Reduce memory footprint by quasi-interning allowed barcodes

[alecw]

No description provided.

[kshakir]

I am not familiar with the JVM/caching tricks going on here within StringInterner but I don't think this will have a negative impact so: LGTM

[kshakir]

Note to my future self: Multiple instances of Strings will still be equal to each other. Thus for each candidate equal to an existing key in the map, the existing quasi-interned value will be returned instead of the original candidate. Neat.

I am not familiar with the JVM/caching tricks going on here within StringInterner but I don't think this will have a negative impact so: LGTM

Note to my future self: Multiple instances of Strings will still be equal to each other. Thus for each candidate equal to an existing key in the map, the existing quasi-interned value will be returned instead of the original candidate. Neat.