Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / scl / CompileResourceValueRequest.java

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/scl/CompileResourceValueRequest.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/scl/CompileResourceValueRequest.java
new file mode 100644 (file)
index 0000000..feee796
--- /dev/null
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/scl/CompileResourceValueRequest.java
@@ -0,0 +1,109 @@
+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.CompileResourceValueRequest.CompilationContext;\r
+import org.simantics.db.layer0.util.RuntimeEnvironmentRequest;\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 Antti Villberg\r
+ */\r
+public class CompileResourceValueRequest extends AbstractExpressionCompilationRequest<CompilationContext, Resource> {\r
+\r
+    public static class CompilationContext extends AbstractExpressionCompilationContext {\r
+        public CompilationContext(RuntimeEnvironment runtimeEnvironment) {\r
+            super(runtimeEnvironment);\r
+        }\r
+    }\r
+\r
+    protected final Resource literal;\r
+\r
+    public CompileResourceValueRequest(Resource literal) {\r
+        this.literal = literal;\r
+    }\r
+\r
+    public static Object compileAndEvaluate(ReadGraph graph, Resource literal) throws DatabaseException {\r
+        SCLContext sclContext = SCLContext.getCurrent();\r
+        Object oldGraph = sclContext.get("graph");\r
+        try {\r
+            Function1<Resource,Object> exp = graph.syncRequest(new CompileResourceValueRequest(literal),\r
+                    TransientCacheListener.<Function1<Resource,Object>>instance());\r
+            sclContext.put("graph", graph);\r
+            return exp.apply(literal);\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(literal, L0.HasValueType, 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 RESOURCE; \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