| /******************************************************************************* |
| * Copyright (c) 2000, 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.ui.progress; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.jobs.ISchedulingRule; |
| import org.eclipse.ui.model.IWorkbenchAdapter; |
| |
| /** |
| * This adapter interface provides support for lazy initialization of UI workbench elements |
| * that are displayed visually. This adapter is used with an associated deferred content provider. |
| * |
| * @see DeferredTreeContentManager |
| * @since 3.0 |
| */ |
| public interface IDeferredWorkbenchAdapter extends IWorkbenchAdapter { |
| |
| /** |
| * Called by a job run in a separate thread to fetch the children of this adapter. |
| * The adapter should in return notify of new children via the collector. |
| * This is generally used when a content provider is getting elements. |
| * <p> |
| * It is good practice to check the passed in monitor for cancellation. This will |
| * provide good responsiveness for cancellation requests made by the user. |
| * </p> |
| * |
| * @param object the object to fetch the children for |
| * @param collector the collector to notify about new children. Should not |
| * be <code>null</code>. |
| * @param monitor a progress monitor that will never be <code>null<code> to |
| * support reporting and cancellation. |
| */ |
| public void fetchDeferredChildren(Object object, |
| IElementCollector collector, IProgressMonitor monitor); |
| |
| /** |
| * Returns whether this adapter may have children. This is an optimized method |
| * used by content providers to allow showing the [+] expand icon without having |
| * yet fetched the children for the element. |
| * <p> |
| * If <code>false</code> is returned, then the content provider may assume |
| * that this adapter has no children. If <code>true</code> is returned, |
| * then the job manager may assume that this adapter may have children. |
| * <p> |
| * |
| * @return <code>true</code>if the adapter may have childen, and <code>false</code> |
| * otherwise. |
| */ |
| public boolean isContainer(); |
| |
| /** |
| * Returns the rule used to schedule the deferred fetching of children for this adapter. |
| * |
| * @param object the object whose children are being fetched |
| * @return the scheduling rule. May be <code>null</code>. |
| * @see org.eclipse.core.runtime.jobs.Job#setRule(ISchedulingRule) |
| */ |
| public ISchedulingRule getRule(Object object); |
| } |