UploadFileCallback (Box Java SDK)

```
public interface UploadFileCallback
```
The callback which allows file content to be written on output stream.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`writeToStream(OutputStream outputStream)` Called when file upload api is called and requests to write content to output stream.

- Method Detail
  - writeToStream
```
void writeToStream(OutputStream outputStream)
            throws IOException
```
    Called when file upload api is called and requests to write content to output stream.
    
    Parameters:
    
    outputStream - Output stream to write file content to be uploaded.
    
    Throws:
    
    IOException - Exception while writing to output stream.