01: /*
02: * JBoss, Home of Professional Open Source.
03: * Copyright 2006, Red Hat Middleware LLC, and individual contributors
04: * as indicated by the @author tags. See the copyright.txt file in the
05: * distribution for a full listing of individual contributors.
06: *
07: * This is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU Lesser General Public License as
09: * published by the Free Software Foundation; either version 2.1 of
10: * the License, or (at your option) any later version.
11: *
12: * This software is distributed in the hope that it will be useful,
13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15: * Lesser General Public License for more details.
16: *
17: * You should have received a copy of the GNU Lesser General Public
18: * License along with this software; if not, write to the Free
19: * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21: */
22: package javax.management;
23:
24: /**
25: * Get the class name of the mbean
26: *
27: * <p><b>Revisions:</b>
28: * <p><b>20020317 Adrian Brock:</b>
29: * <ul>
30: * <li>Make queries thread safe
31: * </ul>
32: *
33: * @author <a href="mailto:Adrian.Brock@HappeningTimes.com">Adrian Brock</a>.
34: * @version $Revision: 57200 $
35: */
36: class ClassAttributeValueExp extends AttributeValueExp {
37: // Constants ---------------------------------------------------
38:
39: private static final long serialVersionUID = -1081892073854801359L;
40:
41: /* WTF? This is in the javadoc and it has this value in the RI */
42: String attr = "Class";
43:
44: // Attributes --------------------------------------------------
45:
46: // Static -----------------------------------------------------
47:
48: // Constructors ------------------------------------------------
49:
50: /**
51: * Construct an class attribute value expression
52: */
53: public ClassAttributeValueExp() {
54: // REVIEW: Correct?
55: super (null);
56: }
57:
58: // Public ------------------------------------------------------
59:
60: // ValueExp Implementation -------------------------------------
61:
62: public ValueExp apply(ObjectName name)
63: throws BadStringOperationException,
64: BadBinaryOpValueExpException,
65: BadAttributeValueExpException, InvalidApplicationException {
66: try {
67: ObjectInstance instance = QueryEval.getMBeanServer()
68: .getObjectInstance(name);
69: return Query.value(instance.getClassName());
70: } catch (Exception e) {
71: // REVIEW: Correct?
72: throw new InvalidApplicationException(name);
73: }
74: }
75:
76: // Object overrides --------------------------------------------
77:
78: public String toString() {
79: return new String("class");
80: }
81:
82: // Protected ---------------------------------------------------
83:
84: // Package Private ---------------------------------------------
85:
86: // Private -----------------------------------------------------
87:
88: // Inner Classes -----------------------------------------------
89: }
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