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Java > Open Source Codes > org > hammurapi > inspectors > ThreadYieldRule


1 /*
2  * Hammurapi
3  * Automated Java code review system.
4  * Copyright (C) 2004 Hammurapi Group
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  * URL: http://www.hammurapi.org
21  * e-Mail: support@hammurapi.biz
22  */

23 package org.hammurapi.inspectors;
24
25 import org.hammurapi.InspectorBase;
26
27 import com.pavelvlasov.jsel.JselException;
28 import com.pavelvlasov.jsel.LanguageElement;
29 import com.pavelvlasov.jsel.OperationInfo;
30 import com.pavelvlasov.jsel.expressions.MethodCall;
31 import com.pavelvlasov.review.SourceMarker;
32
33 /**
34  * ER-106
35  * Avoid using 'Thread.yield'
36  * @author Pavel Vlasov
37  * @version $Revision: 1.2 $
38  */

39 public class ThreadYieldRule extends InspectorBase {
40
41     /**
42      * yield belongs to this class
43      */

44     private static final String JavaDoc VIOLATION_CLASS = "java.lang.Thread";
45     
46     /**
47      * The method yield is the subject of this rule.
48      */

49     private static final String JavaDoc VIOLATION_METHOD = "yield";
50     
51     /**
52      * Reviews the methodcalls to yield, since they are violations.
53      *
54      * @param element the methodcall to be reviewed.
55      */

56     public void visit(MethodCall element) {
57         try {
58             OperationInfo provider=element.getProvider();
59             if (provider==null) {
60                 context.warn((SourceMarker) element, "Provider is null for "+element+" at "+((LanguageElement) element).getLocation());
61             } else if (VIOLATION_METHOD.equals(provider.getName()) && provider.getParameterTypes().length==0 && provider.getDeclaringType().isKindOf(VIOLATION_CLASS)) {
62                 context.reportViolation((SourceMarker) element);
63             }
64         } catch (JselException e) {
65             context.warn((SourceMarker) element, e);
66         }
67     }
68
69 }
70
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