bundles/org.simantics.databoard/src/org/simantics/databoard/binding/reflection/AsmBindingProvider.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.reflection;\r
  13 \r
  14 import java.lang.reflect.Constructor;\r
  15 import java.lang.reflect.InvocationTargetException;\r
  16 import java.util.WeakHashMap;\r
  17 \r
  18 import org.simantics.databoard.binding.Binding;\r
  19 import org.simantics.databoard.binding.RecordBinding;\r
  20 import org.simantics.databoard.binding.error.BindingConstructionException;\r
  21 import org.simantics.databoard.type.RecordType;\r
  22 \r
  23 /**\r
  24  * AsmBindingFactory creates code-generated bindings for classes.\r
  25  * \r
  26  * @author toni.kalajainen\r
  27  */\r
  28 public class AsmBindingProvider implements RecordBindingProvider {\r
  29         \r
  30         WeakHashMap<ClassLoader, AsmBindingClassLoader> bindingClassLoaders = new WeakHashMap<ClassLoader, AsmBindingClassLoader>();\r
  31 \r
  32         public AsmBindingProvider() {           \r
  33         }\r
  34 \r
  35         @Override\r
  36         public synchronized RecordBinding provideRecordBinding(Class<?> clazz, RecordType type)\r
  37                         throws BindingConstructionException {\r
  38                 \r
  39                 ClassLoader cl = clazz.getClassLoader();\r
  40                 if (cl == null) {\r
  41                         cl = Thread.currentThread().getContextClassLoader();\r
  42                 }\r
  43                 AsmBindingClassLoader bcl = bindingClassLoaders.get(cl);\r
  44                 if ( bcl == null ) {\r
  45                         bcl = new AsmBindingClassLoader(cl);\r
  46                         bindingClassLoaders.put(cl, bcl);\r
  47                 }\r
  48                 \r
  49                 ClassInfo ci = ClassInfo.getInfo(clazz);\r
  50                 try {                   \r
  51                         Class<?> bindingClass = bcl.getBindingClass( clazz );\r
  52                         Constructor<?> c = bindingClass.getConstructor( RecordType.class );\r
  53                         RecordBinding binding = (RecordBinding) c.newInstance( type );\r
  54                 binding.componentBindings = new Binding[ ci.fields.length ];  \r
  55                         return binding;\r
  56                 } catch (InstantiationException e) {\r
  57                         throw new BindingConstructionException(e);\r
  58                 } catch (IllegalAccessException e) {\r
  59                         throw new BindingConstructionException(e);\r
  60                 } catch (SecurityException e) {\r
  61                         throw new BindingConstructionException(e);\r
  62                 } catch (NoSuchMethodException e) {\r
  63                         throw new BindingConstructionException(e);\r
  64                 } catch (IllegalArgumentException e) {\r
  65                         throw new BindingConstructionException(e);\r
  66                 } catch (InvocationTargetException e) {\r
  67                         throw new BindingConstructionException(e.getCause());\r
  68                 } catch (ClassNotFoundException e) {\r
  69                         throw new BindingConstructionException(e);\r
  70                 }\r
  71         }\r
  72                         \r
  73 }\r