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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.model.taxon;
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import java.util.Comparator;
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import java.util.Iterator;
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/**
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* Comparator to compare {@link TaxonNode taxon nodes} by its user defined ordering
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* @author k.luther
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*/
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public class TaxonNaturalComparator implements Comparator<TaxonNode> {
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public TaxonNaturalComparator(){
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super();
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}
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@Override
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public int compare(TaxonNode node1, TaxonNode node2) {
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// TaxonNode node1 = null;
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// TaxonNode node2 = null;
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// if (taxon1.getTaxonNodes().size()>0 && taxon2.getTaxonNodes().size()>0){
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// for (TaxonNode node: taxon1.getTaxonNodes()){
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// if (node.getClassification().equals(classification)){
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// node1= node;
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// break;
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// }
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// }
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// for (TaxonNode node: taxon2.getTaxonNodes()){
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// if (node.getClassification().equals(classification)){
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// node2= node;
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// break;
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// }
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// }
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// }else{
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// return 0;
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// }
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if (node1.isAncestor(node2)) {
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return 1;
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}
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if (node2.isAncestor(node1)) {
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return -1;
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}
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if (node1.equals(node2)) {
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return 0;
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}
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String[] splitNode1 = node1.treeIndex().split("#");
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String[] splitNode2 = node2.treeIndex().split("#");
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if (splitNode1.length < splitNode2.length) {
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return 1;
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} else if (splitNode2.length < splitNode1.length) {
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return -1;
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}
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if (node1.getParent().equals(node2.getParent())){
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return node1.getSortIndex().compareTo(node2.getSortIndex());
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}
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String lastEqualAncestorTreeIndex = null;
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Iterator<TaxonNode> ancestorsNode1 = node1.getAncestors().iterator();
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Iterator<TaxonNode> ancestorsNode2 = node2.getAncestors().iterator();
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for (int i = 0; i < splitNode1.length; i++){
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if (!splitNode1[i].equals(splitNode2[i])){
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// take the last equal ancestor and compare the sortindex
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if (lastEqualAncestorTreeIndex != null){
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TaxonNode lastEqualTreeIndexAncestorNode1 = null;
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TaxonNode lastEqualTreeIndexAncestorNode2 = null;
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while (ancestorsNode1.hasNext()){
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TaxonNode next1 = ancestorsNode1.next();
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if (next1.treeIndex().equals(lastEqualAncestorTreeIndex)){
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lastEqualTreeIndexAncestorNode1 = next1;
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}
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}
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while (ancestorsNode2.hasNext()){
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TaxonNode next2 = ancestorsNode2.next();
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if (next2.treeIndex().equals(lastEqualAncestorTreeIndex)){
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lastEqualTreeIndexAncestorNode2 = next2;
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}
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}
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return lastEqualTreeIndexAncestorNode1.getSortIndex().compareTo(lastEqualTreeIndexAncestorNode2.getSortIndex());
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}
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}
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lastEqualAncestorTreeIndex = splitNode1[i];
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}
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return 0;
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}
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}
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