232 
 233     public ByteOrder getByteOrder() {
 234         return byteOrder;
 235     }
 236 
 237     public Path getImagePath() {
 238         return imagePath;
 239     }
 240 
 241     @Override
 242     public void close() throws IOException {
 243         if (channel != null) {
 244             channel.close();
 245         }
 246     }
 247 
 248     public ImageStringsReader getStrings() {
 249         return stringsReader;
 250     }
 251 
 252     public ImageLocation findLocation(String mn, String rn) {
 253         Objects.requireNonNull(mn);
 254         Objects.requireNonNull(rn);




 255 
 256         return findLocation("/" + mn + "/" + rn);
















 257     }
 258 
 259     public synchronized ImageLocation findLocation(String name) {
 260         Objects.requireNonNull(name);
 261         // Details of the algorithm used here can be found in
 262         // jdk.tools.jlink.internal.PerfectHashBuilder.
 263         int count = header.getTableLength();
 264         int index = redirect.get(ImageStringsReader.hashCode(name) % count);
 265 
 266         if (index < 0) {
 267             // index is twos complement of location attributes index.
 268             index = -index - 1;
 269         } else if (index > 0) {
 270             // index is hash seed needed to compute location attributes index.
 271             index = ImageStringsReader.hashCode(name, index) % count;
 272         } else {
 273             // No entry.
 274             return null;
 275         }
 276 

 232 
 233     public ByteOrder getByteOrder() {
 234         return byteOrder;
 235     }
 236 
 237     public Path getImagePath() {
 238         return imagePath;
 239     }
 240 
 241     @Override
 242     public void close() throws IOException {
 243         if (channel != null) {
 244             channel.close();
 245         }
 246     }
 247 
 248     public ImageStringsReader getStrings() {
 249         return stringsReader;
 250     }
 251 
 252     public synchronized ImageLocation findLocation(String module, String name) {
 253         Objects.requireNonNull(module);
 254         Objects.requireNonNull(name);
 255         // Details of the algorithm used here can be found in
 256         // jdk.tools.jlink.internal.PerfectHashBuilder.
 257         int count = header.getTableLength();
 258         int index = redirect.get(ImageStringsReader.hashCode(module, name) % count);
 259 
 260         if (index < 0) {
 261             // index is twos complement of location attributes index.
 262             index = -index - 1;
 263         } else if (index > 0) {
 264             // index is hash seed needed to compute location attributes index.
 265             index = ImageStringsReader.hashCode(module, name, index) % count;
 266         } else {
 267             // No entry.
 268             return null;
 269         }
 270 
 271         long[] attributes = getAttributes(offsets.get(index));
 272 
 273         if (!ImageLocation.verify(module, name, attributes, stringsReader)) {
 274             return null;
 275         }
 276         return new ImageLocation(attributes, stringsReader);
 277     }
 278 
 279     public synchronized ImageLocation findLocation(String name) {
 280         Objects.requireNonNull(name);
 281         // Details of the algorithm used here can be found in
 282         // jdk.tools.jlink.internal.PerfectHashBuilder.
 283         int count = header.getTableLength();
 284         int index = redirect.get(ImageStringsReader.hashCode(name) % count);
 285 
 286         if (index < 0) {
 287             // index is twos complement of location attributes index.
 288             index = -index - 1;
 289         } else if (index > 0) {
 290             // index is hash seed needed to compute location attributes index.
 291             index = ImageStringsReader.hashCode(name, index) % count;
 292         } else {
 293             // No entry.
 294             return null;
 295         }
 296