/*
* Copyright (c) 1999, 2002, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javax.sound.midi.spi;
import java.io.File;
import java.io.InputStream;
import java.io.IOException;
import java.net.URL;
import javax.sound.midi.MidiFileFormat;
import javax.sound.midi.Sequence;
import javax.sound.midi.InvalidMidiDataException;
/**
* A <code>MidiFileReader</code> 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 a <code>Sequence</code> object from files of these types.
*
* @author Kara Kytle
* @since 1.3
*/
public abstract class MidiFileReader {
/**
* 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 an <code>IOException</code>.
* @param stream the input stream from which file format information should be
* extracted
* @return a <code>MidiFileFormat</code> object describing the MIDI file format
* @throws InvalidMidiDataException if the stream does not point to valid MIDI
* file data recognized by the system
* @throws IOException if an I/O exception occurs
* @see InputStream#markSupported
* @see InputStream#mark
*/
public abstract MidiFileFormat getMidiFileFormat(InputStream stream) throws InvalidMidiDataException, IOException;
/**
* Obtains the MIDI file format of the URL provided. The URL must
* point to valid MIDI file data.
* @param url the URL from which file format information should be
* extracted
* @return a <code>MidiFileFormat</code> object describing the MIDI file format
* @throws InvalidMidiDataException if the URL does not point to valid MIDI
* file data recognized by the system
* @throws IOException if an I/O exception occurs
*/
public abstract MidiFileFormat getMidiFileFormat(URL url) throws InvalidMidiDataException, IOException;
/**
* Obtains the MIDI file format of the <code>File</code> provided.
* The <code>File</code> must point to valid MIDI file data.
* @param file the <code>File</code> from which file format information should be
* extracted
* @return a <code>MidiFileFormat</code> object describing the MIDI file format
* @throws InvalidMidiDataException if the <code>File</code> does not point to valid MIDI
* file data recognized by the system
* @throws IOException if an I/O exception occurs
*/
public abstract MidiFileFormat getMidiFileFormat(File file) 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.
* @param stream the input stream from which the <code>Sequence</code> should be
* constructed
* @return a <code>Sequence</code> 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 system
* @throws IOException if an I/O exception occurs
* @see InputStream#markSupported
* @see InputStream#mark
*/
public abstract Sequence getSequence(InputStream stream) throws InvalidMidiDataException, IOException;
/**
* Obtains a MIDI sequence from the URL provided. The URL must
* point to valid MIDI file data.
* @param url the URL for which the <code>Sequence</code> should be
* constructed
* @return a <code>Sequence</code> 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 system
* @throws IOException if an I/O exception occurs
*/
public abstract Sequence getSequence(URL url) throws InvalidMidiDataException, IOException;
/**
* Obtains a MIDI sequence from the <code>File</code> provided. The <code>File</code> must
* point to valid MIDI file data.
* @param file the <code>File</code> from which the <code>Sequence</code> should be
* constructed
* @return a <code>Sequence</code> object based on the MIDI file data pointed
* to by the <code>File</code>
* @throws InvalidMidiDataException if the <code>File</code> does not point to valid MIDI
* file data recognized by the system
* @throws IOException if an I/O exception occurs
*/
public abstract Sequence getSequence(File file) throws InvalidMidiDataException, IOException;
}