X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.modeling.template2d.ui%2Fsrc%2Forg%2Fsimantics%2Fmodeling%2Ftemplate2d%2Fui%2Factions%2FFixLinkedList.java;fp=bundles%2Forg.simantics.modeling.template2d.ui%2Fsrc%2Forg%2Fsimantics%2Fmodeling%2Ftemplate2d%2Fui%2Factions%2FFixLinkedList.java;h=2963144cc74e303fa20f51f3880e5b0b4e3c2352;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.modeling.template2d.ui/src/org/simantics/modeling/template2d/ui/actions/FixLinkedList.java b/bundles/org.simantics.modeling.template2d.ui/src/org/simantics/modeling/template2d/ui/actions/FixLinkedList.java
new file mode 100644
index 000000000..2963144cc
--- /dev/null
+++ b/bundles/org.simantics.modeling.template2d.ui/src/org/simantics/modeling/template2d/ui/actions/FixLinkedList.java
@@ -0,0 +1,79 @@
+/*******************************************************************************
+ * 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.template2d.ui.actions;
+
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import org.simantics.Simantics;
+import org.simantics.db.Resource;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.request.ObjectsWithType;
+import org.simantics.db.common.request.WriteRequest;
+import org.simantics.db.common.utils.ListUtils;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.adapter.ActionFactory;
+import org.simantics.db.layer0.util.RemoverUtil;
+import org.simantics.layer0.Layer0;
+import org.simantics.scenegraph.ontology.ScenegraphResources;
+
+public class FixLinkedList implements ActionFactory {
+
+    @Override
+    public Runnable create(Object target) {
+        if(!(target instanceof Resource))
+            return null;
+        final Resource parent = (Resource)target;
+
+        return new Runnable() {
+            @Override
+            public void run() {
+                Simantics.getSession().asyncRequest(new WriteRequest() {
+                    @Override
+                    public void perform(WriteGraph g) throws DatabaseException {
+                        g.markUndoPoint();
+                        Layer0 L0 = Layer0.getInstance(g);
+                        ScenegraphResources SG = ScenegraphResources.getInstance(g);
+
+                        Collection<Resource> consist = g.syncRequest(new ObjectsWithType(parent, L0.ConsistsOf, SG.Node));
+
+                        Resource list = g.getPossibleObject(parent, SG.Node_children);
+                        if (list != null) {
+                            try {
+                                List<Resource> children = ListUtils.toList(g, list);
+                                Set<Resource> childSet = new HashSet<Resource>(children);
+                                Set<Resource> consistSet = new HashSet<Resource>(consist);
+                                if (childSet.equals(consistSet)) {
+                                    return;
+                                }
+                            } catch (DatabaseException e) {
+                            }
+
+                            // List is invalid, recreate it.
+                            RemoverUtil.remove(g, list);
+                            g.deny(parent, SG.Node_children);
+                            list = ListUtils.create(g, consist);
+                            g.claim(parent, SG.Node_children, list);
+
+                        } else {
+                            // No list at all - create one from children.
+                            list = ListUtils.create(g, consist);
+                            g.claim(parent, SG.Node_children, list);
+                        }
+                    }
+                });
+            }
+        };
+    }
+}