What is the difference between DistributedCache.getCacheFiles() and DistributedCache.getLocalCacheFiles()

Question

What I understood is

DistributedCache.getCacheFiles() in distributed mode and DistributedCache.getLocalCacheFiles() in pseudo-distributed mode.

So can we check if we are running in pseudomode or distributed mode in our MapReduce code

if(distributed)
 DistributedCache.getCacheFiles()
else
 DistributedCache.getLocalCacheFiles()

Can we do something like this or is there a better way.

And DistributedCache can take both HDFS or local data eventhough we are using DistributedCache.getCacheFiles() and DistributedCache.getLocalCacheFiles() in relative modes.