/**
* @param fileName the name of the file to find
* @param checkClassPath if <code>true</code>, the class path is first searched for the file,
* otherwise the class path is not searched unless it's one of the explicit paths in the cache
* search directories
* @return a handle to the requested file if it exists in the cache, otherwise null
* @throws IllegalArgumentException if <code>fileName</code> is null
*/
public java.net.URL findFile(String fileName, boolean checkClassPath) {
if (fileName == null) {
String message = Logging.getMessage("nullValue.FilePathIsNull");
Logging.logger().severe(message);
throw new IllegalArgumentException(message);
}
if (checkClassPath) {
java.net.URL url = this.getClass().getClassLoader().getResource(fileName);
if (url != null) return url;
// Check for a thread context class loader. This allows the file store to find resources in a
// case
// in which different parts of the application are handled by different class loaders.
ClassLoader tccl = Thread.currentThread().getContextClassLoader();
if (tccl != null) {
url = tccl.getResource(fileName);
if (url != null) return url;
}
}
for (StoreLocation location : this.readLocations) {
java.io.File dir = location.getFile();
if (!dir.exists()) continue;
java.io.File file = new java.io.File(makeAbsolutePath(dir, fileName));
if (file.exists()) {
try {
if (location.isMarkWhenUsed()) markFileUsed(file);
else markFileUsed(file.getParentFile());
return file.toURI().toURL();
} catch (java.net.MalformedURLException e) {
Logging.logger()
.log(
Level.SEVERE,
Logging.getMessage("FileStore.ExceptionCreatingURLForFile", file.getPath()),
e);
}
}
}
return null;
}
