Name: vpR10011 Date: 04/18/2001



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

"public void readFully(byte[] b, int off, int len) throws IOException
...
Throws:
        IndexOutOfBoundsException - if off is negative, len is
        negative, or off + len is greater than b.length."

But if len < 0 or off + len is greater than b.length then readFully throws
IllegalArgumentException.

The following methods:
    readFully(char[] c, int off, int len)
    readFully(double[] d, int off, int len)
    readFully(float[] f, int off, int len)
    readFully(int[] i, int off, int len)
    readFully(long[] l, int off, int len)
    readFully(short[] s, int off, int len)
also throw IllegalArgumentException instead of IndexOutOfBoundsException
if len < 0 or off + len is greater than array's length.

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];
System.out.println("len < 0 ");
try {
iisI.readFully(b, 0, -1);
} catch (IndexOutOfBoundsException e) {
            System.out.println("Passed");
} catch (Exception e) {
System.out.println("Failed: unexpected exception " + e);
}
System.out.println("off + len > b.length");
try {
iisI.readFully(b, 0, 20);
} 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.IllegalArgumentException: len < 0 |off + len >
b.length!
off + len > b.length
Failed: unexpected exception java.lang.IllegalArgumentException: len < 0 |off + len >
b.length!


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


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