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/**
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* Copyright (C) 2007 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.cdm.api.utility;
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import java.util.Comparator;
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import java.util.Set;
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import eu.etaxonomy.cdm.common.TreeNode;
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import eu.etaxonomy.cdm.model.description.Distribution;
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import eu.etaxonomy.cdm.model.location.NamedArea;
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/**
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* Comparator to order distribution tree nodes according to the "natural" order
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* defined by the ordered {@link NamedArea} vocabulary.
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*
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* @author a.mueller
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\* @since 04.04.2016
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*
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*/
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public class DistributionNodeByAreaOrderComparator implements Comparator<TreeNode<Set<Distribution>, NamedArea>>{
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@Override
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public int compare(TreeNode<Set<Distribution>, NamedArea> node1, TreeNode<Set<Distribution>, NamedArea> node2) {
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if (node1.equals(node2)){
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return 0;
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}
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NamedArea area1 = node1.getNodeId();
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NamedArea area2 = node2.getNodeId();
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if (area1 == null && area2 == null){
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return 0;
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}else if (area1 == null){
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return -1;
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}else if (area2 == null){
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return 1;
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}else{
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return - area1.compareTo(area2); //term compare methods currently use wrong direction
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}
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}
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}
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