barrier/lib/io/CInputStreamFilter.h

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#ifndef CINPUTSTREAMFILTER_H
#define CINPUTSTREAMFILTER_H
#include "IInputStream.h"
//! A filtering input stream
/*!
This class wraps an input stream. Subclasses provide indirect access
to the stream, typically performing some filtering.
*/
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class CInputStreamFilter : public IInputStream {
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public:
/*!
Create a wrapper around \c stream. Iff \c adoptStream is true then
this object takes ownership of the stream and will delete it in the
d'tor.
*/
CInputStreamFilter(IInputStream* stream, bool adoptStream = true);
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~CInputStreamFilter();
// IInputStream overrides
virtual void close() = 0;
virtual UInt32 read(void*, UInt32 n, double timeout) = 0;
virtual UInt32 getSize() const = 0;
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protected:
//! Get the stream
/*!
Returns the stream passed to the c'tor.
*/
IInputStream* getStream() const;
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private:
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IInputStream* m_stream;
bool m_adopted;
};
#endif