[STORM-2072] Add map, flatMap with different outputs (T->V) in Trident

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0, 1.1.0
• Component/s: storm-core
• Assignee: Jungtaek Lim
• Reporter: Jungtaek Lim
• Created: 31/Aug/16 03:47
• Updated: 25/Oct/16 15:30
• Resolved: 25/Oct/16 15:30

Description

In STORM-1505 we introduced map, flatMap, filter to Trident which are more familiar than what Trident originally had (users had to use each and project to do the similar thing).

Current version of map and flatMap assume next output fields are same to current output fields, in other words, supporting only T -> T conversion. But in many situations we need to have T -> V conversion.

This issue adds T -> V conversion (via method overloading) to both map and flatMap.

Issue Links

• links to: GitHub Pull Request #1663