ISelectionValidator (Eclipse Platform API Specification)

All Known Implementing Classes:

CopyResourceAction, MoveResourceAction, ResourceNavigatorMoveAction
```
public interface ISelectionValidator
```
For validating selections in some selection dialogs.
Clients should implement this interface to define specialized selection validators.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.lang.String`	`isValid(java.lang.Object selection)`	Returns a string indicating whether the given selection is valid.

- Method Detail
  - isValid
```
java.lang.String isValid(java.lang.Object selection)
```
    Returns a string indicating whether the given selection is valid. If the result is null, the selection is considered to be valid; if the result is non-empty, it contains the error message to be displayed to the user.
    
    Parameters:
    
    selection - the selection to be validated
    
    Returns:
    
    the error message, or null indicating that the value is valid