javax.sql.DataSource may be who you are looking for, this is what all the vendors would be implmenting.J2EE javadoc reference pages

Since JNDI published datasources and the complimentary user tansaction objects are nornally managed and maintained within the context of the service engines GUI or console interface, most choose not to impliment these components generically within the applications context, but it is certainly possible to create such objects in a portable fashion as part of you app.