code refactor

pkg/converters/data_table.go

@@ -0,0 +1,37 @@
+package converters
+
+// ImportedDataTable defines the structure of imported data table
+type ImportedDataTable interface {
+	// DataRowCount returns the total count of data row
+	DataRowCount() int
+
+	// HeaderLineColumnNames returns the header column name list
+	HeaderLineColumnNames() []string
+
+	// DataRowIterator returns the iterator of data row
+	DataRowIterator() ImportedDataRowIterator
+}
+
+// ImportedDataRow defines the structure of imported data row
+type ImportedDataRow interface {
+	// ColumnCount returns the total count of column in this data row
+	ColumnCount() int
+
+	// GetData returns the data in the specified column index
+	GetData(columnIndex int) string
+}
+
+// ImportedDataRowIterator defines the structure of imported data row iterator
+type ImportedDataRowIterator interface {
+	// HasNext returns whether the iterator does not reach the end
+	HasNext() bool
+
+	// Next returns the next imported data row
+	Next() ImportedDataRow
+}
+
+// DataTableBuilder defines the structure of data table builder
+type DataTableBuilder interface {
+	// AppendTransaction appends the specified transaction to data builder
+	AppendTransaction(data map[DataTableColumn]string)
+}