root / tags / v1_0_2_Build_916 / applications / appgvSIG / src / com / vividsolutions / jump / util / FlexibleDateParser.java @ 12327
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1 | 312 | fernando | /*
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2 | * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI
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3 | * for visualizing and manipulating spatial features with geometry and attributes.
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4 | *
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5 | * Copyright (C) 2003 Vivid Solutions
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6 | *
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7 | * This program is free software; you can redistribute it and/or
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8 | * modify it under the terms of the GNU General Public License
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9 | * as published by the Free Software Foundation; either version 2
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10 | * of the License, or (at your option) any later version.
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11 | *
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12 | * This program is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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20 | *
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21 | * For more information, contact:
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22 | *
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23 | * Vivid Solutions
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24 | * Suite #1A
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25 | * 2328 Government Street
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26 | * Victoria BC V8T 5G5
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27 | * Canada
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28 | *
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29 | * (250)385-6040
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30 | * www.vividsolutions.com
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31 | */
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32 | package com.vividsolutions.jump.util; |
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33 | |||
34 | import java.awt.Color; |
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35 | import java.awt.Component; |
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36 | import java.io.IOException; |
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37 | import java.io.InputStream; |
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38 | import java.text.DateFormat; |
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39 | import java.text.ParseException; |
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40 | import java.text.ParsePosition; |
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41 | import java.text.SimpleDateFormat; |
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42 | import java.util.ArrayList; |
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43 | import java.util.Calendar; |
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44 | import java.util.Collection; |
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45 | import java.util.Comparator; |
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46 | import java.util.Date; |
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47 | import java.util.Iterator; |
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48 | import java.util.TreeSet; |
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49 | |||
50 | import javax.swing.DefaultCellEditor; |
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51 | import javax.swing.JComponent; |
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52 | import javax.swing.JTable; |
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53 | import javax.swing.JTextField; |
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54 | import javax.swing.border.LineBorder; |
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55 | |||
56 | 8765 | jjdelcerro | import com.vividsolutions.jts.util.Assert; |
57 | |||
58 | 312 | fernando | /**
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59 | * Warning: This class can parse a wide variety of formats. This flexibility is fine for parsing user
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60 | * input because the user immediately sees whether the parser is correct and can fix it if
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61 | * necessary. However, GML files are advised to stick with a safe format like yyyy-MM-dd.
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62 | * yy/MM/dd is not as safe because while 99/03/04 will be parsed as yyyy/MM/dd,
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63 | * 02/03/04 will be parsed as MM/dd/yyyy (because MM/dd/yyyy appears earlier than yyyy/MM/dd
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64 | * in FlexibleDateParser.txt).
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65 | */
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66 | public class FlexibleDateParser { |
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67 | private static Collection lenientFormatters = null; |
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68 | private static Collection unlenientFormatters = null; |
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69 | //CellEditor used to be a static field CELL_EDITOR, but I was getting
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70 | //problems calling it from ESETextField (it simply didn't appear).
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71 | //The problems vanished when I turned it into a static class. I didn't
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72 | //investigate further. [Jon Aquino]
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73 | public static final class CellEditor extends DefaultCellEditor { |
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74 | public CellEditor() { |
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75 | super(new JTextField()); |
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76 | } |
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77 | private Object value; |
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78 | private FlexibleDateParser parser = new FlexibleDateParser(); |
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79 | |||
80 | public boolean stopCellEditing() { |
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81 | try {
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82 | value = parser.parse((String) super.getCellEditorValue(), true); |
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83 | } catch (Exception e) { |
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84 | ((JComponent) getComponent()).setBorder(new LineBorder(Color.red)); |
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85 | |||
86 | return false; |
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87 | } |
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88 | |||
89 | return super.stopCellEditing(); |
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90 | } |
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91 | |||
92 | public Component getTableCellEditorComponent( |
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93 | JTable table,
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94 | Object value,
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95 | boolean isSelected,
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96 | int row,
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97 | int column) {
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98 | this.value = null; |
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99 | ((JComponent) getComponent()).setBorder(new LineBorder(Color.black)); |
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100 | |||
101 | return super.getTableCellEditorComponent( |
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102 | table, |
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103 | format((Date) value),
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104 | isSelected, |
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105 | row, |
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106 | column); |
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107 | } |
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108 | |||
109 | private String format(Date date) { |
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110 | return (date == null) ? "" : formatter.format(date); |
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111 | } |
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112 | |||
113 | public Object getCellEditorValue() { |
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114 | return value;
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115 | } |
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116 | |||
117 | //Same formatter as used by JTable.DateRenderer. [Jon Aquino]
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118 | private DateFormat formatter = DateFormat.getDateInstance(); |
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119 | }; |
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120 | |||
121 | private boolean verbose = false; |
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122 | |||
123 | private Collection sortByComplexity(Collection patterns) { |
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124 | //Least complex to most complex. [Jon Aquino]
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125 | TreeSet sortedPatterns = new TreeSet(new Comparator() { |
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126 | public int compare(Object o1, Object o2) { |
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127 | int result = complexity(o1.toString()) - complexity(o2.toString());
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128 | if (result == 0) { |
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129 | //The two patterns have the same level of complexity.
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130 | //Sort by order of appearance (e.g. to resolve
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131 | //MM/dd/yyyy vs dd/MM/yyyy [Jon Aquino]
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132 | result = ((Pattern) o1).index - ((Pattern) o2).index; |
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133 | } |
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134 | return result;
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135 | } |
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136 | |||
137 | private TreeSet uniqueCharacters = new TreeSet(); |
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138 | |||
139 | private int complexity(String pattern) { |
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140 | uniqueCharacters.clear(); |
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141 | |||
142 | for (int i = 0; i < pattern.length(); i++) { |
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143 | if (("" + pattern.charAt(i)).trim().length() > 0) { |
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144 | uniqueCharacters.add("" + pattern.charAt(i));
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145 | } |
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146 | } |
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147 | |||
148 | return uniqueCharacters.size();
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149 | } |
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150 | }); |
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151 | sortedPatterns.addAll(patterns); |
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152 | |||
153 | return sortedPatterns;
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154 | } |
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155 | |||
156 | private Collection lenientFormatters() { |
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157 | if (lenientFormatters == null) { |
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158 | load(); |
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159 | } |
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160 | |||
161 | return lenientFormatters;
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162 | } |
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163 | |||
164 | private Collection unlenientFormatters() { |
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165 | if (unlenientFormatters == null) { |
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166 | load(); |
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167 | } |
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168 | |||
169 | return unlenientFormatters;
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170 | } |
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171 | |||
172 | /**
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173 | * @return null if s is empty
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174 | */
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175 | public Date parse(String s, boolean lenient) throws ParseException { |
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176 | if (s.trim().length() == 0) { |
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177 | return null; |
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178 | } |
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179 | //The deprecated Date#parse method is actually pretty flexible. [Jon Aquino]
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180 | try {
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181 | if (verbose) {
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182 | System.out.println(s + " -- Date constructor"); |
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183 | } |
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184 | return new Date(s); |
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185 | } catch (Exception e) { |
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186 | //Eat it. [Jon Aquino]
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187 | } |
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188 | |||
189 | try {
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190 | return parse(s, unlenientFormatters());
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191 | } catch (ParseException e) { |
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192 | if (lenient) {
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193 | return parse(s, lenientFormatters());
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194 | } |
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195 | |||
196 | throw e;
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197 | } |
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198 | } |
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199 | |||
200 | private Date parse(String s, Collection formatters) throws ParseException { |
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201 | ParseException firstParseException = null; |
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202 | |||
203 | for (Iterator i = formatters.iterator(); i.hasNext();) { |
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204 | SimpleDateFormat formatter = (SimpleDateFormat) i.next(); |
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205 | |||
206 | if (verbose) {
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207 | System.out.println(
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208 | s |
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209 | + " -- "
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210 | + formatter.toPattern() |
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211 | + (formatter.isLenient() ? "lenient" : "")); |
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212 | } |
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213 | |||
214 | try {
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215 | return parse(s, formatter);
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216 | } catch (ParseException e) { |
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217 | if (firstParseException == null) { |
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218 | firstParseException = e; |
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219 | } |
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220 | } |
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221 | } |
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222 | |||
223 | throw firstParseException;
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224 | } |
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225 | |||
226 | private Date parse(String s, SimpleDateFormat formatter) throws ParseException { |
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227 | ParsePosition pos = new ParsePosition(0); |
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228 | Date date = formatter.parse(s, pos);
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229 | |||
230 | if (pos.getIndex() == 0) { |
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231 | throw new ParseException( |
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232 | "Unparseable date: \"" + s + "\"", |
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233 | pos.getErrorIndex()); |
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234 | } |
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235 | |||
236 | //SimpleDateFormat ignores trailing characters in the pattern string that it
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237 | //doesn't need. Don't allow it to ignore any characters. [Jon Aquino]
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238 | if (pos.getIndex() != s.length()) {
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239 | throw new ParseException( |
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240 | "Unparseable date: \"" + s + "\"", |
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241 | pos.getErrorIndex()); |
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242 | } |
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243 | |||
244 | Calendar calendar = Calendar.getInstance(); |
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245 | calendar.setTime(date); |
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246 | |||
247 | if ((calendar.get(Calendar.YEAR) == 1970) && (s.indexOf("70") == -1)) { |
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248 | calendar.set(Calendar.YEAR, Calendar.getInstance().get(Calendar.YEAR)); |
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249 | } |
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250 | |||
251 | return calendar.getTime();
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252 | } |
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253 | |||
254 | private static class Pattern { |
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255 | private String pattern; |
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256 | private int index; |
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257 | public Pattern(String pattern, int index) { |
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258 | this.pattern = pattern;
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259 | this.index = index;
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260 | } |
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261 | public String toString() { |
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262 | return pattern;
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263 | } |
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264 | } |
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265 | |||
266 | private void load() { |
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267 | if (lenientFormatters == null) { |
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268 | InputStream inputStream =
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269 | getClass().getResourceAsStream("FlexibleDateParser.txt");
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270 | |||
271 | try {
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272 | try {
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273 | Collection patterns = new ArrayList(); |
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274 | int index = 0; |
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275 | for (Iterator i = FileUtil.getContents(inputStream).iterator(); |
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276 | i.hasNext(); |
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277 | ) { |
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278 | String line = ((String) i.next()).trim(); |
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279 | |||
280 | if (line.startsWith("#")) { |
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281 | continue;
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282 | } |
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283 | |||
284 | if (line.length() == 0) { |
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285 | continue;
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286 | } |
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287 | |||
288 | patterns.add(new Pattern(line, index)); |
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289 | index++; |
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290 | } |
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291 | |||
292 | unlenientFormatters = toFormatters(false, patterns);
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293 | lenientFormatters = toFormatters(true, patterns);
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294 | } finally {
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295 | inputStream.close(); |
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296 | } |
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297 | } catch (IOException e) { |
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298 | Assert.shouldNeverReachHere(e.toString()); |
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299 | } |
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300 | } |
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301 | } |
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302 | |||
303 | private Collection toFormatters(boolean lenient, Collection patterns) { |
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304 | ArrayList formatters = new ArrayList(); |
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305 | //Sort from least complex to most complex; otherwise, ddMMMyyyy
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306 | //instead of MMMd will match "May 15". [Jon Aquino]
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307 | for (Iterator i = sortByComplexity(patterns).iterator(); i.hasNext();) { |
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308 | Pattern pattern = (Pattern) i.next(); |
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309 | SimpleDateFormat formatter = new SimpleDateFormat(pattern.pattern); |
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310 | formatter.setLenient(lenient); |
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311 | formatters.add(formatter); |
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312 | } |
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313 | |||
314 | return formatters;
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315 | } |
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316 | |||
317 | public static void main(String[] args) throws Exception { |
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318 | System.out.println(DateFormat.getDateInstance().parse("03-Mar-1998")); |
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319 | } |
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320 | |||
321 | public void setVerbose(boolean b) { |
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322 | verbose = b; |
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323 | } |
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324 | } |