protected long getSourceFileLength(EvalFilePaths fps, List<Metadata> metadataList) {
        if (fps.getSourceFileLength() > NON_EXISTENT_FILE_LENGTH) {
            return fps.getSourceFileLength();
        }
        return getSourceFileLength(metadataList);
    }
@param extractRootDir
@param relativeSourceFilePath
@return extractFile or null if couldn't find one.
tika-eval/tika-eval-app/src/main/java/org/apache/tika/eval/app/AbstractProfiler.java