--- /dev/null
+package org.simantics.db.layer0.scl;\r
+\r
+import org.simantics.databoard.Bindings;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.procedure.adapter.TransientCacheListener;\r
+import org.simantics.db.common.request.IndexRoot;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.scl.CompileValueRequest.CompilationContext;\r
+import org.simantics.db.layer0.util.RuntimeEnvironmentRequest;\r
+import org.simantics.db.layer0.variable.Variable;\r
+import org.simantics.layer0.Layer0;\r
+import org.simantics.scl.compiler.elaboration.expressions.EVariable;\r
+import org.simantics.scl.compiler.elaboration.expressions.Expression;\r
+import org.simantics.scl.compiler.environment.Environments;\r
+import org.simantics.scl.compiler.runtime.RuntimeEnvironment;\r
+import org.simantics.scl.compiler.top.SCLExpressionCompilationException;\r
+import org.simantics.scl.compiler.types.Type;\r
+import org.simantics.scl.runtime.SCLContext;\r
+import org.simantics.scl.runtime.function.Function1;\r
+\r
+/**\r
+ * Compiles an SCL expression that is attached to a literal\r
+ * whose parent is a component that is a part of a component type.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class CompileValueRequest extends AbstractExpressionCompilationRequest<CompilationContext, Variable> {\r
+\r
+ public static class CompilationContext extends AbstractExpressionCompilationContext {\r
+ public CompilationContext(RuntimeEnvironment runtimeEnvironment) {\r
+ super(runtimeEnvironment);\r
+ }\r
+ }\r
+\r
+ protected final Resource relation;\r
+ protected final Resource component;\r
+ protected final Resource literal;\r
+\r
+ public CompileValueRequest(Resource component, Resource literal, Resource relation) {\r
+ this.relation = relation;\r
+ this.component = component;\r
+ this.literal = literal;\r
+ }\r
+\r
+ public CompileValueRequest(ReadGraph graph, Variable context) throws DatabaseException {\r
+ this(context.getParent(graph).getRepresents(graph),\r
+ context.getRepresents(graph),\r
+ context.getPredicateResource(graph));\r
+ }\r
+\r
+ public static Object compileAndEvaluate(ReadGraph graph, Variable context) throws DatabaseException {\r
+ SCLContext sclContext = SCLContext.getCurrent();\r
+ Object oldGraph = sclContext.get("graph");\r
+ try {\r
+ Function1<Variable,Object> exp = graph.syncRequest(new CompileValueRequest(graph, context),\r
+ TransientCacheListener.<Function1<Variable,Object>>instance());\r
+ sclContext.put("graph", graph);\r
+ return exp.apply(context);\r
+ } catch (DatabaseException e) {\r
+ throw (DatabaseException)e;\r
+ } catch (Throwable t) {\r
+ throw new DatabaseException(t);\r
+ } finally {\r
+ sclContext.put("graph", oldGraph);\r
+ }\r
+ }\r
+\r
+ @Override\r
+ protected String getExpressionText(ReadGraph graph)\r
+ throws DatabaseException {\r
+ Layer0 L0 = Layer0.getInstance(graph);\r
+ return graph.getRelatedValue(literal, L0.SCLValue_expression, Bindings.STRING);\r
+ }\r
+\r
+ protected Resource getIndexRoot(ReadGraph graph) throws DatabaseException {\r
+ return graph.syncRequest(new IndexRoot(literal));\r
+ }\r
+\r
+ @Override\r
+ protected Type getExpectedType(ReadGraph graph, CompilationContext context)\r
+ throws DatabaseException {\r
+ Layer0 L0 = Layer0.getInstance(graph);\r
+ String valueType = graph.getPossibleRelatedValue(relation, L0.RequiresValueType, Bindings.STRING);\r
+ if(valueType != null) {\r
+ try {\r
+ return Environments.getType(context.runtimeEnvironment.getEnvironment(), valueType);\r
+ } catch (SCLExpressionCompilationException e) {\r
+ e.printStackTrace();\r
+ }\r
+ }\r
+ return super.getExpectedType(graph, context);\r
+ }\r
+\r
+ @Override\r
+ protected CompilationContext getCompilationContext(ReadGraph graph)\r
+ throws DatabaseException {\r
+ Resource indexRoot = getIndexRoot(graph);\r
+ RuntimeEnvironment runtimeEnvironment = graph.syncRequest(new RuntimeEnvironmentRequest(indexRoot));\r
+ return new CompilationContext(runtimeEnvironment);\r
+ }\r
+\r
+ @Override\r
+ protected Type getContextVariableType() {\r
+ return VARIABLE; \r
+ }\r
+\r
+ @Override\r
+ protected Expression getVariableAccessExpression(\r
+ ReadGraph graph,\r
+ CompilationContext context,\r
+ org.simantics.scl.compiler.elaboration.expressions.Variable contextVariable,\r
+ String name) throws DatabaseException {\r
+ if(name.equals("self"))\r
+ return new EVariable(contextVariable);\r
+ else\r
+ return null;\r
+ }\r
+\r
+}\r