/*

 * Copyright (c) 1999, 2014, 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;

/**

 * A {@code MidiFileWriter} supplies MIDI file-writing services. Classes that

 * implement this interface can write one or more types of MIDI file from a

 * {@link Sequence} 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} if the file type is supported, otherwise

     *         {@code false}

     */

    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} if the file type is supported for this sequence,

     *         otherwise {@code false}

     */

    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;

}