Fixed all line endings of the repository
[simantics/platform.git] / bundles / org.simantics.browsing.ui.common / src / org / simantics / browsing / ui / common / viewpoints / LazyContainerViewpoint.java
1 /*******************************************************************************
2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
3  * in Industry THTH ry.
4  * All rights reserved. This program and the accompanying materials
5  * are made available under the terms of the Eclipse Public License v1.0
6  * which accompanies this distribution, and is available at
7  * http://www.eclipse.org/legal/epl-v10.html
8  *
9  * Contributors:
10  *     VTT Technical Research Centre of Finland - initial API and implementation
11  *******************************************************************************/
12 package org.simantics.browsing.ui.common.viewpoints;
13
14 import org.simantics.browsing.ui.NodeContext;
15 import org.simantics.browsing.ui.PrimitiveQueryUpdater;
16 import org.simantics.browsing.ui.content.Viewpoint;
17
18 public class LazyContainerViewpoint implements Viewpoint {
19
20     private NodeContext[] children = Viewpoint.PENDING_CHILDREN;
21     private Boolean        hasChildren = Viewpoint.PENDING_HAS_CHILDREN;
22
23     public LazyContainerViewpoint() {
24     }
25
26     public LazyContainerViewpoint(NodeContext[] children) {
27         this.children = children;
28         this.hasChildren = children.length > 0;
29     }
30
31     public void setChildren(PrimitiveQueryUpdater updater, NodeContext[] children) {
32         for(NodeContext c : children) updater.incRef(c);
33         for(NodeContext c : this.children) updater.decRef(c);
34         this.children = children;
35     }
36
37     public void setHasChildren(Boolean hasChildren) {
38         this.hasChildren = hasChildren;
39     }
40
41     @Override
42     public NodeContext[] getChildren() {
43         return children;
44     }
45
46     @Override
47     public Boolean getHasChildren() {
48         return hasChildren;
49     }
50
51 }