Case Study: adding data and statistics

[ifi-stolz-refaktor.git] / case-study / jdt-before / ui / org / eclipse / jdt / internal / ui / workingsets / WorkingSetComparator.java

diff --git a/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/workingsets/WorkingSetComparator.java b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/workingsets/WorkingSetComparator.java
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+/*******************************************************************************
+ * Copyright (c) 2009, 2011 IBM Corporation and others.
+ * 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:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.ui.workingsets;
+
+import java.util.Comparator;
+
+import com.ibm.icu.text.Collator;
+
+import org.eclipse.ui.IWorkingSet;
+
+
+/**
+ * Comparator class to sort working sets, optionally keeping the default working set at the top.
+ * 
+ * @since 3.5
+ */
+public class WorkingSetComparator implements Comparator<IWorkingSet> {
+       
+       private Collator fCollator= Collator.getInstance();
+
+       /**
+        * Boolean value to determine whether to keep default working set on the top while sorting.
+        */
+       private boolean fIsOtherWorkingSetOnTop;
+
+
+       /**
+        * Creates new instance of the working set comparator.
+        */
+       public WorkingSetComparator() {
+               fIsOtherWorkingSetOnTop= false;
+       }
+
+       /**
+        * Creates a new instance of working set comparator and initializes the boolean field value to
+        * the given value, which determines whether or not the default working set is kept on top while
+        * sorting the working sets.
+        * 
+        * @param isOtherWorkingSetOnTop <code>true</code> if default working set is to be retained at
+        *            the top, <code>false</code> otherwise
+        */
+       public WorkingSetComparator(boolean isOtherWorkingSetOnTop) {
+               fIsOtherWorkingSetOnTop= isOtherWorkingSetOnTop;
+       }
+
+       /**
+        * Returns <code>-1</code> if the first argument is the default working set, <code>1</code> if
+        * the second argument is the default working set and if the boolean
+        * <code>fIsOtherWorkingSetOnTop</code> is set, to keep the default working set on top while
+        * sorting.
+        * 
+        * @see Comparator#compare(Object, Object)
+        */
+       public int compare(IWorkingSet w1, IWorkingSet w2) {
+
+               if (fIsOtherWorkingSetOnTop && IWorkingSetIDs.OTHERS.equals(w1.getId()))
+                       return -1;
+               
+               if (fIsOtherWorkingSetOnTop && IWorkingSetIDs.OTHERS.equals(w2.getId()))
+                       return 1;
+               
+               return fCollator.compare(w1.getLabel(), w2.getLabel());
+       }
+}
+