bundles/org.simantics.db.common/src/org/simantics/db/common/request/AdaptValue.java

   1 package org.simantics.db.common.request;
   2
   3 import org.simantics.db.ComputationalValue;
   4 import org.simantics.db.ReadGraph;
   5 import org.simantics.db.Resource;
   6 import org.simantics.db.common.utils.Functions;
   7 import org.simantics.db.exception.DatabaseException;
   8 import org.simantics.db.exception.RuntimeDatabaseException;
   9 import org.simantics.layer0.Layer0;
  10 import org.simantics.scl.runtime.function.FunctionImpl3;
  11
  12 /**
  13  * Adapts a resource to (SCL) value.
  14  * @author Hannu Niemist&ouml;
  15  */
  16 public class AdaptValue extends ResourceRead<Object> {
  17
  18     public AdaptValue(Resource resource) {
  19         super(resource);
  20     }
  21
  22     public static final FunctionImpl3<ReadGraph,Resource,Object,Object> functionApplication = new FunctionImpl3<ReadGraph,Resource,Object,Object>() {
  23
  24                 @Override
  25                 public Object apply(ReadGraph graph, Resource resource, Object context) {
  26                         try {
  27                                 return Functions.exec(graph, resource, graph, resource, context);
  28                         } catch (DatabaseException e) {
  29                                 throw new RuntimeDatabaseException(e);
  30                         }
  31                 }
  32
  33         };
  34
  35     @Override
  36     public Object perform(ReadGraph graph) throws DatabaseException {
  37         String uri = graph.getURI(resource);
  38         if(Layer0.URIs.Functions_functionApplication.equals(uri)) return functionApplication;
  39         ComputationalValue ev = graph.adapt(resource, ComputationalValue.class);
  40         return ev.getValue(graph, resource);
  41
  42     }
  43
  44 }