Method: Origami::Stream#decode!

Defined in:
lib/origami/stream.rb

#decode! ⇒ Object

Uncompress the stream data.



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# File 'lib/origami/stream.rb', line 304

def decode!
    self.decrypt! if self.is_a?(Encryption::EncryptedStream)
    return if decoded?

    filters = self.filters

    if filters.empty?
        @data = @encoded_data.dup
        return
    end

    unless filters.all?{|filter| filter.is_a?(Name)}
        raise InvalidStreamObjectError, "Invalid Filter type parameter"
    end

    dparams = decode_params

    @data = @encoded_data.dup
    @data.freeze

    filters.each_with_index do |filter, layer|
        params = dparams[layer].is_a?(Dictionary) ? dparams[layer] : {}

        # Handle Crypt filters.
        if filter == :Crypt
            raise Filter::Error, "Crypt filter must be the first filter" unless layer.zero?

            # Skip the Crypt filter.
            next
        end

        begin
            @data = decode_data(@data, filter, params)
        rescue Filter::Error => error
            @data = error.decoded_data if error.decoded_data
            raise
        end
    end

    self
end