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package rba.tool.editor.util;
import java.util.ArrayList;
import java.util.List;
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.Platform;
import com.google.inject.Module;
public class ExtensionModuleManager {
public static final ExtensionModuleManager INSTANCE = new ExtensionModuleManager();
private static final String EXTENSION_POINT = "rba.tool.editor.rbaToolEditorExtensionModule"; //$NON-NLS-1$
private static final String EXTENSION_POINT_ELEMENT = "extensionModule"; //$NON-NLS-1$
private static final String EXTENSION_POINT_ELEMENT_ATTRIBUTE = "class"; //$NON-NLS-1$
private List<Module> constraintProviders;
private ExtensionModuleManager() {
}
public List<Module> getExtensionModules() {
if (constraintProviders == null) {
constraintProviders = new ArrayList<Module>();
init();
}
return constraintProviders;
}
private void init() {
IExtensionRegistry registry = Platform.getExtensionRegistry();
IExtensionPoint extensionPoint = registry.getExtensionPoint(EXTENSION_POINT); // $NON-NLS-1$
IExtension[] extensions = extensionPoint.getExtensions();
List<Module> providerList = new ArrayList<Module>();
for (int i = 0; i < extensions.length; i++) {
IConfigurationElement[] elements = extensions[i].getConfigurationElements();
for (int j = 0; j < elements.length; j++) {
IConfigurationElement element = elements[j];
String elementName = element.getName();
if (elementName.equalsIgnoreCase(EXTENSION_POINT_ELEMENT)) { // $NON-NLS-1$
try {
Object provider = element.createExecutableExtension(EXTENSION_POINT_ELEMENT_ATTRIBUTE); // $NON-NLS-1$
if (provider instanceof Module) {
Module factory = (Module) provider;
providerList.add(factory);
}
} catch (CoreException e) {
// do nothing
}
}
}
}
constraintProviders.addAll(providerList);
}
}
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