X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.browsing.ui.model%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fmodel%2Fsorters%2FAbstractSorter.java;fp=bundles%2Forg.simantics.browsing.ui.model%2Fsrc%2Forg%2Fsimantics%2Fbrowsing%2Fui%2Fmodel%2Fsorters%2FAbstractSorter.java;h=cfba1833454b5ced047968ca80d4147df9acfe26;hp=0000000000000000000000000000000000000000;hb=969bd23cab98a79ca9101af33334000879fb60c5;hpb=866dba5cd5a3929bbeae85991796acb212338a08

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
index 000000000..cfba18334
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+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/sorters/AbstractSorter.java
@@ -0,0 +1,58 @@
+/*******************************************************************************
+ * 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.Arrays;
+import java.util.Comparator;
+import java.util.List;
+
+import org.simantics.browsing.ui.NodeContext;
+import org.simantics.browsing.ui.model.browsecontexts.BrowseContext;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.exception.DatabaseException;
+
+public abstract class AbstractSorter<T> implements Sorter {
+
+    public abstract T getSortingCriterion(ReadGraph graph, BrowseContext context, NodeContext node) throws DatabaseException;
+    public abstract int compare(T a, T b);
+    
+    static class OrderNodeContext<T> {
+        public final NodeContext node;
+        public final T criterion;
+        
+        public OrderNodeContext(NodeContext node, T criterion) {        
+            this.node = node;
+            this.criterion = criterion;
+        }
+    }
+    
+    Comparator<OrderNodeContext<T>> comparator = new Comparator<OrderNodeContext<T>>() {
+        @Override
+        public int compare(OrderNodeContext<T> o1, OrderNodeContext<T> o2) {
+            return AbstractSorter.this.compare(o1.criterion, o2.criterion);
+        }        
+    };
+    
+    @Override
+    public void sort(ReadGraph graph, BrowseContext context, List<NodeContext> nodes) throws DatabaseException {
+        @SuppressWarnings("unchecked")
+        OrderNodeContext<T>[] orderNodes = new OrderNodeContext[nodes.size()];
+        for (int i = 0; i < orderNodes.length; i++) {
+            NodeContext node = nodes.get(i);
+            orderNodes[i] = new OrderNodeContext<T>(node, getSortingCriterion(graph, context, node));
+        }
+        Arrays.sort(orderNodes, comparator);
+        for (int i = 0; i < orderNodes.length; i++)
+            nodes.set(i, orderNodes[i].node);
+    }
+
+}