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Thread: Class Cast Exception for DataSource

Class Cast Exception for DataSource

From
"Raghavendra MB"
Date:
Hi,
 
I am using Postgres 8.2 version database and postgresql-8.2-504.jdbc3.jar  driver.
 
Snippet of code:
 

String postgresDataSource = "org.postgresql.Driver";

Class dataSourceClass = Class.forName(postgresDataSource);

dataSource = (DataSource) dataSourceClass.newInstance();

 

I am getting ClassCast exception when i try to run the code in my java application.

Please resolve this problem.

 

regards

Raghu

 

 

Re: Class Cast Exception for DataSource

From
Heikki Linnakangas
Date:
Raghavendra MB wrote:
> *String postgresDataSource = **"org.postgresql.Driver"**;*
>
> **
>
> *Class dataSourceClass = Class.forName(postgresDataSource);*
>
> *dataSource = (DataSource) dataSourceClass.newInstance();*
>
> **
>
> *I am getting *ClassCast exception when i try to run the code in my java
> application.
>
> Please resolve this problem.

org.postgresql.Driver doesn't implement the javax.sql.DataSource interface.

If you want a DataSource, just use "new
org.postgresql.ds.PGSimpleDataSource()" or "new
org.postgresql.ds.PGPoolingDataSource()" if you want pooling.

If you don't want to use a DataSource, you should be doing:

Class.forName("org.postgresql.Driver");
Connection conn = DriverManager.getConnection("jdbc:postgresql:....");

--
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com