55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// eoFactory.h
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// (c) GeNeura Team, 1998
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//-----------------------------------------------------------------------------
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#ifndef _EOFACTORY_H
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#define _EOFACTORY_H
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//-----------------------------------------------------------------------------
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#include <eoObject.h>
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//-----------------------------------------------------------------------------
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/** EO Factory. A factory is used to create other objects. In particular,
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it can be used so that objects of that kind can´t be created in any other
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way. It should be instantiated with anything that needs a factory, like selectors
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or whatever; but the instance class should be the parent class from which all the
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object that are going to be created descend. This class basically defines an interface,
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as usual. The base factory class for each hierarchy should be redefined every time a new
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object is added to the hierarchy, which is not too good, but in any case, some code would
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have to be modified*/
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template<class EOClass>
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class eoFactory: public eoObject {
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public:
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/// @name ctors and dtors
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//{@
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/// constructor
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eoFactory( ) {}
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/// destructor
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virtual ~eoFactory() {}
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//@}
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/** Another factory methods: creates an object from an istream, reading from
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it whatever is needed to create the object. Usually, the format for the istream will be\\
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objectType parameter1 parameter2 ... parametern\\
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*/
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virtual EOClass* make(istream& _is) = 0;
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///@name eoObject methods
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//@{
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/** Return the class id */
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virtual string className() const { return "eoFactory"; }
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/** Read and print are left without implementation */
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//@}
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};
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#endif _EOFACTORY_H
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