Name: vpR10011 Date: 04/17/2001



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

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

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

The following methods:
    writeDoubles(double[] d, int off, int len)
    writeFloats(float[] f, int off, int len)
    writeInts(int[] i, int off, int len)
    writeLongs(long[] l, int off, int len)
    writeShorts(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) {
        OutputStream os = (OutputStream) new ByteArrayOutputStream();
        ImageOutputStreamImpl iosI = (ImageOutputStreamImpl) new MemoryCacheImageOutputStream(os);
        char [] c = {'a', 'b'};
System.out.println("len < 0");
        try {
            iosI.writeChars(c, 0, -2);
        } catch (IndexOutOfBoundsException e) {
            System.out.println("Passed: " + e);
        } catch (Exception e) {
            System.out.println("Failed: unexpected exception " + e);
        }
        System.out.println("off + len > c.length");
        try {
            iosI.writeChars(c, 5, 100);
        } catch (IndexOutOfBoundsException e) {
            System.out.println("Passed: " + e);
        } catch (Exception e) {
            System.out.println("Failed: unexpected exception " + e);
        }
    }
}
--------------------------------------------
% 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
off + len > c.length
Failed: unexpected exception java.lang.IllegalArgumentException


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


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