Name: mlR10151 Date: 04/04/2001



The spec for the MemoryCacheImageInputStream.flushBefore(long pos)
says nothing about throwing IndexOutOfBoundsException if attempt to
"flushBefore" a flushed position.

But it throws the IndexOutOfBoundsException, saying that "pos already disposed" in the following
case:

===================== a.java =======================
import java.io.*;
import javax.imageio.stream.*;

public class a {
    public static void main (String argv[]) throws Exception {
        byte[] ba = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0};
        InputStream istream = new ByteArrayInputStream(ba);
        MemoryCacheImageInputStream mciis = new MemoryCacheImageInputStream(istream);

        mciis.flushBefore(Long.MAX_VALUE);

        System.out.println("Passed");
    }
}
===================== log =======================
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b58)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b58, mixed mode)
Exception in thread "main" java.lang.IndexOutOfBoundsException: pos already disposed
        at javax.imageio.stream.MemoryCache.disposeBefore(MemoryCache.java:300)
        at
javax.imageio.stream.MemoryCacheImageInputStream.flushBefore(MemoryCacheImageInputStream.java:94)
        at a.main(a.java:10)


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



Note, that if I really try to flush a flushed position, for example by
    mciis.flushBefore(5);
    mciis.flushBefore(4);
it does not throw any exception.


======================================================================