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


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.java.JavaWriter;
32 import com.caucho.util.L10N;
33
34 import java.io.IOException JavaDoc;
35 import java.sql.ResultSet JavaDoc;
36 import java.sql.SQLException JavaDoc;
37
38 /**
39  * The type of a property.
40  */
41 public class YesNoType extends Type {
42   private static final L10N L = new L10N(YesNoType.class);
43
44   private static final YesNoType YES_NO_TYPE = new YesNoType();
45
46   private YesNoType()
47   {
48   }
49
50   /**
51    * Returns the singleton type.
52    */
53   public static YesNoType create()
54   {
55     return YES_NO_TYPE;
56   }
57
58   /**
59    * Returns the type name.
60    */
61   public String JavaDoc getName()
62   {
63     return "java.lang.Boolean";
64   }
65
66   /**
67    * Generates a string to load the property.
68    */
69   public int generateLoad(JavaWriter out, String JavaDoc rs,
70               String JavaDoc indexVar, int index)
71     throws IOException JavaDoc
72   {
73     out.print("com.caucho.amber.type.YesNoType.toBoolean(" +
74           rs + ".getString(" + indexVar + " + " + index + "), " +
75           rs + ".wasNull())");
76
77     return index + 1;
78   }
79
80   /**
81    * Generates a string to set the property.
82    */
83   public void generateSet(JavaWriter out, String JavaDoc pstmt,
84               String JavaDoc index, String JavaDoc value)
85     throws IOException JavaDoc
86   {
87     out.println("if (" + value + " == null)");
88     out.println(" " + pstmt + ".setNull(" + index + "++, 0);");
89     out.println("else");
90     out.println(" " + pstmt + ".setString(" + index + "++, " +
91         value + ".booleanValue() ? \"y\" : \"n\");");
92   }
93
94   /**
95    * Converts a value to a boolean.
96    */
97   public static Boolean JavaDoc toBoolean(String JavaDoc value, boolean wasNull)
98   {
99     if (wasNull)
100       return null;
101     else if ("y".equalsIgnoreCase(value))
102       return Boolean.TRUE;
103     else if ("n".equalsIgnoreCase(value))
104       return Boolean.FALSE;
105     else
106       return Boolean.FALSE;
107   }
108
109   /**
110    * Gets the value.
111    */
112   public Object JavaDoc getObject(ResultSet JavaDoc rs, int index)
113     throws SQLException JavaDoc
114   {
115     String JavaDoc value = rs.getString(index);
116
117     if (rs.wasNull())
118       return null;
119     else if ("y".equalsIgnoreCase(value))
120       return Boolean.TRUE;
121     else if ("n".equalsIgnoreCase(value))
122       return Boolean.FALSE;
123     else
124       return Boolean.FALSE;
125   }
126 }
127
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