JRecord 0.68.2

JRecord project provides code to:

- Read and write files of length based records (both fixed length records and Length field based records).
- Read and Write native cobol files.

Issues

- Code was written to support the RecordEditor not for reading Cobol Files.
- Data is returned as a String.
- Better Generic Cobol is needed

File Formats

- Length based files have 2 advantages over typical unix/windows text files:
- When reading, you do not need to check every byte in the file for a < CR >.
- Ideal for storing binary data - Saves the conversion cost (in 3rd generation languages like C and Cobol).

Formats Currently Supported

- Fixed Record Length (ie every record is the same fixed length.
- Mainframe VB (was also used on other computers as well).
- Mainframe VB Dump (sames as VB but also including the the Block Discriptor Word).
- Fujitsu Cobol VB format.

Examples

Reading a File

This example shows how a ByteReader is Read a Fujitsu-Cobol variable length file as a array of Bytes.

Note: Each line in these files consist of

4 byte Record descriptor (2 byte length in little endian binary format, 2 bytes check data).

Line Data

4 byte Record descriptor. Having the Record descriptor at the start and end of a record allows you to read forward and backwards in the file.

1: AbstractByteReader tReader = new FujitsuVbByteReader();
2: byte[] line;
3:
4: try {
5: tReader.open(fileName);
6:
7: while ((line = tReader.read()) != null) {
8: // TODO Do Something .....
9: }
10: } finally {
11: tReader.close();
12: }


Product's homepage

What's New in This Release: [ read full changelog ]

· This version fulfills a couple of user requests.
· There is an option for having column names in quotes for CSV files, and an enhanced copy utility.