| /******************************************************************************* |
| * Copyright (c) 2005, 2013 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.debug.internal.ui.viewers; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.eclipse.debug.internal.ui.viewers.provisional.IChildrenRequestMonitor; |
| |
| /** |
| * Implementation for <code>IChildrenRequestMonitor</code>. Collects |
| * children from an asynchronous tree content adapter. |
| * <p> |
| * Not intended to be subclassed or instantiated by clients. For use |
| * speficially with <code>AsynchronousTreeViewer</code>. |
| * </p> |
| * @since 3.2 |
| */ |
| class ChildrenRequestMonitor extends AsynchronousRequestMonitor implements IChildrenRequestMonitor { |
| |
| private boolean fFirstUpdate = true; |
| |
| /** |
| * Collection of children retrieved |
| */ |
| private List<Object> fChildren = new ArrayList<>(); |
| |
| /** |
| * Constucts a monitor to retrieve and update the children of the given |
| * node. |
| * |
| * @param parent parent to retrieve children for |
| * @param model model being updated |
| */ |
| ChildrenRequestMonitor(ModelNode parent, AsynchronousModel model) { |
| super(parent, model); |
| } |
| |
| @Override |
| public void addChild(Object child) { |
| synchronized (fChildren) { |
| fChildren.add(child); |
| } |
| |
| scheduleViewerUpdate(250); |
| } |
| |
| @Override |
| public void addChildren(Object[] children) { |
| synchronized (fChildren) { |
| Collections.addAll(fChildren, children); |
| } |
| |
| scheduleViewerUpdate(0); |
| } |
| |
| @Override |
| protected boolean contains(AsynchronousRequestMonitor update) { |
| return (update instanceof ChildrenRequestMonitor) && contains(update.getNode()); |
| } |
| |
| @Override |
| protected void performUpdate() { |
| synchronized (fChildren) { |
| if (fFirstUpdate) { |
| getModel().setChildren(getNode(), fChildren); |
| fFirstUpdate = false; |
| } else { |
| for (Object child : fChildren) { |
| getModel().add(getNode(), child); |
| } |
| } |
| fChildren.clear(); |
| } |
| } |
| |
| } |