1 /*
2 * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
27
28 import java.io.File;
29 import java.io.IOException;
30 import java.io.InputStream;
31 import java.net.URL;
32
33 import javax.sound.midi.InvalidMidiDataException;
34 import javax.sound.midi.MidiFileFormat;
35 import javax.sound.midi.Sequence;
36
37 /**
38 * A {@code MidiFileReader} supplies MIDI file-reading services. Classes
39 * implementing this interface can parse the format information from one or more
40 * types of MIDI file, and can produce a {@link Sequence} object from files of
41 * these types.
42 *
43 * @author Kara Kytle
44 * @since 1.3
45 */
46 public abstract class MidiFileReader {
47
48 /**
49 * Obtains the MIDI file format of the input stream provided. The stream
50 * must point to valid MIDI file data. In general, MIDI file readers may
51 * need to read some data from the stream before determining whether they
52 * support it. These parsers must be able to mark the stream, read enough
53 * data to determine whether they support the stream, and, if not, reset the
54 * stream's read pointer to its original position. If the input stream does
55 * not support this, this method may fail with an {@code IOException}.
56 *
57 * @param stream the input stream from which file format information should
58 * be extracted
59 * @return a {@code MidiFileFormat} object describing the MIDI file format
60 * @throws InvalidMidiDataException if the stream does not point to valid
61 * MIDI file data recognized by the system
62 * @throws IOException if an I/O exception occurs
63 * @throws NullPointerException if {@code stream} is {@code null}
64 * @see InputStream#markSupported
65 * @see InputStream#mark
66 */
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1 /*
2 * Copyright (c) 1999, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
27
28 import java.io.File;
29 import java.io.IOException;
30 import java.io.InputStream;
31 import java.net.URL;
32
33 import javax.sound.midi.InvalidMidiDataException;
34 import javax.sound.midi.MidiFileFormat;
35 import javax.sound.midi.Sequence;
36
37 /**
38 * A {@code MidiFileReader} supplies MIDI file-reading services. Classes
39 * implementing this interface can parse the format information from one or more
40 * types of MIDI file, and can produce a {@link Sequence} object from files of
41 * these types.
42 *
43 * @author Kara Kytle
44 * @since 1.3
45 */
46 public abstract class MidiFileReader {
47
48 /**
49 * Constructs a {@code MidiFileReader}.
50 */
51 protected MidiFileReader() {}
52
53 /**
54 * Obtains the MIDI file format of the input stream provided. The stream
55 * must point to valid MIDI file data. In general, MIDI file readers may
56 * need to read some data from the stream before determining whether they
57 * support it. These parsers must be able to mark the stream, read enough
58 * data to determine whether they support the stream, and, if not, reset the
59 * stream's read pointer to its original position. If the input stream does
60 * not support this, this method may fail with an {@code IOException}.
61 *
62 * @param stream the input stream from which file format information should
63 * be extracted
64 * @return a {@code MidiFileFormat} object describing the MIDI file format
65 * @throws InvalidMidiDataException if the stream does not point to valid
66 * MIDI file data recognized by the system
67 * @throws IOException if an I/O exception occurs
68 * @throws NullPointerException if {@code stream} is {@code null}
69 * @see InputStream#markSupported
70 * @see InputStream#mark
71 */
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