Examples of org.apache.directory.server.xdbm.Index.drop()

• org.apache.directory.server.xdbm.Index.drop()
  Remove all the reference to an entry from the index.
  As an entry might be referenced more than once in the forward index, depending on which index we are dealing with, we need to iterate over all the values contained into the reverse index for this entryId.
  For instance, considering the ObjectClass index for an entry having three ObjectClasses (top, person, inetOrgPerson), then the reverse index will contain :

   [entryId, [top, person, inetOrgPerson]] 

  and the forward index will contain many entries like :

   [top, [..., entryId, ...]] [person,  [..., entryId, ...]] [inetOrgPerson,  [..., entryId, ...]] 

  So dropping the entryId means that we must first get all the values from the reverse index (and we will get [top, person, inetOrgPerson]) then to iterate through all those values to remove entryId from the associated list of entryIds. @param entryId The master table entry ID to remove @throws Exception