Module java.desktop

Package javax.sound.midi.spi

Class MidiFileWriter

java.lang.Object

javax.sound.midi.spi.MidiFileWriter

public abstract class MidiFileWriter
extends Object

A MidiFileWriter supplies MIDI file-writing services. Classes that implement this interface can write one or more types of MIDI file from a Sequence object.

Since:

1.3

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	MidiFileWriter()	Constructor for subclasses to call.

Method Summary

Modifier and Type	Method	Description
abstract int[]	getMidiFileTypes()	Obtains the set of MIDI file types for which file writing support is provided by this file writer.
abstract int[]	getMidiFileTypes(Sequence sequence)	Obtains the file types that this file writer can write from the sequence specified.
boolean	isFileTypeSupported(int fileType)	Indicates whether file writing support for the specified MIDI file type is provided by this file writer.
boolean	isFileTypeSupported(int fileType, Sequence sequence)	Indicates whether a MIDI file of the file type specified can be written from the sequence indicated.
abstract int	write(Sequence in, int fileType, File out)	Writes a stream of bytes representing a MIDI file of the file type indicated to the external file provided.
abstract int	write(Sequence in, int fileType, OutputStream out)	Writes a stream of bytes representing a MIDI file of the file type indicated to the output stream provided.

Methods declared in class java.lang.Object

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

Constructor Details

MidiFileWriter

protected MidiFileWriter()

Constructor for subclasses to call.

Method Details

getMidiFileTypes

public abstract int[] getMidiFileTypes()

Obtains the set of MIDI file types for which file writing support is provided by this file writer.

Returns:

array of file types. If no file types are supported, an array of length 0 is returned.

getMidiFileTypes

public abstract int[] getMidiFileTypes(Sequence sequence)

Obtains the file types that this file writer can write from the sequence specified.

Parameters:

sequence - the sequence for which MIDI file type support is queried

Returns:

array of file types. If no file types are supported, returns an array of length 0.

Throws:

NullPointerException - if sequence is null

isFileTypeSupported

public boolean isFileTypeSupported(int fileType)

Indicates whether file writing support for the specified MIDI file type is provided by this file writer.

Parameters:

fileType - the file type for which write capabilities are queried

Returns:

true if the file type is supported, otherwise false

isFileTypeSupported

public boolean isFileTypeSupported(int fileType,
 Sequence sequence)

Indicates whether a MIDI file of the file type specified can be written from the sequence indicated.

Parameters:

fileType - the file type for which write capabilities are queried

sequence - the sequence for which file writing support is queried

Returns:

true if the file type is supported for this sequence, otherwise false

Throws:

NullPointerException - if sequence is null

write

public abstract int write(Sequence in,
 int fileType,
 OutputStream out)
                   throws IOException

Writes a stream of bytes representing a MIDI file of the file type indicated to the output stream provided.

Parameters:

in - sequence containing MIDI data to be written to the file

fileType - type of the file to be written to the output stream

out - stream to which the file data should be written

Returns:

the number of bytes written to the output stream

Throws:

IOException - if an I/O exception occurs

IllegalArgumentException - if the file type is not supported by this file writer

NullPointerException - if in or out are null

See Also:

• isFileTypeSupported(int, Sequence)
• getMidiFileTypes(Sequence)

write

public abstract int write(Sequence in,
 int fileType,
 File out)
                   throws IOException

Writes a stream of bytes representing a MIDI file of the file type indicated to the external file provided.

Parameters:

in - sequence containing MIDI data to be written to the external file

fileType - type of the file to be written to the external file

out - external file to which the file data should be written

Returns:

the number of bytes written to the file

Throws:

IOException - if an I/O exception occurs

IllegalArgumentException - if the file type is not supported by this file writer

NullPointerException - if in or out are null

See Also:

• isFileTypeSupported(int, Sequence)
• getMidiFileTypes(Sequence)