Package com.thebuzzmedia.exiftool.process

Interface CommandProcess

  • All Superinterfaces:
    AutoCloseable
    All Known Implementing Classes:
    DefaultCommandProcess
    public interface CommandProcess
extends AutoCloseable
    Process interface.
    A process will define some methods to:
    • Read output until a condition returns false.
    • Send input stream to the opened process.
    • Check if process is closed or still opened.

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      void flush()
      Flush pending write operations.
      boolean isClosed()
      Check if current process has been closed.
      boolean isRunning()
      Check if current process is still opened.
      String read()
      Read output until a null line is read.
      String read​(OutputHandler handler)
      Read output until: A null line is read. Handler returns false when line is read. Since command process will not be closed, a simple string is returned (an exit status cannot be computed).
      void write​(Iterable<String> inputs)
      Write set of inputs to the current process.
      void write​(String input, String... others)
      Write input string to the current process.

    • Method Detail

      • read

        String read()
     throws IOException
        Read output until a null line is read.
        Since command process will not be closed, a simple string is returned (an exit status cannot be computed).
        Returns:
        Command result.
        Throws:
        IOException - If an error occurred during operation.

      • read

        String read​(OutputHandler handler)
     throws IOException
        Read output until:
        • A null line is read.
        • Handler returns false when line is read.
        Since command process will not be closed, a simple string is returned (an exit status cannot be computed).
        Parameters:
        handler - Output handler.
        Returns:
        Full output.
        Throws:
        IOException - If an error occurred during operation.

      • write

        void write​(String input,
           String... others)
    throws IOException
        Write input string to the current process.
        Parameters:
        input - Input.
        others - Other inputs.
        Throws:
        IOException - If an error occurred during operation.

      • write

        void write​(Iterable<String> inputs)
    throws IOException
        Write set of inputs to the current process.
        Parameters:
        inputs - Collection of inputs.
        Throws:
        IOException - If an error occurred during operation.

      • flush

        void flush()
    throws IOException
        Flush pending write operations.
        Throws:
        IOException - If an error occurred during operation.

      • isRunning

        boolean isRunning()
        Check if current process is still opened. If this method returns true, then isClosed() should return false.
        Returns:
        true if process is open, false otherwise.

      • isClosed

        boolean isClosed()
        Check if current process has been closed. If this method returns true, then isRunning() should return false.
        Returns:
        true if process is closed, false otherwise.