| /******************************************************************************* |
| * Copyright (c) 2004, 2006 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.wst.sse.core; |
| |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.wst.sse.core.internal.SSECorePlugin; |
| import org.eclipse.wst.sse.core.internal.model.ModelManagerImpl; |
| import org.eclipse.wst.sse.core.internal.provisional.IModelManager; |
| import org.osgi.framework.Bundle; |
| |
| /** |
| * Class to allow access to ModelManager. Not intended to be subclassed. |
| * |
| * @since 1.5 org.eclipse.wst.sse.core |
| */ |
| final public class StructuredModelManager { |
| /** |
| * Do not allow instances to be created. |
| */ |
| private StructuredModelManager() { |
| super(); |
| } |
| |
| /** |
| * Provides access to the instance of IModelManager. Returns null if model |
| * manager can not be created or is not valid (such as, when workbench is |
| * shutting down). |
| * |
| * @return IModelManager - returns the one model manager for structured |
| * model |
| */ |
| public static IModelManager getModelManager() { |
| boolean isReady = false; |
| IModelManager modelManager = null; |
| while (!isReady) { |
| Bundle localBundle = Platform.getBundle(SSECorePlugin.ID); |
| int state = localBundle.getState(); |
| if (state == Bundle.ACTIVE) { |
| isReady = true; |
| // getInstance is a synchronized static method. |
| modelManager = ModelManagerImpl.getInstance(); |
| } |
| else if (state == Bundle.STARTING) { |
| try { |
| Thread.sleep(100); |
| } |
| catch (InterruptedException e) { |
| // ignore, just loop again |
| } |
| } |
| else if (state == Bundle.STOPPING || state == Bundle.UNINSTALLED) { |
| isReady = true; |
| modelManager = null; |
| } |
| else { |
| // not sure about other states, 'resolved', 'installed' |
| isReady = true; |
| modelManager = null; |
| } |
| } |
| return modelManager; |
| } |
| } |