| /******************************************************************************* |
| * Copyright (c) 2003, 2014 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.core.internal.runtime; |
| |
| import java.lang.reflect.Method; |
| import org.eclipse.core.runtime.*; |
| import org.osgi.framework.Bundle; |
| |
| /** |
| * This class isolates calls to the backward compatibility layer. |
| * It uses reflection so it can be loaded with success even in the absence of |
| * the compatibility plugin. |
| * |
| * @deprecated Marked as deprecated to suppress deprecation warnings. |
| */ |
| @Deprecated |
| public class CompatibilityHelper { |
| private static final String OPTION_DEBUG_COMPATIBILITY = Platform.PI_RUNTIME + "/compatibility/debug"; //$NON-NLS-1$ |
| public static final boolean DEBUG = Boolean.TRUE.toString().equalsIgnoreCase(InternalPlatform.getDefault().getOption(OPTION_DEBUG_COMPATIBILITY)); |
| public static final String PI_RUNTIME_COMPATIBILITY = "org.eclipse.core.runtime.compatibility"; //$NON-NLS-1$ |
| private static Bundle compatibility = null; |
| |
| public synchronized static void nullCompatibility() { |
| compatibility = null; |
| } |
| |
| public synchronized static Bundle initializeCompatibility() { |
| // if compatibility is stale (has been uninstalled or unresolved) |
| // then we try to get a new resolved compatibility bundle |
| if (compatibility == null || (compatibility.getState() & (Bundle.INSTALLED | Bundle.UNINSTALLED | Bundle.STOPPING)) != 0) |
| compatibility = org.eclipse.core.internal.runtime.InternalPlatform.getDefault().getBundle(PI_RUNTIME_COMPATIBILITY); |
| return compatibility; |
| } |
| |
| public static void setPlugin(IPluginDescriptor descriptor, Plugin plugin) { |
| //Here we use reflection so the runtime code can run without the compatibility plugin |
| if (initializeCompatibility() == null) |
| throw new IllegalStateException(); |
| |
| try { |
| Method setPlugin = descriptor.getClass().getMethod("setPlugin", new Class[] {Plugin.class}); //$NON-NLS-1$ |
| setPlugin.invoke(descriptor, new Object[] {plugin}); |
| } catch (Exception e) { |
| //Ignore the exceptions |
| } |
| } |
| |
| public synchronized static IPluginDescriptor getPluginDescriptor(String pluginId) { |
| //Here we use reflection so the runtime code can run without the compatibility |
| initializeCompatibility(); |
| if (compatibility == null) |
| throw new IllegalStateException(); |
| |
| Class<?> oldInternalPlatform = null; |
| try { |
| oldInternalPlatform = compatibility.loadClass("org.eclipse.core.internal.plugins.InternalPlatform"); //$NON-NLS-1$ |
| Method getPluginDescriptor = oldInternalPlatform.getMethod("getPluginDescriptor", new Class[] {String.class}); //$NON-NLS-1$ |
| return (IPluginDescriptor) getPluginDescriptor.invoke(oldInternalPlatform, new Object[] {pluginId}); |
| } catch (Exception e) { |
| if (DEBUG) { |
| String msg = "Error running compatibility code"; //$NON-NLS-1$ |
| IStatus error = new Status(IStatus.ERROR, Platform.PI_RUNTIME, 1, msg, e); |
| InternalPlatform.getDefault().log(error); |
| } |
| //Ignore the exceptions, return null |
| } |
| return null; |
| } |
| |
| public synchronized static void setActive(IPluginDescriptor descriptor) { |
| initializeCompatibility(); |
| if (compatibility == null) |
| throw new IllegalStateException(); |
| |
| try { |
| Method setPlugin = descriptor.getClass().getMethod("setActive"); //$NON-NLS-1$ |
| setPlugin.invoke(descriptor); |
| } catch (Exception e) { |
| //Ignore the exceptions |
| } |
| } |
| |
| public synchronized static boolean hasPluginObject(IPluginDescriptor descriptor) { |
| initializeCompatibility(); |
| if (compatibility == null) |
| throw new IllegalStateException(); |
| |
| Boolean result = Boolean.FALSE; |
| try { |
| Method setPlugin = descriptor.getClass().getMethod("hasPluginObject"); //$NON-NLS-1$ |
| result = (Boolean) setPlugin.invoke(descriptor); |
| } catch (Exception e) { |
| //Ignore the exceptions |
| } |
| return result.booleanValue(); |
| } |
| } |