| /******************************************************************************* |
| * Copyright (c) 2011 Tasktop Technologies. |
| * 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: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.context.core; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IExtension; |
| import org.eclipse.core.runtime.IExtensionPoint; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.mylyn.commons.core.StatusHandler; |
| import org.eclipse.mylyn.context.core.ContextComputationStrategy; |
| import org.eclipse.osgi.util.NLS; |
| |
| /** |
| * Read the strategies extension point |
| * |
| * @author David Green |
| */ |
| public class StrategiesExtensionPointReader { |
| |
| private static final String CONTEXT_COMPUTATION_STRATEGY = "contextComputationStrategy"; //$NON-NLS-1$ |
| |
| private static final String ATTRIBUTE_CLASS = "class"; //$NON-NLS-1$ |
| |
| private static final String STRATEGIES_EXTENSION_POINT_ID = ContextCorePlugin.ID_PLUGIN + ".strategies"; //$NON-NLS-1$ |
| |
| public static List<ContextComputationStrategy> readContextComputationStrategies() { |
| List<ContextComputationStrategy> strategies = new ArrayList<ContextComputationStrategy>(); |
| |
| IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint( |
| STRATEGIES_EXTENSION_POINT_ID); |
| IExtension[] extensions = extensionPoint.getExtensions(); |
| for (IExtension extension : extensions) { |
| IConfigurationElement[] configurationElements = extension.getConfigurationElements(); |
| for (IConfigurationElement element : configurationElements) { |
| if (element.getName().equals(CONTEXT_COMPUTATION_STRATEGY)) { |
| try { |
| ContextComputationStrategy strategy = (ContextComputationStrategy) element.createExecutableExtension(ATTRIBUTE_CLASS); |
| strategies.add(strategy); |
| } catch (Throwable t) { |
| StatusHandler.log(new Status(IStatus.ERROR, ContextCorePlugin.ID_PLUGIN, NLS.bind( |
| "Cannot instantiate {0} from bundle {1}: {2}", //$NON-NLS-1$ |
| new Object[] { element.getAttribute(ATTRIBUTE_CLASS), |
| extension.getContributor().getName(), t.getMessage() }), t)); |
| } |
| } |
| } |
| } |
| return strategies; |
| } |
| } |