Name: aaR10142 Date: 09/04/2000


swing.text.ZoneView.loadChildren() method throws unexpected NullPointerException

All works correctly in jdk1.3
See example

------------------------- example ----------------
import javax.swing.text.*;

public class Test {
    public static void main (String[] args) {

        Element elem = new StubElement("");
        Element elem2 = new StubElement("");
        int axis = View.X_AXIS;
        ZoneView zone = new ZoneView(elem, axis);

        // setParent() calls the loadChildren() method
        zone.setParent(new ZoneView(elem2, axis));

        System.out.println("Ok");
    }
}

class StubElement implements Element {
    Document document = new DefaultStyledDocument();

    public StubElement(String context) {
        super();
        try {
            document.insertString(0, context, new SimpleAttributeSet());
        } catch (BadLocationException e) {}
    }

    public Document getDocument() { return document; }
    public Element getParentElement() { return null; }
    public String getName() { return "StubElement"; }
    public AttributeSet getAttributes() { return new SimpleAttributeSet(); }
    public int getStartOffset() { return 0; }
    public int getEndOffset() { return document.getLength(); }
    public int getElementIndex(int offset) { return 0; }
    public int getElementCount() { return 1; }
    public Element getElement(int index) { return this; }
    public boolean isLeaf() { return true; }
}

------------------------- jdk1.4 output ----------------
Exception in thread "main" java.lang.NullPointerException
        at javax.swing.text.ZoneView$Zone.loadChildren(ZoneView.java:428)
        at javax.swing.text.AsyncBoxView.setParent(AsyncBoxView.java:459)
        at javax.swing.text.CompositeView.replace(CompositeView.java:197)
        at javax.swing.text.BoxView.replace(BoxView.java:150)
        at javax.swing.text.View.append(View.java:417)
        at javax.swing.text.ZoneView.loadChildren(ZoneView.java:217)
        at javax.swing.text.CompositeView.setParent(CompositeView.java:125)
        at Test.main(Test.java:12)
------------------------- jdk1.3 output ----------------
Ok

See JCK tests
api/javax_swing/text/ZoneView/index.html#misc
for more failures

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