FileHandler


1   /***************************************
2    *                                     *
3    *  JBoss: The OpenSource J2EE WebOS   *
4    *                                     *
5    *  Distributable under LGPL license.  *
6    *  See terms of license at gnu.org.   *
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8    ***************************************/
9   
10  package org.jboss.util.coerce;
11  
12  import org.jboss.util.CoercionException;
13  import org.jboss.util.NotCoercibleException;
14  
15  import java.io.File  ;
16  
17  /**
18   * A <tt>java.io.File</tt> coercion handler.
19   *
20   * @version <tt>$Revision: 1.3 $</tt>
21   * @author  <a HREF="mailto:jason@planet57.com">Jason Dillon</a>
22   */
23  public class FileHandler
24     extends BoundCoercionHandler
25  {
26     /**
27      * Get the target class type for this <tt>CoercionHandler</tt>.
28      *
29      * @return  <tt>Class</tt> type.
30      */
31     public Class   getType() {
32        return File  .class;
33     }
34  
35     /**
36      * Coerces the given value into the given type (which should be
37      * <tt>File</tt>).
38      *
39      * <p>This currently only support coercion from a <tt>String</tt>
40      *
41      * @param value   Value to coerce.
42      * @param type    <tt>File</tt>.
43      * @return        Value coerced into a <tt>File</tt>.
44      *
45      * @throws CoercionException  Failed to coerce.
46      */
47     public Object   coerce(Object   value, Class   type) throws CoercionException {
48        if (value.getClass().equals(String  .class)) {
49           return coerce((String  )value);
50        }
51        
52        throw new NotCoercibleException(value);
53     }
54  
55     /**
56      * Coerces the given String into a <tt>File</tt> by creating attempting
57      * to create a new file for the given filename.
58      *
59      * @param value   The name of the file to create.
60      * @return        <tt>File</tt>
61      *
62      * @throws NotCoercibleException    Failed to create file.
63      */
64     public Object   coerce(String   value) {
65        return new File  (value);
66     }
67  }
68  
69
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