NAME

Atlas::Filter - Atlas stream filter.

SYNOPSIS


#include <Filter.h>

Inherited by Atlas::Filters::Bzip2, and Atlas::Filters::Gzip.

Public Types


enum Type { CHECKSUM, COMPRESSION, ENCRYPTION }

Public Member Functions


Filter (Filter *=0)

virtual void begin ()=0

virtual void end ()=0

virtual std::string encode (const std::string &)=0

virtual std::string decode (const std::string &)=0

Protected Attributes


Filter * m_next

Detailed Description

Atlas stream filter.

Filters are used by Codec to transform the byte stream before transmission. The transform must be invertible; that is to say, encoding a string and then decoding it must result in the original string. Filters can be used for compression, encryption or performing checksums and other forms of transmission error detection. A compound filter can be created that acts like a single filter, allowing various filters to be chained together in useful ways such as compressing and then encrypting.

See also:

Codec

Negotiate

Author

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