X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.browsing.ui.model%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fmodel%2Fsorters%2FLinkedListSorter.java;fp=bundles%2Forg.simantics.browsing.ui.model%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fmodel%2Fsorters%2FLinkedListSorter.java;h=ed27b7165c75f0f96e2de39bc9713ca1cb6ad195;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/sorters/LinkedListSorter.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/sorters/LinkedListSorter.java
new file mode 100644
index 000000000..ed27b7165
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/sorters/LinkedListSorter.java
@@ -0,0 +1,60 @@
+/*******************************************************************************
+ * Copyright (c) 2010, 2011 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.browsing.ui.model.sorters;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.simantics.browsing.ui.BuiltinKeys;
+import org.simantics.browsing.ui.NodeContext;
+import org.simantics.browsing.ui.model.browsecontexts.BrowseContext;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.common.utils.ListUtils;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.layer0.Layer0;
+
+public class LinkedListSorter implements Sorter {
+
+    public static final LinkedListSorter INSTANCE = new LinkedListSorter();
+    
+    private LinkedListSorter() {}
+
+	@Override
+	public void sort(ReadGraph graph, BrowseContext context, List<NodeContext> nodes) throws DatabaseException {
+
+		Layer0 L0 = Layer0.getInstance(graph);
+		Set<Resource> parents = new HashSet<Resource>();
+		Map<Resource, NodeContext> map = new HashMap<Resource, NodeContext>();
+		for(NodeContext node : nodes) {
+			Resource r = (Resource)node.getConstant(BuiltinKeys.INPUT);
+			Resource parent = graph.getPossibleObject(r, L0.PartOf);
+			parents.add(parent);
+			map.put(r, node);
+		}
+		
+		if(parents.contains(null)) return;
+		if(parents.size() != 1) return;
+
+		Resource parent = parents.iterator().next();
+		nodes.clear();
+		for(Resource r : ListUtils.toList(graph, parent))  {
+			NodeContext ctx = map.get(r);
+			if(ctx != null) nodes.add(ctx);
+		}
+    	
+    }
+
+}