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annotate src/org/tmatesoft/hg/util/Pair.java @ 338:3cfa4d908fc9

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Add options to control DataAccessProvider, allow to turn off use of file memory mapping in particular to solve potential sharing violation (os file handle gets released on MappedByteByffer being GC'd, not on FileChannel.close())
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 15 Nov 2011 04:47:03 +0100
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children b015f3918120
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1 /*
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2 * Copyright (c) 2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.util;
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18
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19 import org.tmatesoft.hg.internal.Experimental;
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20
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21 /**
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22 * Nothing but a holder for two values.
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23 *
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24 * @author Artem Tikhomirov
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25 * @author TMate Software Ltd.
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26 */
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27 @Experimental
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28 public final class Pair<T1,T2> {
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29 private final T1 value1;
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30 private final T2 value2;
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31
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32 public Pair(T1 v1, T2 v2) {
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33 value1 = v1;
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34 value2 = v2;
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35 }
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36
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37 public T1 first() {
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38 return value1;
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39 }
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40 public T2 second() {
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41 return value2;
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42 }
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43 public boolean hasFirst() {
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44 return value1 != null;
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45 }
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46 public boolean hasSecond() {
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47 return value2 != null;
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48 }
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49 }
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