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


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.util.ArrayList JavaDoc;
25 import java.util.HashMap JavaDoc;
26
27 import org.jboss.aop.annotation.AnnotationElement;
28 import org.jboss.aspects.dbc.DesignByContractAspect;
29 import org.jboss.aspects.dbc.Invariant;
30 import org.jboss.aspects.dbc.StaticInvariant;
31
32 /**
33  *
34  * @author <a HREF="mailto:kabir.khan@jboss.org">Kabir Khan</a>
35  * @version $Revision: 37406 $
36  */
37 public class ConditionManager
38 {
39    public static HashMap JavaDoc preConditions = new HashMap JavaDoc();
40    public static HashMap JavaDoc postConditions = new HashMap JavaDoc();
41    public static HashMap JavaDoc invariants = new HashMap JavaDoc();
42    
43    public static synchronized InvariantCondition[] getInvariants(Class JavaDoc clazz)
44    {
45       InvariantCondition[] inv = (InvariantCondition[])invariants.get(clazz);
46       if (inv != null)
47       {
48          return inv;
49       }
50       
51       initialise(clazz);
52       return (InvariantCondition[])invariants.get(clazz);
53    }
54    
55    
56    protected static void initialise(Class JavaDoc clazz)
57    {
58       ArrayList JavaDoc invConds = new ArrayList JavaDoc();
59       
60       if (invariants.get(clazz) != null)
61       {
62          if (DesignByContractAspect.verbose)System.out.println("[dbc] Already have invariants for class: " + clazz);
63       }
64       
65       if (DesignByContractAspect.verbose)System.out.println("[dbc] ===== Initialising invariants for class: " + clazz);
66
67       //We need the @Invariant for this class and the super classes
68 Class JavaDoc curClazz = clazz;
69
70       while (curClazz != null)
71       {
72          addInvariantConditions(invConds, curClazz);
73             
74             Class JavaDoc[] interfaces = curClazz.getInterfaces();
75             for (int i = 0; i < interfaces.length ; i++)
76             {
77                addInvariantConditions(invConds, interfaces[i]);
78             }
79
80          curClazz = curClazz.getSuperclass();
81       }
82       
83       InvariantCondition[] inv = (InvariantCondition[])invConds.toArray(new InvariantCondition[invConds.size()]);
84       invariants.put(clazz, inv);
85    }
86
87    private static void addInvariantConditions(ArrayList JavaDoc conditions, Class JavaDoc clazz)
88    {
89       Invariant inv = (Invariant)AnnotationElement.getAnyAnnotation(clazz, Invariant.class);
90       if (inv != null)
91       {
92          if (DesignByContractAspect.verbose) System.out.println("[dbc] Found non-static invariants in class: " + clazz);
93          String JavaDoc[] exprs = inv.value();
94          if (exprs != null)
95          {
96             for (int i = 0 ; i < exprs.length ; i++)
97             {
98                conditions.add(new InvariantCondition(clazz, exprs[i], false));
99             }
100          }
101       }
102
103       StaticInvariant statinv = (StaticInvariant)AnnotationElement.getAnyAnnotation(clazz, StaticInvariant.class);
104       if (statinv != null)
105       {
106          if (DesignByContractAspect.verbose) System.out.println("[dbc] Found static invariants in class: " + clazz);
107          String JavaDoc[] exprs = statinv.value();
108          if (exprs != null)
109          {
110             for (int i = 0 ; i < exprs.length ; i++)
111             {
112                conditions.add(new InvariantCondition(clazz, exprs[i], true));
113             }
114          }
115       }
116    }
117 }
118
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