LoadFile.java

public class LoadFile extends Action {

    static final String PATH_PARAM = "Path";
    static final String ROW_SUCCESS = "SUCCESS";
    static final String ROW_FAIL = "FAIL";
    static final String ROW_UNCHECKED = "UNCHECKED";
    static final String ROW_STATUS = "IS_CHECKED";
    static final String DATA_TABLE = "data";

    public static String getValueByParam(String param, LinkedHashMap<String, String> inputParams) throws ResultException {
        InputParamsHandler handler = new InputParamsHandler(inputParams);
        String path;

        try {
            path = handler.getRequiredString(param);
        } finally {
            handler.check();
        }

        return path;
    }

    private ArrayList<Map<String, String>> getTableFromFile(CsvReader cr) throws IOException {
        ArrayList<Map<String, String>> table = new ArrayList<>();

        cr.readHeaders();
        String[] headers = cr.getHeaders();

        while (cr.readRecord()) {
            Map<String, String> row = new HashMap<>();

            for (int i = 0; i < headers.length; i++) {
                row.put(headers[i], cr.get(i));
            }

            row.put(ROW_STATUS, ROW_UNCHECKED);
            table.add(row);
        }

        return table;
    }

    @Override
    protected Result run(StepContext stepContext, MatrixContext matrixContext, GlobalContext globalContext) {
        String path;
        try {
            path = getValueByParam(PATH_PARAM, inputParams);
        } catch (ResultException e) {
            return DefaultResult.failedWithException(e);
        }

        CsvReader cr;
        try {
            cr = new CsvReader(new FileReader(new File(path)));
        } catch (FileNotFoundException e) {
            return DefaultResult.failedWithComment(String.format("File by path \"%s\" was not found", path));
        }

        ArrayList<Map<String, String>> table;
        try {
            table = getTableFromFile(cr);
        } catch (IOException e) {
            return DefaultResult.failedWithException(e);
        }
        finally {
            if (cr != null) {
                cr.close();
            }
        }

        matrixContext.setContext(DATA_TABLE, table);

        return null;
    }
}