Using XML with Legacy Business Applications

DataCellX12R Class (Extends DataCellReal)

As noted above, this class is derived from the DataCellReal class developed in Chapter 8. It uses that class's toXML method but provides its own fromXML and prepareOutput methods.

Logic for the DataCellX12R fromXML Method

Arguments: None Returns: Error status or throws exception Trim Spaces IF Cell Buffer = -0, INF, -INF, or NaN Return error for unsupported constant in X12 Decimal date type ENDIF Convert to uppercase since XML schema language data types allow a lower case 'e' to indicate the exponent IF first Character in Cell Buffer = "+" Cell Buffer <- Shift Cell Buffer left one character to remove plus sign Decrement Buffer Length ENDIF Return success

Logic for the DataCellX12R prepareOutput Method ...