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

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