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/*******************************************************************************
* Copyright (c) 2005, 2015 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.preferences.legacy;
import java.lang.reflect.Field;
import org.eclipse.core.internal.preferences.exchange.ILegacyPreferences;
import org.eclipse.core.internal.runtime.InternalPlatform;
import org.eclipse.core.internal.runtime.Messages;
import org.eclipse.core.runtime.*;
import org.eclipse.osgi.util.NLS;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
/**
* Provides initialization of the legacy preferences as described in
* the Plugin class.
*/
public class InitLegacyPreferences implements ILegacyPreferences {
/**
* The method tries to initialize the preferences using the legacy Plugin method.
*
* @param object - plugin to initialize
* @param name - ID of the plugin to be initialized
*
* @see Plugin#initializeDefaultPluginPreferences
*
* @since org.eclipse.core.runtime 3.2
*
* @deprecated Marked deprecated to suppress warnings. This class is added to support
* backward compatibility only and should not be used in any new code.
*/
@Override
@Deprecated
public Object init(Object object, String name) {
Plugin plugin = null;
if (object instanceof Plugin)
plugin = (Plugin) object;
else {
plugin = getActivator(name);
if (plugin == null) {
if (InternalPlatform.DEBUG_PLUGIN_PREFERENCES)
InternalPlatform.message("No plug-in object available to set plug-in default preference overrides for:" + name); //$NON-NLS-1$
return null;
}
}
if (InternalPlatform.DEBUG_PLUGIN_PREFERENCES)
InternalPlatform.message("Applying plug-in default preference overrides for plug-in: " + plugin.getBundle().getBundleId()); //$NON-NLS-1$
plugin.internalInitializeDefaultPluginPreferences();
return plugin;
}
private Plugin getActivator(String name) {
Bundle bundle = InternalPlatform.getDefault().getBundle(name);
if (bundle == null)
return null;
BundleContext context = bundle.getBundleContext();
if (context == null)
return null;
/*
* Reflection is required since there is no OSGi API to retrieve the
* activator. Originally Platform.getPlugin(String) was used, but that
* is no longer available after removing the runtine.compatiblity layer.
*/
try {
Field field = context.getClass().getDeclaredField("activator"); //$NON-NLS-1$
field.setAccessible(true);
Object activator = field.get(context);
if (activator instanceof Plugin)
return (Plugin) activator;
} catch (SecurityException | NoSuchFieldException | IllegalArgumentException | IllegalAccessException ex) {
log(ex, name);
}
return null;
}
private static void log(Exception ex, String name) {
IStatus status = new Status(IStatus.ERROR, Platform.PI_RUNTIME, IStatus.ERROR, NLS.bind(Messages.plugin_unableToGetActivator, name), ex);
InternalPlatform.getDefault().log(status);
}
}
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