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comparison servlet/src/digilib/io/ImageFileSet.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
children 50bd3d9759f3
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574:790cbfb58b52 576:dad720e9b12b
1 /**
2 *
3 */
4 package digilib.io;
5
6 import java.io.File;
7 import java.util.ArrayList;
8 import java.util.Arrays;
9 import java.util.Map;
10
11 import digilib.io.FileOps.FileClass;
12
13 /**
14 * @author casties
15 *
16 */
17 public class ImageFileSet extends ImageSet implements DocuDirent {
18
19 /** this is an image file */
20 protected static FileClass fileClass = FileClass.IMAGE;
21 private Directory parent;
22 private boolean metaChecked;
23 private Map fileMeta;
24
25 /**
26 * Constructor with a file and hints.
27 *
28 * The hints are expected to contain 'basedirs' and 'scaledfilext' keys.
29 *
30 * @param file
31 * @param hints
32 */
33 public ImageFileSet(File file, Map<Integer,Object> hints) {
34 Directory[] dirs = (Directory[]) hints.get(FileOps.HINT_BASEDIRS);
35 int nb = dirs.length;
36 list = new ArrayList<ImageInput>(nb);
37 parent = dirs[0];
38 fill(dirs, file, hints);
39 }
40
41 /* (non-Javadoc)
42 * @see digilib.io.DocuDirent#getName()
43 */
44 @Override
45 public String getName() {
46 // TODO Auto-generated method stub
47 return null;
48 }
49
50 /* (non-Javadoc)
51 * @see digilib.io.DocuDirent#getParent()
52 */
53 @Override
54 public Directory getParent() {
55 // TODO Auto-generated method stub
56 return null;
57 }
58
59 /* (non-Javadoc)
60 * @see digilib.io.DocuDirent#setParent(digilib.io.Directory)
61 */
62 @Override
63 public void setParent(Directory parent) {
64 // TODO Auto-generated method stub
65
66 }
67
68 /* (non-Javadoc)
69 * @see digilib.io.DocuDirent#getFileMeta()
70 */
71 @Override
72 public MetadataMap getFileMeta() {
73 // TODO Auto-generated method stub
74 return null;
75 }
76
77 /* (non-Javadoc)
78 * @see digilib.io.DocuDirent#setFileMeta(digilib.io.MetadataMap)
79 */
80 @Override
81 public void setFileMeta(MetadataMap fileMeta) {
82 // TODO Auto-generated method stub
83
84 }
85
86 /* (non-Javadoc)
87 * @see digilib.io.DocuDirent#isMetaChecked()
88 */
89 @Override
90 public boolean isMetaChecked() {
91 // TODO Auto-generated method stub
92 return false;
93 }
94
95 /* (non-Javadoc)
96 * @see digilib.io.DocuDirent#compareTo(java.lang.Object)
97 */
98 @Override
99 public int compareTo(Object arg0) {
100 // TODO Auto-generated method stub
101 return 0;
102 }
103
104 @Override
105 public File getInput() {
106 // TODO Auto-generated method stub
107 return null;
108 }
109
110 /**
111 * Adds an ImageFile to this Fileset.
112 *
113 * The files should be added in the order of higher to lower resolutions.
114 * The first file is considered the hires "original".
115 *
116 *
117 * @param f
118 * file to add
119 * @return true (always)
120 */
121 public boolean add(ImageFile f) {
122 f.setParent(this);
123 return list.add(f);
124 }
125
126 /**
127 * Fill the ImageSet with files from different base directories.
128 *
129 *
130 * @param dirs
131 * list of base directories
132 * @param fl
133 * file (from first base dir)
134 * @param hints
135 *
136 */
137 void fill(Directory[] dirs, File fl, Map<Integer,Object> hints) {
138 int nb = dirs.length;
139 String fn = fl.getName();
140 String baseFn = FileOps.basename(fn);
141 // add the first ImageFile to the ImageSet
142 add(new ImageFile(fn, this, parent));
143 // iterate the remaining base directories
144 for (int dirIdx = 1; dirIdx < nb; dirIdx++) {
145 if (dirs[dirIdx] == null) {
146 continue;
147 }
148 // read the directory
149 if (dirs[dirIdx].getFilenames() == null) {
150 dirs[dirIdx].readDir();
151 }
152 String[] dirFiles = dirs[dirIdx].getFilenames();
153 // try the same filename as the original
154 int fileIdx = Arrays.binarySearch(dirFiles, fn);
155 if (fileIdx < 0) {
156 // try closest matches without extension
157 fileIdx = -fileIdx - 1;
158 // try idx
159 if ((fileIdx < dirFiles.length)
160 && (FileOps.basename(dirFiles[fileIdx]).equals(baseFn))) {
161 // idx ok
162 } else if ((fileIdx > 0)
163 && (FileOps.basename(dirFiles[fileIdx - 1])
164 .equals(baseFn))) {
165 // idx-1 ok
166 fileIdx = fileIdx - 1;
167 } else if ((fileIdx+1 < dirFiles.length)
168 && (FileOps.basename(dirFiles[fileIdx + 1])
169 .equals(baseFn))) {
170 // idx+1 ok
171 fileIdx = fileIdx + 1;
172 } else {
173 // basename doesn't match
174 continue;
175 }
176 }
177 if (FileOps.classForFilename(dirFiles[fileIdx]) == fileClass) {
178 /* logger.debug("adding file " + dirFiles[fileIdx]
179 + " to Fileset " + this.getName()); */
180 add(new ImageFile(dirFiles[fileIdx], this, dirs[dirIdx]));
181 }
182 }
183 }
184
185 /**
186 * Checks metadata and sets resolution in resX and resY.
187 *
188 */
189 public void checkMeta() {
190 if (metaChecked) {
191 return;
192 }
193 if (fileMeta == null) {
194 // try to read metadata file
195 readMeta();
196 if (fileMeta == null) {
197 // try directory metadata
198 ((DocuDirectory) parent).checkMeta();
199 if (((DocuDirectory) parent).getDirMeta() != null) {
200 fileMeta = ((DocuDirectory) parent).getDirMeta();
201 } else {
202 // try parent directory metadata
203 DocuDirectory gp = (DocuDirectory) parent.getParent();
204 if (gp != null) {
205 gp.checkMeta();
206 if (gp.getDirMeta() != null) {
207 fileMeta = gp.getDirMeta();
208 }
209 }
210 }
211 }
212 }
213 if (fileMeta == null) {
214 // no metadata available
215 metaChecked = true;
216 return;
217 }
218 metaChecked = true;
219 float dpi = 0;
220 float dpix = 0;
221 float dpiy = 0;
222 float sizex = 0;
223 float sizey = 0;
224 float pixx = 0;
225 float pixy = 0;
226 // DPI is valid for X and Y
227 if (fileMeta.containsKey("original-dpi")) {
228 try {
229 dpi = Float.parseFloat((String) fileMeta.get("original-dpi"));
230 } catch (NumberFormatException e) {
231 }
232 if (dpi != 0) {
233 resX = dpi;
234 resY = dpi;
235 return;
236 }
237 }
238 // DPI-X and DPI-Y
239 if (fileMeta.containsKey("original-dpi-x")
240 && fileMeta.containsKey("original-dpi-y")) {
241 try {
242 dpix = Float.parseFloat((String) fileMeta
243 .get("original-dpi-x"));
244 dpiy = Float.parseFloat((String) fileMeta
245 .get("original-dpi-y"));
246 } catch (NumberFormatException e) {
247 }
248 if ((dpix != 0) && (dpiy != 0)) {
249 resX = dpix;
250 resY = dpiy;
251 return;
252 }
253 }
254 // SIZE-X and SIZE-Y and PIXEL-X and PIXEL-Y
255 if (fileMeta.containsKey("original-size-x")
256 && fileMeta.containsKey("original-size-y")
257 && fileMeta.containsKey("original-pixel-x")
258 && fileMeta.containsKey("original-pixel-y")) {
259 try {
260 sizex = Float.parseFloat((String) fileMeta
261 .get("original-size-x"));
262 sizey = Float.parseFloat((String) fileMeta
263 .get("original-size-y"));
264 pixx = Float.parseFloat((String) fileMeta
265 .get("original-pixel-x"));
266 pixy = Float.parseFloat((String) fileMeta
267 .get("original-pixel-y"));
268 } catch (NumberFormatException e) {
269 }
270 if ((sizex != 0) && (sizey != 0) && (pixx != 0) && (pixy != 0)) {
271 resX = pixx / (sizex * 100 / 2.54f);
272 resY = pixy / (sizey * 100 / 2.54f);
273 return;
274 }
275 }
276 }
277
278 public void readMeta() {
279 // TODO Auto-generated method stub
280
281 }
282
283 }