Mercurial > gemma
annotate pkg/common/attributes.go @ 3521:9538a0aeacde import_review
stretch_import: provide full information for summary
author | Thomas Junk <thomas.junk@intevation.de> |
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date | Wed, 29 May 2019 12:30:04 +0200 |
parents | dc4fae4bdb8f |
children | 8c5df0f3562e |
rev | line source |
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1 // This is Free Software under GNU Affero General Public License v >= 3.0 |
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2 // without warranty, see README.md and license for details. |
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3 // |
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4 // SPDX-License-Identifier: AGPL-3.0-or-later |
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5 // License-Filename: LICENSES/AGPL-3.0.txt |
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6 // |
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7 // Copyright (C) 2018, 2019 by via donau |
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH |
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9 // Software engineering by Intevation GmbH |
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10 // |
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11 // Author(s): |
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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13 // * Tom Gottfried <tom.gottfried@intevation.de> |
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14 |
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15 package common |
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16 |
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17 import ( |
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18 "log" |
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19 "strconv" |
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20 "strings" |
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21 "time" |
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22 ) |
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23 |
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24 type ( |
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25 // Attributes is a map of optional key/value attributes |
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26 // of a configuration. |
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27 Attributes map[string]string |
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28 |
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29 AttributesMarshaler interface { |
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30 MarshalAttributes(Attributes) error |
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31 } |
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32 |
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33 AttributesUnmarshaler interface { |
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34 UnmarshalAttributes(Attributes) error |
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35 } |
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36 ) |
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37 |
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38 func (ca Attributes) Marshal(src interface{}) error { |
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39 if ca == nil { |
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40 return nil |
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41 } |
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42 var err error |
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43 if m, ok := src.(AttributesMarshaler); ok { |
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44 err = m.MarshalAttributes(ca) |
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45 } |
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46 return err |
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47 } |
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48 |
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49 func (ca Attributes) Unmarshal(dst interface{}) error { |
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50 if ca == nil { |
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51 return nil |
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52 } |
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53 var err error |
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54 if um, ok := dst.(AttributesUnmarshaler); ok { |
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55 err = um.UnmarshalAttributes(ca) |
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56 } |
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57 return err |
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58 } |
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59 |
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60 func (ca Attributes) Delete(key string) bool { |
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61 if ca == nil { |
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62 return false |
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63 } |
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64 if _, found := ca[key]; !found { |
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65 return false |
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66 } |
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67 delete(ca, key) |
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68 return true |
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69 } |
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70 |
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71 // Get fetches a value for given key out of the configuration. |
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72 // If the key was not found the bool component of the return value |
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73 // return false. |
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74 func (ca Attributes) Get(key string) (string, bool) { |
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75 if ca == nil { |
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76 return "", false |
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77 } |
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78 value, found := ca[key] |
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79 return value, found |
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80 } |
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81 |
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82 func (ca Attributes) Set(key, value string) bool { |
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83 if ca == nil { |
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84 return false |
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85 } |
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86 ca[key] = value |
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87 return true |
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88 } |
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89 |
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90 // Bool returns a bool value for a given key. |
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91 func (ca Attributes) Bool(key string) bool { |
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92 s, found := ca.Get(key) |
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93 return found && strings.ToLower(s) == "true" |
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94 } |
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95 |
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96 func (ca Attributes) SetBool(key string, value bool) bool { |
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97 var v string |
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98 if value { |
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99 v = "true" |
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100 } else { |
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101 v = "false" |
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102 } |
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103 return ca.Set(key, v) |
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104 } |
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105 |
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106 func (ca Attributes) Date(key string) (time.Time, bool) { |
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107 s, found := ca.Get(key) |
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108 if !found { |
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109 return time.Time{}, false |
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110 } |
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111 d, err := time.Parse(DateFormat, s) |
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112 if err != nil { |
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113 log.Printf("error: %v\n", err) |
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114 return time.Time{}, false |
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115 } |
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116 return d, true |
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117 } |
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118 |
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119 func (ca Attributes) SetDate(key string, date time.Time) bool { |
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120 s := date.Format(DateFormat) |
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121 return ca.Set(key, s) |
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122 } |
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123 |
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124 // Time gives a time.Time for a given key. |
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125 func (ca Attributes) Time(key string) (time.Time, bool) { |
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126 s, found := ca.Get(key) |
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127 if !found { |
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128 return time.Time{}, false |
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129 } |
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130 t, err := time.Parse(TimeFormat, s) |
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131 if err != nil { |
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132 log.Printf("error: %v\n", err) |
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133 return time.Time{}, false |
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134 } |
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135 return t, true |
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136 } |
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137 |
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138 func (ca Attributes) SetTime(key string, t time.Time) bool { |
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139 value := t.Format(TimeFormat) |
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140 return ca.Set(key, value) |
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141 |
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142 } |
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143 |
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144 func (ca Attributes) Int(key string) (int, bool) { |
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145 s, found := ca.Get(key) |
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146 if !found { |
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147 return 0, false |
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148 } |
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149 i, err := strconv.Atoi(s) |
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150 if err != nil { |
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151 log.Printf("error: %v\n", err) |
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152 return 0, false |
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153 } |
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154 return i, true |
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155 } |
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156 |
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157 func (ca Attributes) SetInt(key string, value int) bool { |
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158 v := strconv.Itoa(value) |
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159 return ca.Set(key, v) |
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160 } |
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161 |
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162 func (ca Attributes) Float(key string) (float64, bool) { |
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163 s, found := ca.Get(key) |
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164 if !found { |
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165 return 0, false |
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166 } |
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167 f, err := strconv.ParseFloat(s, 64) |
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168 if err != nil { |
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169 log.Printf("error: %v\n", err) |
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170 return 0, false |
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171 } |
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172 return f, true |
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173 } |
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174 |
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175 func (ca Attributes) SetFloat(key string, value float64) bool { |
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176 v := strconv.FormatFloat(value, 'e', -1, 64) |
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177 return ca.Set(key, v) |
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178 } |
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179 |
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180 func (ca Attributes) Duration(key string) (time.Duration, bool) { |
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181 s, found := ca.Get(key) |
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182 if !found { |
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183 return 0, false |
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184 } |
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185 d, err := time.ParseDuration(s) |
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186 if err != nil { |
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187 log.Printf("error: %v\n", err) |
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188 return 0, false |
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189 } |
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190 return d, true |
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191 } |
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192 |
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193 func (ca Attributes) SetDuration(key string, value time.Duration) bool { |
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194 v := value.String() |
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195 return ca.Set(key, v) |
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196 } |