| /****************************************************************************** |
| * Copyright (c) 2002, 2006 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.gmf.runtime.diagram.ui.dialogs.sortfilter; |
| |
| |
| import java.util.Locale; |
| |
| import org.eclipse.jface.viewers.ViewerSorter; |
| |
| import org.eclipse.gmf.runtime.notation.SortingDirection; |
| |
| import com.ibm.icu.text.Collator; |
| |
| /** |
| * Provides a <code>ViewerSorter</code> which tracks the type |
| * of sorting to ascending or descending orders. |
| * |
| * @author jcorchis |
| */ |
| public class SortFilterViewerSorter extends ViewerSorter { |
| |
| /** The sorting direction for comparator */ |
| private SortingDirection sortingDirection = SortingDirection.ASCENDING_LITERAL; |
| /** The hint for the sorting. Defines the item to sort on */ |
| protected int criteria; |
| /** The locale specific collator */ |
| protected Collator collator = Collator.getInstance(Locale.getDefault()); |
| |
| |
| /** |
| * Toggles the sorting direction from its current state. |
| */ |
| public void toggleSortingDirection() { |
| sortingDirection = (SortingDirection.ASCENDING_LITERAL.equals(sortingDirection)) |
| ? SortingDirection.DESCENDING_LITERAL |
| : SortingDirection.ASCENDING_LITERAL; |
| } |
| |
| /** |
| * @return Returns the sortingDirection. |
| */ |
| public SortingDirection getSortingDirection() { |
| return sortingDirection; |
| } |
| /** |
| * @param sortingDirection The sortingDirection to set. |
| */ |
| public void setSortingDirection(SortingDirection sortingDirection) { |
| this.sortingDirection = sortingDirection; |
| } |
| |
| /** |
| * @return Returns the criteria. |
| */ |
| public int getCriteria() { |
| return criteria; |
| } |
| |
| /** |
| * @param criteria The criteria to set. |
| */ |
| public void setCriteria(int criteria) { |
| this.criteria = criteria; |
| } |
| |
| /** |
| * compares the passed elements based on the current <code>SortingDirection |
| * </code> |
| * @param item1 first item |
| * @param item2 second item |
| * @return a negative number if the first item is before the |
| * second element; the value <code>0</code> if the first element is |
| * the same order as the second element; and a positive number if the first |
| * element is after the second element |
| */ |
| protected int compareString(String item1, String item2) { |
| |
| int result = 0; |
| if (SortingDirection.ASCENDING_LITERAL.equals(getSortingDirection())) { |
| result = collator.compare(item1, item2); |
| } else { |
| result = collator.compare(item2, item1); |
| } |
| |
| return result; |
| } |
| |
| /** |
| * compares the passed elements based on the current <code>SortingDirection |
| * </code> |
| * @param item1 first item |
| * @param item2 second item |
| * @return a negative number if the first item is before the |
| * second element; the value <code>0</code> if the first element is |
| * the same order as the second element; and a positive number if the first |
| * element is after the second element |
| */ |
| protected int compareVisible(String item1, String item2) { |
| int result = 0; |
| if (SortingDirection.ASCENDING_LITERAL.equals(getSortingDirection())) { |
| result = collator.compare(item1, item2); |
| } else { |
| result = collator.compare(item2, item1); |
| } |
| |
| return result; |
| } |
| } |