Name: akC57697 Date: 12/21/98



 The AbstractDocument.AbstractElement c-tor AbstractElement(Element parent, AttributeSet a)
 throws StateInvariantError when invoke addAttributes(a)

The javadoc says:

Implements the abstract part of an element. By default elements
support attributes by having a field that
represents the immutable part of the current attribute
set for the element. The element itself implements
MutableAttributeSet which can be used to modify the
set by fetching a new immutable set. The immutable sets
are provided by the AttributeContext associated with the
document.

The JCK12-a tests passed under JDK1.2fcsV but fail under JDK1.2.2A


1365a1366,1367
> attributes = (a != null) ? a.copyAttributes() :
> getAttributeContext().getEmptySet();
1367,1369d1368
< attributes = getAttributeContext().getEmptySet();
< if (a != null) {
< addAttributes(a);


The short example:
--------------------------------8-<----------------------------------------
import javax.swing.text.*;
public class Test {
    public static void main(String[] argv) {
        try {
            DefaultStyledDocument doc = new DefaultStyledDocument();
            doc.insertString(0, "The test text.", null);
            // Consists of one paragraph
            // Create Element object with some attribute
            Element elem = doc.getCharacterElement(1);
            AttributeSet orig_attr = elem.getAttributes();
            // Create parent Element for clone
            Element parent = doc.getCharacterElement(2);
            DefaultStyledDocument.ElementBuffer eb = doc.new
                    ElementBuffer(elem);
            Element result = eb.clone(parent, elem);
            System.out.println("OKAY");
        } catch (Throwable e) {
            e.printStackTrace();
        }
    }
}
--------------------------------8-<----------------------------------------

Output:
(###@###.###): java Test
javax.swing.text.StateInvariantError: Illegal cast to MutableAttributeSet
at javax.swing.text.AbstractDocument$AbstractElement.checkForIllegalCast(Compiled Code)
at javax.swing.text.AbstractDocument$AbstractElement.addAttributes(Compiled Code)
at javax.swing.text.AbstractDocument$AbstractElement.<init>(Compiled Code)
at javax.swing.text.AbstractDocument$LeafElement.<init>(Compiled Code)
at javax.swing.text.AbstractDocument.createLeafElement(Compiled Code)
at javax.swing.text.DefaultStyledDocument$ElementBuffer.clone(Compiled Code)
at Test.main(Compiled Code)
(###@###.###): jdk1.2
(###@###.###): java Test
OKAY


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