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

Modifier and Type	Method and 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.

Methods inherited from interface java.lang.AutoCloseable

close

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

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.