/**
* This will refresh the workspace contributions if needed, then search through the workspace
* loaded bundles for a class corresponding to <code>qualifiedName</code>.
*
* @param qualifiedName The qualified name of the class we seek to load.
* @param honorOSGiVisibility If <code>true</code>, this will only search through exported
* packages for the class <code>qualifiedName</code>. Otherwise we'll search through all
* bundles by simply trying to load the class and catching the {@link ClassNotFoundException}
* if it isn't loadable.
* @return The class <code>qualifiedName</code> if it could be found in the workspace bundles,
* <code>null</code> otherwise.
*/
public synchronized Class<?> getClass(String qualifiedName, boolean honorOSGiVisibility) {
if (changedContributions.size() > 0) {
refreshContributions();
}
// Has an instance of this class already been loaded?
Class<?> clazz = null;
final WorkspaceClassInstance workspaceInstance = workspaceLoadedClasses.get(qualifiedName);
if (workspaceInstance != null) {
if (workspaceInstance.isStale()) {
for (Map.Entry<IPluginModelBase, Bundle> entry : workspaceInstalledBundles.entrySet()) {
final IPluginModelBase model = entry.getKey();
if (workspaceInstance
.getBundle()
.equals(model.getBundleDescription().getSymbolicName())) {
clazz = internalLoadClass(entry.getValue(), qualifiedName);
workspaceInstance.setStale(false);
workspaceInstance.setClass(clazz);
break;
}
}
} else {
clazz = workspaceInstance.getInstance().getClass();
}
}
if (clazz != null) {
return clazz;
}
// The class hasn't been instantiated yet ; search for the class without instantiating it
Iterator<Map.Entry<IPluginModelBase, Bundle>> iterator =
workspaceInstalledBundles.entrySet().iterator();
while (clazz == null && iterator.hasNext()) {
Map.Entry<IPluginModelBase, Bundle> entry = iterator.next();
/*
* If we're asked to honor OSGi package visibility, we'll first check the "Export-Package" header
* of this bundle's MANIFEST.
*/
if (!honorOSGiVisibility || hasCorrespondingExportPackage(entry.getKey(), qualifiedName)) {
try {
clazz = entry.getValue().loadClass(qualifiedName);
} catch (ClassNotFoundException e) {
// Swallow this ; we'll log the issue later on if we cannot find the class at all
}
}
}
if (clazz == null) {
AcceleoCommonPlugin.log(
AcceleoCommonMessages.getString(
"BundleClassLookupFailure", //$NON-NLS-1$
qualifiedName),
false);
}
return clazz;
}
/**
* This will install or refresh the given workspace contribution if needed, then search through it
* for a class corresponding to <code>qualifiedName</code>.
*
* @param project The project that is to be dynamically installed when Acceleo searches for
* workspace contributions.
* @param qualifiedName The qualified name of the class we seek to load.
* @return An instance of the class <code>qualifiedName</code> if it could be found in the
* workspace bundles, <code>null</code> otherwise.
*/
public synchronized Class<?> getClass(IProject project, String qualifiedName) {
Class<?> instance = null;
addWorkspaceContribution(project);
refreshContributions();
final IPluginModelBase model = PluginRegistry.findModel(project);
final Bundle installedBundle = workspaceInstalledBundles.get(model);
if (installedBundle != null) {
instance = internalLoadClass(installedBundle, qualifiedName);
}
return instance;
}
/**
* This will try and load a ResourceBundle for the given qualified name.
*
* @param qualifiedName Name if the resource bundle we need to load.
* @return The loaded resource bundle.
*/
public synchronized ResourceBundle getResourceBundle(String qualifiedName) {
MissingResourceException originalException = null;
// shortcut evaluation in case this properties file can be found in the current classloader.
try {
ResourceBundle bundle = ResourceBundle.getBundle(qualifiedName);
return bundle;
} catch (MissingResourceException e) {
originalException = e;
}
if (changedContributions.size() > 0) {
refreshContributions();
}
/*
* We'll iterate over the bundles that have been installed from the workspace, search for one that
* exports a package of the name we're looking for, then try and load the properties file from this
* bundle's class loader (bundle.getResource()). If the resource couldn't be found in that bundle, we
* loop over to the next.
*/
for (Map.Entry<IPluginModelBase, Bundle> entry : workspaceInstalledBundles.entrySet()) {
final Bundle bundle = entry.getValue();
URL propertiesResource =
bundle.getResource(qualifiedName.replace('.', '/') + ".properties"); // $NON-NLS-1$
if (propertiesResource != null) {
InputStream stream = null;
try {
stream = propertiesResource.openStream();
// make sure this stream is buffered
stream = new BufferedInputStream(stream);
return new PropertyResourceBundle(stream);
} catch (IOException e) {
// Swallow this, we'll throw the original MissingResourceException
} finally {
try {
if (stream != null) {
stream.close();
}
} catch (IOException e) {
// Swallow this, we'll throw the original MissingResourceException
}
}
}
}
throw originalException;
}
