Hi,
I raised this on stackoverflow - but wondering if its perhaps a jruby
bug (or feature)
I have a Java HashMap that I have in JRuby, I am trying to convert it to
JSON, but its not converting correctly, I think this example shows the
problem:
$ irb
irb(main):001:0> require 'java'
=> false
irb(main):003:0> require 'json'
=> true
irb(main):005:0> h = java.util.HashMap.new()
=> {}
irb(main):006:0> x = {}
=> {}
irb(main):007:0> JSON.parse JSON.dump x
=> {}
irb(main):008:0> JSON.parse JSON.dump h
JSON::ParserError: unexpected token at '"{}"'
from json/ext/Parser.java:251:in `parse'
from
/Users/kimptoc/.rvm/rubies/jruby-1.7.3/lib/ruby/1.9/json/common.rb:155:in
parse' from (irb):9:in evaluate’
from org/jruby/RubyKernel.java:1066:in eval' from org/jruby/RubyKernel.java:1409:in loop’
from org/jruby/RubyKernel.java:1174:in catch' from org/jruby/RubyKernel.java:1174:in catch’
from /Users/kimptoc/.rvm/rubies/jruby-1.7.3/bin/irb:13:in
`(root)’
irb(main):010:0> JSON.dump h
=> “"{}"”
Any ideas on how to handle this - do I need to turn the map into a Ruby
map?
There are some more subtleties around this too
-
The map is actually a synchronizedMap, which Jruby doesnt seem to
think is a Hash - so currently I wrap it in a HashMap to make it more
Jruby friendly
-
Sub maps also have the issue (perhaps obviously, I guess)
Should I raise a bug, or is this one of those, thats how it is features
Thanks,
Chris
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