Migrated source code from Simantics SVN

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

diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/sorters/AbstractSorter.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/sorters/AbstractSorter.java
new file mode 100644 (file)
index 0000000..cfba183
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/sorters/AbstractSorter.java
@@ -0,0 +1,58 @@
+/*******************************************************************************\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.Arrays;\r
+import java.util.Comparator;\r
+import java.util.List;\r
+\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.exception.DatabaseException;\r
+\r
+public abstract class AbstractSorter<T> implements Sorter {\r
+\r
+    public abstract T getSortingCriterion(ReadGraph graph, BrowseContext context, NodeContext node) throws DatabaseException;\r
+    public abstract int compare(T a, T b);\r
+    \r
+    static class OrderNodeContext<T> {\r
+        public final NodeContext node;\r
+        public final T criterion;\r
+        \r
+        public OrderNodeContext(NodeContext node, T criterion) {        \r
+            this.node = node;\r
+            this.criterion = criterion;\r
+        }\r
+    }\r
+    \r
+    Comparator<OrderNodeContext<T>> comparator = new Comparator<OrderNodeContext<T>>() {\r
+        @Override\r
+        public int compare(OrderNodeContext<T> o1, OrderNodeContext<T> o2) {\r
+            return AbstractSorter.this.compare(o1.criterion, o2.criterion);\r
+        }        \r
+    };\r
+    \r
+    @Override\r
+    public void sort(ReadGraph graph, BrowseContext context, List<NodeContext> nodes) throws DatabaseException {\r
+        @SuppressWarnings("unchecked")\r
+        OrderNodeContext<T>[] orderNodes = new OrderNodeContext[nodes.size()];\r
+        for (int i = 0; i < orderNodes.length; i++) {\r
+            NodeContext node = nodes.get(i);\r
+            orderNodes[i] = new OrderNodeContext<T>(node, getSortingCriterion(graph, context, node));\r
+        }\r
+        Arrays.sort(orderNodes, comparator);\r
+        for (int i = 0; i < orderNodes.length; i++)\r
+            nodes.set(i, orderNodes[i].node);\r
+    }\r
+\r
+}\r