Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.ui / src / org / simantics / ui / workbench / e4 / E4ResourceEditorInput2.java

diff --git a/bundles/org.simantics.ui/src/org/simantics/ui/workbench/e4/E4ResourceEditorInput2.java b/bundles/org.simantics.ui/src/org/simantics/ui/workbench/e4/E4ResourceEditorInput2.java
new file mode 100644 (file)
index 0000000..c67fc68
--- /dev/null
+++ b/bundles/org.simantics.ui/src/org/simantics/ui/workbench/e4/E4ResourceEditorInput2.java
@@ -0,0 +1,104 @@
+package org.simantics.ui.workbench.e4;\r
+\r
+import org.simantics.Simantics;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.request.UniqueRead;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.variable.RVI;\r
+import org.simantics.db.layer0.variable.Variable;\r
+import org.simantics.db.layer0.variable.Variables;\r
+import org.simantics.ui.workbench.IResourceEditorInput2;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ * @since 1.22\r
+ */\r
+public class E4ResourceEditorInput2 extends E4ResourceEditorInput implements IResourceEditorInput2 {\r
+\r
+    protected final Resource model;\r
+    protected final String rvi;\r
+    protected transient Variable variable;\r
+\r
+    public E4ResourceEditorInput2(Resource resource, Resource model, String rvi) {\r
+        super(resource);\r
+        this.model = model;\r
+        this.rvi = rvi;\r
+    }\r
+\r
+    @Override\r
+    public void dispose() {\r
+        // Nullify to prevent the class from keeping unnecessary references to\r
+        // possible Variable implementation backend resources.\r
+        variable = null;\r
+    }\r
+\r
+    @Override\r
+    public Resource getModel(ReadGraph graph) {\r
+        return model;\r
+    }\r
+\r
+    @Override\r
+    public String getRVI() {\r
+        return rvi;\r
+    }\r
+\r
+    @Override\r
+    public boolean exists(ReadGraph graph) throws DatabaseException {\r
+        if (!super.exists(graph))\r
+            return false;\r
+\r
+        if (model != null) {\r
+            boolean modelExists = graph.hasStatement(model);\r
+            if (!modelExists)\r
+                return false;\r
+        }\r
+\r
+        if(rvi != null) {\r
+            Variable context = Variables.getPossibleConfigurationContext(graph, model);\r
+            if (context == null)\r
+                return false;\r
+            RVI rvi_ = RVI.fromResourceFormat(graph, rvi);\r
+            Variable variable = rvi_.resolvePossible(graph, context);\r
+            if (variable == null)\r
+                return false;\r
+        }\r
+\r
+        return true;\r
+    }\r
+\r
+    @Override\r
+    public Variable getVariable() throws DatabaseException {\r
+        if (variable != null)\r
+            return variable;\r
+        return Simantics.getSession().syncRequest(new UniqueRead<Variable>() {\r
+            @Override\r
+            public Variable perform(ReadGraph graph) throws DatabaseException {\r
+                return getVariable(graph);\r
+            }\r
+        });\r
+    }\r
+\r
+    protected Variable getVariable0(ReadGraph graph) throws DatabaseException {\r
+        Resource model = getModel(graph);\r
+        String rvi = getRVI();\r
+        // Model + RVI\r
+        if (rvi != null) {\r
+            Variable configuration = Variables.getConfigurationContext(graph, model);\r
+            RVI rrvi = RVI.fromResourceFormat(graph, rvi);\r
+            return rrvi.resolve(graph, configuration);\r
+        }\r
+        // Absolute URI\r
+        else {\r
+            return Variables.getVariable(graph, model);\r
+        }\r
+    }\r
+\r
+    @Override\r
+    public Variable getVariable(ReadGraph graph) throws DatabaseException {\r
+        Variable v = getVariable0(graph);\r
+        this.variable = v;\r
+        return v;\r
+    }\r
+\r
+}\r