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
  18 import org.simantics.datatypes.literal.GUID;
  19 import org.simantics.db.ReadGraph;
  20 import org.simantics.db.Resource;
  21 import org.simantics.db.Statement;
  22 import org.simantics.db.common.request.PossibleIndexRoot;
  23 import org.simantics.db.exception.DatabaseException;
  24 import org.simantics.db.layer0.adapter.impl.EntityInstances.QueryIndex;
  25 import org.simantics.db.layer0.util.ConsistsOfProcess.InternalEntry;
  26 import org.simantics.db.layer0.util.DomainProcessor3.ExclusionDecision;
  27 import org.simantics.layer0.Layer0;
  28 import org.simantics.scl.runtime.function.Function1;
  29
  30 /**
  31  * @author Antti Villberg
  32  * @author Tuukka Lehtonen
  33  * @since 1.22
  34  */
  35 public class TGRepresentationUtils {
  36
  37     public static boolean findByIdentifier(ReadGraph graph, Resource targetIndex, Resource source) throws DatabaseException {
  38         Layer0 L0 = Layer0.getInstance(graph);
  39         GUID guid = graph.getPossibleRelatedValue(source, L0.identifier, GUID.BINDING);
  40         if(guid != null) {
  41             List<Resource> exist = graph.syncRequest(new QueryIndex(targetIndex, L0.Entity, "GUID:" + guid.indexString()));
  42             return !exist.isEmpty();
  43         }
  44         return false;
  45     }
  46
  47     public static Function1<Statement, ExclusionDecision> computeExclusionFunction(ReadGraph graph, Resource[] resources, Map<String,Object> hints) throws DatabaseException {
  48         Resource targetResource = (Resource)hints.get(ClipboardUtils.HINT_TARGET_RESOURCE);
  49         if(targetResource != null) {
  50             Resource targetRoot = graph.syncRequest(new PossibleIndexRoot(targetResource));
  51             if(targetRoot != null) {
  52                 for(Resource r : resources) {
  53                     Resource sourceRoot = graph.syncRequest(new PossibleIndexRoot(r));
  54                     // We are copying a complete index root => no need to change guids
  55                     if(r.equals(sourceRoot))
  56                         continue;
  57                     if(targetRoot.equals(sourceRoot)) {
  58                         // Copy into same index root => guid rewrite is needed
  59                         return new GUIDExclusionFunction(graph);
  60                     }
  61                     // First try the root GUID
  62                     if(findByIdentifier(graph, targetRoot, r))
  63                         return new GUIDExclusionFunction(graph);
  64
  65                     // The root is OK - check everything beneath
  66                     List<InternalEntry> entries = ConsistsOfProcess.walk(graph, null, Collections.singleton(r), Collections.emptySet(), true);
  67                     for(InternalEntry entry : entries) {
  68                         if(findByIdentifier(graph, targetRoot, entry.resource))
  69                             return new GUIDExclusionFunction(graph);
  70                     }
  71                 }
  72             }
  73         }
  74
  75         return null;
  76     }
  77
  78 }