Mercurial > hg > digilib-old

annotate common/src/main/java/digilib/io/ImageSet.java @ 903:7779b37d1d05

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refactored into maven modules per servlet type. can build servlet-api 2.3 and 3.0 via profile now!
author robcast
date Tue, 26 Apr 2011 20:24:31 +0200
parents servlet/src/main/java/digilib/io/ImageSet.java@ba1eb2d821a2
children
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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.util.ArrayList;
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21 import java.util.List;
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22 import java.util.ListIterator;
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23
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24 import digilib.util.ImageSize;
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25
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26 /**
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27 * @author casties
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28 */
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29 public class ImageSet {
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30
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31 /** list of files (ImageFile) */
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32 protected List<ImageInput> list = null;
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33
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34 /** aspect ratio (width/height) */
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35 protected float aspect = 0f;
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36
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37 /** resolution of the biggest image (DPI) */
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38 protected float resX = 0f;
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39
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40 /** resolution of the biggest image (DPI) */
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41 protected float resY = 0f;
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42
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43 /**
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44 * Creator for empty fileset.
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45 *
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46 *
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47 * @param initialCapacity
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48 */
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49 public ImageSet() {
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50 list = new ArrayList<ImageInput>();
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51 }
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52
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53 /**
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54 * The number of image files in this Fileset.
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55 *
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56 *
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57 * @return number of image files
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58 */
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59 public int size() {
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60 return (list != null) ? list.size() : 0;
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61 }
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62
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63 /**
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64 * Gets the default Input.
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65 *
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66 */
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67 public ImageInput get() {
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68 return (list != null) ? list.get(0) : null;
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69 }
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70
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71 /**
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72 * Get the ImageFile at the index.
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73 *
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74 *
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75 * @param index
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76 * @return
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77 */
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78 public ImageInput get(int index) {
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79 return list.get(index);
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80 }
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81
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82 /**
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83 * Get the next smaller ImageFile than the given size.
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84 *
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85 * Returns the ImageFile from the set that has a width and height smaller or
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86 * equal the given size. Returns null if there isn't any smaller image.
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87 *
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88 * @param size
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89 * @param info
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90 * @return
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91 */
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92 public ImageInput getNextSmaller(ImageSize size) {
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93 for (ListIterator<ImageInput> i = getHiresIterator(); i.hasNext();) {
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94 ImageInput f = i.next();
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95 ImageSize is = f.getSize();
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96 if (is != null && is.isTotallySmallerThan(size)) {
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97 return f;
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98 }
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99 }
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100 return null;
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101 }
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102
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103 /**
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104 * Get the next bigger ImageFile than the given size.
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105 *
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106 * Returns the ImageFile from the set that has a width or height bigger or
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107 * equal the given size. Returns null if there isn't any bigger image.
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108 *
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109 * @param size
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110 * @param info
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111 * @return
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112 */
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113 public ImageInput getNextBigger(ImageSize size) {
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114 for (ListIterator<ImageInput> i = getLoresIterator(); i.hasPrevious();) {
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115 ImageInput f = i.previous();
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116 ImageSize is = f.getSize();
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117 if (is != null && is.isBiggerThan(size)) {
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118 return f;
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119 }
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120 }
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121 return null;
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122 }
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123
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124 /**
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125 * Returns the biggest ImageFile in the set.
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126 *
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127 *
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128 * @return
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129 */
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130 public ImageInput getBiggest() {
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131 return this.get(0);
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132 }
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133
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134 /**
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135 * Returns the biggest ImageFile in the set.
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136 *
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137 *
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138 * @return
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139 */
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140 public ImageInput getSmallest() {
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141 return this.get(this.size() - 1);
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142 }
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143
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144 /**
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145 * Get an Iterator for this Fileset starting at the highest resolution
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146 * images.
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147 *
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148 *
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149 * @return
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150 */
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151 public ListIterator<ImageInput> getHiresIterator() {
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152 return list.listIterator();
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153 }
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154
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155 /**
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156 * Get an Iterator for this Fileset starting at the lowest resolution
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157 * images.
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158 *
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159 * The Iterator starts at the last element, so you have to use it backwards
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160 * with hasPrevious() and previous().
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161 *
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162 *
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163 * @return
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164 */
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165 public ListIterator<ImageInput> getLoresIterator() {
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166 return list.listIterator(list.size());
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167 }
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168
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169 /**
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170 * @return
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171 */
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172 public float getResX() {
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173 return resX;
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174 }
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175
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176 /**
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177 * @return
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178 */
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179 public float getResY() {
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180 return resY;
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181 }
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182
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183 /**
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184 * Sets the aspect ratio from an ImageSize.
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185 *
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186 *
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187 * @param f
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188 */
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189 public void setAspect(ImageSize s) {
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190 aspect = s.getAspect();
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191 }
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192
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193 /**
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194 * Returns the aspect ratio.
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195 *
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196 * Aspect ratio is (width/height). So it's <1 for portrait and >1 for
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197 * landscape.
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198 *
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199 *
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200 * @return
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201 */
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202 public float getAspect() {
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203 return aspect;
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204 }
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205
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206 public void checkMeta() {
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207 // TODO Auto-generated method stub
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208
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209 }
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210
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211 }