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Java > Open Source Codes > classycle > classfile > ClassConstant


1 /*
2  * Copyright (c) 2003-2006, Franz-Josef Elmer, All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are met:
6  *
7  * - Redistributions of source code must retain the above copyright notice,
8  * this list of conditions and the following disclaimer.
9  * - Redistributions in binary form must reproduce the above copyright notice,
10  * this list of conditions and the following disclaimer in the documentation
11  * and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
14  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
15  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
20  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
21  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
22  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
23  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  */

25 package classycle.classfile;
26
27 /**
28  * Class constant. Refers to an instance of {@link UTF8Constant} which
29  * holds the fully qualifies class name.
30  *
31  * @author Franz-Josef Elmer
32  */

33 public class ClassConstant extends Constant {
34   private final int _nameIndex;
35
36   /**
37    * Creates an instance for the specified index refering an
38    * {@link UTF8Constant}.
39    * @param pool Pool of all {@link Constant Constants}.
40    * @param nameIndex Index into <tt>pool</tt>.
41    */

42   public ClassConstant(Constant[] pool, int nameIndex) {
43     super(pool);
44     _nameIndex = nameIndex;
45   }
46
47   
48   /**
49    * Returns the fully-qualified class name. In the case of an object array
50    * only the class name of the object is returned.
51    * @return fully-qualified class name in standard notation with '.'.
52    */

53   public String JavaDoc getName() {
54     String JavaDoc result = null;
55     Constant c = getConstant(_nameIndex);
56     if (c instanceof UTF8Constant) {
57       result = ((UTF8Constant) c).getString().replace('/', '.');
58       if (result.startsWith("[")) {
59         // An array class: Extract class name
60
int index = result.indexOf('L');
61         if (index > 0) {
62           result = result.substring(index + 1, result.length() - 1);
63         }
64       }
65     }
66     return result;
67   }
68
69   /** Returns the constant type and the class name. */
70   public String JavaDoc toString() {
71     return "CONSTANT_Class: " + getName();
72   }
73 } //class
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