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Core::ExternalReadStream

Core::ExternalReadStream Class Reference

#include <ExternalReadStream.h>

Inheritance diagram for Core::ExternalReadStream:

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Collaboration diagram for Core::ExternalReadStream:

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List of all members.

Public Member Functions

 ExternalReadStream (IOAccessor *accessor)
virtual String * className (void) const
 Answer receiver class name.
virtual void flush (void)
virtual Object * next (void)
virtual SequenceableCollection * next (long items)
virtual void nextPut (Object *object)
virtual void nextPut (const char object)
virtual void skip (long length)
virtual bool isReadable (void)
virtual bool isWritable (void)

Constructor & Destructor Documentation

ExternalReadStream::ExternalReadStream (  IOAccessor *  accessor  ) 
 

Definition at line 31 of file ExternalReadStream.cc.

00032   : ExternalStream(accessor)
00033 {
00034     /* Does nothing */
00035 }

Member Function Documentation

String * ExternalReadStream::className (  void   )  const [virtual]
 

Answer receiver class name.

Because there isn't any standard way to obtain class name this method comes to place.

Every class should rewrite this method but many didn't (yet).

Reimplemented from Core::ExternalStream.

Reimplemented in Core::ExternalReadAppendStream.

Definition at line 38 of file ExternalReadStream.cc.

00039 {
00040     return new String("ExternalReadStream");
00041 }

void ExternalReadStream::flush (  void   )  [virtual]
 

Reimplemented from Core::Stream.

Reimplemented in Core::ExternalReadAppendStream.

Definition at line 44 of file ExternalReadStream.cc.

00045 {
00046     /* Does nothing */
00047 }

bool ExternalReadStream::isReadable (  void   )  [virtual]
 

Reimplemented from Core::Stream.

Definition at line 90 of file ExternalReadStream.cc.

00091 {
00092     return true;
00093 }

bool ExternalReadStream::isWritable (  void   )  [virtual]
 

Reimplemented from Core::Stream.

Reimplemented in Core::ExternalReadAppendStream.

Definition at line 95 of file ExternalReadStream.cc.

00096 {
00097     return false;
00098 }

virtual SequenceableCollection* Core::ExternalReadStream::next (  long  items  )  [inline, virtual]
 

Reimplemented from Core::PositionableStream.

Definition at line 45 of file ExternalReadStream.h.

References Core::PositionableStream::next().

00046       { return ExternalStream::next(items); }

Object * ExternalReadStream::next (  void   )  [virtual]
 

Reimplemented from Core::PositionableStream.

Definition at line 49 of file ExternalReadStream.cc.

References Core::PositionableStream::_position, Core::SequenceableCollection::at(), Core::PositionableStream::collection, nil, Core::ExternalStream::pastEnd(), and Core::PositionableStream::read_limit.

Referenced by skip().

00050 {
00051     Object *ch;
00052 
00053     if (_position >= read_limit) {
00054         ch = pastEnd();
00055         if (ch == nil) return nil;
00056     } else {
00057         ch = collection->at(_position++);
00058     }
00059     return ch;
00060 }

virtual void Core::ExternalReadStream::nextPut (  const char  object  )  [inline, virtual]
 

Reimplemented from Core::Stream.

Reimplemented in Core::ExternalReadAppendStream.

Definition at line 48 of file ExternalReadStream.h.

References Core::Stream::nextPut().

00049       { ExternalStream::nextPut(object); }

void ExternalReadStream::nextPut (  Object *  object  )  [virtual]
 

Reimplemented from Core::Stream.

Reimplemented in Core::ExternalReadAppendStream.

Definition at line 62 of file ExternalReadStream.cc.

References Core::Object::shouldNotImplement().

00063 {
00064     shouldNotImplement(new String(__PRETTY_FUNCTION__));
00065 }

void ExternalReadStream::skip (  long  length  )  [virtual]
 

Reimplemented from Core::PositionableStream.

Definition at line 68 of file ExternalReadStream.cc.

References Core::PositionableStream::_position, Core::ExternalStream::io_buffer, Core::IOBuffer::isSeekable(), next(), Core::PositionableStream::read_limit, Core::ExternalStream::readPosition(), and Core::ExternalStream::setPosition().

00069 {
00070     long pos;
00071 
00072     pos = _position + n;
00073     if (pos >= 0 && pos <= read_limit)
00074         _position = pos;
00075     else {
00076         if (io_buffer->isSeekable())
00077             setPosition(readPosition() + n);
00078         else {
00079             if (n > 0) next(n);
00080             else {
00081                 /* Cannot move back on unseekable stream.
00082                    May raise an exception here.
00083                  */
00084             }
00085         }
00086     }
00087 }

The documentation for this class was generated from the following files:
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