FilterCommand (JGit - Core 6.4.0.202211300538-r API)

java.lang.Object
- org.eclipse.jgit.attributes.FilterCommand

```
public abstract class FilterCommand
extends Object
```
An abstraction for JGit's builtin implementations for hooks and filters. Instead of spawning an external processes to start a filter/hook and to pump data from/to stdin/stdout these builtin commmands may be used. They are constructed by FilterCommandFactory.

Since:

4.6

- Field Summary
  
  Fields
  Modifier and Type Field Description
  
  protected InputStream in
  The InputStream this command should read from
  
  protected OutputStream out
  The OutputStream this command should write to
- Constructor Summary
  
  Constructors
  Constructor Description
  
  FilterCommand(InputStream in, OutputStream out)
  Constructor for FilterCommand
- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  abstract int run()
  Execute the command.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - in
```
protected InputStream in
```
    The InputStream this command should read from
  - out
```
protected OutputStream out
```
    The OutputStream this command should write to
- Constructor Detail
  - FilterCommand
```
public FilterCommand(InputStream in,
                     OutputStream out)
```
    Constructor for FilterCommand
    FilterCommand implementors are required to manage the in and out streams (close on success and/or exception).
    
    Parameters:
    
    in - The InputStream this command should read from
    
    out - The OutputStream this command should write to
- Method Detail
  - run
```
public abstract int run()
                 throws IOException
```
    Execute the command. The command is supposed to read data from in and to write the result to out. It returns the number of bytes it read from in. It should be called in a loop until it returns -1 signaling that the InputStream is completely processed.
    On successful completion (return -1) or on Exception, the streams in and out are closed by the implementation.
    
    Returns:
    
    the number of bytes read from the InputStream or -1. -1 means that the InputStream is completely processed.
    
    Throws:
    
    IOException - when IOException occurred while reading from in or writing to out