Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.model / src / org / simantics / browsing / ui / model / sorters / LinkedListSorter.java

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 (file)
index 0000000..ed27b71
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/sorters/LinkedListSorter.java
@@ -0,0 +1,60 @@
+/*******************************************************************************\r
+ * Copyright (c) 2010, 2011 Association for Decentralized Information Management in\r
+ * Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ *     VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.browsing.ui.model.sorters;\r
+\r
+import java.util.HashMap;\r
+import java.util.HashSet;\r
+import java.util.List;\r
+import java.util.Map;\r
+import java.util.Set;\r
+\r
+import org.simantics.browsing.ui.BuiltinKeys;\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.browsing.ui.model.browsecontexts.BrowseContext;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.utils.ListUtils;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.layer0.Layer0;\r
+\r
+public class LinkedListSorter implements Sorter {\r
+\r
+    public static final LinkedListSorter INSTANCE = new LinkedListSorter();\r
+    \r
+    private LinkedListSorter() {}\r
+\r
+       @Override\r
+       public void sort(ReadGraph graph, BrowseContext context, List<NodeContext> nodes) throws DatabaseException {\r
+\r
+               Layer0 L0 = Layer0.getInstance(graph);\r
+               Set<Resource> parents = new HashSet<Resource>();\r
+               Map<Resource, NodeContext> map = new HashMap<Resource, NodeContext>();\r
+               for(NodeContext node : nodes) {\r
+                       Resource r = (Resource)node.getConstant(BuiltinKeys.INPUT);\r
+                       Resource parent = graph.getPossibleObject(r, L0.PartOf);\r
+                       parents.add(parent);\r
+                       map.put(r, node);\r
+               }\r
+               \r
+               if(parents.contains(null)) return;\r
+               if(parents.size() != 1) return;\r
+\r
+               Resource parent = parents.iterator().next();\r
+               nodes.clear();\r
+               for(Resource r : ListUtils.toList(graph, parent))  {\r
+                       NodeContext ctx = map.get(r);\r
+                       if(ctx != null) nodes.add(ctx);\r
+               }\r
+       \r
+    }\r
+\r
+}\r