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For validating selections in some selection dialogs.
Clients should implement this interface to define specialized selection validators.
| Method Summary | |
String |
isValid(Object selection)
Returns a string indicating whether the given selection is valid. |
| Method Detail |
public String isValid(Object selection)
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.
selection - the selection to be validated
null indicating
that the value is valid
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