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Contents
module DmAdapterSimpledb
class ChunkedString < String
MAX_CHUNK_SIZE = 1019
def self.valid?(values)
values.all?{|v| v =~ /^\d{4}:/}
end
def initialize(string_or_array)
case string_or_array
when Array then super(chunks_to_string(string_or_array))
else super(string_or_array)
end
end
def to_ary
string_to_chunks(self)
end
alias_method :to_a, :to_ary
private
def string_to_chunks(value)
return [value] if value.size <= 1019
chunks = value.to_s.scan(%r/.{1,1019}/m) # 1024 - '1024:'.size
i = -1
fmt = '%04d:'
chunks.map!{|chunk| [(fmt % (i += 1)), chunk].join}
raise ArgumentError, 'that is just too big yo!' if chunks.size >= 256
chunks
end
def chunks_to_string(value)
begin
chunks =
Array(value).flatten.map do |chunk|
index, text = chunk.split(%r/:/, 2)
[Float(index).to_i, text]
end
chunks.replace chunks.sort_by{|index, text| index}
string_result = chunks.map!{|index, text| text}.join
string_result
rescue ArgumentError, TypeError
#return original value, they could have put strings in the system not
#using the adapter or previous versions that are larger than chunk size,
#but less than 1024
value.to_s
end
end
end
end
Version data entries
4 entries across 4 versions & 1 rubygems