[jdom-interest] Element instanceof stacks

[Elliotte Rusty Harold]

I found some more places where we can delete code now that CDATA is a 
subclass of Text. In Element.java in line 546 I think we can change

            if (obj instanceof Text) {
                return ((Text) obj).getText();
            } else if (obj instanceof CDATA) {
                return ((CDATA) obj).getText();
            } else {
                return "";
            }

to

            if (obj instanceof Text) {
                return ((Text) obj).getText();
            } else {
                return "";
            }

A little later at line 561 we can change

            if (obj instanceof Text) {
                textContent.append(((Text) obj).getText());
                hasText = true;
            } else if (obj instanceof CDATA) {
                textContent.append(((CDATA) obj).getText());
                hasText = true;
            }

to

            if (obj instanceof Text) {
                textContent.append(((Text) obj).getText());
                hasText = true;
            }

Along similar lines I think we can delete the following methods in Element:

public Element *addContent(*CDATA cdata)
public boolean *removeContent(*CDATA cdata)

Since these will both be replaced by their Text equivalents, I don't 
think we'll break anybody's code if we don't deprecate first. The net 
effect should be a small simplification to the Element class.

-- 
+-----------------------+------------------------+-------------------+
| Elliotte Rusty Harold | elharo at metalab.unc.edu | Writer/Programmer |
+-----------------------+------------------------+-------------------+ 
|           The XML Bible, 2nd Edition (IDG Books, 2001)             |
|             http://www.cafeconleche.org/books/bible2/              |
|   http://www.amazon.com/exec/obidos/ISBN=0764547607/cafeaulaitA/   |
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