| /******************************************************************************* |
| * Copyright (c) 2005, 2013 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.debug.internal.ui.viewers; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| 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); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.ui.viewers.IChildrenRequestMonitor#addChild(java.lang.Object) |
| */ |
| @Override |
| public void addChild(Object child) { |
| synchronized (fChildren) { |
| fChildren.add(child); |
| } |
| |
| scheduleViewerUpdate(250); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.ui.viewers.IChildrenRequestMonitor#addChildren(java.lang.Object[]) |
| */ |
| @Override |
| public void addChildren(Object[] children) { |
| synchronized (fChildren) { |
| for (int i = 0; i < children.length; i++) { |
| fChildren.add(children[i]); |
| } |
| } |
| |
| scheduleViewerUpdate(0); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.ui.viewers.AsynchronousRequestMonitor#contains(org.eclipse.debug.ui.viewers.AsynchronousRequestMonitor) |
| */ |
| @Override |
| protected boolean contains(AsynchronousRequestMonitor update) { |
| return (update instanceof ChildrenRequestMonitor) && contains(update.getNode()); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.ui.viewers.AsynchronousRequestMonitor#performUpdate() |
| */ |
| @Override |
| protected void performUpdate() { |
| synchronized (fChildren) { |
| if (fFirstUpdate) { |
| getModel().setChildren(getNode(), fChildren); |
| fFirstUpdate = false; |
| } else { |
| for (Iterator<Object> iter = fChildren.iterator(); iter.hasNext();) { |
| Object child = iter.next(); |
| getModel().add(getNode(), child); |
| } |
| } |
| fChildren.clear(); |
| } |
| } |
| |
| } |