Mercurial > dive4elements > river
annotate backend/src/main/java/org/dive4elements/river/importer/parsers/LineParser.java @ 6296:4c2025ec109f
Minor refac.
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Wed, 12 Jun 2013 11:51:25 +0200 |
parents | 1173e9f47b52 |
children | c894b7b45c4c |
rev | line source |
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde |
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2 * Software engineering by Intevation GmbH |
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3 * |
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4 * This file is Free Software under the GNU AGPL (>=v3) |
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the |
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6 * documentation coming with Dive4Elements River for details. |
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7 */ |
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8 |
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9 package org.dive4elements.river.importer.parsers; |
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10 |
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11 import java.io.File; |
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12 |
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13 import java.text.DateFormat; |
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14 import java.text.NumberFormat; |
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15 import java.text.ParseException; |
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16 import java.text.SimpleDateFormat; |
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17 import java.util.Calendar; |
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18 import java.util.Date; |
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19 import java.util.Locale; |
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20 |
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21 import java.io.IOException; |
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22 import java.io.LineNumberReader; |
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23 import java.io.FileInputStream; |
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24 import java.io.InputStreamReader; |
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25 |
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26 import org.apache.log4j.Logger; |
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27 |
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28 |
4679 | 29 /** |
6294 | 30 * Base-Class for parsers for line-based file formats. |
4679 | 31 * Calls reset(), then read line by line, calling handleLine() for each, |
32 * then calls finish(). | |
33 */ | |
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34 public abstract class LineParser { |
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35 |
4679 | 36 /** Private logger. */ |
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37 private static final Logger log = Logger.getLogger(LineParser.class); |
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38 |
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39 public static final String ENCODING = "ISO-8859-1"; |
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40 |
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41 public static final Locale DEFAULT_LOCALE = Locale.GERMAN; |
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42 |
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43 public static final String START_META_CHAR = "#"; |
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44 public static final String SEPERATOR_CHAR = ";"; |
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45 |
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46 |
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47 protected abstract void handleLine(int lineNum, String line); |
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48 |
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49 protected abstract void reset(); |
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50 |
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51 protected abstract void finish(); |
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52 |
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53 /** Name of file parsed. */ |
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54 protected String fileName; |
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55 |
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56 protected File inputFile; |
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57 |
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58 |
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59 /** |
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60 * This method reads each line of <i>file</i>. At the beginning, |
4679 | 61 * <i>reset()</i> is called; afterwards for each line <i>handleLine()</i> is |
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62 * called; at the end <i>finish</i> is called. |
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63 * |
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64 * @param file The file which should be parsed. |
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65 */ |
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66 public void parse(File file) throws IOException { |
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67 log.info("Parsing file '" + file + "'"); |
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68 |
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69 inputFile = file; |
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70 |
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71 fileName = file.getName(); |
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72 |
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73 reset(); |
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74 |
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75 LineNumberReader in = null; |
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76 try { |
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77 in = |
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78 new LineNumberReader( |
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79 new InputStreamReader( |
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80 new FileInputStream(file), ENCODING)); |
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81 |
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82 String line = null; |
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83 int lineNum = 1; |
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84 while ((line = in.readLine()) != null) { |
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85 if ((line = line.trim()).length() == 0) { |
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86 lineNum++; |
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87 continue; |
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88 } |
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89 |
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90 handleLine(lineNum++, line); |
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91 } |
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92 } |
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93 finally { |
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94 if (in != null) { |
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95 in.close(); |
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96 } |
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97 } |
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98 |
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99 finish(); |
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100 } |
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101 |
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102 |
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103 /** Returns the name of the file parsed. */ |
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104 protected String getFileName() { |
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105 return fileName; |
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106 } |
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107 |
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108 /** Returns the file currently parsed. */ |
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109 protected File getInputFile() { |
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110 return inputFile; |
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111 } |
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112 |
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113 |
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114 protected static String stripMetaLine(String line) { |
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115 String tmp = line.substring(1, line.length()); |
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116 |
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117 if (tmp.startsWith(" ")) { |
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118 return tmp.substring(1, tmp.length()); |
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119 } |
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120 else { |
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121 return tmp; |
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122 } |
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123 } |
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124 |
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125 public static double getDouble(String doubleString) throws ParseException { |
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126 NumberFormat nf = NumberFormat.getInstance(DEFAULT_LOCALE); |
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127 Number value = nf.parse(doubleString); |
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128 |
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129 return value.doubleValue(); |
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130 } |
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131 |
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132 public static Date getDate(String dateString) throws ParseException { |
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133 DateFormat df = SimpleDateFormat.getDateInstance( |
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134 SimpleDateFormat.MEDIUM, DEFAULT_LOCALE); |
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135 |
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136 return df.parse(dateString); |
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137 } |
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138 |
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139 |
6294 | 140 /** Create Date on first moment (1st jan) of given year. */ |
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141 public static Date getStartDateFromYear(int year) { |
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142 Calendar cal = Calendar.getInstance(); |
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143 cal.clear(); |
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144 cal.set(year, 0, 1, 0, 0, 0); |
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145 |
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146 return cal.getTime(); |
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147 } |
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148 |
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150 /** Create Date on last moment (31st dec) of given year. */ |
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151 public static Date getEndDateFromYear(int year) { |
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152 Calendar cal = Calendar.getInstance(); |
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153 cal.clear(); |
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154 cal.set(year, 11, 31, 23, 59, 59); |
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155 |
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156 return cal.getTime(); |
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157 } |
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158 } |
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159 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |