Name: vrR10176 Date: 04/12/2001



Api spec (jdk1.4.0beta-b59) says about method
javax.imageio.ImageWriteParam.setProgressiveMode():
"public void setProgressiveMode(int mode)
  Specifies that the writer is to write the image out in a progressive mode
such that the stream will contain a series of scans of increasing quality.
The mode argument determines how the progression parameters are chosen, and
must be either MODE_DISABLED, MODE_COPY_FROM_METADATA, or MODE_DEFAULT.
Otherwise an IllegalArgumentException is thrown.
The modes are interpreted as follows:
  MODE_DISABLED - No progression. Use this to turn off progession.
  MODE_COPY_FROM_METADATA - The output image will use whatever progression
    parameters are found in the metadata objects passed into the writer.
  MODE_DEFAULT - The image will be written progressively, with parameters chosen by the writer.
The default is MODE_COPY_FROM_METADATA.
  Parameters: mode - The mode for setting progression in the output stream.
  Throws:
    UnsupportedOperationException - if the writer does not support progressive encoding.
    IllegalArgumentException - if mode is not one of the modes listed above."

Therefore if passed mode argument is ImageWriteParam.MODE_EXPLICIT (this mode
is not one of the modes listed above) then setProgressiveMode() should throw
IllegalArgumentException, but the method throws UnsupportedOperationException.

To reproduce the issue execute following test.
------------ myImageWriteParam.java ------------------------
import javax.imageio.ImageWriteParam;

public class myImageWriteParam extends ImageWriteParam {

public myImageWriteParam() {
super(null);
super.canWriteProgressive = true;
}

public static void main(String[] argv) {
myImageWriteParam myimagewriteparam = new myImageWriteParam();
try{
myimagewriteparam.setProgressiveMode(ImageWriteParam.MODE_EXPLICIT);
System.out.println("Test failed. IllegalArgumentException was expected");
} catch (IllegalArgumentException e) {
System.out.println("Test passed");
} catch (Throwable e) {
System.out.println("Test failed with unexpected exception: " + e);
}
}
}
------------ Logs ------------------------------------------
$ java -version
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b59)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b59, mixed mode)

$ javac myImageWriteParam.java

$ java myImageWriteParam
Test failed with unexpected exception: java.lang.UnsupportedOperationException: MODE_EXPLICIT not supported for progressive output
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