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/**
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* Copyright (C) 2018 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.preference.wizard;
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import org.eclipse.jface.viewers.Viewer;
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import org.eclipse.jface.viewers.ViewerComparator;
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/**
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* @author k.luther
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* @since 04.10.2018
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*
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*/
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public class AreaViewerComparator extends ViewerComparator {
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/**
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* Returns a negative, zero, or positive number depending on whether
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* the first element is less than, equal to, or greater than
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* the second element.
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* <p>
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* The default implementation of this method is based on
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* comparing the elements' categories as computed by the <code>category</code>
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* framework method. Elements within the same category are further
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* subjected to a case insensitive compare of their label strings, either
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* as computed by the content viewer's label provider, or their
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* <code>toString</code> values in other cases. Subclasses may override.
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* </p>
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*
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* @param viewer the viewer
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* @param e1 the first element
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* @param e2 the second element
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* @return a negative number if the first element is less than the
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* second element; the value <code>0</code> if the first element is
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* equal to the second element; and a positive number if the first
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* element is greater than the second element
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*/
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@Override
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public int compare(Viewer viewer, Object e1, Object e2) {
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int cat1 = category(e1);
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int cat2 = category(e2);
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if (cat1 != cat2) {
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return cat1 - cat2;
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}
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if (e1 instanceof NamedAreaWrapper && e2 instanceof NamedAreaWrapper){
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NamedAreaWrapper wrapper1 = (NamedAreaWrapper)e1;
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NamedAreaWrapper wrapper2 = (NamedAreaWrapper)e2;
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if (wrapper1.isBaseElement == wrapper2.isBaseElement){
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return super.compare(viewer, e1, e2);
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}else if (wrapper1.isBaseElement){
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return -1;
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}else{
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return 1;
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}
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}else{
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return super.compare(viewer, e1, e2);
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}
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}
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}
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