Mercurial > gemma
annotate pkg/common/attributes.go @ 4550:aa2d0006e742 iso-areas
Write iso lines between classes to SVG for debugging.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Mon, 30 Sep 2019 16:34:55 +0200 |
parents | 8c5df0f3562e |
children | 5f47eeea988d |
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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 is an interface to implement |
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30 // custom marshalling for the implementing type. |
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31 AttributesMarshaler interface { |
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32 MarshalAttributes(Attributes) error |
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33 } |
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34 |
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35 // AttributesUnmarshaler is and interface to implement |
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36 // custom unmarshalling for the implementing type. |
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37 AttributesUnmarshaler interface { |
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38 UnmarshalAttributes(Attributes) error |
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39 } |
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40 ) |
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41 |
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42 // Marshal fills src into ca. |
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43 func (ca Attributes) Marshal(src interface{}) error { |
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44 if ca == nil { |
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45 return nil |
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46 } |
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47 var err error |
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48 if m, ok := src.(AttributesMarshaler); ok { |
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49 err = m.MarshalAttributes(ca) |
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50 } |
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51 return err |
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52 } |
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53 |
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54 // Unmarshal stored ca into dst. |
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55 func (ca Attributes) Unmarshal(dst interface{}) error { |
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56 if ca == nil { |
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57 return nil |
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58 } |
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59 var err error |
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60 if um, ok := dst.(AttributesUnmarshaler); ok { |
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61 err = um.UnmarshalAttributes(ca) |
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62 } |
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63 return err |
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64 } |
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65 |
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66 // Delete removes a key and its associated value from these |
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67 // attriibutes. Return true if the key/value pair was deleted. |
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68 func (ca Attributes) Delete(key string) bool { |
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69 if ca == nil { |
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70 return false |
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71 } |
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72 if _, found := ca[key]; !found { |
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73 return false |
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74 } |
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75 delete(ca, key) |
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76 return true |
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77 } |
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78 |
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79 // Get fetches a value for given key out of the configuration. |
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80 // If the key was not found the bool component of the return value |
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81 // return false. |
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82 func (ca Attributes) Get(key string) (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 value, found := ca[key] |
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87 return value, found |
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88 } |
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89 |
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90 // Set stores a key/value pair in the attributes. |
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91 // Returns true if the storing succeeded. |
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92 func (ca Attributes) Set(key, value string) bool { |
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93 if ca == nil { |
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94 return false |
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95 } |
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96 ca[key] = value |
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97 return true |
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98 } |
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99 |
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100 // Bool returns a bool value for a given key. |
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101 func (ca Attributes) Bool(key string) bool { |
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102 s, found := ca.Get(key) |
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103 return found && strings.ToLower(s) == "true" |
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104 } |
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105 |
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106 // SetBool stores a bool value with a given key in |
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107 // this attributes. |
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108 // Returns true if the storing succeeded. |
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109 func (ca Attributes) SetBool(key string, value bool) bool { |
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110 var v string |
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111 if value { |
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112 v = "true" |
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113 } else { |
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114 v = "false" |
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115 } |
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116 return ca.Set(key, v) |
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117 } |
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118 |
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119 // Date returns a time.Time for a given key. |
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120 // Returns true if the key was found and the |
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121 // represents a date. |
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122 func (ca Attributes) Date(key string) (time.Time, bool) { |
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123 s, found := ca.Get(key) |
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124 if !found { |
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125 return time.Time{}, false |
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126 } |
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127 d, err := time.Parse(DateFormat, s) |
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128 if err != nil { |
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129 log.Printf("error: %v\n", err) |
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130 return time.Time{}, false |
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131 } |
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132 return d, true |
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133 } |
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134 |
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135 // SetDate stores a date with a given key in the attributes. |
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136 // Returns true if the storage succeeded. |
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137 func (ca Attributes) SetDate(key string, date time.Time) bool { |
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138 s := date.Format(DateFormat) |
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139 return ca.Set(key, s) |
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140 } |
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141 |
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142 // Time gives a time.Time for a given key. |
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143 func (ca Attributes) Time(key string) (time.Time, bool) { |
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144 s, found := ca.Get(key) |
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145 if !found { |
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146 return time.Time{}, false |
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147 } |
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148 t, err := time.Parse(TimeFormat, s) |
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149 if err != nil { |
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150 log.Printf("error: %v\n", err) |
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151 return time.Time{}, false |
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152 } |
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153 return t, true |
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154 } |
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155 |
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156 // SetTime stores a time with a given key in the attributes. |
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157 // Returns true if the storage succeeded. |
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158 func (ca Attributes) SetTime(key string, t time.Time) bool { |
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159 value := t.Format(TimeFormat) |
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160 return ca.Set(key, value) |
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161 |
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162 } |
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163 |
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164 // Int returns an int for a given key. |
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165 // Returns true if the key was found and the value |
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166 // is an integer. |
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167 func (ca Attributes) Int(key string) (int, bool) { |
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168 s, found := ca.Get(key) |
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169 if !found { |
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170 return 0, false |
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171 } |
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172 i, err := strconv.Atoi(s) |
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173 if err != nil { |
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174 log.Printf("error: %v\n", err) |
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175 return 0, false |
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176 } |
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177 return i, true |
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178 } |
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179 |
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180 // SetInt stores an int with a given key in the attributes. |
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181 // Returns true if the storage succeeded. |
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182 func (ca Attributes) SetInt(key string, value int) bool { |
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183 v := strconv.Itoa(value) |
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184 return ca.Set(key, v) |
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185 } |
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186 |
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187 // Float returns a float64 for a given key. |
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188 // Returns true if the key was found and the value |
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189 // is a floating point value. |
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190 func (ca Attributes) Float(key string) (float64, bool) { |
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191 s, found := ca.Get(key) |
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192 if !found { |
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193 return 0, false |
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194 } |
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195 f, err := strconv.ParseFloat(s, 64) |
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196 if err != nil { |
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197 log.Printf("error: %v\n", err) |
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198 return 0, false |
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199 } |
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200 return f, true |
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201 } |
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202 |
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203 // SetFloat stores an float64 with a given key in the attributes. |
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204 // Returns true if the storage succeeded. |
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205 func (ca Attributes) SetFloat(key string, value float64) bool { |
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206 v := strconv.FormatFloat(value, 'e', -1, 64) |
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207 return ca.Set(key, v) |
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208 } |
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209 |
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210 // Duration returns a duration for a given key. |
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211 // Returns true if the key was found and the value |
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212 // is a duration. |
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213 func (ca Attributes) Duration(key string) (time.Duration, bool) { |
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214 s, found := ca.Get(key) |
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215 if !found { |
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216 return 0, false |
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parents:
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217 } |
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218 d, err := time.ParseDuration(s) |
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219 if err != nil { |
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220 log.Printf("error: %v\n", err) |
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221 return 0, false |
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parents:
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222 } |
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223 return d, true |
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224 } |
2036
74e24ae3205a
Imports: Added a persistent model for the extra attributes.
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parents:
1985
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225 |
4162
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Made 'golint' and 'staticcheck' happy with common package.
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226 // SetDuration stores a duration with a given key in the attributes. |
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parents:
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227 // Returns true if the storage succeeded. |
2036
74e24ae3205a
Imports: Added a persistent model for the extra attributes.
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parents:
1985
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228 func (ca Attributes) SetDuration(key string, value time.Duration) bool { |
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1985
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229 v := value.String() |
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1985
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230 return ca.Set(key, v) |
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parents:
1985
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231 } |