1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.diagram.content;
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15 * @author Tuukka Lehtonen
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17 * @param <T> a comparable type
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19 public class OrderedPair<T extends Comparable<T>> {
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21 private final T first;
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22 private final T second;
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24 public OrderedPair(T first, T second) {
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25 assert first != null;
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26 assert second != null;
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28 int comp = first.compareTo(second);
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31 this.second = second;
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33 this.first = second;
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34 this.second = first;
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47 public int hashCode() {
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48 return (first.hashCode() * 31) + second.hashCode();
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52 public boolean equals(Object obj) {
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55 if (!(obj instanceof OrderedPair<?>))
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57 OrderedPair<?> other = (OrderedPair<?>) obj;
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58 return first.equals(other.first) && second.equals(other.second);
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61 public static <T extends Comparable<T>> OrderedPair<T> make(T ra, T rb) {
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62 return new OrderedPair<T>(ra, rb);
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