eo/src/eoFactory.h

@@ -0,0 +1,55 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// eoFactory.h
+// (c) GeNeura Team, 1998
+//-----------------------------------------------------------------------------
+
+#ifndef _EOFACTORY_H
+#define _EOFACTORY_H
+
+//-----------------------------------------------------------------------------
+#include <eoObject.h>
+
+//-----------------------------------------------------------------------------
+
+/** EO Factory. A factory is used to create other objects. In particular,
+it can be used so that objects of that kind can´t be created in any other
+way. It should be instantiated with anything that needs a factory, like selectors
+or whatever; but the instance class should be the parent class from which all the
+object that are going to be created descend. This class basically defines an interface,
+as usual. The base factory class for each hierarchy should be redefined every time a new
+object is added to the hierarchy, which is not too good, but in any case, some code would
+have to be modified*/
+template<class EOClass>
+class eoFactory: public eoObject {
+	
+public:
+	
+	/// @name ctors and dtors
+	//{@
+	/// constructor
+	eoFactory( ) {}
+	
+	/// destructor
+	virtual ~eoFactory() {}
+	//@}
+
+	/** Another factory methods: creates an object from an istream, reading from
+	it whatever is needed to create the object. Usually, the format for the istream will be\\
+	objectType parameter1 parameter2 ... parametern\\
+	*/
+	virtual EOClass* make(istream& _is) = 0;
+
+	///@name eoObject methods
+	//@{
+	/** Return the class id */
+	virtual string className() const { return "eoFactory"; }
+
+	/** Read and print are left without implementation */
+	//@}
+	
+};
+
+
+#endif _EOFACTORY_H