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1
6 package org.logicalcobwebs.proxool;
7
8 import org.apache.commons.logging.Log;
9 import org.apache.commons.logging.LogFactory;
10
11 import org.logicalcobwebs.cglib.proxy.MethodInterceptor;
12 import org.logicalcobwebs.cglib.proxy.MethodProxy;
13
14 import java.lang.reflect.InvocationTargetException  ;
15 import java.lang.reflect.Method ;
16 import java.sql.Connection ;
17 import java.sql.DatabaseMetaData ;
18
19
26 class ProxyDatabaseMetaData implements MethodInterceptor {
27
28 private static final Log LOG = LogFactory.getLog(ProxyDatabaseMetaData.class);
29
30 private static final String GET_CONNECTION_METHOD = "getConnection";
31
32 private static final String EQUALS_METHOD = "equals";
33
34 private static final String FINALIZE_METHOD = "finalize";
35
36 private DatabaseMetaData databaseMetaData;
37
38 private Connection wrappedConnection;
39
40
44 public ProxyDatabaseMetaData(DatabaseMetaData databaseMetaData, Connection wrappedConnection) {
45 this.databaseMetaData = databaseMetaData;
46 this.wrappedConnection = wrappedConnection;
47 }
48
49 public Object intercept(Object proxy, Method method, Object [] args, MethodProxy methodProxy) throws Throwable {
50 Object result = null;
51 int argCount = args != null ? args.length : 0;
52 try {
53 if (method.getName().equals(GET_CONNECTION_METHOD)) {
54 result = getConnection();
55 } else if (method.getName().equals(EQUALS_METHOD) && argCount == 1) {
56 result = new Boolean (equals(args[0]));
57 } else if (method.getName().equals(FINALIZE_METHOD)) {
58 super.finalize();
59 } else {
60 result = method.invoke(getDatabaseMetaData(), args);
61 }
62 } catch (InvocationTargetException e) {
63 throw e.getTargetException();
64 } catch (Exception e) {
65 LOG.error("Unexpected invocation exception", e);
66 throw new RuntimeException ("Unexpected invocation exception: "
67 + e.getMessage());
68 }
69
70 return result;
71 }
72
73
79 public boolean equals(Object obj) {
80 return databaseMetaData.hashCode() == obj.hashCode();
81 }
82
83
89 public Connection getConnection() {
90 return wrappedConnection;
91 }
92
93
97 protected DatabaseMetaData getDatabaseMetaData() {
98 return databaseMetaData;
99 }
100
101
104 public String toString() {
105 return databaseMetaData.toString();
106 }
107
108 }
109
110
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