Name: naC79102 Date: 11/23/2000


Several methods in java.awt.image.ComponentSampleModel state that "An
ArrayIndexOutOfBoundsException might be thrown if the
coordinates are not in bounds." but the actual algorithm to reproduce
the condition which will produce this Exception is not mentioned.
Exception is not thrown when x,y < 0, but some other condition is
satisfied (presumabily when y*scanlineStride + x*pixelStride +
bandOffsets[band] < 0).
The same problem holds true for even the bounds on the width and height.

Sample code follows....
package
javasoft.sqe.tests.api.java.awt.java2d.image.ComponentSampleModel;

import java.awt.image.ComponentSampleModel;
import java.awt.image.DataBufferInt;
import java.awt.image.DataBuffer;

public class test {
public test() {

 ComponentSampleModel csm = new ComponentSampleModel(
   DataBuffer.TYPE_BYTE,5,5,1,5,
            new int[]{0,1,2});
    DataBufferInt db = new DataBufferInt(4000,2);
    int b = 5;

   try {
  // x<0
         csm.setSample(-1,25,1,b,db);
         System.out.println("No Exception. ");
   } catch (Exception e) {
     System.out.println("Caught "+e);
   }

   try {
  // y<0
         csm.setSample(25,-1,1,b,db);
         System.out.println("No Exception. ");
   } catch (Exception e) {
     System.out.println("Caught "+e);
   }

   try {
  // y*scanlineStride + x*pixelStride + bandOffsets[b] < 0
   csm.setSample(-1,-1,1,b,db);
   System.out.println("No Exception. ");
 } catch (Exception e) {
  System.out.println("Caught "+e);
 }
}

public static void main(String[] args) {
        new test();
}
}
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