JavaxPersistencePersistenceUnitsVisitor


1   /**
2    * EasyBeans
3    * Copyright (C) 2006 Bull S.A.S.
4    * Contact: easybeans@objectweb.org
5    *
6    * This library is free software; you can redistribute it and/or
7    * modify it under the terms of the GNU Lesser General Public
8    * License as published by the Free Software Foundation; either
9    * version 2.1 of the License, or any later version.
10   *
11   * This library 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 GNU
14   * Lesser General Public License for more details.
15   *
16   * You should have received a copy of the GNU Lesser General Public
17   * License along with this library; if not, write to the Free Software
18   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
19   * USA
20   *
21   * --------------------------------------------------------------------------
22   * $Id: JavaxPersistencePersistenceUnitsVisitor.java 445 2006-05-10 16:28:59Z benoitf $
23   * --------------------------------------------------------------------------
24   */
25  
26  package org.objectweb.easybeans.deployment.annotations.analyzer.classes;
27  
28  import java.util.ArrayList  ;
29  import java.util.List  ;
30  
31  import org.objectweb.easybeans.deployment.annotations.analyzer.JavaxPersistencePersistenceUnitVisitor;
32  import org.objectweb.easybeans.deployment.annotations.impl.JavaxPersistenceUnit;
33  import org.objectweb.easybeans.deployment.annotations.metadata.ClassAnnotationMetadata;
34  
35  /**
36   * This class manages the handling of &#64;{@link javax.persistence.PersistenceUnits}
37   * annotation.
38   * @author Florent Benoit
39   */
40  public class JavaxPersistencePersistenceUnitsVisitor extends
41          JavaxPersistencePersistenceUnitVisitor<ClassAnnotationMetadata> {
42  
43      /**
44       * Type of annotation.
45       */
46      public static final String   TYPE = "Ljavax/persistence/PersistenceUnits;";
47  
48      /**
49       * List of JavaxPersistenceUnit object.
50       */
51      private List  <JavaxPersistenceUnit> javaxPersistenceUnits = null;
52  
53      /**
54       * Object is added to the list.
55       */
56      private boolean isAdded = false;
57  
58      /**
59       * Constructor.
60       * @param annotationMetadata linked to a class or method metadata
61       */
62      public JavaxPersistencePersistenceUnitsVisitor(final ClassAnnotationMetadata annotationMetadata) {
63          super(annotationMetadata);
64          javaxPersistenceUnits = new ArrayList  <JavaxPersistenceUnit>();
65      }
66  
67      /**
68       * Visits a primitive value of the annotation.<br>
69       * @param name the value name.
70       * @param value the actual value, whose type must be {@link Byte},
71       *        {@link Boolean}, {@link Character}, {@link Short},
72       *        {@link Integer}, {@link Long}, {@link Float}, {@link Double},
73       *        {@link String} or {@link org.objectweb.asm.Type}.
74       */
75      @Override  
76      public void visit(final String   name, final Object   value) {
77          // list not empty, need to create another reference
78          // at the first item found
79          if (javaxPersistenceUnits.size() > 0 && isAdded) {
80              setjavaxPersistenceUnit(new JavaxPersistenceUnit());
81              isAdded = false;
82          }
83  
84          // do super code
85          super.visit(name, value);
86      }
87  
88      /**
89       * Visits the end of the annotation. <br>
90       * Creates the object and store it.
91       */
92      @Override  
93      public void visitEnd() {
94          // add object in the list
95          if (!isAdded) {
96              javaxPersistenceUnits.add(getJavaxPersistenceUnit());
97              isAdded = true;
98          }
99  
100         // update list
101         getAnnotationMetadata().setJavaxPersistencePersistenceUnits(javaxPersistenceUnits);
102     }
103 
104     /**
105      * @return type of the annotation (its description)
106      */
107     @Override  
108     public String   getType() {
109         return TYPE;
110     }
111 
112 }
113
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