/* * 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.IOException;import java.io.OutputStream; import javax.sound.midi.Sequence;import javax.sound.midi.MidiFileFormat; /** * A <code>MidiFileWriter</code> supplies MIDI file-writing services.  Classes * that implement this interface can write one or more types of MIDI file from * a <code>{@link Sequence}</code> object. * * @author Kara Kytle * @since 1.3 */public abstract class MidiFileWriter {      /**     * Obtains the set of MIDI file types for which file writing support is     * provided by this file writer.     * @return array of file types.  If no file types are supported,     * an array of length 0 is returned.     */    public abstract int[] getMidiFileTypes();      /**     * Obtains the file types that this file writer can write from the     * sequence specified.     * @param sequence the sequence for which MIDI file type support     * is queried     * @return array of file types.  If no file types are supported,     * returns an array of length 0.     */    public abstract int[] getMidiFileTypes(Sequence sequence);      /**     * Indicates whether file writing support for the specified MIDI file type     * is provided by this file writer.     * @param fileType the file type for which write capabilities are queried     * @return <code>true</code> if the file type is supported,     * otherwise <code>false</code>     */    public boolean isFileTypeSupported(int fileType) {         int types[] = getMidiFileTypes();        for(int i=0; i<types.length; i++) {            if( fileType == types[i] ) {                return true;            }        }        return false;    }      /**     * Indicates whether a MIDI file of the file type specified can be written     * from the sequence indicated.     * @param fileType the file type for which write capabilities are queried     * @param sequence  the sequence for which file writing support is queried     * @return <code>true</code> if the file type is supported for this sequence,     * otherwise <code>false</code>     */    public boolean isFileTypeSupported(int fileType, Sequence sequence) {         int types[] = getMidiFileTypes( sequence );        for(int i=0; i<types.length; i++) {            if( fileType == types[i] ) {                return true;            }        }        return false;    }      /**     * Writes a stream of bytes representing a MIDI file of the file type     * indicated to the output stream provided.     * @param in sequence containing MIDI data to be written to the file     * @param fileType type of the file to be written to the output stream     * @param out stream to which the file data should be written     * @return the number of bytes written to the output stream     * @throws IOException if an I/O exception occurs     * @throws IllegalArgumentException if the file type is not supported by     * this file writer     * @see #isFileTypeSupported(int, Sequence)     * @see     #getMidiFileTypes(Sequence)     */    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 external file provided.     * @param in sequence containing MIDI data to be written to the external file     * @param fileType type of the file to be written to the external file     * @param out external file to which the file data should be written     * @return the number of bytes written to the file     * @throws IOException if an I/O exception occurs     * @throws IllegalArgumentException if the file type is not supported by     * this file writer     * @see #isFileTypeSupported(int, Sequence)     * @see     #getMidiFileTypes(Sequence)     */    public abstract int write(Sequence in, int fileType, File out) throws IOException;}