Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.diagram / src / org / simantics / diagram / adapter / SyncElementFactory.java

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/SyncElementFactory.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/SyncElementFactory.java
new file mode 100644 (file)
index 0000000..be03b91
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/SyncElementFactory.java
@@ -0,0 +1,72 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.diagram.adapter;\r
+\r
+import org.simantics.db.AsyncReadGraph;\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.procedure.AsyncProcedure;\r
+import org.simantics.g2d.canvas.ICanvasContext;\r
+import org.simantics.g2d.diagram.IDiagram;\r
+import org.simantics.g2d.element.ElementClass;\r
+import org.simantics.g2d.element.IElement;\r
+\r
+/**\r
+ * A synchronous graph request wrapper for {@link ElementFactory} and\r
+ * {@link ElementFactoryAdapter}. Using it will provide simpler but slower\r
+ * implementations.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class SyncElementFactory extends ElementFactoryAdapter {\r
+\r
+    @Override\r
+    public void create(AsyncReadGraph graph, final ICanvasContext canvas, final IDiagram diagram,\r
+            final Resource elementType, final AsyncProcedure<ElementClass> procedure) {\r
+        graph.asyncRequest(new UniqueRead<ElementClass>() {\r
+            @Override\r
+            public ElementClass perform(ReadGraph graph) throws DatabaseException {\r
+                return create(graph, canvas, diagram, elementType);\r
+            }\r
+        }, procedure);\r
+    }\r
+\r
+    @Override\r
+    public void load(AsyncReadGraph graph, final ICanvasContext canvas, final IDiagram diagram,\r
+            final Resource elementResource, final IElement element, final AsyncProcedure<IElement> procedure) {\r
+        graph.asyncRequest(new UniqueRead<IElement>() {\r
+            @Override\r
+            public IElement perform(ReadGraph graph) throws DatabaseException {\r
+               if(isOk(graph, elementResource))\r
+                       load(graph, canvas, diagram, elementResource, element);\r
+                return element;\r
+            }\r
+        }, procedure);\r
+    }\r
+\r
+    public ElementClass create(ReadGraph graph, ICanvasContext canvas, IDiagram diagram, Resource elementType)\r
+    throws DatabaseException {\r
+        throw new UnsupportedOperationException();\r
+    }\r
+    \r
+    public boolean isOk(ReadGraph graph, Resource elementResource) throws DatabaseException {\r
+       return graph.hasStatement(elementResource);\r
+    }\r
+\r
+    public void load(ReadGraph graph, ICanvasContext canvas, IDiagram diagram, Resource elementResource, IElement element)\r
+    throws DatabaseException {\r
+        throw new UnsupportedOperationException();\r
+    }\r
+\r
+}\r