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annotate common-bioformats/src/main/java/digilib/image/BioFormatsDocuImage.java @ 973:55572a4bbf68

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DocuImage implementation using Bio-Formats library (doesn't work yet).
author robcast
date Thu, 26 Jan 2012 15:02:29 +0100
parents
children f34891279a6e
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973
55572a4bbf68 DocuImage implementation using Bio-Formats library (doesn't work yet).
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1 /**
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2 *
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3 */
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4 package digilib.image;
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5
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6 import java.awt.RenderingHints;
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7 import java.awt.geom.AffineTransform;
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8 import java.awt.image.AffineTransformOp;
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9 import java.awt.image.BufferedImage;
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10 import java.io.File;
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11 import java.io.FileInputStream;
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12 import java.io.IOException;
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13 import java.io.OutputStream;
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14
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15 import loci.formats.FormatException;
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16 import loci.formats.IFormatWriter;
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17 import loci.formats.ImageReader;
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18 import loci.formats.ImageWriter;
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19 import loci.formats.gui.BufferedImageReader;
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20 import loci.formats.gui.BufferedImageWriter;
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21 import loci.formats.meta.DummyMetadata;
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22 import loci.formats.meta.MetadataRetrieve;
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23
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24 import digilib.io.FileOpException;
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25 import digilib.io.ImageInput;
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26 import digilib.util.ImageSize;
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27
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28 /**
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29 * @author casties
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30 *
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31 */
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32 public class BioFormatsDocuImage extends DocuImageImpl {
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33
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34 private BufferedImage img;
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35 private Object imageSize;
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36 private RenderingHints renderHint;
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37 private ImageReader reader;
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38
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39 /*
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40 * (non-Javadoc)
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41 *
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42 * @see digilib.image.DocuImageImpl#identify(digilib.io.ImageInput)
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43 */
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44 @Override
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45 public ImageInput identify(ImageInput ii) throws IOException {
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46 ImageReader reader = new ImageReader();
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47 try {
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48 reader.setId(ii.getFile().getAbsolutePath());
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49 } catch (FormatException e) {
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50 // TODO Auto-generated catch block
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51 e.printStackTrace();
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52 }
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53 int width = reader.getSizeX();
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54 int height = reader.getSizeY();
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55 String fmt = reader.getFormat();
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56
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57 String mt = "";
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58 if (fmt.equalsIgnoreCase("Tagged Image File Format")) {
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59 mt = "image/tiff";
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60 } else if (fmt.equalsIgnoreCase("JPEG")) {
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61 mt = "image/jpeg";
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62 }
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63
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64 logger.debug("BioFormats identify: width=" + width + " height=" + height + " format=" + fmt + " mimetype=" + mt);
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65 ii.setSize(new ImageSize(width, height));
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66 ii.setMimetype(mt);
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67 return ii;
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68 }
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69
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70 @Override
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71 public void loadImage(ImageInput ii) throws FileOpException {
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72 logger.debug("loadImage: " + ii);
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73 this.input = ii;
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74 reader = new ImageReader();
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75 try {
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76 reader.setId(ii.getFile().getAbsolutePath());
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77 BufferedImageReader biReader = BufferedImageReader.makeBufferedImageReader(reader);
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78 img = biReader.openImage(0);
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79 logger.debug("image loaded: " + img);
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80 } catch (FormatException e) {
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81 throw new FileOpException("Unable to load image format: " + e);
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82 } catch (IOException e) {
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83 throw new FileOpException("Unable to load image file: " + e);
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84 }
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85 }
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86
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87 @Override
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88 public void scale(double scaleX, double scaleY) throws ImageOpException {
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89 logger.debug("scale: " + scaleX);
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90 /* for downscaling in high quality the image is blurred first */
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91 if ((scaleX <= 0.5) && (quality > 1)) {
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92 int bl = (int) Math.floor(1 / scaleX);
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93 // blur(bl);
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94 }
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95 /* then scaled */
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96 AffineTransformOp scaleOp = new AffineTransformOp(AffineTransform.getScaleInstance(scaleX, scaleY), renderHint);
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97 img = scaleOp.filter(img, null);
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98 logger.debug("scaled to " + img.getWidth() + "x" + img.getHeight() + " img=" + img);
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99 // invalidate image size
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100 imageSize = null;
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101 }
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102
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103 public void setQuality(int qual) {
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104 quality = qual;
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105 renderHint = new RenderingHints(null);
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106 // hint.put(RenderingHints.KEY_ANTIALIASING,
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107 // RenderingHints.VALUE_ANTIALIAS_OFF);
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108 // setup interpolation quality
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109 if (qual > 0) {
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110 logger.debug("quality q1");
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111 renderHint.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
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112 } else {
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113 logger.debug("quality q0");
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114 renderHint.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR);
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115 }
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116 }
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117
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118 public void crop(int x_off, int y_off, int width, int height) throws ImageOpException {
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119 // setup Crop
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120 img = img.getSubimage(x_off, y_off, width, height);
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121 logger.debug("CROP:" + img.getWidth() + "x" + img.getHeight());
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122 // invalidate image size
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123 imageSize = null;
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124 }
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125
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126 @Override
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127 public void writeImage(String mt, OutputStream ostream) throws ImageOpException, FileOpException {
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128 logger.debug("writeImage");
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129 File outFile;
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130 String filext = ".jpg";
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131 if (mt.equals("image/png")) {
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132 filext = ".png";
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133 }
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134 try {
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135 outFile = File.createTempFile("biof_temp", filext);
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136 } catch (IOException e) {
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137 throw new FileOpException(e.toString());
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138 }
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139 // save image to file
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140 ImageWriter iw = new ImageWriter();
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141 /*
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142 * try { //iw.setMetadataRetrieve(new DummyMetadata());
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143 * //iw.setSeries(0); //iw.setId(outFile.getAbsolutePath());
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144 * //logger.debug("writer="+iw); } catch (FormatException e) { throw new
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145 * FileOpException(e.toString()); } catch (IOException e) { // TODO
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146 * Auto-generated catch block e.printStackTrace(); } /* if
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147 * (mt.endsWith("png")) { iw = }
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148 */
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149 BufferedImageWriter writer = BufferedImageWriter.makeBufferedImageWriter(iw);
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150 try {
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151 logger.debug("setting metadata");
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152 iw.setMetadataRetrieve((MetadataRetrieve) reader.getMetadataStore());
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153 logger.debug("writing to file " + outFile);
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154 writer.setId(outFile.getAbsolutePath());
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155 logger.debug("saving image " + img);
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156 writer.saveImage(0, img);
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157 logger.debug("closing file");
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158 writer.close();
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159 } catch (FormatException e1) {
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160 // TODO Auto-generated catch block
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161 e1.printStackTrace();
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162 } catch (IOException e1) {
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163 // TODO Auto-generated catch block
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164 e1.printStackTrace();
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165 }
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166 // now send file
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167 FileInputStream inFile = null;
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168 try {
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169 inFile = new FileInputStream(outFile);
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170 byte dataBuffer[] = new byte[4096];
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171 int len;
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172 while ((len = inFile.read(dataBuffer)) != -1) {
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173 // copy out file
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174 ostream.write(dataBuffer, 0, len);
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175 }
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176 } catch (IOException e) {
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177 throw new FileOpException(e.toString());
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178 } finally {
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179 try {
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180 if (inFile != null) {
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181 inFile.close();
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182 }
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183 } catch (IOException e) {
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184 // nothing to do
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185 }
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186 }
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187
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188 }
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189
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190 }