bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/TGRepresentationUtils.java

   1 /*******************************************************************************
   2  * Copyright (c) 2016 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     Semantum Oy - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.layer0.util;
  13
  14 import java.util.Collections;
  15 import java.util.List;
  16 import java.util.Map;
  17 import java.util.Set;
  18
  19 import org.simantics.datatypes.literal.GUID;
  20 import org.simantics.db.ReadGraph;
  21 import org.simantics.db.Resource;
  22 import org.simantics.db.Statement;
  23 import org.simantics.db.common.request.PossibleIndexRoot;
  24 import org.simantics.db.exception.DatabaseException;
  25 import org.simantics.db.layer0.adapter.impl.EntityInstances.QueryIndex;
  26 import org.simantics.db.layer0.util.ConsistsOfProcess.InternalEntry;
  27 import org.simantics.db.layer0.util.DomainProcessor3.ExclusionDecision;
  28 import org.simantics.layer0.Layer0;
  29 import org.simantics.scl.runtime.function.Function1;
  30 import org.simantics.utils.datastructures.Pair;
  31
  32 /**
  33  * @author Antti Villberg
  34  * @author Tuukka Lehtonen
  35  * @since 1.22
  36  */
  37 public class TGRepresentationUtils {
  38
  39     public static boolean findByIdentifier(ReadGraph graph, Resource targetIndex, Resource source) throws DatabaseException {
  40         Layer0 L0 = Layer0.getInstance(graph);
  41         GUID guid = graph.getPossibleRelatedValue(source, L0.identifier, GUID.BINDING);
  42         if(guid != null) {
  43             List<Resource> exist = graph.syncRequest(new QueryIndex(targetIndex, L0.Entity, "GUID:" + guid.indexString()));
  44             return !exist.isEmpty();
  45         }
  46         return false;
  47     }
  48
  49     public static Function1<Statement, ExclusionDecision> computeExclusionFunction(ReadGraph graph, Resource[] resources, Map<String,Object> hints) throws DatabaseException {
  50         Resource targetResource = (Resource)hints.get(ClipboardUtils.HINT_TARGET_RESOURCE);
  51         if(targetResource != null) {
  52             Resource targetRoot = graph.syncRequest(new PossibleIndexRoot(targetResource));
  53             if(targetRoot != null) {
  54                 for(Resource r : resources) {
  55                     Resource sourceRoot = graph.syncRequest(new PossibleIndexRoot(r));
  56                     // We are copying a complete index root => no need to change guids
  57                     if(r.equals(sourceRoot))
  58                         continue;
  59                     if(targetRoot.equals(sourceRoot)) {
  60                         // Copy into same index root => guid rewrite is needed
  61                         return new GUIDExclusionFunction(graph);
  62                     }
  63                     // First try the root GUID
  64                     if(findByIdentifier(graph, targetRoot, r))
  65                         return new GUIDExclusionFunction(graph);
  66
  67                     // The root is OK - check everything beneath
  68                     Pair<List<InternalEntry>,Set<Resource>> pair = ConsistsOfProcess.walk(graph, null, Collections.singleton(r), Collections.emptySet(), true);
  69                     List<InternalEntry> entries = pair.first;
  70                     for(InternalEntry entry : entries) {
  71                         if(findByIdentifier(graph, targetRoot, entry.resource))
  72                             return new GUIDExclusionFunction(graph);
  73                     }
  74                 }
  75             }
  76         }
  77
  78         return null;
  79     }
  80
  81 }