1 /*
   2  * Copyright (c) 2002, 2013, 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
  23  * questions.
  24  */
  25 
  26 package com.sun.media.sound;
  27 
  28 import javax.sound.midi.InvalidMidiDataException;
  29 import javax.sound.midi.SysexMessage;
  30 
  31 /**
  32  * optimized FastSysexMessage that doesn't copy the array upon instantiation.
  33  *
  34  * @author Florian Bomers
  35  */
  36 final class FastSysexMessage extends SysexMessage {
  37 
  38     FastSysexMessage(byte[] data) throws InvalidMidiDataException {
  39         super(data);
  40         if (data.length==0 || (((data[0] & 0xFF) != 0xF0) && ((data[0] & 0xFF) != 0xF7))) {
  41             super.setMessage(data, data.length); // will throw Exception
  42         }
  43     }
  44 
  45     /**
  46      * The returned array may be larger than this message is.
  47      * Use getLength() to get the real length of the message.
  48      */
  49     byte[] getReadOnlyMessage() {
  50         return data;
  51     }
  52 
  53     // overwrite this method so that the original data array,
  54     // which is shared among all transmitters, cannot be modified
  55     @Override
  56     public void setMessage(byte[] data, int length) throws InvalidMidiDataException {
  57         if ((data.length == 0) || (((data[0] & 0xFF) != 0xF0) && ((data[0] & 0xFF) != 0xF7))) {
  58             super.setMessage(data, data.length); // will throw Exception
  59         }
  60         this.length = length;
  61         this.data = new byte[this.length];
  62         System.arraycopy(data, 0, this.data, 0, length);
  63     }
  64 
  65 } // class FastSysexMessage