author | serb |
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/* |
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* Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.sound.midi.spi; |
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import java.io.File; |
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import java.io.IOException; |
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import java.io.OutputStream; |
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import java.util.Arrays; |
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import javax.sound.midi.Sequence; |
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/** |
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* A {@code MidiFileWriter} supplies MIDI file-writing services. Classes that |
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* implement this interface can write one or more types of MIDI file from a |
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* {@link Sequence} object. |
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* |
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* @author Kara Kytle |
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* @since 1.3 |
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*/ |
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public abstract class MidiFileWriter { |
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/** |
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* Obtains the set of MIDI file types for which file writing support is |
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* provided by this file writer. |
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* |
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* @return array of file types. If no file types are supported, an array of |
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* length 0 is returned. |
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*/ |
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public abstract int[] getMidiFileTypes(); |
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/** |
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* Obtains the file types that this file writer can write from the sequence |
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* specified. |
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* |
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* @param sequence the sequence for which MIDI file type support is queried |
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* @return array of file types. If no file types are supported, returns an |
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* array of length 0. |
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* @throws NullPointerException if {@code sequence} is {@code null} |
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*/ |
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public abstract int[] getMidiFileTypes(Sequence sequence); |
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/** |
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* Indicates whether file writing support for the specified MIDI file type |
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* is provided by this file writer. |
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* |
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* @param fileType the file type for which write capabilities are queried |
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* @return {@code true} if the file type is supported, otherwise |
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* {@code false} |
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*/ |
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public boolean isFileTypeSupported(final int fileType) { |
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return Arrays.stream(getMidiFileTypes()) |
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.anyMatch(type -> fileType == type); |
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} |
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/** |
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* Indicates whether a MIDI file of the file type specified can be written |
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* from the sequence indicated. |
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* |
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* @param fileType the file type for which write capabilities are queried |
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* @param sequence the sequence for which file writing support is queried |
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* @return {@code true} if the file type is supported for this sequence, |
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* otherwise {@code false} |
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* @throws NullPointerException if {@code sequence} is {@code null} |
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*/ |
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public boolean isFileTypeSupported(final int fileType, |
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final Sequence sequence) { |
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return Arrays.stream(getMidiFileTypes(sequence)) |
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.anyMatch(type -> fileType == type); |
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} |
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/** |
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* Writes a stream of bytes representing a MIDI file of the file type |
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* indicated to the output stream provided. |
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* |
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* @param in sequence containing MIDI data to be written to the file |
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* @param fileType type of the file to be written to the output stream |
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* @param out stream to which the file data should be written |
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* @return the number of bytes written to the output stream |
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* @throws IOException if an I/O exception occurs |
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* @throws IllegalArgumentException if the file type is not supported by |
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* this file writer |
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* @throws NullPointerException if {@code in} or {@code out} are |
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* {@code null} |
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* @see #isFileTypeSupported(int, Sequence) |
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* @see #getMidiFileTypes(Sequence) |
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*/ |
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public abstract int write(Sequence in, int fileType, OutputStream out) |
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throws IOException; |
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/** |
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* Writes a stream of bytes representing a MIDI file of the file type |
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* indicated to the external file provided. |
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* |
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* @param in sequence containing MIDI data to be written to the external |
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* file |
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* @param fileType type of the file to be written to the external file |
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* @param out external file to which the file data should be written |
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* @return the number of bytes written to the file |
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* @throws IOException if an I/O exception occurs |
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* @throws IllegalArgumentException if the file type is not supported by |
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* this file writer |
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* @throws NullPointerException if {@code in} or {@code out} are |
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* {@code null} |
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* @see #isFileTypeSupported(int, Sequence) |
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* @see #getMidiFileTypes(Sequence) |
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*/ |
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public abstract int write(Sequence in, int fileType, File out) |
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throws IOException; |
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} |