X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.modeling%2Fsrc%2Forg%2Fsimantics%2Fmodeling%2Fadapters%2FElementRemover.java;fp=bundles%2Forg.simantics.modeling%2Fsrc%2Forg%2Fsimantics%2Fmodeling%2Fadapters%2FElementRemover.java;h=2699071465f9d90036a9f6ef7aa0e3b94a80c466;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git diff --git a/bundles/org.simantics.modeling/src/org/simantics/modeling/adapters/ElementRemover.java b/bundles/org.simantics.modeling/src/org/simantics/modeling/adapters/ElementRemover.java new file mode 100644 index 000000000..269907146 --- /dev/null +++ b/bundles/org.simantics.modeling/src/org/simantics/modeling/adapters/ElementRemover.java @@ -0,0 +1,196 @@ +/******************************************************************************* + * 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.modeling.adapters; + +import gnu.trove.set.hash.THashSet; + +import java.util.ArrayList; +import java.util.Collection; +import java.util.Set; + +import org.simantics.db.Resource; +import org.simantics.db.WriteGraph; +import org.simantics.db.common.utils.OrderedSetUtils; +import org.simantics.db.exception.DatabaseException; +import org.simantics.db.layer0.adapter.Remover; +import org.simantics.db.layer0.adapter.impl.AbstractRemover; +import org.simantics.db.layer0.adapter.impl.EntityRemover; +import org.simantics.db.layer0.util.RemoverUtil; +import org.simantics.diagram.content.ConnectionUtil; +import org.simantics.diagram.stubs.DiagramResource; +import org.simantics.layer0.utils.binaryPredicates.OrderedSetElementsPredicate; +import org.simantics.modeling.ModelingResources; +import org.simantics.structural.stubs.StructuralResource2; + +/** + * A {@link Remover} implementation for removing DIA.Element instances. + * + * The implementation has separate paths for STR.Connection instances and other + * DIA.Element instances. For DIA.Element this remover will: + *
    + *
  1. List connections/monitors the element is attached to
    2. + *
  2. Disconnect the element from its owner diagram(s)
    3. + *
  3. Remove the element itself with EntityRemover default logic
    4. + *
  4. Recursively remove all related degenerate connections, i.e. connections + * that only have one connector after remove the one connected to this removed + * element.
    5. + *
  5. Recursively remove monitors attached to the removed element
    6. + *
+ * + *

+ * For STR.Connections this remover will: + *

    + *
  1. List all related data (monitors, mapped data)
    2. + *
  2. Remove the connection itself
    3. + *
  3. Remove the related data
    4. + *
+ * + * @author Tuukka Lehtonen + */ +public class ElementRemover extends AbstractRemover { + + private static final boolean DEBUG = false; + + public ElementRemover(Resource element) { + super(element); + } + + @Override + public void remove(WriteGraph graph) throws DatabaseException { + // 0. Find all connections to the removed element + StructuralResource2 STR = StructuralResource2.getInstance(graph); + + if (graph.isInstanceOf(resource, STR.Connection)) { + removeConnection(graph); + } else { + removeElement(graph); + } + } + + public void removeElement(WriteGraph graph) throws DatabaseException { + if (DEBUG) + System.out.println(this + " removing element"); + + Set connectors = null; + + StructuralResource2 STR = StructuralResource2.getInstance(graph); + DiagramResource DIA = DiagramResource.getInstance(graph); + + Collection connectedTo = graph.getObjects(resource, STR.IsConnectedTo); + for (Resource connector : connectedTo) { + if (connectors == null) + connectors = new THashSet(connectedTo.size()); + connectors.add(connector); + } + Collection monitors = graph.getObjects(resource, DIA.HasMonitorComponent_Inverse); + + if (DEBUG) { + if (connectors != null) + System.out.println(this + " found " + connectors.size() + " connectors connected to element"); + if (!monitors.isEmpty()) + System.out.println(this + " found " + monitors.size() + " monitors attached to element"); + } + + // 1. Disconnect element from diagrams + for (Resource diagram : OrderedSetElementsPredicate.INSTANCE.getSubjects(graph, resource)) { + OrderedSetUtils.remove(graph, diagram, resource); + } + + // 2. Delete element itself + EntityRemover.remove(graph, resource); + + // 3. Recursively remove all related degenerate connections + // i.e. connections that only have one connector after remove the + // one connected to this removed element. + ConnectionUtil cu = null; + Set connectionsToRemove = null; + if (connectors != null) { + cu = new ConnectionUtil(graph); + Set touchedConnections = new THashSet(connectors.size()); + for (Resource connector : connectors) { + Resource connection = ConnectionUtil.tryGetConnection(graph, connector); + if (connection != null) + touchedConnections.add(connection); + cu.removeConnectionPart(connector); + } + for (Resource connection : touchedConnections) { + int removedConnectors = cu.removeUnusedConnectors(connection); + if (DEBUG) + System.out.println(this + " PRUNED " + removedConnectors + " UNUSED CONNECTORS FROM TOUCHED CONNECTION " + connection); + while (true) { + int removedInteriorRouteNodes = cu.removeExtraInteriorRouteNodes(connection); + if (DEBUG) + System.out.println(this + " PRUNED " + removedInteriorRouteNodes + " INTERIOR ROUTE NODES FROM TOUCHED CONNECTION " + connection); + if (removedInteriorRouteNodes == 0) + break; + } + int connectorCount = cu.getConnectedConnectors(connection, null).size(); + if (DEBUG) + System.out.println(this + " \t" + connectorCount + " CONNECTORS LEFT"); + if (connectorCount < 2) { + if (connectionsToRemove == null) + connectionsToRemove = new THashSet(touchedConnections.size()); + connectionsToRemove.add(connection); + } + } + } + if (connectionsToRemove != null) { + for (Resource connection : connectionsToRemove) { + if (DEBUG) + System.out.println(this + " REMOVING connection " + connection); + RemoverUtil.remove(graph, connection); + } + } + + // 4. Recursively remove monitors attached to element + if (!monitors.isEmpty()) + for (Resource monitor : monitors) + RemoverUtil.remove(graph, monitor); + + } + + public void removeConnection(WriteGraph graph) throws DatabaseException { + if (DEBUG) + System.out.println(this + " removing connection element"); + + DiagramResource DIA = DiagramResource.getInstance(graph); + ModelingResources MOD = ModelingResources.getInstance(graph); + + // 0. Get set of related data + Collection objects = new ArrayList(); + for (Resource relation : new Resource[] { + DIA.HasMonitorComponent_Inverse, + MOD.ElementToComponent, + MOD.DiagramConnectionToConnection, + MOD.DiagramConnectionToConnectionSpecial + }) { + for (Resource object : graph.getObjects(resource, relation)) { + if (!object.equals(resource)) + objects.add(object); + } + } + + // 1. Remove connection itself + new ConnectionUtil(graph).removeConnection(resource); + + // 2. Recursively remove related data + if (!objects.isEmpty()) + for (Resource object : objects) + RemoverUtil.remove(graph, object); + } + + @Override + public String toString() { + return getClass().getSimpleName() + resource; + } + +}