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annotate src/org/tmatesoft/hg/util/Pair.java @ 443:072b5f3ed0c8

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Path to tell immediate parent-child relationship; more powerful scope impl; tests for both
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 04 May 2012 17:59:22 +0200
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children 5311e041d2dd
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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1 /*
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2 * Copyright (c) 2011-2012 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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50 @Override
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51 public String toString() {
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52 StringBuilder sb = new StringBuilder();
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53 sb.append('<');
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54 sb.append(first());
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55 sb.append(':');
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56 sb.append(second());
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57 sb.append('>');
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58 return sb.toString();
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59 }
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60 }
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