Package com.vaadin.flow.server.streams

Interface UploadMetadataCallback

All Superinterfaces:
Serializable
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface UploadMetadataCallback extends Serializable
Callback for validating an upload's metadata before any data is read, used with AbstractUploadHandler.validateMetadata(UploadMetadataCallback).

Call UploadEvent.reject(String) to refuse the upload. See UploadValidator.validateMetadata(UploadEvent) for the phase semantics.

Since:
25.3

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    validate(UploadEvent event)
    Validates the upload metadata, rejecting it via UploadEvent.reject(String) if it must not be stored.