BufferedReader newInput(String directoryName, String fileName, String charset)Returns a BufferedReader instance for the specified file in the specified directory and the specified file encoding. The BufferedReader object is tracked by the CalloutBIC framework and will be properly closed by the cleanup() method. Returns null if the file could not be opened.
- directoryName – fully-qualified path for the directory containing the file
- filename – name of the file to be opened
- charset – name of the encoding for the file (e.g., "UTF-8")