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1 /*******************************************************************************
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2 * Copyright (c) 2005, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *******************************************************************************/
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11 module org.eclipse.core.internal.databinding.Pair;
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12
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13 import java.lang.all;
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14
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15 /**
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16 * Class Pair. Represents a mathematical pair of objects (a, b).
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17 * @since 1.0
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18 */
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19 public class Pair {
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20
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21 /**
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22 * a in the pair (a, b)
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23 */
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24 public final Object a;
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25
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26 /**
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27 * b in the pair (a, b)
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28 */
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29 public final Object b;
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30
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31 /**
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32 * Construct a Pair(a, b)
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33 *
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34 * @param a a in the pair (a, b)
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35 * @param b b in the pair (a, b)
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36 */
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37 public this(Object a, Object b) {
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38 this.a = a;
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39 this.b = b;
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40 }
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41
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42 public int hashCode() {
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43 final int prime = 31;
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44 int result = 1;
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45 result = prime * result + ((a is null) ? 0 : a.hashCode());
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46 result = prime * result + ((b is null) ? 0 : b.hashCode());
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47 return result;
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48 }
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49
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50 public override bool opEquals(Object obj) {
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51 if (this is obj)
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52 return true;
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53 if (obj is null)
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54 return false;
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55 if (getClass() !is obj.getClass())
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56 return false;
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57 Pair other = cast(Pair) obj;
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58 if (a is null) {
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59 if (other.a !is null)
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60 return false;
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61 } else if (!a.equals(other.a))
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62 return false;
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63 if (b is null) {
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64 if (other.b !is null)
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65 return false;
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66 } else if (!b.equals(other.b))
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67 return false;
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68 return true;
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69 }
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70
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71 }
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