/**
* Returns a cached copy of the given file. The cached copy is guaranteed to not be modified or
* removed.
*
* @param original The source file.
* @param baseDirFactory A factory that can provide a base directory for the file cache.
* @return The cached file.
*/
public File getCachedJar(File original, Factory<File> baseDirFactory) {
File source = FileUtils.canonicalize(original);
FileInfo fileInfo;
// TODO - do some of this work concurrently
lock.lock();
try {
fileInfo = cachedFiles.getIfPresent(source);
if (fileInfo == null || !fileInfo.cachedFile.exists()) {
// TODO - use the hashing service for this
long lastModified = source.lastModified();
long length = source.length();
HashValue hashValue = HashUtil.createHash(source, "sha1");
fileInfo = copyIntoCache(baseDirFactory, source, lastModified, length, hashValue);
} else {
// TODO - use the change detection service for this
long lastModified = source.lastModified();
long length = source.length();
if (lastModified != fileInfo.lastModified || length != fileInfo.length) {
HashValue hashValue = HashUtil.createHash(source, "sha1");
if (!hashValue.equals(fileInfo.hashValue)) {
fileInfo = copyIntoCache(baseDirFactory, source, lastModified, length, hashValue);
}
}
}
} finally {
lock.unlock();
}
return fileInfo.cachedFile;
}
private File getOutputFile(WindowsResourceCompileSpec spec) {
String outputFileName = FilenameUtils.getBaseName(inputFile.getName()) + ".res";
String compactMD5 = HashUtil.createCompactMD5(inputFile.getAbsolutePath());
File outputDirectory = new File(spec.getObjectFileDir(), compactMD5);
if (!outputDirectory.exists()) {
outputDirectory.mkdir();
}
File outputFile = new File(outputDirectory, outputFileName);
return windowsPathLengthLimitation
? FileUtils.assertInWindowsPathLengthLimitation(outputFile)
: outputFile;
}