Determining when a change set was delivered to a workspace or stream and by whom

A computer program product comprising a computer readable storage medium having program code stored thereon, the program code executable by a processor to perform a method comprising:

• storing, by the processor, to a functional data structure a plurality of events associated with a workspace or stream, each of the plurality of events comprising at least an indication of when an operation in the workspace or stream occurred and who performed the operation;
• identifying, by the processor, a change set that is of interest to be analyzed to determine whether a node representing the change set that is of interest is included in a set of nodes of a change set history tree corresponding to a subject event and which are not present in a set of nodes of the change set history tree corresponding to a previous event, each node representing a change set delivered to the workspace or stream, wherein the change set that is of interest is incorporated into the workspace or stream responsive to a user input performing an operation to move a pointer of the workspace or stream from a first node of the version tree to a second node of the version tree;
• identifying, by the processor, a particular event stored in the functional data structure as a subject event;
• identifying, by the processor, a particular event stored in the functional data structure, which precedes the subject event, as a previous event;
• identifying, by the processor, the set of nodes of a change set history tree corresponding to the subject event which are not present in the set of nodes of a change set history tree corresponding to the previous event, and determining whether the set of nodes corresponding to the subject event, which are not present in the set of nodes of the change set history tree corresponding to the previous event, includes the node representing the change set that is of interest;
• responsive to determining, by the processor, that the change set of interest is not included in the set of nodes corresponding to the subject event, until a set of nodes including the change set of interest is identified, recursively:
• re-identifying, by the processor, as the subject event the event currently identified as the previous event and identifying, by the processor, as the previous event a particular event stored in the functional data structure that precedes the re-identified subject event;
• and
• identifying, by the processor, a corresponding set of nodes of the change set history tree corresponding to the subject event which are not present in the set of nodes of a change set history tree corresponding to the previous event, and determining, by the processor, whether the set of nodes corresponding to the subject event, which are not present in the set of nodes of the change set history tree corresponding to the previous event, includes a node representing the change set that is of interest;
• and
• responsive to determining that the corresponding set of nodes includes the node representing the change set that is of interest, identifying, by the processor, the subject event as an event that added the change set of interest to the workspace or stream and retrieving, by the processor, from the subject event an indication of when the user input performing the operation to move the pointer of the workspace or stream from the first node of the version tree to the second node of the version tree occurred and who performed the operation to move the pointer of the workspace or stream from the first node of the version tree to the second node of the version tree;
• and
• outputting, by the processor, the indication of when the user input performing the operation to move the pointer of the workspace or stream from the first node of the version tree to the second node of the version tree occurred and who entered the user input performing the operation to move the pointer of the workspace or stream from the first node of the version tree to the second node of the version tree.