Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
ProxyFactory |
|
| 1.0;1 |
1 | /* | |
2 | * Licensed to the Apache Software Foundation (ASF) under one or more | |
3 | * contributor license agreements. See the NOTICE file distributed with | |
4 | * this work for additional information regarding copyright ownership. | |
5 | * The ASF licenses this file to You under the Apache License, Version 2.0 | |
6 | * (the "License"); you may not use this file except in compliance with | |
7 | * the License. You may obtain a copy of the License at | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
11 | * Unless required by applicable law or agreed to in writing, software | |
12 | * distributed under the License is distributed on an "AS IS" BASIS, | |
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
14 | * See the License for the specific language governing permissions and | |
15 | * limitations under the License. | |
16 | */ | |
17 | package org.apache.commons.dbutils; | |
18 | ||
19 | import java.lang.reflect.InvocationHandler; | |
20 | import java.lang.reflect.Proxy; | |
21 | import java.sql.CallableStatement; | |
22 | import java.sql.Connection; | |
23 | import java.sql.Driver; | |
24 | import java.sql.PreparedStatement; | |
25 | import java.sql.ResultSet; | |
26 | import java.sql.ResultSetMetaData; | |
27 | import java.sql.Statement; | |
28 | ||
29 | /** | |
30 | * Creates proxy implementations of JDBC interfaces. This avoids | |
31 | * incompatibilities between the JDBC 2 and JDBC 3 interfaces. This class is | |
32 | * thread safe. | |
33 | * | |
34 | * @see java.lang.reflect.Proxy | |
35 | * @see java.lang.reflect.InvocationHandler | |
36 | */ | |
37 | public class ProxyFactory { | |
38 | ||
39 | /** | |
40 | * Class[] for CallableStatement interface. | |
41 | */ | |
42 | 0 | private static final Class[] callableStatementClass = |
43 | 0 | new Class[] { CallableStatement.class }; |
44 | ||
45 | /** | |
46 | * Class[] for Connection interface. | |
47 | */ | |
48 | 0 | private static final Class[] connectionClass = |
49 | new Class[] { Connection.class }; | |
50 | ||
51 | /** | |
52 | * Class[] for Driver interface. | |
53 | */ | |
54 | 0 | private static final Class[] driverClass = new Class[] { Driver.class }; |
55 | ||
56 | /** | |
57 | * The Singleton instance of this class. | |
58 | */ | |
59 | 0 | private static final ProxyFactory instance = new ProxyFactory(); |
60 | ||
61 | /** | |
62 | * Class[] for ResultSetMetaData interface. | |
63 | */ | |
64 | 0 | private static final Class[] metaClass = |
65 | new Class[] { ResultSetMetaData.class }; | |
66 | ||
67 | /** | |
68 | * Class[] for PreparedStatement interface. | |
69 | */ | |
70 | 0 | private static final Class[] preparedStatementClass = |
71 | new Class[] { PreparedStatement.class }; | |
72 | ||
73 | /** | |
74 | * Class[] for ResultSet interface. | |
75 | */ | |
76 | 0 | private static final Class[] resultSetClass = |
77 | new Class[] { ResultSet.class }; | |
78 | ||
79 | /** | |
80 | * Class[] for Statement interface. | |
81 | */ | |
82 | 0 | private static final Class[] statementClass = |
83 | new Class[] { Statement.class }; | |
84 | ||
85 | /** | |
86 | * Returns the Singleton instance of this class. | |
87 | * | |
88 | * @return singleton instance | |
89 | */ | |
90 | public static ProxyFactory instance() { | |
91 | 0 | return instance; |
92 | } | |
93 | ||
94 | /** | |
95 | * Protected constructor for ProxyFactory subclasses to use. | |
96 | */ | |
97 | protected ProxyFactory() { | |
98 | 0 | super(); |
99 | 0 | } |
100 | ||
101 | /** | |
102 | * Creates a new proxy <code>CallableStatement</code> object. | |
103 | * @param handler The handler that intercepts/overrides method calls. | |
104 | * @return proxied CallableStatement | |
105 | */ | |
106 | public CallableStatement createCallableStatement(InvocationHandler handler) { | |
107 | 0 | return (CallableStatement) Proxy.newProxyInstance( |
108 | handler.getClass().getClassLoader(), | |
109 | callableStatementClass, | |
110 | handler); | |
111 | } | |
112 | ||
113 | /** | |
114 | * Creates a new proxy <code>Connection</code> object. | |
115 | * @param handler The handler that intercepts/overrides method calls. | |
116 | * @return proxied Connection | |
117 | */ | |
118 | public Connection createConnection(InvocationHandler handler) { | |
119 | 0 | return (Connection) Proxy.newProxyInstance( |
120 | handler.getClass().getClassLoader(), | |
121 | connectionClass, | |
122 | handler); | |
123 | } | |
124 | ||
125 | /** | |
126 | * Creates a new proxy <code>Driver</code> object. | |
127 | * @param handler The handler that intercepts/overrides method calls. | |
128 | * @return proxied Driver | |
129 | */ | |
130 | public Driver createDriver(InvocationHandler handler) { | |
131 | 0 | return (Driver) Proxy.newProxyInstance( |
132 | handler.getClass().getClassLoader(), | |
133 | driverClass, | |
134 | handler); | |
135 | } | |
136 | ||
137 | /** | |
138 | * Creates a new proxy <code>PreparedStatement</code> object. | |
139 | * @param handler The handler that intercepts/overrides method calls. | |
140 | * @return proxied PreparedStatement | |
141 | */ | |
142 | public PreparedStatement createPreparedStatement(InvocationHandler handler) { | |
143 | 0 | return (PreparedStatement) Proxy.newProxyInstance( |
144 | handler.getClass().getClassLoader(), | |
145 | preparedStatementClass, | |
146 | handler); | |
147 | } | |
148 | ||
149 | /** | |
150 | * Creates a new proxy <code>ResultSet</code> object. | |
151 | * @param handler The handler that intercepts/overrides method calls. | |
152 | * @return proxied ResultSet | |
153 | */ | |
154 | public ResultSet createResultSet(InvocationHandler handler) { | |
155 | 0 | return (ResultSet) Proxy.newProxyInstance( |
156 | handler.getClass().getClassLoader(), | |
157 | resultSetClass, | |
158 | handler); | |
159 | } | |
160 | ||
161 | /** | |
162 | * Creates a new proxy <code>ResultSetMetaData</code> object. | |
163 | * @param handler The handler that intercepts/overrides method calls. | |
164 | * @return proxied ResultSetMetaData | |
165 | */ | |
166 | public ResultSetMetaData createResultSetMetaData(InvocationHandler handler) { | |
167 | 0 | return (ResultSetMetaData) Proxy.newProxyInstance( |
168 | handler.getClass().getClassLoader(), | |
169 | metaClass, | |
170 | handler); | |
171 | } | |
172 | ||
173 | /** | |
174 | * Creates a new proxy <code>Statement</code> object. | |
175 | * @param handler The handler that intercepts/overrides method calls. | |
176 | * @return proxied Statement | |
177 | */ | |
178 | public Statement createStatement(InvocationHandler handler) { | |
179 | 0 | return (Statement) Proxy.newProxyInstance( |
180 | handler.getClass().getClassLoader(), | |
181 | statementClass, | |
182 | handler); | |
183 | } | |
184 | ||
185 | } |