KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > caucho > amber > type > ClassType


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free Software Foundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.amber.type;
30
31 import com.caucho.amber.AmberException;
32 import com.caucho.java.JavaWriter;
33 import com.caucho.util.L10N;
34
35 import java.io.IOException JavaDoc;
36 import java.sql.ResultSet JavaDoc;
37 import java.sql.SQLException JavaDoc;
38
39 /**
40  * A property containing a class
41  */
42 public class ClassType extends Type {
43   private static final L10N L = new L10N(ClassType.class);
44
45   private static final ClassType CLASS_TYPE = new ClassType();
46
47   private ClassType()
48   {
49   }
50
51   /**
52    * Returns the singleton Class type.
53    */
54   public static ClassType create()
55   {
56     return CLASS_TYPE;
57   }
58
59   /**
60    * Returns the type name.
61    */
62   public String JavaDoc getName()
63   {
64     return "java.lang.Class";
65   }
66
67   /**
68    * Generates a string to load the property.
69    */
70   public int generateLoad(JavaWriter out, String JavaDoc rs,
71               String JavaDoc indexVar, int index)
72     throws IOException JavaDoc
73   {
74     out.print("com.caucho.amber.type.ClassType.toClass(" + rs + ".getString(" + indexVar + " + " + index + "))");
75
76     return index + 1;
77   }
78
79   /**
80    * Generates a string to set the property.
81    */
82   public void generateSet(JavaWriter out, String JavaDoc pstmt,
83               String JavaDoc index, String JavaDoc value)
84     throws IOException JavaDoc
85   {
86     out.println("if (" + value + " == null)");
87     out.println(" " + pstmt + ".setNull(" + index + "++, java.sql.Types.VARCHAR);");
88     out.println("else");
89     out.println(" " + pstmt + ".setString(" + index + "++, " + value + ".getName());");
90   }
91
92   /**
93    * Generates a string to set the property.
94    */
95   public void generateSetNull(JavaWriter out, String JavaDoc pstmt, String JavaDoc index)
96     throws IOException JavaDoc
97   {
98     out.println(pstmt + ".setNull(" + index + "++, java.sql.Types.VARCHAR);");
99   }
100
101   /**
102    * Gets the value.
103    */
104   public static Class JavaDoc toClass(String JavaDoc name)
105     throws SQLException JavaDoc
106   {
107     if (name == null)
108       return null;
109
110     try {
111       ClassLoader JavaDoc loader = Thread.currentThread().getContextClassLoader();
112       
113       return Class.forName(name, false, loader);
114     } catch (ClassNotFoundException JavaDoc e) {
115       throw new AmberException(e);
116     }
117   }
118
119   /**
120    * Gets the value.
121    */
122   public Object JavaDoc getObject(ResultSet JavaDoc rs, int index)
123     throws SQLException JavaDoc
124   {
125     return toClass(rs.getString(index));
126   }
127 }
128
Popular Tags