validateFile (PrimeFaces VDL Documentation)

Description:

`p:validateFile` is a validator which can be used to validate single and mulitple files, either of `p:fileUpload` or `h:inputFile`.

Attributes
Name	Required	Type	Description
`allowTypes`	`false`	`jakarta.el.ValueExpression` (must evaluate to `java.lang.String`)	Regular expression for accepted file types, e.g., /(\.\|\/)(gif\|jpeg\|jpg\|png)$/
`contentType`	`false`	`jakarta.el.ValueExpression` (must evaluate to `java.lang.String`)	Wheter the content type should be validated based on the accept attribute of the attached component. Default is false.
`fileLimit`	`false`	`jakarta.el.ValueExpression` (must evaluate to `java.lang.Integer`)	Maximum number of files to be uploaded.
`sizeLimit`	`false`	`jakarta.el.ValueExpression` (must evaluate to `java.lang.Long`)	Individual file size limit in bytes. Default is unlimited.
`virusScan`	`false`	`jakarta.el.ValueExpression` (must evaluate to `java.lang.Boolean`)	Whether virus scan should be performed. Default is false.

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