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JRuby json conversion
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# test conversion of Java objects to json in JRuby | |
# jrjackson is the only gem doing it right, the others quote the result | |
# the trick for the other ones is to convert maps and lists to ruby hashes and arrays before | |
array = java.util.ArrayList.new().to_array | |
list = java.util.ArrayList.new() | |
map = java.util.HashMap.new() | |
nested = { :list => list } | |
require 'jrjackson' | |
puts "*** jrjackson" | |
puts "Array: " + JrJackson::Json.dump([]) | |
puts "Java Array: " + JrJackson::Json.dump(array) | |
puts "Java List to_a: " + JrJackson::Json.dump(list.to_a) | |
puts "Java List: " + JrJackson::Json.dump(list) | |
puts "Hash " + JrJackson::Json.dump({}) | |
puts "Java Map: " + JrJackson::Json.dump(map) | |
puts "Java Map to_hash: " + JrJackson::Json.dump(map.to_hash) | |
puts "Nested list: " + JrJackson::Json.dump(nested) | |
puts "Nested list to_hash: " + JrJackson::Json.dump(nested.to_hash) | |
require 'gson' | |
puts "\n*** Gson" | |
puts "Array: " + Gson::Encoder.new.encode([]) | |
puts "Java Array: " + Gson::Encoder.new.encode(array) | |
puts "Java List to_a: " + Gson::Encoder.new.encode(list.to_a) | |
puts "Java List: " + Gson::Encoder.new.encode(list) | |
puts "Hash " + Gson::Encoder.new.encode({}) | |
puts "Java Map: " + Gson::Encoder.new.encode(map) | |
puts "Java Map to_hash: " + Gson::Encoder.new.encode(map.to_hash) | |
puts "Nested list: " + Gson::Encoder.new.encode(nested) | |
puts "Nested list to_hash: " + Gson::Encoder.new.encode(nested.to_hash) | |
require 'json' | |
puts "\n*** json" | |
puts "Array: " + JSON.dump([]) | |
puts "Java Array: " + JSON.dump(array) | |
puts "Java List to_a: " + JSON.dump(list.to_a) | |
puts "Java List: " + JSON.dump(list) | |
puts "Hash " + JSON.dump({}) | |
puts "Java Map: " + JSON.dump(map) | |
puts "Java Map to_hash: " + JSON.dump(map.to_hash) | |
puts "Nested list: " + JSON.dump(nested) | |
puts "Nested list to_hash: " + JSON.dump(nested.to_hash) |
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$ rvm jruby-1.7.14 do ruby json.rb | |
*** jrjackson | |
Array: [] | |
Java Array: [Ljava.lang.Object;@21bcffb5 | |
Java List to_a: [] | |
Java List: [] | |
Hash {} | |
Java Map: {} | |
Java Map to_hash: {} | |
Nested list: {"list":[]} | |
Nested list to_hash: {"list":[]} | |
*** Gson | |
Array: [] | |
Java Array: "[Ljava.lang.Object;@21bcffb5" | |
Java List to_a: [] | |
Java List: "[]" | |
Hash {} | |
Java Map: "{}" | |
Java Map to_hash: {} | |
Nested list: {"list":"[]"} | |
Nested list to_hash: {"list":"[]"} | |
*** json | |
Array: [] | |
Java Array: "[Ljava.lang.Object;@21bcffb5" | |
Java List to_a: [] | |
Java List: "[]" | |
Hash {} | |
Java Map: "{}" | |
Java Map to_hash: {} | |
Nested list: {"list":"[]"} | |
Nested list to_hash: {"list":"[]"} |
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Is this problem only for dumping the string or there is another problem?