/**************************************************************************
* Copyright (c) 2004 by Chris Gray, /k/ Embedded Java Solutions. *
* All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* 1. Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* 2. Redistributions in binary form must reproduce the above copyright *
* notice, this list of conditions and the following disclaimer in the *
* documentation and/or other materials provided with the distribution. *
* 3. Neither the name of /k/ Embedded Java Solutions nor the names of *
* other contributors may be used to endorse or promote products *
* derived from this software without specific prior written permission.*
* *
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED *
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF *
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. *
* IN NO EVENT SHALL /K/ EMBEDDED JAVA SOLUTIONS OR OTHER CONTRIBUTORS BE *
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR *
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF *
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR *
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, *
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE *
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN *
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
**************************************************************************/
package com.acunia.wonka.rudolph;
/**
** Determines the beep implementation to be used and instantiates it.
*/
class BeepFactory {
/**
** The name of the system property which holds the name of the class which must be used to implement Toolkit.beep().
*/
static final String BEEP_CLASS_PROPERTY = "wonka.rudolph.beep.impl";
/**
** The default value of BEEP_CLASS_PROPERTY.
*/
static final String BEEP_CLASS_DEFAULT = "com.acunia.wonka.rudolph.DefaultBeep";
/**
** The duration of the beep in milliseconds.
*/
static final String BEEP_DURATION_PROPERTY = "wonka.rudolph.beep.duration";
/**
** The default value of BEEP_DURATION_PROPERTY.
*/
static final int BEEP_DURATION_DEFAULT = 200;
/**
** The volume of the beep, on a scale from 0 (silence) to 100.
*/
static final String BEEP_VOLUME_PROPERTY = "wonka.rudolph.beep.volume";
/**
** The default value of BEEP_VOLUME_PROPERTY.
*/
static final int BEEP_VOLUME_DEFAULT = 100;
/**
** The freqiency of the beep, in Hertz.
*/
static final String BEEP_FREQUENCY_PROPERTY = "wonka.rudolph.beep.frequency";
/**
** The default value of BEEP_FREQUENCY_PROPERTY.
*/
static final int BEEP_FREQUENCY_DEFAULT = 1000;
/**
** The object to which Toolkit.beep() will delegate.
*/
private static BeepImpl theBeep;
/**
** Get the object to which Toolkit.beep() will delegate.
** It will be created if it does not already exist.
*/
static synchronized BeepImpl getInstance() {
String beep_class_name = null;
Class cl = null;
if (theBeep == null) {
try {
beep_class_name = System.getProperty(BEEP_CLASS_PROPERTY, BEEP_CLASS_DEFAULT).trim();
cl = Class.forName(beep_class_name);
int d = Integer.getInteger(BEEP_DURATION_PROPERTY, BEEP_DURATION_DEFAULT).intValue();
int v = Integer.getInteger(BEEP_VOLUME_PROPERTY, BEEP_VOLUME_DEFAULT).intValue();
int f = Integer.getInteger(BEEP_FREQUENCY_PROPERTY, BEEP_FREQUENCY_DEFAULT).intValue();
theBeep = (BeepImpl)cl.newInstance();
theBeep.setDuration(d);
theBeep.setVolume(v);
theBeep.setFrequency(f);
}
catch (ClassNotFoundException cnfe) {
System.err.println("Rudolph: failed to load beep implementation class " + beep_class_name);
}
catch (Exception e) {
e.printStackTrace();
}
}
return theBeep;
}
}