+/*******************************************************************************\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
+}
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