cdt/cdt_6_0_x/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/core/executables/ExecutablesManager.java
changeset 45 70f756c14af3
parent 37 c2bce6dd59e7
child 51 49c226a8748e
--- a/cdt/cdt_6_0_x/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/core/executables/ExecutablesManager.java	Thu Jul 30 14:41:10 2009 -0500
+++ b/cdt/cdt_6_0_x/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/core/executables/ExecutablesManager.java	Thu Jul 30 17:06:37 2009 -0500
@@ -11,29 +11,50 @@
 
 package org.eclipse.cdt.debug.core.executables;
 
+import java.text.DateFormat;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
+import org.eclipse.cdt.core.model.CoreModel;
+import org.eclipse.cdt.core.settings.model.CProjectDescriptionEvent;
+import org.eclipse.cdt.core.settings.model.ICProjectDescription;
+import org.eclipse.cdt.core.settings.model.ICProjectDescriptionListener;
 import org.eclipse.cdt.debug.core.CDebugCorePlugin;
-import org.eclipse.cdt.debug.internal.core.executables.ExecutablesChangeEvent;
 import org.eclipse.cdt.debug.internal.core.executables.StandardExecutableImporter;
-import org.eclipse.cdt.debug.internal.core.executables.StandardExecutableProvider;
 import org.eclipse.cdt.debug.internal.core.executables.StandardSourceFileRemapping;
 import org.eclipse.cdt.debug.internal.core.executables.StandardSourceFilesProvider;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.IProjectDescription;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.resources.IResourceChangeEvent;
+import org.eclipse.core.resources.IResourceChangeListener;
+import org.eclipse.core.resources.IResourceDelta;
+import org.eclipse.core.resources.IResourceDeltaVisitor;
+import org.eclipse.core.resources.ResourcesPlugin;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IConfigurationElement;
+import org.eclipse.core.runtime.IExtension;
+import org.eclipse.core.runtime.IExtensionPoint;
+import org.eclipse.core.runtime.IExtensionRegistry;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.MultiStatus;
+import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.PlatformObject;
 import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.SubMonitor;
 import org.eclipse.core.runtime.SubProgressMonitor;
 import org.eclipse.core.runtime.jobs.Job;
-import org.eclipse.debug.core.DebugPlugin;
+import org.eclipse.osgi.service.debug.DebugOptions;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.ServiceReference;
 
 /**
  * The Executables Manager maintains a collection of executables built by all of
@@ -43,28 +64,78 @@
  * @author Ken Ryall
  * 
  */
-public class ExecutablesManager extends PlatformObject {
+public class ExecutablesManager extends PlatformObject implements IResourceChangeListener, ICProjectDescriptionListener {
 
-	private final HashMap<String, Executable> executables = new HashMap<String, Executable>();
-	private final List<IExecutablesChangeListener> changeListeners = Collections.synchronizedList(new ArrayList<IExecutablesChangeListener>());
-	private final List<ISourceFileRemapping> sourceFileRemappings = Collections.synchronizedList(new ArrayList<ISourceFileRemapping>());
-	private final List<IExecutableProvider> executableProviders = Collections.synchronizedList(new ArrayList<IExecutableProvider>());
-	private final List<ISourceFilesProvider> sourceFileProviders = Collections.synchronizedList(new ArrayList<ISourceFilesProvider>());
-	private final List<IExecutableImporter> executableImporters = Collections.synchronizedList(new ArrayList<IExecutableImporter>());
-	private boolean refreshNeeded = true;
-	private boolean tempDisableRefresh = false;
+	private static final String EXECUTABLES_MANAGER_DEBUG_TRACING = CDebugCorePlugin.PLUGIN_ID + "EXECUTABLES_MANAGER_DEBUG_TRACING"; //$NON-NLS-1$
+		
+	private Map<IProject, IProjectExecutablesProvider> executablesProviderMap = new HashMap<IProject, IProjectExecutablesProvider>();
+	private Map<IProject, List<Executable>> executablesMap = new HashMap<IProject, List<Executable>>();
+	private List<IExecutablesChangeListener> changeListeners = Collections.synchronizedList(new ArrayList<IExecutablesChangeListener>());
+	private List<IProjectExecutablesProvider> executableProviders;
+	private List<ISourceFilesProvider> sourceFileProviders;
+	private List<ISourceFileRemapping> sourceFileRemappings;
+	private List<IExecutableImporter> executableImporters;
+	
+	private boolean DEBUG;
 	
 	private final Job refreshJob = new Job("Get Executables") {
 
 		@Override
 		public IStatus run(IProgressMonitor monitor) {
-			refreshExecutables(monitor);
+
+			trace("Get Executables job started at "
+					+ getStringFromTimestamp(System.currentTimeMillis()));
+
+			List<IProject> projects = getProjectsToCheck();
+
+			SubMonitor subMonitor = SubMonitor
+					.convert(monitor, projects.size());
+
+			for (IProject project : projects) {
+				if (subMonitor.isCanceled()) {
+					trace("Get Executables job cancelled at "
+							+ getStringFromTimestamp(System.currentTimeMillis()));
+					return Status.CANCEL_STATUS;
+				}
+
+				subMonitor.subTask("Checking project: " + project.getName());
+
+				// get the executables provider for this project
+				IProjectExecutablesProvider provider = getExecutablesProviderForProject(project);
+				if (provider != null) {
+					trace("Getting executables for project: "
+							+ project.getName() + " using "
+							+ provider.toString());
+
+					// store the list of executables for this project
+					synchronized (executablesMap) {
+						executablesMap.put(project, provider.getExecutables(
+								project, subMonitor.newChild(1,
+										SubMonitor.SUPPRESS_NONE)));
+					}
+				}
+			}
+
+			// notify the listeners
+			synchronized (changeListeners) {
+				for (IExecutablesChangeListener listener : changeListeners) {
+					listener.executablesListChanged();
+				}
+			}
+
+			trace("Get Executables job finished at "
+					+ getStringFromTimestamp(System.currentTimeMillis()));
+
 			return Status.OK_STATUS;
 		}
 	};
 
 	private static ExecutablesManager executablesManager = null;
-
+	
+	/**
+	* Get the executables manager instance
+	* @return the executables manager
+	*/
 	public static ExecutablesManager getExecutablesManager() {
 		if (executablesManager == null)
 			executablesManager = new ExecutablesManager();
@@ -72,126 +143,130 @@
 	}
 
 	public ExecutablesManager() {
-		addSourceFileRemapping(new StandardSourceFileRemapping());
-		addExecutableImporter(new StandardExecutableImporter());
-		addExecutablesProvider(new StandardExecutableProvider());
-		addSourceFilesProvider(new StandardSourceFilesProvider());
+		// check if debugging is enabled
+		BundleContext context = CDebugCorePlugin.getDefault().getBundle()
+				.getBundleContext();
+		if (context != null) {
+			ServiceReference reference = CDebugCorePlugin.getDefault()
+					.getBundle().getBundleContext().getServiceReference(
+							DebugOptions.class.getName());
+			if (reference != null) {
+				DebugOptions service = (DebugOptions) context
+						.getService(reference);
+				if (service != null) {
+					try {
+						DEBUG = service.getBooleanOption(
+								EXECUTABLES_MANAGER_DEBUG_TRACING, false);
+					} finally {
+						// we have what we want - release the service
+						context.ungetService(reference);
+					}
+				}
+			}
+		}
+
+		refreshJob.setPriority(Job.SHORT);
+
+		// load the extension points
+		loadExecutableProviderExtensions();
+		loadSoureFileProviderExtensions();
+		loadSoureRemappingExtensions();
+		loadExecutableImporterExtensions();
+
+		// add the standard providers
+		executableProviders.add(0, new StandardExecutableProvider());
+		sourceFileProviders.add(0, new StandardSourceFilesProvider());
+		sourceFileRemappings.add(0, new StandardSourceFileRemapping());
+		executableImporters.add(0, new StandardExecutableImporter());
+
+		// listen for events we're interested in
+		ResourcesPlugin.getWorkspace().addResourceChangeListener(
+				this,
+				IResourceChangeEvent.POST_CHANGE
+						| IResourceChangeEvent.POST_BUILD);
+		CoreModel.getDefault().getProjectDescriptionManager()
+				.addCProjectDescriptionListener(this,
+						CProjectDescriptionEvent.DATA_APPLIED);
+
+		// schedule a refresh so we get up to date
+		scheduleRefresh();
+
 	}
 
+	/**
+	* Adds an executable listener
+	* @param listener the listener to add
+	*/
 	public void addExecutablesChangeListener(IExecutablesChangeListener listener) {
 		changeListeners.add(listener);
 	}
 
+	/**
+	* Removes an executable listener
+	* @param listener the listener to remove
+	*/
 	public void removeExecutablesChangeListener(IExecutablesChangeListener listener) {
 		changeListeners.remove(listener);
 	}
 
-	public void addSourceFileRemapping(ISourceFileRemapping remapping) {
-		sourceFileRemappings.add(remapping);
-	}
-
-	public void removeSourceFileRemapping(ISourceFileRemapping remapping) {
-		sourceFileRemappings.remove(remapping);
-	}
-
-	public void addExecutableImporter(IExecutableImporter importer) {
-		executableImporters.add(importer);
-	}
-
-	public void removeExecutableImporter(IExecutableImporter importer) {
-		executableImporters.remove(importer);
-	}
-
-	public void addExecutablesProvider(IExecutableProvider provider) {
-		executableProviders.add(provider);
-	}
-
-	/**
-	 * @since 6.0
-	 */
-	public void addSourceFilesProvider(ISourceFilesProvider provider) {
-		sourceFileProviders.add(provider);
-	}
+	
 
 	/**
-	 * @since 6.0
-	 */
-	public void removeSourceFilesProvider(ISourceFilesProvider provider) {
-		sourceFileProviders.remove(provider);
-	}
-
-	public void removeExecutablesProvider(IExecutableProvider provider) {
-		executableProviders.remove(provider);
-	}
-
-	public IStatus refreshExecutables(IProgressMonitor monitor) {
-		if (tempDisableRefresh) {
-			return Status.OK_STATUS;
-		}
-
-		
-		synchronized (executables) {
-			HashMap<String, Executable> oldList = new HashMap<String, Executable>(executables);
-			executables.clear();
-
-			IExecutableProvider[] exeProviders = getExecutableProviders();
-
-			Arrays.sort(exeProviders, new Comparator<IExecutableProvider>() {
+	* Gets the list of executables in the workspace.
+	* @return the list of executables which may be empty
+	*/
+	public Collection<Executable> getExecutables() {	
+		trace("getExecutables called at " + getStringFromTimestamp(System.currentTimeMillis()));
+		List<Executable> executables = new ArrayList<Executable>();
 
-				public int compare(IExecutableProvider arg0, IExecutableProvider arg1) {
-					int p0 = arg0.getPriority();
-					int p1 = arg1.getPriority();
-					if (p0 > p1)
-						return 1;
-					if (p0 < p1)
-						return -1;
-					return 0;
-				}});
+		synchronized (executablesMap) {
+			for (List<Executable> exes : executablesMap.values()) {
+				for (Executable exe : exes) {
+					if (!executables.contains(exe)) {
+						executables.add(exe);
+					}
 
-			refreshNeeded = false;
-			monitor.beginTask("Refresh Executables", exeProviders.length);
-			for (IExecutableProvider provider : exeProviders) {
-				Executable[] exes = provider.getExecutables(new SubProgressMonitor(monitor, 1));
-				for (Executable executable : exes) {
-					executables.put(executable.getPath().toOSString(), executable);
-				}
-			}
-			monitor.done();
-
-			synchronized (changeListeners) {
-				Collection<Executable> newExes = executables.values();
-				Executable[] exeArray = newExes.toArray(new Executable[newExes.size()]);
-				Collection<Executable> oldExes = oldList.values();
-				Executable[] oldArray = oldExes.toArray(new Executable[oldExes.size()]);				
-				for (IExecutablesChangeListener listener : changeListeners) {
-					listener.executablesChanged(new ExecutablesChangeEvent(oldArray, exeArray));
 				}
 			}
 		}
 
-		return monitor.isCanceled() ? Status.CANCEL_STATUS : Status.OK_STATUS;
-	}
+		trace("getExecutables returned at " + getStringFromTimestamp(System.currentTimeMillis()));
+		
+		return executables;
 
-	public Executable[] getExecutables() {
-		if (refreshNeeded) {
-			try {
-				refreshJob.schedule();
-				refreshJob.join();
-			} catch (InterruptedException e) {
-				DebugPlugin.log( e );
-			}
-		}
-		
-		synchronized (executables)
-		{
-			Collection<Executable> exes = executables.values();
-			return exes.toArray(new Executable[exes.size()]);
-		}
 	}
 
 	/**
-	 * @since 6.0
-	 */
+	* Gets the collection of executables for the given project
+	* @param project the project
+	* @return collection of executables which may be empty
+	*/
+	public Collection<Executable> getExecutablesForProject(IProject project) {
+		List<Executable> executables = new ArrayList<Executable>();
+
+		synchronized (executablesMap) {
+			List<Executable> exes = executablesMap.get(project);
+			if (exes != null) {
+				for (Executable exe : exes) {
+					if (!executables.contains(exe)) {
+						executables.add(exe);
+					}
+				}
+			}
+		}
+		return executables;
+	}
+			
+
+	/**
+	* Attempt to remap the path to the given source file in the given executable using
+	* source file mapping extensions
+	* @param executable the executable
+	* @param filePath the absolute path to the source file
+	* @return the new path to the source file, which was remapped if possible
+	*
+	* @since 6.0
+	*/
 	public String remapSourceFile(Executable executable, String filePath) {
 		synchronized (sourceFileRemappings) {
 			for (ISourceFileRemapping remapping : sourceFileRemappings) {
@@ -203,45 +278,64 @@
 		return filePath;
 	}
 
-	public void importExecutables(final String[] fileNames, IProgressMonitor monitor) {
+	/**
+	* Import the given executables into the manager
+	* @param fileNames the absolute paths of the executables to import
+	* @param monitor progress monitor
+	*/
+	public void importExecutables(final String[] fileNames,
+			IProgressMonitor monitor) {
 		boolean handled = false;
-		try {
-			
-			tempDisableRefresh = true;
-			monitor.beginTask("Import Executables", executableImporters.size());
-			synchronized (executableImporters) {
-				Collections.sort(executableImporters, new Comparator<IExecutableImporter>() {
+		monitor.beginTask("Import Executables", executableImporters.size());
+		synchronized (executableImporters) {
+			Collections.sort(executableImporters,
+					new Comparator<IExecutableImporter>() {
+
+						public int compare(IExecutableImporter arg0,
+								IExecutableImporter arg1) {
+							int p0 = arg0.getPriority(fileNames);
+							int p1 = arg1.getPriority(fileNames);
+							if (p0 < p1)
+								return 1;
+							if (p0 > p1)
+								return -1;
+							return 0;
+						}
+					});
 
-					public int compare(IExecutableImporter arg0, IExecutableImporter arg1) {
-						int p0 = arg0.getPriority(fileNames);
-						int p1 = arg1.getPriority(fileNames);
-						if (p0 < p1)
-							return 1;
-						if (p0 > p1)
-							return -1;
-						return 0;
-					}});
+			for (IExecutableImporter importer : executableImporters) {
+				if (handled || monitor.isCanceled()) {
+					break;
+				}
+			}
+		}
 
-				for (IExecutableImporter importer : executableImporters) {
-					handled = importer.importExecutables(fileNames, new SubProgressMonitor(monitor, 1));
-					if (handled || monitor.isCanceled()) {
-						break;
+		scheduleRefresh();
+	}
+							
+	/**
+	 * Determines if the given executable is currently known by the manager
+	 * 
+	 * @param exePath
+	 *            the absolute path to the executable
+	 * @return true if the manager knows about it, false otherwise
+	 */
+	public boolean executableExists(IPath exePath) {
+		synchronized (executablesMap) {
+			for (List<Executable> exes : executablesMap.values()) {
+				for (Executable exe : exes) {
+					if (exe.getPath().equals(exePath)) {
+						return true;
+
 					}
 				}
 			}
 
-		} finally {
-			tempDisableRefresh = false;
 		}
-		
-		if (handled)
-			refreshExecutables(monitor);
-		monitor.done();
+
+		return false;
 	}
 
-	public ISourceFileRemapping[] getSourceFileRemappings() {
-		return sourceFileRemappings.toArray(new ISourceFileRemapping[sourceFileRemappings.size()]);
-	}
 
 	public IExecutableProvider[] getExecutableProviders() {
 		return executableProviders.toArray(new IExecutableProvider[executableProviders.size()]);
@@ -254,31 +348,17 @@
 		return sourceFileProviders.toArray(new ISourceFilesProvider[sourceFileProviders.size()]);
 	}
 
-	public IExecutableImporter[] getExecutableImporters() {
-		return executableImporters.toArray(new IExecutableImporter[executableImporters.size()]);
-	}
-
-	public void scheduleRefresh(IExecutableProvider provider, long delay) {
-		refreshNeeded = true;
-		refreshJob.schedule(delay);
-	}
+	/**
+	* Get the list of source files for the given executable
+	* @param executable the executable
+	* @param monitor progress monitor
+	* @return an array of source files which may be empty
+	*/
+	public String[] getSourceFiles(final Executable executable, IProgressMonitor monitor) {
+			String[] result = new String[0];
+			trace("getSourceFiles called at " + getStringFromTimestamp(System.currentTimeMillis()) + " for " + executable.getPath().toOSString());
 
-	public boolean refreshNeeded() {
-		return refreshNeeded;
-	}
-	
-	public boolean executableExists(IPath exePath) {
-		synchronized (executables) {
-			return executables.containsKey(exePath.toOSString());			
-		}
-	}
 
-	/**
-	 * @since 6.0
-	 */
-	public String[] getSourceFiles(final Executable executable,
-			IProgressMonitor monitor) {
-		String[] result = new String[0];
 		synchronized (sourceFileProviders) {
 			Collections.sort(sourceFileProviders, new Comparator<ISourceFilesProvider>() {
 
@@ -295,67 +375,467 @@
 			monitor.beginTask("Finding source files in " + executable.getName(), sourceFileProviders.size());
 			for (ISourceFilesProvider provider : sourceFileProviders) {
 				String[] sourceFiles = provider.getSourceFiles(executable, new SubProgressMonitor(monitor, 1));
-				if (sourceFiles.length > 0)
-				{
+				if (sourceFiles.length > 0) {
 					result = sourceFiles;
+					trace("getSourceFiles got " + sourceFiles.length + " files from " + provider.toString());
 					break;
 				}
 			}
+			
+			trace("getSourceFiles returned at " + getStringFromTimestamp(System.currentTimeMillis()));
+
 			monitor.done();
 		}
 		return result;
 	}
 
 	/**
-	 * @since 6.0
-	 */
-	public IStatus removeExecutables(Executable[] executables, IProgressMonitor monitor) {
-		IExecutableProvider[] exeProviders = getExecutableProviders();
+	* Removes the given executables
+	* @param executables the array of executables to be removed
+	* @param monitor progress monitor
+	* @return IStatus of the operation
+	* 
+	* @since 6.0
+	*/
+	public IStatus removeExecutables(Executable[] executables,
+			IProgressMonitor monitor) {
+		MultiStatus status = new MultiStatus(CDebugCorePlugin.PLUGIN_ID,
+				IStatus.WARNING,
+				"Couldn't remove all of the selected executables", null);
 
-		IStatus result = Status.OK_STATUS;
-		
-		Arrays.sort(exeProviders, new Comparator<IExecutableProvider>() {
+		monitor.beginTask("Remove Executables", executables.length);
 
-			public int compare(IExecutableProvider arg0, IExecutableProvider arg1) {
-				int p0 = arg0.getPriority();
-				int p1 = arg1.getPriority();
-				if (p0 > p1)
-					return 1;
-				if (p0 < p1)
-					return -1;
-				return 0;
-			}
-		});
-
-		MultiStatus combinedStatus = new MultiStatus(CDebugCorePlugin.PLUGIN_ID, IStatus.WARNING, "Couldn't remove all of the selected executables", null);
-		refreshNeeded = false;
-		monitor.beginTask("Remove Executables", exeProviders.length);
 		for (Executable executable : executables) {
-			boolean handled = false;
-			IStatus rmvStatus = Status.OK_STATUS;;
-			for (IExecutableProvider provider : exeProviders) {
-				if (!handled)
-				{
-					rmvStatus = provider.removeExecutable(executable, new SubProgressMonitor(monitor, 1));
-					handled = rmvStatus.getSeverity() == IStatus.OK;
-				}				
-			}
-			if (!handled)
-			{
-				combinedStatus.add(rmvStatus);
-				result = combinedStatus;
+			IProjectExecutablesProvider provider = getExecutablesProviderForProject(executable
+					.getProject());
+			if (provider != null) {
+				IStatus result = provider.removeExecutable(executable,
+						new SubProgressMonitor(monitor, 1));
+				if (result.isOK()) {
+					// remove the exe from the list
+					List<Executable> exes = executablesMap.get(executable
+							.getProject());
+					if (exes != null) {
+						exes.remove(executable);
+					}
+				} else {
+					status.add(result);
+				}
 			}
 		}
-		monitor.done();
-		
-		return result;
+
+		// notify listeners that the list has changed. only do this if at least
+		// one delete succeeded.
+		if (status.getChildren().length != executables.length) {
+			synchronized (changeListeners) {
+				for (IExecutablesChangeListener listener : changeListeners) {
+					listener.executablesListChanged();
+				}
+			}
+		}
+
+		return status;
 	}
 
 	/**
-	 * @since 6.0
-	 */
-	public void setRefreshNeeded(boolean refresh) {
-		refreshNeeded = true;
+	* Refresh the list of executables for the given projects
+	* @param projects the list of projects, or null.  if null or the list
+	* is empty, all projects will be refreshed.
+	*/
+	public void refresh(List<IProject> projects) {
+		if (projects == null || projects.size() == 0) {
+			// clear the entire cache
+			executablesMap.clear();
+		} else {
+			for (IProject project : projects) {
+				executablesMap.remove(project);
+			}
+		}
+
+		scheduleRefresh();
+
+	}
+
+	public void resourceChanged(IResourceChangeEvent event) {
+
+		synchronized (executablesMap) {
+			// project needs to be refreshed after a build/clean as the binary
+			// may
+			// be added/removed/renamed etc.
+			if (event.getType() == IResourceChangeEvent.POST_BUILD) {
+				Object obj = event.getSource();
+				if (obj != null && obj instanceof IProject) {
+					if (executablesMap.containsKey(obj)) {
+						List<Executable> executables = executablesMap
+								.remove(obj);
+
+						trace("Scheduling refresh because project "
+								+ ((IProject) obj).getName()
+								+ " built or cleaned");
+
+						scheduleRefresh();
+
+						// notify the listeners that these executables have
+						// possibly changed
+						if (executables != null && executables.size() > 0) {
+							synchronized (changeListeners) {
+								for (IExecutablesChangeListener listener : changeListeners) {
+									listener.executablesChanged(executables);
+								}
+							}
+						}
+					}
+				}
+				return;
+			}
+
+			// refresh when projects are opened or closed. note that deleted
+			// projects are handled later in this method. new projects are
+			// handled
+			// in handleEvent. resource changed events always start at the
+			// workspace
+			// root, so projects are the next level down
+			boolean refreshNeeded = false;
+			IResourceDelta[] projects = event.getDelta().getAffectedChildren();
+			for (IResourceDelta projectDelta : projects) {
+				if ((projectDelta.getFlags() & IResourceDelta.OPEN) != 0) {
+					if (projectDelta.getKind() == IResourceDelta.CHANGED) {
+						// project was opened or closed
+						if (executablesMap.containsKey(projectDelta
+								.getResource())) {
+							executablesMap.remove(projectDelta.getResource());
+						}
+						refreshNeeded = true;
+					}
+				}
+			}
+
+			if (refreshNeeded) {
+				trace("Scheduling refresh because project(s) opened or closed");
+
+				scheduleRefresh();
+				return;
+			}
+
+			try {
+				event.getDelta().accept(new IResourceDeltaVisitor() {
+
+					public boolean visit(IResourceDelta delta)
+							throws CoreException {
+						if (delta.getKind() == IResourceDelta.ADDED
+								|| delta.getKind() == IResourceDelta.REMOVED) {
+							IResource deltaResource = delta.getResource();
+							if (deltaResource != null) {
+								boolean refresh = false;
+								if (delta.getKind() == IResourceDelta.REMOVED
+										&& deltaResource instanceof IProject) {
+									// project deleted
+									if (executablesMap
+											.containsKey(deltaResource)) {
+										executablesMap.remove(deltaResource);
+										refresh = true;
+
+										trace("Scheduling refresh because project "
+												+ deltaResource.getName()
+												+ " deleted");
+									}
+								} else {
+									// see if a binary has been added/removed
+									IPath resourcePath = deltaResource
+											.getLocation();
+									if (resourcePath != null
+											&& Executable
+													.isExecutableFile(resourcePath)) {
+										if (executablesMap
+												.containsKey(deltaResource
+														.getProject())) {
+											executablesMap.remove(deltaResource
+													.getProject());
+											refresh = true;
+
+											trace("Scheduling refresh because a binary was added/removed");
+										}
+									}
+								}
+
+								if (refresh) {
+									scheduleRefresh();
+									return false;
+								}
+							}
+						}
+						return true;
+					}
+				});
+			} catch (CoreException e) {
+			}
+		}
+	}
+
+	public void handleEvent(CProjectDescriptionEvent event) {
+		// this handles the cases where the active build configuration changes,
+		// and when new projects are created or loaded at startup.
+		boolean refresh = false;
+
+		int eventType = event.getEventType();
+
+		if (eventType == CProjectDescriptionEvent.DATA_APPLIED) {
+
+			synchronized (executablesMap) {
+				// see if the active build config has changed
+				ICProjectDescription newDesc = event
+						.getNewCProjectDescription();
+				ICProjectDescription oldDesc = event
+						.getOldCProjectDescription();
+				if (oldDesc != null && newDesc != null) {
+					String newConfigName = newDesc.getActiveConfiguration()
+							.getName();
+					String oldConfigName = oldDesc.getActiveConfiguration()
+							.getName();
+					if (!newConfigName.equals(oldConfigName)) {
+						if (executablesMap.containsKey(newDesc.getProject())) {
+							executablesMap.remove(newDesc.getProject());
+							refresh = true;
+
+							trace("Scheduling refresh because active build configuration changed");
+						}
+					}
+				} else if (newDesc != null && oldDesc == null) {
+					// project just created
+					refresh = true;
+
+					trace("Scheduling refresh because project "
+							+ newDesc.getProject().getName() + " created");
+				}
+			}
+		}
+
+		if (refresh) {
+			scheduleRefresh();
+		}
+	}
+
+	private List<IProject> getProjectsToCheck() {
+
+		List<IProject> projects = new ArrayList<IProject>();
+
+		synchronized (executablesMap) {
+			// look for any CDT projects not in our cache
+			for (IProject project : ResourcesPlugin.getWorkspace().getRoot()
+					.getProjects()) {
+				if (!executablesMap.containsKey(project)) {
+					if (CoreModel.hasCNature(project)) {
+						projects.add(project);
+					}
+				}
+			}
+		}
+
+		return projects;
 	}
 
-}
\ No newline at end of file
+	private void scheduleRefresh() {
+		trace("scheduleRefresh called at "
+				+ getStringFromTimestamp(System.currentTimeMillis()));
+
+		refreshJob.cancel();
+		refreshJob.schedule();
+	}
+
+	private IProjectExecutablesProvider getExecutablesProviderForProject(
+			IProject project) {
+		IProjectExecutablesProvider provider = executablesProviderMap
+				.get(project);
+		if (provider == null) {
+			// not cached yet. get the list of project natures from the
+			// providers and
+			// pick the one with the closest match
+			try {
+				IProjectDescription description = project.getDescription();
+				int mostNaturesMatched = 0;
+				for (IProjectExecutablesProvider exeProvider : executableProviders) {
+					List<String> natures = exeProvider.getProjectNatures();
+
+					int naturesMatched = 0;
+					for (String nature : description.getNatureIds()) {
+						if (natures.contains(nature)) {
+							naturesMatched++;
+						}
+					}
+
+					if (naturesMatched > mostNaturesMatched) {
+						provider = exeProvider;
+						mostNaturesMatched = naturesMatched;
+					}
+				}
+
+				// cache it
+				executablesProviderMap.put(project, provider);
+
+			} catch (CoreException e) {
+				e.printStackTrace();
+			}
+		}
+
+		return provider;
+	}
+
+	private void loadExecutableProviderExtensions() {
+		executableProviders = Collections
+				.synchronizedList(new ArrayList<IProjectExecutablesProvider>());
+
+		IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
+		IExtensionPoint extensionPoint = extensionRegistry
+				.getExtensionPoint(CDebugCorePlugin.PLUGIN_ID
+						+ ".ExecutablesProvider"); //$NON-NLS-1$
+		IExtension[] extensions = extensionPoint.getExtensions();
+
+		for (int i = 0; i < extensions.length; i++) {
+			IExtension extension = extensions[i];
+			IConfigurationElement[] elements = extension
+					.getConfigurationElements();
+			IConfigurationElement element = elements[0];
+
+			boolean failed = false;
+			try {
+				Object extObject = element.createExecutableExtension("class"); //$NON-NLS-1$
+				if (extObject instanceof IProjectExecutablesProvider) {
+					executableProviders
+							.add((IProjectExecutablesProvider) extObject);
+				} else {
+					failed = true;
+				}
+			} catch (CoreException e) {
+				failed = true;
+			}
+
+			if (failed) {
+				CDebugCorePlugin
+						.log("Unable to load ExecutablesProvider extension from "
+								+ extension.getContributor().getName());
+			}
+		}
+	}
+
+	private void loadSoureFileProviderExtensions() {
+		sourceFileProviders = Collections
+				.synchronizedList(new ArrayList<ISourceFilesProvider>());
+
+		IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
+		IExtensionPoint extensionPoint = extensionRegistry
+				.getExtensionPoint(CDebugCorePlugin.PLUGIN_ID
+						+ ".SourceFilesProvider"); //$NON-NLS-1$
+		IExtension[] extensions = extensionPoint.getExtensions();
+
+		for (int i = 0; i < extensions.length; i++) {
+			IExtension extension = extensions[i];
+			IConfigurationElement[] elements = extension
+					.getConfigurationElements();
+			IConfigurationElement element = elements[0];
+
+			boolean failed = false;
+			try {
+				Object extObject = element.createExecutableExtension("class"); //$NON-NLS-1$
+				if (extObject instanceof ISourceFilesProvider) {
+					sourceFileProviders.add((ISourceFilesProvider) extObject);
+				} else {
+					failed = true;
+				}
+			} catch (CoreException e) {
+				failed = true;
+			}
+
+			if (failed) {
+				CDebugCorePlugin
+						.log("Unable to load SourceFilesProvider extension from "
+								+ extension.getContributor().getName());
+			}
+		}
+	}
+
+	private void loadSoureRemappingExtensions() {
+		sourceFileRemappings = Collections
+				.synchronizedList(new ArrayList<ISourceFileRemapping>());
+
+		IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
+		IExtensionPoint extensionPoint = extensionRegistry
+				.getExtensionPoint(CDebugCorePlugin.PLUGIN_ID
+						+ ".SourceRemappingProvider"); //$NON-NLS-1$
+		IExtension[] extensions = extensionPoint.getExtensions();
+
+		for (int i = 0; i < extensions.length; i++) {
+			IExtension extension = extensions[i];
+			IConfigurationElement[] elements = extension
+					.getConfigurationElements();
+			IConfigurationElement element = elements[0];
+
+			boolean failed = false;
+			try {
+				Object extObject = element.createExecutableExtension("class"); //$NON-NLS-1$
+				if (extObject instanceof ISourceFileRemapping) {
+					sourceFileRemappings.add((ISourceFileRemapping) extObject);
+				} else {
+					failed = true;
+				}
+			} catch (CoreException e) {
+				failed = true;
+			}
+
+			if (failed) {
+				CDebugCorePlugin
+						.log("Unable to load SourceRemappingProvider extension from "
+								+ extension.getContributor().getName());
+			}
+		}
+	}
+
+	private void loadExecutableImporterExtensions() {
+		executableImporters = Collections
+				.synchronizedList(new ArrayList<IExecutableImporter>());
+
+		IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
+		IExtensionPoint extensionPoint = extensionRegistry
+				.getExtensionPoint(CDebugCorePlugin.PLUGIN_ID
+						+ ".ExecutablesImporter"); //$NON-NLS-1$
+		IExtension[] extensions = extensionPoint.getExtensions();
+
+		for (int i = 0; i < extensions.length; i++) {
+			IExtension extension = extensions[i];
+			IConfigurationElement[] elements = extension
+					.getConfigurationElements();
+			IConfigurationElement element = elements[0];
+
+			boolean failed = false;
+			try {
+				Object extObject = element.createExecutableExtension("class"); //$NON-NLS-1$
+				if (extObject instanceof IExecutableImporter) {
+					executableImporters.add((IExecutableImporter) extObject);
+				} else {
+					failed = true;
+				}
+			} catch (CoreException e) {
+				failed = true;
+			}
+
+			if (failed) {
+				CDebugCorePlugin
+						.log("Unable to load ExecutablesImporter extension from "
+								+ extension.getContributor().getName());
+			}
+		}
+	}
+
+	private void trace(String msg) {
+		if (DEBUG) {
+			// TODO use Logger?
+			System.out.println(msg);
+		}
+	}
+
+	private String getStringFromTimestamp(long timestamp) {
+		return DateFormat.getTimeInstance(DateFormat.MEDIUM).format(
+				new Date(timestamp));
+	}
+}
+
+	
\ No newline at end of file