Question

There are a few factory methods in Google Guava to create InputSuppliers, e.g. from a byte[]:

ByteStreams.newInputStreamSupplier(bytes);

Or from a File:

Files.newInputStreamSupplier(file);

Is there a similar way to to create an InputSupplier for a given InputStream?

That is, a way that’s more concise than an anonymous class:

new InputSupplier<InputStream>() {
    public InputStream getInput() throws IOException {
        return inputStream;
    }
};

Background: I’d like to use InputStreams with e.g. Files.copy(...) or ByteStreams.equal(...).

Answer 1

No, I haven’t seen anything.
I think you have found the best way.
The only alternative where to store the inputstream in a byte array or a file and create a Supplier with ByteStreams.newInputStreamSupplier() or Files.newInputStreamSupplier(), but I would discourage to do like that.
You could also use

public static long copy(InputStream from, OutputStream to)

from

ByteStreams

see:src