Mercurial > hg > monetdb-java

annotate src/main/java/org/monetdb/mcl/net/HandshakeOption.java @ 918:2543e24eb79a

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Add final to more classes.
author Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
date Wed, 24 Jul 2024 19:38:33 +0200 (9 months ago)
parents e890195256ac
children d416e9b6b3d0
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1 /*
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2 * SPDX-License-Identifier: MPL-2.0
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3 *
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4 * This Source Code Form is subject to the terms of the Mozilla Public
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5 * License, v. 2.0. If a copy of the MPL was not distributed with this
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6 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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7 *
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8 * Copyright 2024 MonetDB Foundation;
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9 * Copyright August 2008 - 2023 MonetDB B.V.;
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10 * Copyright 1997 - July 2008 CWI.
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11 */
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12
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13 package org.monetdb.mcl.net;
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14
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15 public abstract class HandshakeOption<T> {
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16 protected final int level;
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17 protected final String handshakeField;
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18 boolean sent = false;
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19 T desiredValue;
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20
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21 protected HandshakeOption(int level, String handshakeField, T desiredValue) {
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22 if (desiredValue == null) {
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23 throw new IllegalArgumentException("initial value must not be null");
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24 }
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25 this.level = level;
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26 this.handshakeField = handshakeField;
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27 this.desiredValue = desiredValue;
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28 }
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29
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30 public void set(T newValue) {
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31 if (newValue == null) {
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32 throw new IllegalArgumentException("new value must not be null");
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33 }
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34 desiredValue = newValue;
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35 }
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36
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37 public T get() {
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38 return desiredValue;
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39 }
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40
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41 public int getLevel() {
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42 return level;
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43 }
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44
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45 public String getFieldName() {
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46 return handshakeField;
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47 }
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48
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49 public boolean isSent() {
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50 return sent;
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51 }
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52
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53 public void setSent(boolean b) {
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54 sent = b;
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55 }
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56
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57 public boolean mustSend(T currentValue) {
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58 if (sent)
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59 return false;
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60 if (currentValue.equals(desiredValue))
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61 return false;
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62 return true;
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63 }
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64
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65 abstract long numericValue();
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66
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67 protected static class BooleanOption extends HandshakeOption<Boolean> {
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68 protected BooleanOption(int level, String name, Boolean initialValue) {
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69 super(level, name, initialValue);
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70 }
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71
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72 @Override
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73 long numericValue() {
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74 return desiredValue ? 1 : 0;
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75 }
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76 }
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77
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78 public final static class AutoCommit extends BooleanOption {
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79 public AutoCommit(boolean autoCommit) {
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80 super(1, "auto_commit", autoCommit);
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81 }
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82 }
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83
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84 public final static class ReplySize extends HandshakeOption<Integer> {
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85 public ReplySize(int size) {
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86 super(2, "reply_size", size);
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87 }
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88
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89 @Override
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90 long numericValue() {
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91 return desiredValue;
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92 }
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93 }
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94
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95 public final static class SizeHeader extends BooleanOption {
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96 public SizeHeader(boolean sendHeader) {
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97 super(3, "size_header", sendHeader);
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98 set(sendHeader);
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99 }
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100 }
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101
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102 public final static class TimeZone extends HandshakeOption<Integer> {
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103 public TimeZone(int offset) {
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104 super(5, "time_zone", offset);
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105 }
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106
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107 @Override
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108 long numericValue() {
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109 return desiredValue;
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110 }
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111 }
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112 }