code: @Override
  	public long getLastModified(String filePath) {
  		long lastModified = 0;
  		File f = new File(filePath);
  		if (f.exists()) {
  			lastModified = f.lastModified();
  		}
  		return lastModified;
  	}
docs: /*
  (non-Javadoc)
  
  @see net.jawr.web.resource.handler.reader.ResourceReaderHandler#
  getLastModified(java.lang.String)