Copy InputStream, abort operation if size exceeds limit

Question

I tried to copy an InputStream to a File, and abort the copy if the size of InputStream is greater than 1MB. In Java7, I wrote code as below:

public void cop         


        

Answer 1

First question: is there any better solution for it?

Not really. Certainly, not significantly better.

Second question: my other solution - Before the copy operation, I calculate size of InputStream. So I copy the InputStream to ByteArrayOutputStream then get size(). But the problem is InputStream may not markSupported(), so the InputStream cannot be reused in copy file operation.

_{Leaving aside that the above is a statement not a question ...}

If you have copied the bytes to the ByteArrayOutputStream, you can then create a ByteArrayInputStream from the byte array returned by baos.toByteArray(). So you don't need to mark / reset the original stream.

However, that is a pretty ugly way of implementing this. Not least because you are reading and buffering the entire input stream anyway.