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Java > Open Source Codes > org > eclipse > debug > internal > ui > elements > adapters > DeferredRegisterGroup


1 /*******************************************************************************
2  * Copyright (c) 2000, 2005 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/

11 package org.eclipse.debug.internal.ui.elements.adapters;
12
13 import org.eclipse.core.runtime.IProgressMonitor;
14 import org.eclipse.debug.core.DebugException;
15 import org.eclipse.debug.core.model.IRegisterGroup;
16 import org.eclipse.debug.core.model.IValue;
17 import org.eclipse.debug.core.model.IVariable;
18 import org.eclipse.debug.internal.ui.views.variables.RemoteVariableContentManager;
19 import org.eclipse.debug.ui.DeferredDebugElementWorkbenchAdapter;
20 import org.eclipse.ui.progress.IElementCollector;
21
22 public class DeferredRegisterGroup extends DeferredDebugElementWorkbenchAdapter {
23
24     /* (non-Javadoc)
25      * @see org.eclipse.ui.model.IWorkbenchAdapter#getChildren(java.lang.Object)
26      */

27     public Object JavaDoc[] getChildren(Object JavaDoc parent) {
28         try {
29             return ((IRegisterGroup)parent).getRegisters();
30         } catch (DebugException e) {
31         }
32         return EMPTY;
33     }
34     
35     /* (non-Javadoc)
36      * @see org.eclipse.ui.model.IWorkbenchAdapter#getParent(java.lang.Object)
37      */

38     public Object JavaDoc getParent(Object JavaDoc element) {
39         return null;
40     }
41     
42     /* (non-Javadoc)
43      * @see org.eclipse.ui.progress.IDeferredWorkbenchAdapter#fetchDeferredChildren(java.lang.Object, org.eclipse.ui.progress.IElementCollector, org.eclipse.core.runtime.IProgressMonitor)
44      */

45     public void fetchDeferredChildren(Object JavaDoc object, IElementCollector collector, IProgressMonitor monitor) {
46         if (monitor.isCanceled()) {
47             return;
48         }
49         Object JavaDoc[] children = getChildren(object);
50         if (monitor.isCanceled()) {
51             return;
52         }
53         if (children.length > 0) {
54             if (collector instanceof RemoteVariableContentManager.VariableCollector) {
55                 RemoteVariableContentManager.VariableCollector remoteCollector = (RemoteVariableContentManager.VariableCollector) collector;
56                 for (int i = 0; i < children.length; i++) {
57                     if (monitor.isCanceled()) {
58                         return;
59                     }
60                     Object JavaDoc child = children[i];
61                     remoteCollector.setHasChildren(child, hasChildren(child));
62                 }
63             }
64             collector.add(children, monitor);
65         }
66         collector.done();
67     }
68
69     protected boolean hasChildren(Object JavaDoc child) {
70         if (child instanceof IVariable) {
71             IVariable var = (IVariable) child;
72             try {
73                 IValue value = var.getValue();
74                 return value.hasVariables();
75             } catch (DebugException e) {
76             }
77         }
78         return false;
79     }
80 }
81
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