bundles/org.simantics.structural2/src/org/simantics/structural2/scl/CompileProceduralExpressionValueRequest.java

   1 package org.simantics.structural2.scl;\r
   2 \r
   3 import org.simantics.db.ReadGraph;\r
   4 import org.simantics.db.Resource;\r
   5 import org.simantics.db.common.procedure.adapter.TransientCacheListener;\r
   6 import org.simantics.db.exception.DatabaseException;\r
   7 import org.simantics.db.layer0.variable.Variable;\r
   8 import org.simantics.scl.runtime.SCLContext;\r
   9 import org.simantics.scl.runtime.function.Function1;\r
  10 \r
  11 public class CompileProceduralExpressionValueRequest extends AbstractCompileStructuralValueRequest {\r
  12     \r
  13     protected final String expression;\r
  14     protected final Resource componentType;\r
  15     protected final Resource indexRoot;\r
  16     \r
  17     public CompileProceduralExpressionValueRequest(String expression, Resource componentType, Resource relation, Resource indexRoot) {\r
  18         super(relation);\r
  19         this.expression = expression;\r
  20         this.componentType = componentType;\r
  21         this.indexRoot = indexRoot;\r
  22     }\r
  23     \r
  24     public CompileProceduralExpressionValueRequest(ReadGraph graph, String expression, Variable context) throws DatabaseException {\r
  25         this(expression, context.getParent(graph).getType(graph),\r
  26                 context.getPredicateResource(graph),\r
  27                 context.getIndexRoot(graph));\r
  28     }\r
  29     \r
  30     public static Object compileAndEvaluate(ReadGraph graph, String expression, Variable context) throws DatabaseException {\r
  31         SCLContext sclContext = SCLContext.getCurrent();\r
  32         Object oldGraph = sclContext.get("graph");\r
  33         try {\r
  34             Function1<Variable,Object> exp = graph.syncRequest(new CompileProceduralExpressionValueRequest(graph, expression, context),\r
  35                     TransientCacheListener.<Function1<Variable,Object>>instance());\r
  36             sclContext.put("graph", graph);\r
  37             return exp.apply(context);\r
  38         } catch (DatabaseException e) {\r
  39             throw (DatabaseException)e;\r
  40         } catch (Throwable t) {\r
  41             throw new DatabaseException(t);\r
  42         } finally {\r
  43             sclContext.put("graph", oldGraph);\r
  44         }\r
  45     }\r
  46     \r
  47     @Override\r
  48     protected String getExpressionText(ReadGraph graph) throws DatabaseException {\r
  49         return expression;\r
  50     }\r
  51 \r
  52     @Override\r
  53     protected Resource getIndexRoot(ReadGraph graph) throws DatabaseException {\r
  54         return indexRoot;\r
  55     }\r
  56 \r
  57     @Override\r
  58     protected Resource getComponentType(ReadGraph graph) throws DatabaseException {\r
  59         return componentType;\r
  60     }\r
  61 \r
  62 }\r