blob: a2438cd4f9f3380241d5f88c416bdadd17d6b29b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
package utils;
/*
* This little app checks to see what version of JVM is being used.
* It does this by checking first the java.vm.version property, and
* if that fails, it looks for certain classes that should be present.
*/
public class CheckVersion
{
/*
* Check for the existence of a class by attempting to load it
*/
public static boolean checkClass(String c)
{
try
{
Class.forName(c);
}
catch (Exception e)
{
return false;
}
return true;
}
/*
* This first checks java.vm.version for 1.1, 1.2 or 1.3.
*
* It writes jdbc1 to stdout for the 1.1.x VM.
*
* For 1.2 or 1.3, it checks for the existence of the javax.sql.DataSource
* interface, and if found writes enterprise to stdout. If the interface
* is not found, it writes jdbc2 to stdout.
*
* PS: It also looks for the existence of java.lang.Byte which appeared in
* JDK1.1.0 incase java.vm.version is not heeded by some JVM's.
*
* If it can't work it out, it writes huho to stdout.
*
* The make file uses the written results to determine which rule to run.
*
* Bugs: This needs thorough testing.
*/
public static void main(String args[])
{
String vmversion = System.getProperty("java.vm.version");
System.out.println("postgresql.jdbc=" + System.getProperty("postgresql.jdbc"));
// We are running a 1.1 JVM
if (vmversion.startsWith("1.1"))
{
System.out.println("jdbc1");
//System.exit(0);
}
else
// We are running a 1.2 or 1.3 JVM
if (vmversion.startsWith("1.2") ||
vmversion.startsWith("1.3") ||
checkClass("java.lang.Byte")
)
{
// Check to see if we have the standard extensions. If so, then
// we want the enterprise edition, otherwise the jdbc2 driver.
if (checkClass("javax.sql.DataSource"))
System.out.println("enterprise");
else
System.out.println("jdbc2");
//System.exit(0);
}
System.setProperty("postgresql.jdbc", "yoyo");
}
}
|
