| /******************************************************************************* |
| * Copyright (c) 2009, 2013 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.e4.demo.e4photo; |
| |
| import org.eclipse.e4.core.contexts.ContextFunction; |
| import org.eclipse.e4.core.contexts.IEclipseContext; |
| |
| /** |
| * This is an example of a context function that is contributed declaratively using |
| * OSGi declarative services. There are no code references to this class, but if a client |
| * attempts to retrieve a "realm" value from a context, they will get the value returned |
| * by this function, unless a more specific context has registered a different realm. Declarative |
| * services allows the function to be instantiated lazily only when a client first requests it. |
| * A more elaborate function could use values defined the provided context to select |
| * or customize the concrete service object returned from the function. |
| */ |
| public class RealmFunction extends ContextFunction { |
| |
| public Object compute(IEclipseContext context, String contextKey) { |
| return new LockRealm(); |
| } |
| |
| } |
