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annotate servlet/src/digilib/io/ImageSet.java @ 576:dad720e9b12b stream

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try: DocuDirent as interface, ImageFile inherits from ImageInput and implements DocuDirent
author robcast
date Wed, 22 Dec 2010 20:19:06 +0100
parents 790cbfb58b52
children bb8dfc05674f
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1 /* ImageSet -- digilib image file info class.
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2 * Digital Image Library servlet components
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3 * Copyright (C) 2003 Robert Casties (robcast@mail.berlios.de)
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4 *
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5 * This program is free software; you can
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6 * redistribute it and/or modify it under the terms of the GNU General Public
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7 * License as published by the Free Software Foundation; either version 2 of
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8 * the License, or (at your option) any later version.
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9 *
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10 * Please read license.txt for the full details. A copy of the GPL may be
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11 * found at http://www.gnu.org/copyleft/lgpl.html
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12 *
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13 * You should have received a copy of the GNU General Public License along
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14 * with this program; if not, write to the Free Software Foundation, Inc.,
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15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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16 */
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17
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18 package digilib.io;
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19
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20 import java.io.IOException;
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21 import java.util.ArrayList;
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22 import java.util.List;
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23 import java.util.ListIterator;
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24
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25 import digilib.image.ImageSize;
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26 import digilib.servlet.DigilibConfiguration;
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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 public class ImageSet {
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32
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33 /** list of files (ImageFile) */
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34 protected List<ImageInput> list = null;
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35
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36 /** aspect ratio (width/height) */
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37 protected float aspect = 0f;
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38
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39 /** resolution of the biggest image (DPI) */
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40 protected float resX = 0f;
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41
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42 /** resolution of the biggest image (DPI) */
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43 protected float resY = 0f;
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44
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45 /**
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46 * Creator for empty fileset.
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47 *
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48 *
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49 * @param initialCapacity
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50 */
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51 public ImageSet() {
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52 list = new ArrayList<ImageInput>();
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53 }
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54
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55 /**
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56 * The number of image files in this Fileset.
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57 *
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58 *
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59 * @return number of image files
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60 */
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61 public int size() {
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62 return (list != null) ? list.size() : 0;
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63 }
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64
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65 /**
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66 * Gets the default Input.
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67 *
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68 */
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69 public ImageInput get() {
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70 return (list != null) ? list.get(0) : null;
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71 }
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72
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73 /**
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74 * Get the ImageFile at the index.
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75 *
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76 *
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77 * @param index
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78 * @return
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79 */
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80 public ImageInput get(int index) {
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81 return list.get(index);
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82 }
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83
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84 /**
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85 * Get the next smaller ImageFile than the given size.
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86 *
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87 * Returns the ImageFile from the set that has a width and height smaller or
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88 * equal the given size. Returns null if there isn't any smaller image.
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89 * Needs DocuInfo instance to checkFile().
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90 *
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91 *
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92 * @param size
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93 * @param info
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94 * @return
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95 */
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96 public ImageInput getNextSmaller(ImageSize size) {
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97 for (ListIterator<ImageInput> i = getHiresIterator(); i.hasNext();) {
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98 ImageInput f = i.next();
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99 try {
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100 if (!f.isChecked()) {
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101 DigilibConfiguration.docuImageIdentify((ImageFile) f); // FIXME: cast to file?
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102 }
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103 if (f.getSize().isTotallySmallerThan(size)) {
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104 return f;
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105 }
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106 } catch (IOException e) {
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107 }
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108 }
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109 return null;
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110 }
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111
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112 /**
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113 * Get the next bigger ImageFile than the given size.
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114 *
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115 * Returns the ImageFile from the set that has a width or height bigger or
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116 * equal the given size. Returns null if there isn't any bigger image. Needs
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117 * DocuInfo instance to checkFile().
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118 *
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119 *
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120 * @param size
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121 * @param info
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122 * @return
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123 */
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124 public ImageInput getNextBigger(ImageSize size) {
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125 for (ListIterator<ImageInput> i = getLoresIterator(); i.hasPrevious();) {
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126 ImageInput f = i.previous();
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127 try {
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128 if (!f.isChecked()) {
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129 DigilibConfiguration.docuImageIdentify((ImageFile) f); // FIXME: cast to file?
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130 }
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131 if (f.getSize().isBiggerThan(size)) {
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132 return f;
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133 }
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134 } catch (IOException e) {
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135 }
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136 }
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137 return null;
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138 }
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139
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140 /**
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141 * Returns the biggest ImageFile in the set.
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142 *
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143 *
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144 * @return
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145 */
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146 public ImageInput getBiggest() {
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147 return this.get(0);
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148 }
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149
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150 /**
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151 * Returns the biggest ImageFile in the set.
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152 *
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153 *
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154 * @return
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155 */
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156 public ImageInput getSmallest() {
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157 return this.get(this.size() - 1);
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158 }
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160 /**
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161 * Get an Iterator for this Fileset starting at the highest resolution
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162 * images.
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163 *
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164 *
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165 * @return
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166 */
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167 public ListIterator<ImageInput> getHiresIterator() {
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168 return list.listIterator();
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169 }
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170
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171 /**
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172 * Get an Iterator for this Fileset starting at the lowest resolution
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173 * images.
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174 *
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175 * The Iterator starts at the last element, so you have to use it backwards
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176 * with hasPrevious() and previous().
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177 *
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178 *
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179 * @return
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180 */
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181 public ListIterator<ImageInput> getLoresIterator() {
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182 return list.listIterator(list.size());
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183 }
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184
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185 /**
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186 * @return
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187 */
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188 public float getResX() {
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189 return resX;
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190 }
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191
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192 /**
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193 * @return
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194 */
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195 public float getResY() {
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196 return resY;
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197 }
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198
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199 /**
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200 * Sets the aspect ratio from an ImageSize.
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201 *
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202 *
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203 * @param f
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204 */
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205 public void setAspect(ImageSize s) {
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206 aspect = s.getAspect();
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207 }
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208
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209 /**
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210 * Returns the aspect ratio.
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211 *
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212 * Aspect ratio is (width/height). So it's <1 for portrait and >1 for
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213 * landscape.
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214 *
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215 *
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216 * @return
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217 */
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218 public float getAspect() {
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219 return aspect;
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220 }
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221
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222 public void checkMeta() {
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223 // TODO Auto-generated method stub
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224
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225 }
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226
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227 }