initial release of additional MIDI example

1 files changed, 117 insertions, 0 deletions

diff --git a/org.eclipse.debug.examples.core/src/org/eclipse/debug/examples/core/midi/launcher/MidiLaunchDelegate.java b/org.eclipse.debug.examples.core/src/org/eclipse/debug/examples/core/midi/launcher/MidiLaunchDelegate.java
new file mode 100644
index 000000000..221fef395
--- /dev/null
+++ b/org.eclipse.debug.examples.core/src/org/eclipse/debug/examples/core/midi/launcher/MidiLaunchDelegate.java
@@ -0,0 +1,117 @@
+/*******************************************************************************
+ * 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);
+	}
+
+}