tree ce5e6f79059d186683b31411b594dc18e419b9a7
parent 4e9c37ca39df963f3f79c854cfdf3474a2f4cee1
author Yuta HIGUCHI <y-higuchi@onlab.us> 1411344089 -0700
committer Yuta HIGUCHI <y-higuchi@onlab.us> 1411367901 -0700

DefaultPort

- avoid null and use emptySet
- Copy given IpAddress Set to make this instance immutable

Change-Id: I55e8f6700ce2bc2883848c26947e6422bc72e1bc