Mercurial > dive4elements > river

annotate backend/src/main/java/org/dive4elements/river/importer/parsers/LineParser.java @ 7252:c894b7b45c4c

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Replaced some tabs by spaces. Guys, please configure your editors not to insert tabs!
author Sascha L. Teichmann <teichmann@intevation.de>
date Sat, 05 Oct 2013 12:48:44 +0200
parents cc11780b3491
children 07cc4cd9233e
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
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29 /**
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30 * Base-Class for parsers for line-based file formats.
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31 * Calls reset(), then read line by line, calling handleLine() for each,
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32 * then calls finish().
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33 */
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34 public abstract class LineParser {
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35
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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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47 protected abstract void handleLine(int lineNum, String line);
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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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59 /**
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60 * This method reads each line of <i>file</i>. At the beginning,
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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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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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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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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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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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114 protected static String stripMetaLine(String line) {
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115 String tmp = line.substring(1, line.length());
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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
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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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149
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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 :
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