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## org.eclipse.jface.viewers
Interface ICellEditorValidator

public interface ICellEditorValidator

An interface for validating a cell editor's input.

This interface should be implemented by classes that wish to act as cell editor validators.

Method Summary
`String` | `isValid(Object value)` Returns a string indicating whether the given value is valid; `null` means valid, and non-`null` means invalid, with the result being the error message to display to the end user.

Method Detail

### isValid

    public String isValid(Object value)

  Returns a string indicating whether the given value is valid; `null` means valid, and non-`null` means invalid, with the result being the error message to display to the end user.

  Parameters:
    `value` - the value to be validated
  Returns:
    the error message, or `null` indicating that the value is valid

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