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I have an InputStream of which I read data to log it on the screen. Then, this data I wish to pass it to an StaxParser. However the staxparser doesn't know to feed continuously from string,but rather input stream.

So I would like to clone the same inputstream to read both from it.

Do you have any better idea? If not, how can I clone the InputStreams?

Kind regards,

adragomir
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2 Answers2

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One way to "clone" the input stream would be the following: Note that you need to handle the exceptions :)

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len;
while ((len = input.read(buffer)) > -1 ) {
    byteArrayOutputStream.write(buffer, 0, len);
}
byteArrayOutputStream.flush();

InputStream inputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());

Also reference How to clone an InputStream? for more options.

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imps
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2

You may store what you've read inside a String, then create an InputStream with it, and pass it to the parser :

InputStream is = new ByteArrayInputStream(srcString.getBytes());

Or, you have several ways to re-read from the same Stream, see here :

Read stream twice

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Arnaud
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