JRecord JRecord provides code to read and write files of length-based records.
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read write read length-based records write length-based records length fields records JRecord

JRecord Description

JRecord provides code to read and write files of length-based records. 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 neededFile 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.ExamplesReading a FileThis 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: } What's New in This Release: Version 0.68 is mainly about improving Cobol Support. Changes include: · Support for Open Cobol (Standard, Micro Focus Compatible, MVS, BS2000) and improved Fujitsu support. Mainframe Support is present as always. The Open Cobol (Microfocus mode) should work for Microfocus Cobol. · Improved Cobol Support - Sync supported, Comp-1, Comp-2 (Non-Mainframe Cobols) + other minor fixes · New File copy Utility. · Support for Open Cobol VB files. · Support for Hex CSV files (i.e. using a field seperator like x'FF') · Also included are changes related to the RecordEditor and FFReport projects

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