Mercurial > hg > digilib-old
annotate servlet/src/digilib/io/DocuFileset.java @ 139:11cfe4c89fdc
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- fixed lots of bugs in metadata handling.
| author | robcast |
|---|---|
| date | Thu, 31 Jul 2003 20:56:51 +0200 |
| parents | c36944be0b58 |
| children | bdd6789d21e0 |
| rev | line source |
|---|---|
| 86 | 1 /* DocuFileset -- digilib image file info class. |
| 2 | |
| 3 Digital Image Library servlet components | |
| 4 | |
| 5 Copyright (C) 2003 Robert Casties (robcast@mail.berlios.de) | |
| 6 | |
| 7 This program is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2 of the License, or (at your | |
| 10 option) any later version. | |
| 11 | |
| 12 Please read license.txt for the full details. A copy of the GPL | |
| 13 may be found at http://www.gnu.org/copyleft/lgpl.html | |
| 14 | |
| 15 You should have received a copy of the GNU General Public License | |
| 16 along with this program; if not, write to the Free Software | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 */ | |
| 20 package digilib.io; | |
| 21 | |
| 122 | 22 import java.awt.Dimension; |
| 130 | 23 import java.io.File; |
| 91 | 24 import java.util.ArrayList; |
| 25 import java.util.HashMap; | |
| 122 | 26 import java.util.Iterator; |
| 91 | 27 import java.util.ListIterator; |
| 86 | 28 |
| 122 | 29 import digilib.image.DocuInfo; |
| 30 | |
| 86 | 31 /** |
| 32 * @author casties | |
| 33 */ | |
| 91 | 34 public class DocuFileset { |
| 86 | 35 |
| 130 | 36 // list of files (DocuFile) |
| 91 | 37 private ArrayList list = null; |
| 86 | 38 // metadata |
| 91 | 39 private HashMap fileMeta = null; |
| 130 | 40 // metadata has been checked |
| 41 private boolean metaChecked = false; | |
| 42 // resolution (DPI) | |
| 43 private double resX = 0; | |
| 44 private double resY = 0; | |
| 86 | 45 // parent directory |
| 46 private DocuDirectory parent = null; | |
| 47 | |
| 91 | 48 /* |
| 49 * constructors | |
| 50 */ | |
| 86 | 51 |
| 52 public DocuFileset(int initialCapacity) { | |
| 91 | 53 list = new ArrayList(initialCapacity); |
| 86 | 54 } |
| 55 | |
| 91 | 56 /* |
| 57 * other stuff | |
| 58 */ | |
| 59 | |
| 60 /** Adds a DocuFile to this Fileset. | |
| 61 * | |
| 122 | 62 * The files should be added in the order of higher to lower resolutions. |
| 63 * The first file is considered the hires "original". | |
| 91 | 64 * |
| 65 * @param f file to add | |
| 66 * @return true (always) | |
| 67 */ | |
| 68 public boolean add(DocuFile f) { | |
| 69 f.setParent(this); | |
| 70 return list.add(f); | |
| 86 | 71 } |
| 122 | 72 |
| 91 | 73 /** The number of image files in this Fileset. |
| 74 * | |
| 75 * @return number of image files | |
| 76 */ | |
| 77 public int size() { | |
| 78 return (list != null) ? list.size() : 0; | |
| 79 } | |
| 122 | 80 |
| 91 | 81 /** Get the DocuFile at the index. |
| 82 * | |
| 83 * @param index | |
| 84 * @return | |
| 86 | 85 */ |
| 91 | 86 public DocuFile get(int index) { |
| 87 return (DocuFile) list.get(index); | |
| 88 } | |
| 122 | 89 |
| 90 /** Get the next smaller DocuFile than the given size. | |
| 91 * | |
| 92 * Returns the DocuFile from the set that has a width and height | |
| 93 * smaller or equal the given size. | |
| 94 * Returns null if there isn't any smaller image. | |
| 95 * Needs DocuInfo instance to checkFile(). | |
| 96 * | |
| 97 * @param size | |
| 98 * @param info | |
| 99 * @return | |
| 100 */ | |
| 101 public DocuFile getNextSmaller(Dimension size, DocuInfo info) { | |
| 102 for (Iterator i = getHiresIterator(); i.hasNext();) { | |
| 103 DocuFile f = (DocuFile) i.next(); | |
| 104 if (!f.isChecked()) { | |
| 105 f.check(info); | |
| 106 } | |
| 107 if ((f.getSize().getHeight() <= size.getHeight()) | |
| 108 && (f.getSize().getWidth() <= size.getWidth())) { | |
| 109 return f; | |
| 110 } | |
| 111 } | |
| 112 return null; | |
| 113 } | |
| 114 | |
| 115 /** Get the next bigger DocuFile than the given size. | |
| 116 * | |
| 117 * Returns the DocuFile from the set that has a width and height | |
| 118 * bigger or equal the given size. | |
| 119 * Returns null if there isn't any bigger image. | |
| 120 * Needs DocuInfo instance to checkFile(). | |
| 121 * | |
| 122 * @param size | |
| 123 * @param info | |
| 124 * @return | |
| 125 */ | |
| 126 public DocuFile getNextBigger(Dimension size, DocuInfo info) { | |
| 127 for (ListIterator i = getLoresIterator(); i.hasPrevious();) { | |
| 128 DocuFile f = (DocuFile) i.previous(); | |
| 129 if (!f.isChecked()) { | |
| 130 f.check(info); | |
| 131 } | |
| 132 if ((f.getSize().getHeight() >= size.getHeight()) | |
| 133 && (f.getSize().getWidth() >= size.getWidth())) { | |
| 134 return f; | |
| 135 } | |
| 136 } | |
| 137 return null; | |
| 138 } | |
| 139 | |
| 91 | 140 /** Get an Iterator for this Fileset starting at the highest resolution |
| 141 * images. | |
| 142 * | |
| 143 * @return | |
| 144 */ | |
| 145 public ListIterator getHiresIterator() { | |
| 146 return list.listIterator(); | |
| 86 | 147 } |
| 122 | 148 |
| 91 | 149 /** Get an Iterator for this Fileset starting at the lowest resolution |
| 150 * images. | |
| 151 * | |
| 152 * The Iterator starts at the last element, so you have to use it backwards | |
| 153 * with hasPrevious() and previous(). | |
| 154 * | |
| 155 * @return | |
| 156 */ | |
| 157 public ListIterator getLoresIterator() { | |
| 158 return list.listIterator(list.size()); | |
| 159 } | |
| 122 | 160 |
| 91 | 161 /** Reads meta-data for this Fileset if there is any. |
| 130 | 162 * |
| 163 */ | |
| 164 public void readMeta() { | |
| 165 if ((fileMeta != null) || list.isEmpty()) { | |
| 166 // there is already metadata or there's no file | |
| 167 return; | |
| 168 } | |
| 169 // metadata is in the file {filename}.meta | |
| 170 String fn = ((DocuFile) list.get(0)).getFile().getAbsolutePath(); | |
| 171 File mf = new File(fn + ".meta"); | |
| 172 if (mf.canRead()) { | |
| 173 XMLMetaLoader ml = new XMLMetaLoader(); | |
| 174 try { | |
| 175 // read meta file | |
| 176 HashMap meta = ml.loadURL(mf.getAbsolutePath()); | |
| 177 if (meta == null) { | |
| 178 return; | |
| 179 } | |
| 180 fileMeta = (HashMap) meta.get(getName()); | |
| 181 } catch (Exception e) { | |
| 182 // TODO Auto-generated catch block | |
| 183 e.printStackTrace(); | |
| 184 } | |
| 185 } | |
| 186 } | |
| 187 | |
| 188 /** Checks metadata and sets resolution in resX and resY. | |
| 189 * | |
| 91 | 190 */ |
| 191 public void checkMeta() { | |
| 130 | 192 if (metaChecked) { |
| 193 return; | |
| 194 } | |
| 195 if (fileMeta == null) { | |
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196 // try to read metadata file |
| 130 | 197 readMeta(); |
| 198 if (fileMeta == null) { | |
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199 // try directory metadata |
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200 if (parent.getDirMeta() != null) { |
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201 fileMeta = parent.getDirMeta(); |
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202 } else { |
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203 // no metadata available |
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204 metaChecked = true; |
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205 return; |
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206 } |
| 130 | 207 } |
| 208 } | |
| 209 metaChecked = true; | |
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210 String s; |
| 130 | 211 double dpi = 0; |
| 212 double dpix = 0; | |
| 213 double dpiy = 0; | |
| 214 double sizex = 0; | |
| 215 double sizey = 0; | |
| 216 double pixx = 0; | |
| 217 double pixy = 0; | |
| 218 // DPI is valid for X and Y | |
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219 if (fileMeta.containsKey("original-dpi")) { |
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220 try { |
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221 dpi = Double.parseDouble((String) fileMeta.get("original-dpi")); |
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222 } catch (NumberFormatException e) { |
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223 } |
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224 if (dpi != 0) { |
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225 resX = dpi; |
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226 resY = dpi; |
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227 return; |
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228 } |
| 130 | 229 } |
| 230 // DPI-X and DPI-Y | |
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231 if (fileMeta.containsKey("original-dpi-x") |
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232 && fileMeta.containsKey("original-dpi-y")) { |
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233 try { |
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234 dpix = |
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235 Double.parseDouble((String) fileMeta.get("original-dpi-x")); |
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236 dpiy = |
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237 Double.parseDouble((String) fileMeta.get("original-dpi-y")); |
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238 } catch (NumberFormatException e) { |
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239 } |
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240 if ((dpix != 0) && (dpiy != 0)) { |
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241 resX = dpix; |
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242 resY = dpiy; |
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243 return; |
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244 } |
| 130 | 245 } |
| 246 // SIZE-X and SIZE-Y and PIXEL-X and PIXEL-Y | |
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247 if (fileMeta.containsKey("original-size-x") |
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248 && fileMeta.containsKey("original-size-y") |
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249 && fileMeta.containsKey("original-pixel-x") |
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250 && fileMeta.containsKey("original-pixel-y")) { |
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251 try { |
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252 sizex = |
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253 Double.parseDouble( |
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254 (String) fileMeta.get("original-size-x")); |
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255 sizey = |
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256 Double.parseDouble( |
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257 (String) fileMeta.get("original-size-y")); |
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258 pixx = |
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259 Double.parseDouble( |
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260 (String) fileMeta.get("original-pixel-x")); |
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261 pixy = |
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262 Double.parseDouble( |
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263 (String) fileMeta.get("original-pixel-y")); |
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264 } catch (NumberFormatException e) { |
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265 } |
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266 if ((sizex != 0) && (sizey != 0) && (pixx != 0) && (pixy != 0)) { |
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267 resX = pixx / (sizex * 100 / 2.54); |
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268 resY = pixy / (sizey * 100 / 2.54); |
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269 return; |
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270 } |
| 130 | 271 } |
| 86 | 272 } |
| 273 | |
| 130 | 274 /** The name of the (hires) image file. |
| 91 | 275 * |
| 276 * @return | |
| 277 */ | |
| 86 | 278 public String getName() { |
| 91 | 279 if (!list.isEmpty()) { |
| 280 return ((DocuFile) list.get(0)).getName(); | |
| 86 | 281 } |
| 282 return null; | |
| 283 } | |
| 122 | 284 |
| 91 | 285 /** Returns the parent DocuDirectory. |
| 130 | 286 * |
| 86 | 287 * @return DocuDirectory |
| 288 */ | |
| 289 public DocuDirectory getParent() { | |
| 290 return parent; | |
| 291 } | |
| 292 | |
| 293 /** | |
| 294 * Sets the parent. | |
| 295 * @param parent The parent to set | |
| 296 */ | |
| 297 public void setParent(DocuDirectory parent) { | |
| 298 this.parent = parent; | |
| 299 } | |
| 300 | |
| 91 | 301 /** Returns the meta-data for this fileset. |
| 302 * | |
| 303 * @return HashMap | |
| 304 */ | |
| 305 public HashMap getFileMeta() { | |
| 306 return fileMeta; | |
| 307 } | |
| 308 | |
| 309 /** | |
| 310 * Sets the fileMeta. | |
| 311 * @param fileMeta The fileMeta to set | |
| 312 */ | |
| 313 public void setFileMeta(HashMap fileMeta) { | |
| 314 this.fileMeta = fileMeta; | |
| 315 } | |
| 316 | |
| 130 | 317 /** |
| 318 * @return | |
| 319 */ | |
| 320 public boolean isMetaChecked() { | |
| 321 return metaChecked; | |
| 322 } | |
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323 |
| 130 | 324 /** |
| 325 * @return | |
| 326 */ | |
| 327 public double getResX() { | |
| 328 return resX; | |
| 329 } | |
| 330 | |
| 331 /** | |
| 332 * @return | |
| 333 */ | |
| 334 public double getResY() { | |
| 335 return resY; | |
| 336 } | |
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337 |
| 86 | 338 } |