01: /**
02: * L2FProd.com Common Components 7.3 License.
03: *
04: * Copyright 2005-2007 L2FProd.com
05: *
06: * Licensed under the Apache License, Version 2.0 (the "License");
07: * you may not use this file except in compliance with the License.
08: * You may obtain a copy of the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing, software
13: * distributed under the License is distributed on an "AS IS" BASIS,
14: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15: * See the License for the specific language governing permissions and
16: * limitations under the License.
17: */package com.l2fprod.common.swing.tree;
18:
19: import javax.swing.tree.DefaultMutableTreeNode;
20:
21: /**
22: * LazyMutableTreeNode. <br>
23: *
24: */
25: public abstract class LazyMutableTreeNode extends
26: DefaultMutableTreeNode {
27:
28: private boolean loaded = false;
29:
30: public LazyMutableTreeNode() {
31: super ();
32: }
33:
34: public LazyMutableTreeNode(Object userObject) {
35: super (userObject);
36: }
37:
38: public LazyMutableTreeNode(Object userObject, boolean allowsChildren) {
39: super (userObject, allowsChildren);
40: }
41:
42: public int getChildCount() {
43: synchronized (this ) {
44: if (!loaded) {
45: loaded = true;
46: loadChildren();
47: }
48: }
49: return super .getChildCount();
50: }
51:
52: public void clear() {
53: removeAllChildren();
54: loaded = false;
55: }
56:
57: public boolean isLoaded() {
58: return loaded;
59: }
60:
61: protected abstract void loadChildren();
62:
63: }
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