[LUCENE-2126] Split up IndexInput and IndexOutput into DataInput and DataOutput

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.0-ALPHA
• Fix Version/s: 4.0-ALPHA
• Lucene Fields: New, Patch Available
• Assignee: Michael Busch
• Reporter: Michael Busch
• Created: 07/Dec/09 09:20
• Updated: 28/Aug/22 12:16
• Resolved: 30/Mar/10 23:43

Description

I'd like to introduce the two new classes DataInput and DataOutput
that contain all methods from IndexInput and IndexOutput that actually
decode or encode data, such as readByte()/writeByte(),
readVInt()/writeVInt().

Methods like getFilePointer(), seek(), close(), etc., which are not
related to data encoding, but to files as input/output source stay in
IndexInput/IndexOutput.

This patch also changes ByteSliceReader/ByteSliceWriter to extend
DataInput/DataOutput. Previously ByteSliceReader implemented the
methods that stay in IndexInput by throwing RuntimeExceptions.

See also LUCENE-2125.

All tests pass.