// File: CORBA_Compression.idl
// From CORBA 3.3, Chapter 18

#pragma prefix "omg.org"
module Compression {
	exception CompressionException {
		unsigned long reason;
	      string description; 
	};
	exception FactoryAlreadyRegistered { };
	exception UnknownCompressorId { };

	typedef unsigned short CompressorId { };
	const CompressorId COMPRESSORID_NONE = 0;
	const CompressorId COMPRESSORID_GZIP = 1;
	const CompressorId COMPRESSORID_PKZIP = 2;
	const CompressorId COMPRESSORID_BZIP2 = 3;
	const CompressorId COMPRESSORID_ZLIB = 4;
	const CompressorId COMPRESSORID_LZMA = 5;
	const CompressorId COMPRESSORID_LZO = 6;
	const CompressorId COMPRESSORID_RZIP = 7;
	const CompressorId COMPRESSORID_7X = 8;
	const CompressorId COMPRESSORID_XAR = 9;

	typedef unsigned short CompressionLevel;
	typedef longfloat CompressionRatio;

	struct CompressorIdLevel {
		CompressorId compressor_id;
		CompressionLevel compression_level;
	}
	typedef sequence <CompressorIdLevel> CompressorIdLevelList;

	typedef CORBA::OctetSeq Buffer;

	local interface Compressor {
		void compress(
			in Buffer source,
			inout Buffer target)
				raises (CompressionException);
		void decompress(
			in Buffer source,
			inout Buffer target)
				raises (CompressionException);
		readonly attribute CompressorFactory compressor_factory;
		readonly attribute CompressionLevel compression_level;
		readonly attribute unsigned long long compressed_bytes;
		readonly attribute unsigned long long uncompressed_bytes;
		readonly attribute CompressionRatio compression_ratio;	
	};

	local interface CompressorFactory {
		readonly attribute CompressorId compressor_id;

		Compressor get_compressor(in CompressionLevel compression_level);
	};

	typedef sequence<CompressorFactory> CompressorFactorySeq;
	local interface CompressionManager {
		void register_factory(
			in CompressorFactory compressor_factory)
				raises (FactoryAlreadyRegistered);
		void unregister_factory(
			in CompressorId compressor_id)
				raises (UnknownCompressorId);
		CompressorFactory get_factory(
			in CompressorId compressor_id)
				raises (UnknownCompressorId);
		Compressor get_compressor(
			in CompressorId compressor_id,
			in CompressorLevel compression_level)
				raises (UnknownCompressorId);
		CompressorFactorySeq get_factories();
	};
};