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# File 'lib/embulk/guess/csv.rb', line 35
def guess_lines(config, sample_lines)
return {} unless config.fetch("parser", {}).fetch("type", "csv") == "csv"
parser_config = config["parser"] || {}
if parser_config["type"] == "csv" && parser_config["delimiter"]
delim = parser_config["delimiter"]
else
delim = guess_delimiter(sample_lines)
unless delim
return {}
end
end
parser_guessed = DataSource.new.merge(parser_config).merge({"type" => "csv", "delimiter" => delim})
unless parser_guessed.has_key?("quote")
quote = guess_quote(sample_lines, delim)
unless quote
if !guess_force_no_quote(sample_lines, delim, '"')
quote = '"'
else
end
end
parser_guessed["quote"] = quote
end
parser_guessed["quote"] = '"' if parser_guessed["quote"] == ''
unless parser_guessed.has_key?("escape")
if quote = parser_guessed["quote"]
escape = guess_escape(sample_lines, delim, quote)
unless escape
if quote == '"'
escape = '"'
else
end
end
parser_guessed["escape"] = escape
else
end
end
unless parser_guessed.has_key?("null_string")
null_string = guess_null_string(sample_lines, delim)
parser_guessed["null_string"] = null_string if null_string
end
sample_records = split_lines(parser_guessed, false, sample_lines, delim, {})
= (sample_records)
sample_lines = sample_lines[..-1]
sample_records = sample_records[..-1]
unless parser_guessed.has_key?("comment_line_marker")
, sample_lines =
(sample_lines, delim, parser_guessed["quote"], parser_guessed["null_string"])
if
parser_guessed["comment_line_marker"] =
end
end
sample_records = split_lines(parser_guessed, true, sample_lines, delim, {})
first_types = SchemaGuess.types_from_array_records(sample_records[0, 1])
other_types = SchemaGuess.types_from_array_records(sample_records[1..-1] || [])
if first_types.size <= 1 || other_types.size <= 1
return {}
end
unless parser_guessed.has_key?("trim_if_not_quoted")
sample_records_trimmed = split_lines(parser_guessed, true, sample_lines, delim, {"trim_if_not_quoted" => true})
other_types_trimmed = SchemaGuess.types_from_array_records(sample_records_trimmed[1..-1] || [])
if other_types != other_types_trimmed
parser_guessed["trim_if_not_quoted"] = true
other_types = other_types_trimmed
else
parser_guessed["trim_if_not_quoted"] = false
end
end
= (first_types != other_types && first_types.all? {|t| ["string", "boolean"].include?(t) }) || (sample_records)
if
parser_guessed["skip_header_lines"] = + 1
else
parser_guessed["skip_header_lines"] =
end
parser_guessed["allow_extra_columns"] = false unless parser_guessed.has_key?("allow_extra_columns")
parser_guessed["allow_optional_columns"] = false unless parser_guessed.has_key?("allow_optional_columns")
if
column_names = sample_records.first
else
column_names = (0..other_types.size).to_a.map {|i| "c#{i}" }
end
schema = []
column_names.zip(other_types).each do |name,type|
if name && type
if type.is_a?(SchemaGuess::TimestampTypeMatch)
schema << {"name" => name, "type" => type, "format" => type.format}
else
schema << {"name" => name, "type" => type}
end
end
end
parser_guessed["columns"] = schema
return {"parser" => parser_guessed}
end
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