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Java > Open Source Codes > org > jboss > aspects > dbc > condition > ConstructorCondition


1 /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2005, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
6   *
7   * This is free software; you can redistribute it and/or modify it
8   * under the terms of the GNU Lesser General Public License as
9   * 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 org.jboss.aspects.dbc.condition;
23
24 import java.lang.reflect.Constructor JavaDoc;
25
26 import org.jboss.aop.joinpoint.Invocation;
27
28 /**
29  *
30  * @author <a HREF="mailto:kabir.khan@jboss.org">Kabir Khan</a>
31  * @version $Revision: 37406 $
32  */
33 public class ConstructorCondition extends ExecutableCondition
34 {
35    Constructor JavaDoc constructor;
36    
37    public ConstructorCondition(Constructor JavaDoc constructor, String JavaDoc condExpr)
38    {
39       super(condExpr, constructor.getClass(), false);
40       this.constructor = constructor;
41    }
42    
43    public boolean equals(Object JavaDoc o)
44    {
45       if (o instanceof ConstructorCondition)
46       {
47          ConstructorCondition cc = (ConstructorCondition)o;
48          if (cc.constructor.equals(constructor))
49          {
50             return super.equals(o);
51          }
52       }
53       return false;
54    }
55
56    // ExecutableCondition implementation -------------------------------------
57 protected Object JavaDoc executableObject()
58    {
59       return constructor;
60    }
61
62    protected Class JavaDoc[] parameterTypes()
63    {
64       return constructor.getParameterTypes();
65    }
66    
67    protected boolean isPredefinedToken(String JavaDoc token)
68    {
69       return token.equals(Condition.TARGET);
70    }
71    
72    protected Object JavaDoc getValueForPredefinedToken(Invocation invocation, Object JavaDoc rtn, String JavaDoc token)
73    {
74       if (token.equals(Condition.TARGET))
75       {
76          //For constructors the $tgt token corresponds to the return of the method
77 return rtn;
78       }
79
80       return null;
81    }
82 }
83
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