| Access | Constructor and Description |
|---|---|
| public |
| Modifier and Type | Method and Description |
|---|---|
| public Optional | checkValue(String value)
Implements org. Validates the specified value. |
| ISSNChecker | back to summary |
|---|---|
| public ISSNChecker() | |
| checkValue | back to summary |
|---|---|
| public Optional Implements org. Doc from org. Validates the specified value. Returns an error message if the validation failed. Otherwise, an empty optional is returned. | |