PdfReader close the given InputStream

Hi all.
I'm migrating a piece of code from iText library version 2.1.7 to latest
version 5.5.3.
I'm very confused about the new *PdfRead* class version. 
Looking on the source code I've found this hierarchy:

....
public PdfReader(final InputStream is) throws IOException {
        this(is, null);
....
 public PdfReader(final InputStream is, final byte ownerPassword[]) throws
IOException {
        this(
        		new *RandomAccessSourceFactory().createSource(is)*,
.....
public RandomAccessSource createSource(InputStream is) throws IOException{
       try {
        	return createSource(StreamUtil.inputStreamToArray(is));
        }
        finally {
            try {*is.close()*;}catch(IOException ioe){}
        }		
	}

It seems that now isn't possible to read through an InputStream without
closing it.
Is it correct? What I'm wrong?

Thanks in advance
Andrea.





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