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/*******************************************************************************
* Copyright (c) 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.examples.core.midi.launcher;
import java.io.BufferedInputStream;
import java.io.IOException;
import javax.sound.midi.InvalidMidiDataException;
import javax.sound.midi.MidiFileFormat;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Sequencer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.ILaunch;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.model.LaunchConfigurationDelegate;
import org.eclipse.debug.examples.core.pda.DebugCorePlugin;
/**
* Creates and starts a MIDI sequencer.
*
* @since 1.0
*/
public class MidiLaunchDelegate extends LaunchConfigurationDelegate {
/**
* Identifier for the MIDI launch configuration type
* (value <code>midi.launchType</code>)
*/
public static final String ID_MIDI_LAUNCH_CONFIGURATION_TYPE = "midi.launchType";
/**
* Launch configuration attribute for the MIDI file to play
* (value <code>midi.file</code>)
*/
public static final String ATTR_MIDI_FILE = "midi.file";
/* (non-Javadoc)
* @see org.eclipse.debug.core.model.ILaunchConfigurationDelegate#launch(org.eclipse.debug.core.ILaunchConfiguration, java.lang.String, org.eclipse.debug.core.ILaunch, org.eclipse.core.runtime.IProgressMonitor)
*/
public void launch(ILaunchConfiguration configuration, String mode, ILaunch launch, IProgressMonitor monitor) throws CoreException {
String fileName = configuration.getAttribute(ATTR_MIDI_FILE, (String)null);
if (fileName == null) {
abort("MIDI file not specified.", null);
}
IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
IFile file = root.getFile(new Path(fileName));
if (!file.exists()) {
abort("MIDI file does not exist.", null);
}
Sequencer sequencer = null;
MidiFileFormat fileFormat = null;
try {
sequencer = MidiSystem.getSequencer();
sequencer.open();
IPath location = file.getLocation();
if (location != null) {
fileFormat = MidiSystem.getMidiFileFormat(location.toFile());
}
} catch (MidiUnavailableException e) {
abort("Cannot initialize sequencer.", e);
} catch (InvalidMidiDataException e) {
abort("Invalid MIDI file.", e);
} catch (IOException e) {
abort("Error reading MIDI file.", e);
}
BufferedInputStream stream = new BufferedInputStream(file.getContents());
try {
sequencer.setSequence(stream);
} catch (IOException e) {
abort("Error reading MIDI file", e);
} catch (InvalidMidiDataException e) {
abort("Inavlid MIDI file.", e);
}
MidiLaunch midiLaunch = (MidiLaunch)launch;
midiLaunch.setSequencer(sequencer);
midiLaunch.setFormat(fileFormat);
sequencer.start();
}
/**
* Throws an exception with a new status containing the given
* message and optional exception.
*
* @param message error message
* @param e underlying exception
* @throws CoreException
*/
private void abort(String message, Throwable e) throws CoreException {
throw new CoreException(new Status(IStatus.ERROR, DebugCorePlugin.getDefault().getDescriptor().getUniqueIdentifier(), 0, message, e));
}
/* (non-Javadoc)
* @see org.eclipse.debug.core.model.ILaunchConfigurationDelegate2#getLaunch(org.eclipse.debug.core.ILaunchConfiguration, java.lang.String)
*/
public ILaunch getLaunch(ILaunchConfiguration configuration, String mode) throws CoreException {
return new MidiLaunch(configuration, mode);
}
}
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