detached.

Specified by:

getFileDataEntity in interface IGenericFileDao

Type Parameters:

E - Type of the entity with the file data.

T - Type of the entity with the file meta data.

Parameters:

ec - Entity context for database transactions.

entity - File entity with the file meta data.

Returns:

The file data entity for the given file entity.

getFileDataEntity

public <D extends IFileDataEntity<F>,F extends IKeyDependentFileEntity<E,D>,E extends IFileMapProviding<F,D>> D getFileDataEntity(IEntityContext ec,
                                                                                                                                                          E entity,
                                                                                                                                                          String fileKey)

Description copied from interface: IGenericFileDao

Returns the file data entity of a file belonging to the given entity with the given file key.

Specified by:

getFileDataEntity in interface IGenericFileDao

Type Parameters:

D - file data entity type

F - file entity type

E - file map providing base entity type

Parameters:

ec - Entity context for database transactions.

entity - that owns the file

fileKey - key identifying the the file entity

Returns:

file data entity containing the data of the request file.

getFileStream

public <E extends IFileDataEntity<?>,T extends IFileProviding<?,E>> InputStream getFileStream(IEntityContext ec,
                                                                                                          T entity)

Specified by:

getFileStream in interface IGenericFileDao

Type Parameters:

E - Type of the entity with the file data.

T - Type of the entity with the file meta data.

Parameters:

ec - Entity context for database transactions.

entity - File entity with the file meta data.

Returns:

The data of the file entity as an input stream, or null when no data exists.

getFileEntityStream

public <T extends IFileEntity<?,?>> InputStream getFileEntityStream(IEntityContext ec,
                                                                          T entity)

Description copied from interface: IGenericFileDao

Gets the data of the given file entity as an input stream.

Specified by:

getFileEntityStream in interface IGenericFileDao

Parameters:

ec - Entity context for database transactions.

entity - File entity with the data.

Returns:

The data as an input stream, or null if no data exists.