bundles/org.simantics.databoard/src/org/simantics/databoard/binding/classfactory/TypeClassFactory.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management in\r
   3  * Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.databoard.binding.classfactory;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.HashMap;\r
  16 import java.util.List;\r
  17 import java.util.Map;\r
  18 import org.simantics.databoard.binding.error.BindingConstructionException;\r
  19 import org.simantics.databoard.binding.factory.TypeRepository;\r
  20 import org.simantics.databoard.binding.reflection.BindingRequest;\r
  21 import org.simantics.databoard.type.Datatype;\r
  22 \r
  23 /**\r
  24  * Creates class for a type. \r
  25  * \r
  26  * @author toni.kalajainen\r
  27  */\r
  28 public class TypeClassFactory {\r
  29         \r
  30         /**\r
  31          * Map of failed constructions. \r
  32          */\r
  33         Map<Datatype, BindingConstructionException> failures = new HashMap<Datatype, BindingConstructionException>();\r
  34         \r
  35         /**\r
  36          * Map that contains in incomplete constructions.\r
  37          */\r
  38         Map<Datatype, Datatype> inprogress = new HashMap<Datatype, Datatype>();\r
  39         \r
  40         /**\r
  41          * Repository where successful constructions are placed. \r
  42          */\r
  43         TypeRepository repository;\r
  44         \r
  45         List<TypeClassSubFactory> subFactories = new ArrayList<TypeClassSubFactory>();  \r
  46         \r
  47         public TypeClassFactory() {\r
  48                 repository = new TypeRepository(); \r
  49         }\r
  50         \r
  51         public TypeClassFactory(TypeRepository repository)\r
  52         {\r
  53                 this.repository = repository;\r
  54         }       \r
  55         \r
  56         public void addFactory(TypeClassSubFactory factory) \r
  57         {\r
  58                 if (!subFactories.contains(factory)) {\r
  59                         this.subFactories.add(factory);\r
  60                 }\r
  61         }\r
  62         \r
  63         public void addFactoryFirst(TypeClassSubFactory factory) \r
  64         {\r
  65                 if (!subFactories.contains(factory)) {\r
  66                         this.subFactories.add(0, factory);\r
  67                 }\r
  68         }\r
  69         \r
  70         \r
  71         public BindingRequest getClass(Datatype type) throws BindingConstructionException\r
  72         {\r
  73                 Datatype progress = inprogress.get(type);\r
  74                 if (progress != null) { synchronized(progress) {} }\r
  75                 if (failures.containsKey(type)) throw failures.get(type);\r
  76                 if (repository.containsType(type)) return repository.getRequestForType(type);\r
  77                 \r
  78                 // Start construction\r
  79                 synchronized(type) {\r
  80                         inprogress.put(type, type);\r
  81                         try {   \r
  82                                 BindingRequest br = null;\r
  83                                 for ( TypeClassSubFactory sf : subFactories ) {\r
  84                                         br = sf.construct(this, type);\r
  85                                         if ( br != null ) break;\r
  86                                 }\r
  87                                 if (br==null) throw new BindingConstructionException("Failed to create BindingRequest for type "+type);\r
  88                                 repository.put(type, br);\r
  89                                 return br;\r
  90                         } catch (RuntimeException e) {\r
  91                                 failures.put(type, new BindingConstructionException(e));\r
  92                                 throw e;\r
  93                         } catch (BindingConstructionException bce) {\r
  94                                 failures.put(type, bce);\r
  95                                 throw bce;\r
  96                         } finally {\r
  97                                 inprogress.remove(type);\r
  98                         }\r
  99                 }\r
 100                 \r
 101         }\r
 102         \r
 103         public TypeRepository getRepository() {\r
 104                 return repository;\r
 105         }\r
 106         \r
 107 }\r