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1 /*
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2 CCmI Editor - A Collaborative Cross-Modal Diagram Editing Tool
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3
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4 Copyright (C) 2011 Queen Mary University of London (http://ccmi.eecs.qmul.ac.uk/)
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5
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6 This program is free software: you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation, either version 3 of the License, or
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9 (at your option) any later version.
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10
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11 This program is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 */
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19
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20 package uk.ac.qmul.eecs.ccmi.utils;
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21
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22 /**
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23 *
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24 * A Pair of objects.
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25 *
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26 * @param <T1> The first item type
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27 * @param <T2> The second item type
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28 */
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29 public class Pair<T1,T2> {
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30 public Pair(T1 first, T2 second){
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31 this.first = first;
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32 this.second = second;
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33 }
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34
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35 @Override
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36 public int hashCode() {
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37 final int prime = 31;
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38 int result = 1;
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39 result = prime * result + ((first == null) ? 0 : first.hashCode());
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40 result = prime * result + ((second == null) ? 0 : second.hashCode());
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41 return result;
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42 }
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43
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44 @Override
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45 public boolean equals(Object obj) {
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46 if (this == obj)
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47 return true;
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48 if (obj == null)
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49 return false;
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50 if (getClass() != obj.getClass())
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51 return false;
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52 @SuppressWarnings("rawtypes")
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53 Pair other = (Pair) obj;
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54 if (first == null) {
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55 if (other.first != null)
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56 return false;
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57 } else if (!first.equals(other.first))
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58 return false;
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59 if (second == null) {
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60 if (other.second != null)
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61 return false;
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62 } else if (!second.equals(other.second))
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63 return false;
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64 return true;
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65 }
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66
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67 /**
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68 * the first item of the pair
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69 */
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70 public T1 first;
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71 /**
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72 * the second item of the pair
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73 */
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74 public T2 second;
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75 }
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