Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/CreateElementClassRequest.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/CreateElementClassRequest.java
new file mode 100644 (file)
index 0000000..72458c6
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/CreateElementClassRequest.java
@@ -0,0 +1,49 @@
+/*******************************************************************************\r
+ * Copyright (c) 2012 Association for Decentralized Information Management in\r
+ * 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.Resource;\r
+import org.simantics.db.common.request.BinaryAsyncRead;\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
+\r
+/**\r
+ * A request for retrieving an ElementClass based on an {@link ElementFactory},\r
+ * an element type (Resource), {@link ICanvasContext} and {@link IDiagram}. Only\r
+ * the canvas context and the element type are considered to identify the\r
+ * request uniquely. ElementFactory is not a part of the identification since\r
+ * element factories are originally resolved from element types and the at least\r
+ * the current implementations do not have proper equals/hashCode\r
+ * implementations which of destroys the possibility of DB request caching.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+class CreateElementClassRequest extends BinaryAsyncRead<Resource, ICanvasContext, ElementClass> {\r
+\r
+    private final ElementFactory elementFactory;\r
+    private final IDiagram       diagram;\r
+\r
+    public CreateElementClassRequest(ElementFactory elementFactory, Resource elementType, ICanvasContext canvas, IDiagram diagram) {\r
+        super(elementType, canvas);\r
+        this.elementFactory = elementFactory;\r
+        this.diagram = diagram;\r
+    }\r
+\r
+    @Override\r
+    public void perform(AsyncReadGraph graph, AsyncProcedure<ElementClass> procedure) {\r
+        elementFactory.create(graph, parameter2, diagram, parameter, procedure);\r
+    }\r
+\r
+}
\ No newline at end of file