Name: vpR10011 Date: 04/18/2001



Specification of the class javax.imageio.stream.ImageInputStreamImpl says:

"public void readBytes(IIOByteBuffer buf, int len) throws IOException
...
Parameters:
    buf - an IIOByteBuffer object to be modified.
    len - the maximum number of bytes to read.
Throws:
    IndexOutOfBoundsException - if len is negative or
    off + len is greater than b.length."

But readBytes throws NegativeArraySizeException if len is negative.
Furthermore, the assertion about "off + len" is not relevant for this
method.


To reproduce this bug run the following test:
---------------------test.java--------------
import java.io.*;
import javax.imageio.stream.*;

public class test {
    public static void main(String[] argv) {
        byte [] bar = {1, 1, 1};
        InputStream is = (InputStream) new ByteArrayInputStream(bar);
        ImageInputStreamImpl iisI = (ImageInputStreamImpl) new MemoryCacheImageInputStream(is);
byte [] b = new byte[10];
        IIOByteBuffer iiob = new IIOByteBuffer(b, 0, b.length);
System.out.println("len < 0 ");
try {
iisI.readBytes(iiob, -1);
} catch (IndexOutOfBoundsException e) {
            System.out.println("Passed");
} catch (Exception e) {
System.out.println("Failed: unexpected exception " + e);
}
    }
}
-------------------------log----------------
% java -version
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b60)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b60, mixed mode)
% java test
len < 0
Failed: unexpected exception java.lang.NegativeArraySizeException



This bug causes failure of the new JCK test
api/javax_imageio/stream/ImageInputStreamImpl/index.html#readBytes


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