DirChangeMonitor (adams-pom 25.12.0-SNAPSHOT API)

All Known Implementing Classes:

AbstractDirChangeMonitor, AbstractMessageDigestBasedMonitor, FlowFileDigest, LastModified, MessageDigest, MultiMonitor, NoChange, Size
```
public interface DirChangeMonitor
```
Interface for directory change monitors.

Author:

FracPete (fracpete at waikato dot ac dot nz)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`File`	`getMonitoredDir()`	Returns the dir that is being monitored.
`boolean`	`hasChanged(File dir)`	Checks whether the dir has changed.
`String`	`initialize(File dir)`	Initializes the monitor with the specified dir.
`boolean`	`isInitialized(File dir)`	Checks whether the monitor has been initialized with the specified dir.
`String`	`update(File dir)`	Updates the monitor with the specified dir.

- Method Detail
  - isInitialized
```
boolean isInitialized(File dir)
```
    Checks whether the monitor has been initialized with the specified dir.
    
    Parameters:
    
    dir - the dir to check
    
    Returns:
    
    true if setup for this file
    
    See Also:
    
    initialize(File)
  - initialize
```
String initialize(File dir)
```
    Initializes the monitor with the specified dir.
    
    Parameters:
    
    dir - the dir to initialize with
    
    Returns:
    
    null if successful, otherwise error message
  - getMonitoredDir
```
File getMonitoredDir()
```
    Returns the dir that is being monitored.
    
    Returns:
    
    the dir, null if not initialized
  - hasChanged
```
boolean hasChanged(File dir)
```
    Checks whether the dir has changed. Must be initialized beforehand.
    
    Parameters:
    
    dir - the fildire to check
    
    Returns:
    
    true if changed
    
    See Also:
    
    isInitialized(File), initialize(File)
  - update
```
String update(File dir)
```
    Updates the monitor with the specified dir.
    
    Parameters:
    
    dir - the dir to update with
    
    Returns:
    
    null if successful, otherwise error message