Getting file (versionable) history using Server Java API

public static IChangeSet findVersionableStateChangeSet(IVersionableHandle version, IProjectAreaHandle projh, IRepositoryItemService rs, IScmService scms, IScmQueryService scmqs, IReportInfoCollector collector, String streamName) throws TeamRepositoryException
{
    IWorkspaceHandle wsh = getStreamWorkspaceHandle(streamName, projh, rs, scmqs, collector);
    
    IComponentHandle[] compHdls = scms.getComponentsContainingVersionable(wsh, version, null, null);
    
    ServiceHistoryProvider historyProvider = ServiceHistoryProvider.FACTORY.create(wsh, compHdls[0]);
    ChangeHistoryEntry[] historyEntries = scms.recentEntries(historyProvider, null, null);
    
    IChangeSet foundChangeSet = searchForVersionableChangeSetInHistory(version, rs, historyEntries);
    
    if (foundChangeSet != null)
        return foundChangeSet; // change set located
    ChangeHistoryHandle chHdl = scms.previousHistory(historyProvider, null, null);
    int loopCount = 0;
    while (chHdl != null && loopCount < 100 / infinite loop protection /)
    {
        historyProvider = ServiceHistoryProvider.FACTORY.create(chHdl);
        
        
        historyEntries = scms.recentEntries(historyProvider, null, null);
        
        foundChangeSet = searchForVersionableChangeSetInHistory(version, rs, historyEntries);
        
        if (foundChangeSet != null)
            return foundChangeSet;
    
        chHdl =scms.previousHistory(historyProvider, null, null);
        
        loopCount++;
    }
    return null; // no changeset with versionable found
}
    

private static IChangeSet searchForVersionableChangeSetInHistory(IVersionableHandle version, IRepositoryItemService rs, List<ChangeHistoryEntry> historyEntryList) throws TeamRepositoryException
{
    // looping all change-sets
    IChange change;
    IChangeSetHandle csh;
    IChangeSet cs;
    for (ChangeHistoryEntry changeEntry : historyEntryList)
    {
        csh = changeEntry.getChangeSet();
        cs = (IChangeSet) rs.fetchItem(csh, null);
        // looping all changes (files) in each change-set
        for (Object co : cs.changes())
        {
            change = (IChange) co;

            if (change.afterState() != null && change.afterState().getStateId().equals(version.getStateId()))
            {
                return cs;
            }
        }
    }
    return null; // no results found 
}