bundles/org.simantics.modeling/src/org/simantics/modeling/ComponentTypeScriptRuntimeEnvironmentRequest.java

   1 package org.simantics.modeling;\r
   2 \r
   3 import java.util.ArrayList;\r
   4 \r
   5 import org.simantics.db.ReadGraph;\r
   6 import org.simantics.db.common.request.ParametrizedPrimitiveRead;\r
   7 import org.simantics.db.procedure.Listener;\r
   8 import org.simantics.scl.compiler.environment.specification.EnvironmentSpecification;\r
   9 import org.simantics.scl.compiler.module.repository.ImportFailureException;\r
  10 import org.simantics.scl.compiler.module.repository.UpdateListener;\r
  11 import org.simantics.scl.compiler.runtime.RuntimeEnvironment;\r
  12 import org.simantics.scl.osgi.SCLOsgi;\r
  13 import org.simantics.scl.runtime.SCLContext;\r
  14 \r
  15 public class ComponentTypeScriptRuntimeEnvironmentRequest extends ParametrizedPrimitiveRead<EnvironmentSpecification, RuntimeEnvironment> {\r
  16 \r
  17     // This array list is only needed to keep strong references to update listeners preventing their garbage collection.\r
  18     ArrayList<UpdateListener> listeners;\r
  19     \r
  20     public ComponentTypeScriptRuntimeEnvironmentRequest(EnvironmentSpecification parameter) {\r
  21         super(parameter);\r
  22     }\r
  23 \r
  24     @Override\r
  25     public void register(ReadGraph graph, Listener<RuntimeEnvironment> procedure) {\r
  26         UpdateListener listener = null;\r
  27         if(!procedure.isDisposed()) {\r
  28             listener = new UpdateListener() {\r
  29                 @Override\r
  30                 public void notifyAboutUpdate() {\r
  31                     createRuntimeEnvironment(graph, procedure, this);\r
  32                 }\r
  33             };\r
  34             if(listeners == null)\r
  35                 listeners = new ArrayList<UpdateListener>(2);\r
  36             listeners.add(listener);\r
  37         }\r
  38         createRuntimeEnvironment(graph, procedure, listener);\r
  39     }\r
  40     \r
  41     private void createRuntimeEnvironment(ReadGraph graph, Listener<RuntimeEnvironment> procedure, UpdateListener listener) {\r
  42         SCLContext context = SCLContext.getCurrent();\r
  43         Object oldGraph = context.put("graph", graph);\r
  44         try {\r
  45             procedure.execute(SCLOsgi.MODULE_REPOSITORY.createRuntimeEnvironment(parameter, ComponentTypeScriptRuntimeEnvironmentRequest.class.getClassLoader(), listener));\r
  46         }\r
  47         catch (ImportFailureException e) {\r
  48             procedure.exception(e);\r
  49         }\r
  50         finally {\r
  51             context.put("graph", oldGraph);\r
  52         }\r
  53     }\r
  54 \r
  55 }\r