/** * Copyright (C) 2014 BonitaSoft S.A. * BonitaSoft, 32 rue Gustave Eiffel - 38000 Grenoble * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2.0 of the License, or * (at your option) any later version. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.bonitasoft.studio.common.extension; import static com.google.common.base.Preconditions.checkNotNull; import org.eclipse.core.runtime.IConfigurationElement; import org.eclipse.core.runtime.Platform; import org.eclipse.e4.core.contexts.ContextInjectionFactory; import org.eclipse.e4.core.contexts.EclipseContextFactory; import org.eclipse.e4.core.contexts.IEclipseContext; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.internal.Workbench; import org.osgi.framework.Bundle; /** * @author Romain Bioteau */ public class ExtensionContextInjectionFactory { private static IEclipseContext HEADLESS_CONTEXT; public <T> T make(final IConfigurationElement element, final String classNameAttribute, final Class<T> extension) throws ClassNotFoundException { return make(element, classNameAttribute, extension, workbenchContext()); } private Bundle getDeclaringBundle(final IConfigurationElement element) { return Platform.getBundle(element.getDeclaringExtension().getNamespaceIdentifier()); } public static IEclipseContext workbenchContext() { if (PlatformUI.isWorkbenchRunning()) { final Workbench workbench = (Workbench) PlatformUI.getWorkbench(); if (workbench != null) { final IEclipseContext context = workbench.getContext(); checkNotNull(context, "Workbench eclipse context is null"); return context; } throw new IllegalStateException("No workbench available"); } return headlessContext(); } private static synchronized IEclipseContext headlessContext() { if (HEADLESS_CONTEXT == null) { HEADLESS_CONTEXT = EclipseContextFactory.create("headlessContext"); } return HEADLESS_CONTEXT; } @SuppressWarnings("unchecked") public <T> T make(final IConfigurationElement element, final String classNameAttribute, final Class<T> extension, final IEclipseContext context) throws ClassNotFoundException { final String className = element.getAttribute(classNameAttribute); final Class<T> loadClass = (Class<T>) getDeclaringBundle(element).loadClass(className); return ContextInjectionFactory.make(loadClass, context); } }