Convert String to Ruby byte array when using Hbase Shell

Question

I want to convert a String to a Ruby byte array. I have a String and saving it in Hbase as binary byte array. Need to scan with some filter on key which is a binary byte array. Have a String like "U92w8GSBJ2BiHzGg" and need its representation like "\xFF\xA4\xDD\x13\x003\xE4\x85\xC7\x9D\xD5ZY\xF0\x1E" so that I can make query on Hbase shell like below

hbase(main):005:0> scan 't1', {FILTER => "(PrefixFilter ('\xFF\xA4\xDD\x13\x003\xE4')"}

Thanks in advance

Possible duplicate of How to convert string to bytes in Ruby? — anothermh
– anothermh, Commented Apr 17, 2018 at 22:08

kares · Accepted Answer · 2018-05-13 18:20:01Z

1

I want to convert a String to a Ruby byte array.

will assume you mean: "want to convert a Ruby String to a Java byte array"

simply use 'a_ruby_binary_string'.to_java_bytes (returns byte[] under JRuby)

answered May 13, 2018 at 18:20

kares

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balster neb · Accepted Answer · 2018-07-18 05:36:52Z

0

The correct way to do it is to use double quotes for JRuby byte strings. For example:

"\xFF\xA4\xDD\x13\x003\xE4"

(I know this reply is late, but I had the same problem and stumbled upon this solution)

answered Jul 18, 2018 at 5:36

balster neb

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1 Comment

Oleg Muravskiy Over a year ago

1. This works in other places in hbase shell (STARTROW, for example), but but in filter parameter it results in TypeError: cannot convert instance of class org.jruby.RubyString to class [B 2. This does not really answer the question, as for the string "U92w8GSBJ2BiHzGg" you first need to figure out yourself what the corresponding bytes are

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