vertx / io.vertx.rxjava.ext.web.api.validation / HTTPRequestValidationHandler / addFormParamWithPattern

# addFormParamWithPattern

`open fun addFormParamWithPattern(parameterName: String, pattern: String, required: Boolean): HTTPRequestValidationHandler`

Add a single parameter inside a form with a custom pattern

### Parameters

`parameterName` - expected name of parameter inside the form

`pattern` - regular expression for validation

`required` - true if parameter is required

Return
this handler