/*******************************************************************************
* Copyright (c) 2008, 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
* Lars Vogel <Lars.Vogel@gmail.com> - Bug 440810
******************************************************************************/
package org.eclipse.ui.internal.contexts;
import org.eclipse.core.expressions.Expression;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPartSite;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.contexts.IContextService;
import org.eclipse.ui.internal.expressions.ActivePartExpression;
import org.eclipse.ui.internal.expressions.WorkbenchWindowExpression;
import org.eclipse.ui.internal.services.IWorkbenchLocationService;
import org.eclipse.ui.services.AbstractServiceFactory;
import org.eclipse.ui.services.IServiceLocator;
/**
* @since 3.4
*
*/
public class ContextServiceFactory extends AbstractServiceFactory {
@Override
public Object create(Class serviceInterface, IServiceLocator parentLocator,
IServiceLocator locator) {
if (!IContextService.class.equals(serviceInterface)) {
return null;
}
IWorkbenchLocationService wls = locator
.getService(IWorkbenchLocationService.class);
final IWorkbench wb = wls.getWorkbench();
if (wb == null) {
return null;
}
Object parent = parentLocator.getService(serviceInterface);
if (parent == null) {
// we are registering the global services in the Workbench
return null;
}
final IWorkbenchWindow window = wls.getWorkbenchWindow();
final IWorkbenchPartSite site = wls.getPartSite();
if (site == null) {
Expression exp = new WorkbenchWindowExpression(window);
return new SlaveContextService((IContextService) parent, exp);
}
if (parent instanceof SlaveContextService) {
Expression exp = ((SlaveContextService) parent).fDefaultExpression;
if (exp instanceof ActivePartExpression) {
return new NestableContextService((IContextService) parent, exp);
}
}
Expression exp = new ActivePartExpression(site.getPart());
return new SlaveContextService((IContextService) parent, exp);
}
}