svn-gvsig-desktop / tags / gvSIGv0_6_1RELEASE / libraries / libFMap / src / com / iver / cit / gvsig / fmap / drivers / shp / DbaseFileWriterNIO.java @ 5222
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1 | 377 | fjp | /*
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2 | * Geotools - OpenSource mapping toolkit
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3 | * (C) 2002, Centre for Computational Geography
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4 | *
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5 | * This library is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU Lesser General Public
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7 | * License as published by the Free Software Foundation;
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8 | * version 2.1 of the License.
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9 | *
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10 | * This library is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 | * Lesser General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU Lesser General Public
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16 | * License along with this library; if not, write to the Free Software
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17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 | *
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19 | * This file is based on an origional contained in the GISToolkit project:
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20 | * http://gistoolkit.sourceforge.net/
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21 | *
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22 | */
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23 | 1100 | fjp | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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24 | *
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25 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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26 | *
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27 | * This program is free software; you can redistribute it and/or
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28 | * modify it under the terms of the GNU General Public License
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29 | * as published by the Free Software Foundation; either version 2
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30 | * of the License, or (at your option) any later version.
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31 | *
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32 | * This program is distributed in the hope that it will be useful,
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33 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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34 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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35 | * GNU General Public License for more details.
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36 | *
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37 | * You should have received a copy of the GNU General Public License
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38 | * along with this program; if not, write to the Free Software
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39 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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40 | *
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41 | * For more information, contact:
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42 | *
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43 | * Generalitat Valenciana
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44 | * Conselleria d'Infraestructures i Transport
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45 | * Av. Blasco Ib??ez, 50
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46 | * 46010 VALENCIA
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47 | * SPAIN
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48 | *
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49 | * +34 963862235
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50 | * gvsig@gva.es
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51 | * www.gvsig.gva.es
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52 | *
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53 | * or
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54 | *
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55 | * IVER T.I. S.A
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56 | * Salamanca 50
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57 | * 46005 Valencia
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58 | * Spain
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59 | *
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60 | * +34 963163400
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61 | * dac@iver.es
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62 | */
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63 | 377 | fjp | package com.iver.cit.gvsig.fmap.drivers.shp; |
64 | |||
65 | import java.io.*; |
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66 | import java.nio.channels.*; |
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67 | import java.nio.*; |
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68 | import java.text.*; |
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69 | import org.geotools.resources.NIOUtilities; |
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70 | |||
71 | 2578 | caballero | import com.hardcode.gdbms.engine.values.BooleanValue; |
72 | import com.hardcode.gdbms.engine.values.DateValue; |
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73 | import com.hardcode.gdbms.engine.values.DoubleValue; |
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74 | 2581 | fernando | import com.hardcode.gdbms.engine.values.NullValue; |
75 | 4227 | ldiaz | import com.hardcode.gdbms.engine.values.NumericValue; |
76 | 2578 | caballero | import com.hardcode.gdbms.engine.values.StringValue; |
77 | |||
78 | 377 | fjp | import java.util.*; |
79 | |||
80 | |||
81 | /** A DbaseFileReader is used to read a dbase III format file.
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82 | * The general use of this class is:
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83 | * <CODE><PRE>
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84 | * DbaseFileHeader header = ...
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85 | * WritableFileChannel out = new FileOutputStream("thefile.dbf").getChannel();
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86 | * DbaseFileWriter w = new DbaseFileWriter(header,out);
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87 | * while ( moreRecords ) {
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88 | * w.write( getMyRecord() );
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89 | * }
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90 | * w.close();
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91 | * </PRE></CODE>
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92 | * You must supply the <CODE>moreRecords</CODE> and <CODE>getMyRecord()</CODE>
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93 | * logic...
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94 | * @author Ian Schneider
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95 | */
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96 | public class DbaseFileWriterNIO { |
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97 | |||
98 | private DbaseFileHeaderNIO header;
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99 | private DbaseFileWriterNIO.FieldFormatter formatter = new DbaseFileWriterNIO.FieldFormatter(); |
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100 | WritableByteChannel channel;
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101 | private ByteBuffer buffer; |
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102 | private final Number NULL_NUMBER = new Integer(0); |
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103 | private final String NULL_STRING = ""; |
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104 | 3285 | fjp | private final String NULL_DATE = " "; |
105 | 377 | fjp | |
106 | /** Create a DbaseFileWriter using the specified header and writing to the given
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107 | * channel.
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108 | * @param header The DbaseFileHeader to write.
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109 | * @param out The Channel to write to.
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110 | * @throws IOException If errors occur while initializing.
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111 | */
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112 | 4227 | ldiaz | public DbaseFileWriterNIO(DbaseFileHeaderNIO header,FileChannel out) throws IOException { |
113 | 377 | fjp | header.writeHeader(out); |
114 | this.header = header;
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115 | this.channel = out;
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116 | |||
117 | init(); |
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118 | } |
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119 | |||
120 | private void init() throws IOException { |
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121 | buffer = ByteBuffer.allocateDirect(header.getRecordLength());
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122 | } |
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123 | |||
124 | private void write() throws IOException { |
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125 | buffer.position(0);
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126 | int r = buffer.remaining();
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127 | while ( (r -= channel.write(buffer)) > 0) { |
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128 | ; // do nothing
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129 | } |
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130 | } |
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131 | |||
132 | |||
133 | /** Write a single dbase record.
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134 | * @param record The entries to write.
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135 | * @throws IOException If IO error occurs.
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136 | * @throws DbaseFileException If the entry doesn't comply to the header.
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137 | */
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138 | public void write(Object[] record) throws IOException{ |
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139 | /*
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140 | if (record.length != header.getNumFields()) {
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141 | throw new DbaseFileException("Wrong number of fields " + record.length +
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142 | " expected " + header.getNumFields());
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143 | }
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144 | */
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145 | buffer.position(0);
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146 | |||
147 | // put the 'not-deleted' marker
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148 | buffer.put( (byte) ' '); |
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149 | |||
150 | for (int i = 0; i < header.getNumFields(); i++) { |
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151 | String fieldString = fieldString(record[i], i);
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152 | // if ( header.getFieldLength(i) != fieldString.getBytes().length) {
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153 | // System.out.println(i + " : " + header.getFieldName(i));
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154 | // }
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155 | |||
156 | |||
157 | buffer.put(fieldString.getBytes()); |
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158 | |||
159 | } |
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160 | |||
161 | |||
162 | write(); |
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163 | } |
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164 | |||
165 | private String fieldString(Object obj,final int col) { |
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166 | String o;
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167 | final int fieldLen = header.getFieldLength(col); |
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168 | switch (header.getFieldType(col)) {
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169 | case 'C': |
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170 | case 'c': |
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171 | o = formatter.getFieldString( |
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172 | fieldLen, |
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173 | 2581 | fernando | (obj instanceof NullValue)? NULL_STRING : ((StringValue) obj).getValue()
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174 | 377 | fjp | ); |
175 | break;
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176 | case 'L': |
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177 | case 'l': |
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178 | 2581 | fernando | o = (obj instanceof NullValue) ? "F" : ((BooleanValue)obj).getValue() == true ? "T" : "F"; |
179 | 377 | fjp | break;
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180 | case 'M': |
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181 | case 'G': |
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182 | o = formatter.getFieldString( |
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183 | fieldLen, |
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184 | 2581 | fernando | (obj instanceof NullValue) ? NULL_STRING : ((StringValue) obj).getValue()
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185 | 377 | fjp | ); |
186 | break;
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187 | 1132 | vcaballero | /* case 'N':
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188 | 377 | fjp | case 'n':
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189 | // int?
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190 | if (header.getFieldDecimalCount(col) == 0) {
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191 | |||
192 | o = formatter.getFieldString(
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193 | 1132 | vcaballero | fieldLen, 0, (Number) (obj == null ? NULL_NUMBER : Double.valueOf(obj.toString()))
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194 | 377 | fjp | );
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195 | break;
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196 | 1132 | vcaballero | |
197 | }
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198 | */
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199 | case 'N': |
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200 | case 'n': |
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201 | 377 | fjp | case 'F': |
202 | case 'f': |
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203 | 4227 | ldiaz | Number number = null; |
204 | if(obj instanceof NullValue){ |
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205 | number = NULL_NUMBER; |
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206 | }else{
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207 | NumericValue gVal = (NumericValue) obj; |
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208 | number = new Double(gVal.doubleValue()); |
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209 | } |
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210 | 377 | fjp | o = formatter.getFieldString(fieldLen, |
211 | 4227 | ldiaz | header.getFieldDecimalCount(col), |
212 | number); |
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213 | 377 | fjp | break;
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214 | case 'D': |
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215 | case 'd': |
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216 | 3285 | fjp | if (obj instanceof NullValue) |
217 | o = NULL_DATE; |
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218 | else
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219 | o = formatter.getFieldString(((DateValue)obj).getValue()); |
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220 | 377 | fjp | break;
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221 | default:
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222 | throw new RuntimeException("Unknown type " + header.getFieldType(col)); |
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223 | } |
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224 | |||
225 | return o;
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226 | } |
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227 | |||
228 | /** Release resources associated with this writer.
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229 | * <B>Highly recommended</B>
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230 | * @throws IOException If errors occur.
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231 | */
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232 | public void close() throws IOException { |
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233 | // IANS - GEOT 193, bogus 0x00 written. According to dbf spec, optional
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234 | // eof 0x1a marker is, well, optional. Since the original code wrote a
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235 | // 0x00 (which is wrong anyway) lets just do away with this :)
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236 | // - produced dbf works in OpenOffice and ArcExplorer java, so it must
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237 | // be okay.
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238 | // buffer.position(0);
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239 | // buffer.put((byte) 0).position(0).limit(1);
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240 | // write();
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241 | channel.close(); |
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242 | if (buffer instanceof MappedByteBuffer) { |
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243 | // NIOUtilities.clean(buffer);
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244 | } |
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245 | |||
246 | buffer = null;
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247 | channel = null;
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248 | formatter = null;
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249 | } |
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250 | |||
251 | |||
252 | /** Utility for formatting Dbase fields. */
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253 | public static class FieldFormatter { |
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254 | private StringBuffer buffer = new StringBuffer(255); |
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255 | private NumberFormat numFormat = NumberFormat.getNumberInstance(Locale.US); |
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256 | private Calendar calendar = Calendar.getInstance(Locale.US); |
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257 | private String emtpyString; |
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258 | private static final int MAXCHARS = 255; |
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259 | |||
260 | public FieldFormatter() {
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261 | // Avoid grouping on number format
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262 | numFormat.setGroupingUsed(false);
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263 | |||
264 | // build a 255 white spaces string
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265 | StringBuffer sb = new StringBuffer(MAXCHARS); |
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266 | sb.setLength(MAXCHARS); |
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267 | for(int i = 0; i < MAXCHARS; i++) { |
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268 | sb.setCharAt(i, ' ');
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269 | } |
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270 | |||
271 | emtpyString = sb.toString(); |
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272 | } |
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273 | |||
274 | public String getFieldString(int size, String s) { |
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275 | buffer.replace(0, size, emtpyString);
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276 | buffer.setLength(size); |
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277 | |||
278 | if(s != null) { |
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279 | buffer.replace(0, size, s);
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280 | if(s.length() <= size) {
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281 | for(int i = s.length(); i < size; i++) { |
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282 | buffer.append(' ');
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283 | } |
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284 | } |
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285 | } |
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286 | |||
287 | buffer.setLength(size); |
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288 | return buffer.toString();
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289 | } |
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290 | |||
291 | public String getFieldString(Date d) { |
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292 | |||
293 | if(d != null) { |
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294 | buffer.delete(0, buffer.length());
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295 | |||
296 | calendar.setTime(d); |
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297 | int year = calendar.get(Calendar.YEAR); |
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298 | int month = calendar.get(Calendar.MONTH) + 1; // returns 0 based month? |
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299 | int day = calendar.get(Calendar.DAY_OF_MONTH); |
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300 | |||
301 | if(year < 1000) { |
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302 | if(year >= 100) { |
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303 | buffer.append("0");
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304 | } else if(year >= 10) { |
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305 | buffer.append("00");
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306 | } else {
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307 | buffer.append("000");
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308 | } |
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309 | } |
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310 | buffer.append(year); |
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311 | |||
312 | if(month < 10) { |
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313 | buffer.append("0");
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314 | } |
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315 | buffer.append(month); |
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316 | |||
317 | if(day < 10) { |
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318 | buffer.append("0");
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319 | } |
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320 | buffer.append(day); |
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321 | } else {
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322 | buffer.setLength(8);
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323 | buffer.replace(0, 8, emtpyString); |
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324 | } |
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325 | |||
326 | buffer.setLength(8);
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327 | return buffer.toString();
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328 | } |
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329 | |||
330 | public String getFieldString(int size, int decimalPlaces, Number n) { |
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331 | buffer.delete(0, buffer.length());
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332 | |||
333 | if (n != null) { |
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334 | numFormat.setMaximumFractionDigits(decimalPlaces); |
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335 | numFormat.setMinimumFractionDigits(decimalPlaces); |
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336 | numFormat.format(n, buffer, new FieldPosition(NumberFormat.INTEGER_FIELD)); |
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337 | } |
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338 | |||
339 | int diff = size - buffer.length();
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340 | if (diff >= 0) { |
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341 | while (diff-- > 0) { |
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342 | buffer.insert(0, ' '); |
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343 | } |
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344 | } else {
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345 | buffer.setLength(size); |
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346 | } |
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347 | return buffer.toString();
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348 | } |
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349 | } |
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350 | |||
351 | |||
352 | } |