--- /dev/null
+/*******************************************************************************\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.modeling.adapters;\r
+\r
+import gnu.trove.set.hash.THashSet;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.Set;\r
+\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.WriteGraph;\r
+import org.simantics.db.common.utils.OrderedSetUtils;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.adapter.Remover;\r
+import org.simantics.db.layer0.adapter.impl.AbstractRemover;\r
+import org.simantics.db.layer0.adapter.impl.EntityRemover;\r
+import org.simantics.db.layer0.util.RemoverUtil;\r
+import org.simantics.diagram.content.ConnectionUtil;\r
+import org.simantics.diagram.stubs.DiagramResource;\r
+import org.simantics.layer0.utils.binaryPredicates.OrderedSetElementsPredicate;\r
+import org.simantics.modeling.ModelingResources;\r
+import org.simantics.structural.stubs.StructuralResource2;\r
+\r
+/**\r
+ * A {@link Remover} implementation for removing DIA.Element instances.\r
+ * \r
+ * The implementation has separate paths for STR.Connection instances and other\r
+ * DIA.Element instances. For DIA.Element this remover will:\r
+ * <ol>\r
+ * <li>List connections/monitors the element is attached to</li>\r
+ * <li>Disconnect the element from its owner diagram(s)</li>\r
+ * <li>Remove the element itself with EntityRemover default logic</li>\r
+ * <li>Recursively remove all related degenerate connections, i.e. connections\r
+ * that only have one connector after remove the one connected to this removed\r
+ * element.</li>\r
+ * <li>Recursively remove monitors attached to the removed element</li>\r
+ * </ol>\r
+ * \r
+ * <p>\r
+ * For STR.Connections this remover will:\r
+ * <ol>\r
+ * <li>List all related data (monitors, mapped data)</li> \r
+ * <li>Remove the connection itself</li>\r
+ * <li>Remove the related data</li>\r
+ * </ol>\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class ElementRemover extends AbstractRemover {\r
+\r
+ private static final boolean DEBUG = false;\r
+\r
+ public ElementRemover(Resource element) {\r
+ super(element);\r
+ }\r
+\r
+ @Override\r
+ public void remove(WriteGraph graph) throws DatabaseException {\r
+ // 0. Find all connections to the removed element\r
+ StructuralResource2 STR = StructuralResource2.getInstance(graph);\r
+\r
+ if (graph.isInstanceOf(resource, STR.Connection)) {\r
+ removeConnection(graph);\r
+ } else {\r
+ removeElement(graph);\r
+ }\r
+ }\r
+\r
+ public void removeElement(WriteGraph graph) throws DatabaseException {\r
+ if (DEBUG)\r
+ System.out.println(this + " removing element");\r
+\r
+ Set<Resource> connectors = null;\r
+\r
+ StructuralResource2 STR = StructuralResource2.getInstance(graph);\r
+ DiagramResource DIA = DiagramResource.getInstance(graph);\r
+\r
+ Collection<Resource> connectedTo = graph.getObjects(resource, STR.IsConnectedTo);\r
+ for (Resource connector : connectedTo) {\r
+ if (connectors == null)\r
+ connectors = new THashSet<Resource>(connectedTo.size());\r
+ connectors.add(connector);\r
+ }\r
+ Collection<Resource> monitors = graph.getObjects(resource, DIA.HasMonitorComponent_Inverse);\r
+\r
+ if (DEBUG) {\r
+ if (connectors != null)\r
+ System.out.println(this + " found " + connectors.size() + " connectors connected to element");\r
+ if (!monitors.isEmpty())\r
+ System.out.println(this + " found " + monitors.size() + " monitors attached to element");\r
+ }\r
+\r
+ // 1. Disconnect element from diagrams\r
+ for (Resource diagram : OrderedSetElementsPredicate.INSTANCE.getSubjects(graph, resource)) {\r
+ OrderedSetUtils.remove(graph, diagram, resource);\r
+ }\r
+\r
+ // 2. Delete element itself\r
+ EntityRemover.remove(graph, resource);\r
+\r
+ // 3. Recursively remove all related degenerate connections\r
+ // i.e. connections that only have one connector after remove the\r
+ // one connected to this removed element.\r
+ ConnectionUtil cu = null;\r
+ Set<Resource> connectionsToRemove = null;\r
+ if (connectors != null) {\r
+ cu = new ConnectionUtil(graph);\r
+ Set<Resource> touchedConnections = new THashSet<Resource>(connectors.size());\r
+ for (Resource connector : connectors) {\r
+ Resource connection = ConnectionUtil.tryGetConnection(graph, connector);\r
+ if (connection != null)\r
+ touchedConnections.add(connection);\r
+ cu.removeConnectionPart(connector);\r
+ }\r
+ for (Resource connection : touchedConnections) {\r
+ int removedConnectors = cu.removeUnusedConnectors(connection);\r
+ if (DEBUG)\r
+ System.out.println(this + " PRUNED " + removedConnectors + " UNUSED CONNECTORS FROM TOUCHED CONNECTION " + connection);\r
+ while (true) {\r
+ int removedInteriorRouteNodes = cu.removeExtraInteriorRouteNodes(connection);\r
+ if (DEBUG)\r
+ System.out.println(this + " PRUNED " + removedInteriorRouteNodes + " INTERIOR ROUTE NODES FROM TOUCHED CONNECTION " + connection);\r
+ if (removedInteriorRouteNodes == 0)\r
+ break;\r
+ }\r
+ int connectorCount = cu.getConnectedConnectors(connection, null).size();\r
+ if (DEBUG)\r
+ System.out.println(this + " \t" + connectorCount + " CONNECTORS LEFT");\r
+ if (connectorCount < 2) {\r
+ if (connectionsToRemove == null)\r
+ connectionsToRemove = new THashSet<Resource>(touchedConnections.size());\r
+ connectionsToRemove.add(connection);\r
+ }\r
+ }\r
+ }\r
+ if (connectionsToRemove != null) {\r
+ for (Resource connection : connectionsToRemove) {\r
+ if (DEBUG)\r
+ System.out.println(this + " REMOVING connection " + connection);\r
+ RemoverUtil.remove(graph, connection);\r
+ }\r
+ }\r
+\r
+ // 4. Recursively remove monitors attached to element\r
+ if (!monitors.isEmpty())\r
+ for (Resource monitor : monitors)\r
+ RemoverUtil.remove(graph, monitor);\r
+\r
+ }\r
+\r
+ public void removeConnection(WriteGraph graph) throws DatabaseException {\r
+ if (DEBUG)\r
+ System.out.println(this + " removing connection element");\r
+\r
+ DiagramResource DIA = DiagramResource.getInstance(graph);\r
+ ModelingResources MOD = ModelingResources.getInstance(graph);\r
+\r
+ // 0. Get set of related data\r
+ Collection<Resource> objects = new ArrayList<Resource>();\r
+ for (Resource relation : new Resource[] {\r
+ DIA.HasMonitorComponent_Inverse,\r
+ MOD.ElementToComponent,\r
+ MOD.DiagramConnectionToConnection,\r
+ MOD.DiagramConnectionToConnectionSpecial\r
+ }) {\r
+ for (Resource object : graph.getObjects(resource, relation)) {\r
+ if (!object.equals(resource))\r
+ objects.add(object);\r
+ }\r
+ }\r
+\r
+ // 1. Remove connection itself\r
+ new ConnectionUtil(graph).removeConnection(resource);\r
+\r
+ // 2. Recursively remove related data\r
+ if (!objects.isEmpty())\r
+ for (Resource object : objects)\r
+ RemoverUtil.remove(graph, object);\r
+ }\r
+\r
+ @Override\r
+ public String toString() {\r
+ return getClass().getSimpleName() + resource;\r
+ }\r
+\r
+}\r
Code Review / simantics / platform.git / blobdiff