- java.lang.Object
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- javax.sound.midi.spi.MidiFileReader
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public abstract class MidiFileReader extends Object
AMidiFileReader
supplies MIDI file-reading services. Classes implementing this interface can parse the format information from one or more types of MIDI file, and can produce aSequence
object from files of these types.- Since:
- 1.3
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Constructor Summary
Constructors Constructor and Description MidiFileReader()
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Method Summary
Methods Modifier and Type Method and Description abstract MidiFileFormat
getMidiFileFormat(File file)
Obtains the MIDI file format of theFile
provided.abstract MidiFileFormat
getMidiFileFormat(InputStream stream)
Obtains the MIDI file format of the input stream provided.abstract MidiFileFormat
getMidiFileFormat(URL url)
Obtains the MIDI file format of the URL provided.abstract Sequence
getSequence(File file)
Obtains a MIDI sequence from theFile
provided.abstract Sequence
getSequence(InputStream stream)
Obtains a MIDI sequence from the input stream provided.abstract Sequence
getSequence(URL url)
Obtains a MIDI sequence from the URL provided.
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Method Detail
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getMidiFileFormat
public abstract MidiFileFormat getMidiFileFormat(InputStream stream) throws InvalidMidiDataException, IOException
Obtains the MIDI file format of the input stream provided. The stream must point to valid MIDI file data. In general, MIDI file readers may need to read some data from the stream before determining whether they support it. These parsers must be able to mark the stream, read enough data to determine whether they support the stream, and, if not, reset the stream's read pointer to its original position. If the input stream does not support this, this method may fail with anIOException
.- Parameters:
stream
- the input stream from which file format information should be extracted- Returns:
- a
MidiFileFormat
object describing the MIDI file format - Throws:
InvalidMidiDataException
- if the stream does not point to valid MIDI file data recognized by the systemIOException
- if an I/O exception occurs- See Also:
InputStream.markSupported()
,InputStream.mark(int)
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getMidiFileFormat
public abstract MidiFileFormat getMidiFileFormat(URL url) throws InvalidMidiDataException, IOException
Obtains the MIDI file format of the URL provided. The URL must point to valid MIDI file data.- Parameters:
url
- the URL from which file format information should be extracted- Returns:
- a
MidiFileFormat
object describing the MIDI file format - Throws:
InvalidMidiDataException
- if the URL does not point to valid MIDI file data recognized by the systemIOException
- if an I/O exception occurs
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getMidiFileFormat
public abstract MidiFileFormat getMidiFileFormat(File file) throws InvalidMidiDataException, IOException
Obtains the MIDI file format of theFile
provided. TheFile
must point to valid MIDI file data.- Parameters:
file
- theFile
from which file format information should be extracted- Returns:
- a
MidiFileFormat
object describing the MIDI file format - Throws:
InvalidMidiDataException
- if theFile
does not point to valid MIDI file data recognized by the systemIOException
- if an I/O exception occurs
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getSequence
public abstract Sequence getSequence(InputStream stream) throws InvalidMidiDataException, IOException
Obtains a MIDI sequence from the input stream provided. The stream must point to valid MIDI file data. In general, MIDI file readers may need to read some data from the stream before determining whether they support it. These parsers must be able to mark the stream, read enough data to determine whether they support the stream, and, if not, reset the stream's read pointer to its original position. If the input stream does not support this, this method may fail with an IOException.- Parameters:
stream
- the input stream from which theSequence
should be constructed- Returns:
- a
Sequence
object based on the MIDI file data contained in the input stream. - Throws:
InvalidMidiDataException
- if the stream does not point to valid MIDI file data recognized by the systemIOException
- if an I/O exception occurs- See Also:
InputStream.markSupported()
,InputStream.mark(int)
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getSequence
public abstract Sequence getSequence(URL url) throws InvalidMidiDataException, IOException
Obtains a MIDI sequence from the URL provided. The URL must point to valid MIDI file data.- Parameters:
url
- the URL for which theSequence
should be constructed- Returns:
- a
Sequence
object based on the MIDI file data pointed to by the URL - Throws:
InvalidMidiDataException
- if the URL does not point to valid MIDI file data recognized by the systemIOException
- if an I/O exception occurs
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getSequence
public abstract Sequence getSequence(File file) throws InvalidMidiDataException, IOException
Obtains a MIDI sequence from theFile
provided. TheFile
must point to valid MIDI file data.- Parameters:
file
- theFile
from which theSequence
should be constructed- Returns:
- a
Sequence
object based on the MIDI file data pointed to by theFile
- Throws:
InvalidMidiDataException
- if theFile
does not point to valid MIDI file data recognized by the systemIOException
- if an I/O exception occurs
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