X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.diagram%2Fsrc%2Forg%2Fsimantics%2Fdiagram%2Fadapter%2FCreateElementClassRequest.java;fp=bundles%2Forg.simantics.diagram%2Fsrc%2Forg%2Fsimantics%2Fdiagram%2Fadapter%2FCreateElementClassRequest.java;h=72458c6cbf2464cced52d7e4af9bfa35d5443b9c;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

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
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+/*******************************************************************************
+ * Copyright (c) 2012 Association for Decentralized Information Management in
+ * Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.diagram.adapter;
+
+import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.common.request.BinaryAsyncRead;
+import org.simantics.db.procedure.AsyncProcedure;
+import org.simantics.g2d.canvas.ICanvasContext;
+import org.simantics.g2d.diagram.IDiagram;
+import org.simantics.g2d.element.ElementClass;
+
+/**
+ * A request for retrieving an ElementClass based on an {@link ElementFactory},
+ * an element type (Resource), {@link ICanvasContext} and {@link IDiagram}. Only
+ * the canvas context and the element type are considered to identify the
+ * request uniquely. ElementFactory is not a part of the identification since
+ * element factories are originally resolved from element types and the at least
+ * the current implementations do not have proper equals/hashCode
+ * implementations which of destroys the possibility of DB request caching.
+ * 
+ * @author Tuukka Lehtonen
+ */
+class CreateElementClassRequest extends BinaryAsyncRead<Resource, ICanvasContext, ElementClass> {
+
+    private final ElementFactory elementFactory;
+    private final IDiagram       diagram;
+
+    public CreateElementClassRequest(ElementFactory elementFactory, Resource elementType, ICanvasContext canvas, IDiagram diagram) {
+        super(elementType, canvas);
+        this.elementFactory = elementFactory;
+        this.diagram = diagram;
+    }
+
+    @Override
+    public void perform(AsyncReadGraph graph, AsyncProcedure<ElementClass> procedure) {
+        elementFactory.create(graph, parameter2, diagram, parameter, procedure);
+    }
+
+}
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