Reader


1   package org.objectweb.modfact.jmi.ps;
2   import javax.jmi.reflect.*;
3   import java.util.*;
4   import java.sql.*;
5   /**
6    * @author gregory
7    * This class is a wrapper for accessing the database and read a metamodel from
8    * in order to build the metamodel in the M2 repository given as a parameter.
9    * The granulariry of reading is the metamodel
10   */
11  public class Reader {
12  
13      Connection connection;
14      MOFPolymorphicIterator mofIt;
15      MOFPolymorphicIterator mofModelIt;
16      RefPackage mofModel;
17      String   modelName;
18  
19      Hashtable object2ContainerMofId;
20      Hashtable mofId2object;
21      Hashtable referenceObject2referencedEndmofId;
22  
23      List allRefObjects;
24      String   mofId;
25      RefObject containerObject;
26  
27      /**
28       * Method Reader.
29       * @param modelName
30       * @param repository
31       * @throws ClassNotFoundException
32       * @throws SQLException
33       * 
34       * read the model uniquely identified by its name and store it
35       * into the repository
36       */
37      public Reader(String   modelName, RefPackage repository)
38          throws ClassNotFoundException  , SQLException {
39  
40          Class.forName("com.mysql.jdbc.Driver");
41          String   url = "jdbc:mysql://localhost:3306/test";
42          connection = DriverManager.getConnection(url);
43          this.modelName = modelName;
44          this.mofModel = repository;
45          this.mofId2object = new Hashtable();
46          this.object2ContainerMofId = new Hashtable();
47          this.referenceObject2referencedEndmofId = new Hashtable();
48          this.allRefObjects = new Vector();
49      }
50  
51      /**
52       * Method read.
53       * 
54       * the building of me metamodel in the repository is done in a two pass way.
55       * because of dependencies between the repository object.
56       * The necessary information are temporary stored in hashtables.
57       */
58      public void read() {
59          RefObject oo = null;
60          RefObject o = null;
61          Vector params = new Vector();
62  
63          String   query =
64              "SELECT * FROM RefPackage WHERE ModelContainerId='"
65                  + PersistantHelper.getModelIdbyName(modelName)
66                  + "';";
67  
68          try {
69              Statement statement = connection.createStatement();
70              ResultSet rs = statement.executeQuery(query);
71              while (rs.next()) {
72  
73                  if (rs.getString("type").equals("RefPackage")) {
74  
75                      o = mofModel.refClass("Package").refCreateInstance(null);
76                      o.refSetValue("name", rs.getString("name"));
77                      o.refSetValue("annotation", rs.getString("annotation"));
78                      o.refSetValue("isRoot", rs.getString("isRoot"));
79                      o.refSetValue("isLeaf", rs.getString("isLeaf"));
80                      o.refSetValue("isAbstract", rs.getString("isAbstract"));
81                      o.refSetValue("visibility", rs.getString("visibility"));
82  
83                      object2ContainerMofId.put(o, rs.getString("container"));
84                      mofId2object.put(rs.getString("RefPackageId"), o);
85                      allRefObjects.add(o);
86  
87                  }
88  
89                  if (rs.getString("type").equals("RefClass")) {
90  
91                      params.addElement(rs.getString("name"));
92                      params.addElement(rs.getString("annotation"));
93                      params.addElement(rs.getString("isRoot"));
94                      params.addElement(rs.getString("isLeaf"));
95                      params.addElement(rs.getString("isAbstract"));
96                      params.addElement(rs.getString("visibility"));
97                      params.addElement(rs.getString("isSingleton"));
98  
99                      o = mofModel.refClass("Class").refCreateInstance(params);
100 
101                     params.removeAllElements();
102                     object2ContainerMofId.put(o, rs.getString("container"));
103                     mofId2object.put(rs.getString("RefPackageId"), o);
104                     allRefObjects.add(o);
105                 }
106 
107                 if (rs.getString("type").equals("RefAssociation")) {
108 
109                     params.addElement(rs.getString("name"));
110                     params.addElement(rs.getString("annotation"));
111                     params.addElement(rs.getString("isRoot"));
112                     params.addElement(rs.getString("isLeaf"));
113                     params.addElement(rs.getString("isAbstract"));
114                     params.addElement(rs.getString("visibility"));
115                     params.addElement(rs.getString("isDerived"));
116                     
117                     o = mofModel.refClass("Association").refCreateInstance(
118                             params);
119                     params.removeAllElements();
120                     object2ContainerMofId.put(o, rs.getString("container"));
121                     mofId2object.put(rs.getString("RefPackageId"), o);
122                     allRefObjects.add(o);
123                 }
124                 if (rs.getString("type").equals("RefAssociationEnd")) {
125 
126                     o =
127                         mofModel.refClass("AssociationEnd").refCreateInstance(
128                             null);
129                     o.refSetValue("name", rs.getString("name"));
130                     o.refSetValue("annotation", rs.getString("annotation"));
131                     o.refSetValue("isNavigable", rs.getString("isNavigable"));
132                     o.refSetValue("aggregation", rs.getString("aggregation"));
133                     o.refSetValue("multiplicity", rs.getString("multiplicity"));
134                     o.refSetValue("isChangeable", rs.getString("isChangeable"));
135 
136                     object2ContainerMofId.put(o, rs.getString("container"));
137                     mofId2object.put(rs.getString("RefPackageId"), o);
138                     allRefObjects.add(o);
139                 }
140 
141                 if (rs.getString("type").equals("RefAttribute")) {
142 
143                     o = mofModel.refClass("Attribute").refCreateInstance(null);
144                     o.refSetValue("name", rs.getString("name"));
145                     o.refSetValue("annotation", rs.getString("annotation"));
146                     o.refSetValue("visibility", rs.getString("visibility"));
147                     o.refSetValue("scope", rs.getString("scope"));
148                     o.refSetValue("isChangeable", rs.getString("isChangeable"));
149                     o.refSetValue("multiplicity", rs.getString("multiplicity"));
150                     o.refSetValue("isDerived", rs.getString("isDerived"));
151 
152                     object2ContainerMofId.put(o, rs.getString("container"));
153                     mofId2object.put(rs.getString("RefPackageId"), o);
154                     allRefObjects.add(o);
155                 }
156 
157                 if (rs.getString("type").equals("RefReference")) {
158 
159                     o = mofModel.refClass("Reference").refCreateInstance(null);
160                     o.refSetValue("name", rs.getString("name"));
161                     o.refSetValue("annotation", rs.getString("annotation"));
162                     o.refSetValue("visibility", rs.getString("visibility"));
163                     o.refSetValue("scope", rs.getString("scope"));
164                     o.refSetValue("isChangeable", rs.getString("isChangeable"));
165                     o.refSetValue("multiplicity", rs.getString("multiplicity"));
166 
167                     object2ContainerMofId.put(o, rs.getString("container"));
168                     mofId2object.put(rs.getString("RefPackageId"), o);
169 
170                     referenceObject2referencedEndmofId.put(
171                         o,
172                         rs.getString("referencedEnd"));
173 
174                     allRefObjects.add(o);
175                 }
176 
177                 if (rs.getString("type").equals("Tag")) {
178 
179                     o = mofModel.refClass("Tag").refCreateInstance(null);
180                     o.refSetValue("name", rs.getString("name"));
181                     o.refSetValue("annotation", rs.getString("annotation"));
182                     o.refSetValue("tagId", rs.getString("tagId"));
183                     o.refSetValue("values", rs.getString("tagtagIdalues"));
184                     o.refSetValue("elements", rs.getString("taggedElements"));
185 
186                     object2ContainerMofId.put(o, rs.getString("container"));
187                     mofId2object.put(rs.getString("RefPackageId"), o);
188                     allRefObjects.add(o);
189                 }
190 
191             } //end while
192 
193             rs.close();
194             statement.close();
195 
196             //Get the reference of the container object and set this property
197             Iterator it = allRefObjects.iterator();
198             while (it.hasNext()) {
199 
200                 oo = (RefObject) it.next();
201                 mofId = object2ContainerMofId.get(oo).toString();
202                 containerObject = (RefObject) mofId2object.get(mofId);
203                 oo.refSetValue("container", containerObject);
204             }
205 
206             //Set the referenceEnd property for reference objects
207             it = allRefObjects.iterator();
208             while (it.hasNext()) {
209 
210                 oo = (RefObject) it.next();
211 
212                 if (oo
213                     .refMetaObject()
214                     .refGetValue("name")
215                     .equals("Reference")) {
216                     mofId =
217                         referenceObject2referencedEndmofId.get(oo).toString();
218                     oo.refSetValue("referencedEnd", mofId2object.get(mofId));
219                 }
220 
221             }
222 
223         } catch (Exception   e) {
224             e.printStackTrace();
225         }
226 
227     }
228 
229 }
230
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