try:
    import ujson as json
except ImportError:
    import json


class JsonBuilder:
    def build_bom(self, rows):
        data = []
        headers = ['itemId', 'description', 'quantity']
        for row in rows:
            d = {}
            for i, value in enumerate(row):
                d[headers[i]] = value
            data.append(d)
        return data

    def bom_to_json(self, data):
        return json.dumps(data)

    def build_bom_output(self, rows):
        return self.bom_to_json(self.build_bom(rows))