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Java > Open Source Codes > org > netbeans > modules > javacore > jmiimpl > javamodel > ElementFinder


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19
20 package org.netbeans.modules.javacore.jmiimpl.javamodel;
21
22 import org.netbeans.jmi.javamodel.*;
23 import java.util.*;
24 import org.openide.text.PositionBounds;
25
26 /**
27  * @author Jan Becicka
28  */
29 public class ElementFinder {
30
31     private Resource resource;
32
33     public ElementFinder(Resource resource) {
34         this.resource = resource;
35     }
36
37     public Element getElementByOffset(int position) {
38         LinkedList queue = new LinkedList();
39         queue.addFirst(resource);
40         Element last = resource;
41         while (!queue.isEmpty()) {
42             MetadataElement el = (MetadataElement) queue.removeLast();
43             PositionBounds b = el.getPosition(false);
44             if (b.getBegin().getOffset() <= position && b.getEnd().getOffset() > position) {
45                 last = el;
46                 Collection children = el.getChildren();
47                 if (children.isEmpty()) {
48                     return el;
49                 }
50                 queue.addAll(children);
51             }
52         }
53         return last;
54     }
55
56 }
57
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