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66 lines
2.6 KiB
Plaintext
Executable File
66 lines
2.6 KiB
Plaintext
Executable File
// Copyright (c) 1999-2012 OPEN CASCADE SAS
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//
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// The content of this file is subject to the Open CASCADE Technology Public
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// License Version 6.5 (the "License"). You may not use the content of this file
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// except in compliance with the License. Please obtain a copy of the License
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// at http://www.opencascade.org and read it completely before using this file.
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//
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// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
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// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
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//
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// The Original Code and all software distributed under the License is
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// distributed on an "AS IS" basis, without warranty of any kind, and the
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// Initial Developer hereby disclaims all such warranties, including without
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// limitation, any warranties of merchantability, fitness for a particular
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// purpose or non-infringement. Please see the License for the specific terms
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// and conditions governing the rights and limitations under the License.
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//#include <Interface_Recognizer.ixx>
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#include <Standard_NoSuchObject.hxx>
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// ATTENTION : TransRecognizer a exactement le meme code ...
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// Mais produit un Transient au lieu d un Persistent
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// Principe : a un objet de depart (cle), un Recognizer tente d'associer un
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// resultat. La classe Recognizer offre le mecanisme general gerant cela
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// Chaque classe particuliere (une fois definie l'instanciation) doit fournir
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// une methode specifique Eval, qui opere la correspondance
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// Eval considere l'objet par tous moyens appropries, et en cas de succes,
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// appelle SetOK(result) puis sort (return)
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// en cas d'echec, suite au retour d'Eval, Recognizer sait que SetOK n'a pas
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// ete appele
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Interface_Recognizer::Interface_Recognizer ()
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{ hasnext = Standard_False; }
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//thekey.Nullify(); inutile, fait par le constructeur ...
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Standard_Boolean Interface_Recognizer::Evaluate
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(const TheKey& akey, Handle(TheResul)& res)
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{
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theres.Nullify();
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Eval(akey);
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if (!theres.IsNull()) {
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res = theres;
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return Standard_True;
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}
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else if (hasnext) return thenext->Evaluate(akey,res);
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return Standard_False;
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}
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Handle(TheResul) Interface_Recognizer::Result () const
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{
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if (!theres.IsNull()) return theres;
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if (hasnext) return thenext->Result();
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Standard_NoSuchObject::Raise ("Recognizer evaluation has failed");
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return theres; // pour calmer le compilateur
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}
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void Interface_Recognizer::Add (const Handle(Interface_Recognizer)& reco)
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{ thenext = reco; hasnext = Standard_True; }
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void Interface_Recognizer::SetOK (const Handle(TheResul)& aresult)
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{ theres = aresult; }
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void Interface_Recognizer::SetKO ()
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{ theres.Nullify(); }
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