How to get changeset associated with particular baseline of component using RTC client api

Thank you in advance

I am working on task where I need to find out changesets present under particular baseline of component. I have used below two api for same

IChangeSetHandle[] com.ibm.team.scm.common.IScmService.changeSetsInBaseline(IBaselineHandle arg0, IChangeSetHandle[] arg1, IRepositoryProgressMonitorHandle arg2) throws TeamRepositoryException

workspaceManager.findChangeSets(changeSetSearchCriteria,  IWorkspaceManager.MAX_QUERY_SIZE, null);

where,

changeSetSearchCriteria  contains  following criteria

  changeSetSearchCriteria.setComponent(componentHandle);    

changeSetSearchCriteria.setContext(baseline);

but both method is not returning exact changeset. It returns all the changeset under that component

Please let me know how to read exact changeset under particular baseline of component