List of deliveries in an RTC instance

I don't know if you can get 'delivery', but you can get changesets, and then you wil have to ripple thru them.
and IChangeHistory  has  methods to get specific history records.
documented in the javadoc

---

findChangeSets

java.util.List findChangeSets(IChangeSetSearchCriteria criteria,
                              int maxResults,
                              org.eclipse.core.runtime.IProgressMonitor monitor)
                              throws TeamRepositoryException

Search the repository for changesets matching the specified criteria and return the matched changesets.

Parameters:

criteria - The criteria to look for, must not be null.

maxResults - The maximum number of results to return, must be >0, if larger than IWorkspaceManager.MAX_QUERY_SIZE , only IWorkspaceManager.MAX_QUERY_SIZE results will be returned.

monitor - a progress monitor, or null if progress reporting is not desired

Returns:

The list of changeset handles maching the criteria, never null. Ordered by modified date, most recent first.

Throws:

NotLoggedInException - if the operation fails because the client was not logged in to the repository

org.eclipse.core.runtime.OperationCanceledException - if the operation is canceled. Cancellation can occur even if no progress monitor is provided.

TeamRepositoryException - if the operation fails for any other reason