Package org.deltava.beans

Class DatabaseBlobBean

java.lang.Object

org.deltava.beans.DatabaseBean

org.deltava.beans.DatabaseBlobBean

All Implemented Interfaces:

Serializable, Comparable<Object>, IDBean, Cacheable

Direct Known Subclasses:

AbstractComment, ACARSError, DatabaseDocumentBean, ImageBean, Person, SignatureImage

public abstract class DatabaseBlobBean
extends DatabaseBean

An abstract class to implement support for image/file buffers in a bean.

Since:

1.0

Version:

7.5

Author:

Luke

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected byte[]	_buffer	The buffer for the image/file data.

Constructor Summary

Constructors

Constructor	Description
DatabaseBlobBean()

Method Summary

Modifier and Type	Method	Description
void	clear()	Clears the buffer.
InputStream	getInputStream()	Returns the content of the buffer.
int	getSize()	Returns the size of the image/file data.
boolean	isLoaded()	Returns whether the buffer has been populated.
void	load(byte[] buffer)	Replaces the buffer data.
void	load(InputStream is)	Loads the contents of a stream into the buffer.

Methods inherited from class org.deltava.beans.DatabaseBean

cacheKey, compareTo, equals, getHexID, getID, hashCode, setID, validateID, validateID

Methods inherited from class java.lang.Object

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

Field Details

_buffer

protected byte[] _buffer

The buffer for the image/file data.

Constructor Details

DatabaseBlobBean

public DatabaseBlobBean()

Method Details

isLoaded

public boolean isLoaded()

Returns whether the buffer has been populated.

Returns:

TRUE if the buffer has any data, otherwise FALSE

getInputStream

public InputStream getInputStream()

Returns the content of the buffer. There is no requirement that beans implementing a buffer populate the buffer except when necessary.

Returns:

an InputStream with the buffer's contents, or an empty stream if the buffer is null

See Also:

• isLoaded()

getSize

public int getSize()

Returns the size of the image/file data.

Returns:

the size of the data, in bytes. If the buffer is not initialized, returns -1

See Also:

• isLoaded()

load

public void load(InputStream is)
          throws IOException

Loads the contents of a stream into the buffer. The data should be available at the specified input stream, and the stream is not closed when this method completes.

Parameters:

is - the stream containing the data

Throws:

IOException - if an error occurs reading the stream data

See Also:

• load(byte[])

load

public void load(byte[] buffer)

Replaces the buffer data.

Parameters:

buffer - the new buffer data

See Also:

• load(InputStream)

clear

public void clear()

Clears the buffer.