ScanFieldVisitor


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: ScanFieldVisitor.java 375 2006-04-21 08:21:41Z benoitf $
23   * --------------------------------------------------------------------------
24   */
25  
26  package org.objectweb.easybeans.deployment.annotations.analyzer;
27  
28  import org.objectweb.asm.FieldVisitor;
29  import org.objectweb.easybeans.deployment.annotations.JField;
30  import org.objectweb.easybeans.deployment.annotations.metadata.ClassAnnotationMetadata;
31  import org.objectweb.easybeans.deployment.annotations.metadata.FieldAnnotationMetadata;
32  
33  /**
34   * This classes analyses a given field and build/fill meta data information.
35   * @author Florent Benoit
36   */
37  public class ScanFieldVisitor extends ScanCommonVisitor<FieldAnnotationMetadata> implements FieldVisitor {
38  
39  
40      /**
41       * Class generated by the visitor which correspond to meta data contained in the parsed field.
42       */
43      private FieldAnnotationMetadata fieldAnnotationMetadata = null;
44  
45  
46      /**
47       * Parent of field annotation meta data that are built by this visitor.
48       */
49      private ClassAnnotationMetadata classAnnotationMetadata = null;
50  
51      /**
52       * Constructor.
53       * @param jField field object on which we set meta data.
54       * @param classAnnotationMetadata the parent object on which add generated meta-data.
55       */
56      public ScanFieldVisitor(final JField jField, final ClassAnnotationMetadata classAnnotationMetadata) {
57  
58          // object build and to fill
59          this.fieldAnnotationMetadata = new FieldAnnotationMetadata(jField, classAnnotationMetadata);
60  
61          // parent
62          this.classAnnotationMetadata = classAnnotationMetadata;
63  
64          // list of visitors to use
65          initVisitors();
66      }
67  
68      /**
69       * Build visitors used by this one.
70       */
71      private void initVisitors() {
72          super.initVisitors(fieldAnnotationMetadata);
73  
74      }
75  
76      /**
77       * Visits the end of the method. This method, which is the last one to be
78       * called, is used to inform the visitor that all the annotations and
79       * attributes of the method have been visited.
80       */
81      @Override  
82      public void visitEnd() {
83          classAnnotationMetadata.addFieldAnnotationMetadata(fieldAnnotationMetadata);
84      }
85  
86  }
87
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