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#!/usr/bin/env ruby
require 'zipf'
class RuleAndSpan
attr_accessor :span, :symbol, :source, :target, :subspans, :done, :id
def initialize s, id
spans, srcs, tgts = splitpipe s.strip
_,@symbol = spans.split
@span = _.split(",", 2).map { |i| i.gsub(/[<>]/, "").to_i}
@source = srcs.strip.split
j = 0
@source.map! { |i| if i.match(/\[X\]/) then "[#{j+=1}]" else i end }
@target = tgts.strip.split
@subspans = []
@done = false
@id = id
end
def to_s
return "#{@id}\t<#{@span.first},#{@span[1]}> [X] ||| #{@source.join " "} ||| #{@target.join " "}"
end
def is_terminal_rule?
@source.each { |w|
return true if !w.match(/\[S|(\d+)\]/)
}
return false
end
end
def conv_cdec_show_deriv s
a = s.split("}").map { |i|
i.gsub /^[()\s]*/, ""
}.reject { |i|
i.size==0 }.map { |i|
i.gsub /^\{/, ""
}
return a
end
def derive span, spans, by_span, o, groups, source
if groups.size==0 || groups.last.size>0
groups << []
end
a = nil
if source
a = span.source
else
a = span.target
end
a.each_with_index { |w,k|
nt = w.match /\[(\d+)\]/
if nt
idx = nt.captures.first.to_i-1
_ = derive by_span[span.subspans[idx]], spans, by_span, o, groups, source
(k+1).upto(a.size-1) { |i|
if !a[i].match(/\[(\d+)\]/) && groups.last.size>0
groups << []
end
}
else
groups.last << ["#{w}", span.id]
o << w
end
}
span.done = true
end
def proc_deriv s
a = conv_cdec_show_deriv s
by_span = {}
spans = []
id = 0
a.each { |line|
rs = RuleAndSpan.new line, id
id += 1
by_span[rs.span] = rs
if rs.is_terminal_rule?
spans << rs.span
end
}
spans.reverse.each_with_index { |s,k|
(spans.size-(k+2)).downto(0) { |l|
t = spans[l]
if s[0] >= t[0] and s[1] <= t[1]
by_span[t].subspans << s
break
end
}
}
# fix order
spans.each { |s|
by_span[s].subspans.reverse!
}
so = []
source_groups = []
spans.each { |span|
next if by_span[span].done
derive by_span[span], spans, by_span, so, source_groups, true
}
spans.each { |s| by_span[s].done = false }
o = []
groups = []
spans.each { |span|
next if by_span[span].done
derive by_span[span], spans, by_span, o, groups, false
}
source_rgroups = []
rgroups = []
source_groups.each { |i| source_rgroups << i.first[1] }
groups.each { |i| rgroups << i.first[1] }
phrase_align = []
source_rgroups.each { |i|
phrase_align << []
rgroups.each_with_index { |j,k|
if i==j
phrase_align.last << k
end
}
}
h = {}
h[:phrase_alignment] = phrase_align
h[:source_groups] = source_groups.map { |a| a.map { |i| i.first }.join " " }
h[:target_groups] = groups.map { |a| a.map { |i| i.first }.join " " }
return h.to_json
end
if __FILE__ == $0
json = proc_deriv(STDIN.gets.strip)
obj = JSON.parse(json)
STDERR.write "#{json}\n"
puts obj["target_groups"].join " "
end
|
