[jdom-interest] API Inertia

[Joseph Bowbeer]

PS - Here's an attempt to show a simple Visitor example:

For example, the XPath getValue method for Attribute, Element, etc.
could be implemented using a XPathValueVisitor.

This would require that every object in a document implement Visitable.

    interface Visitable {
        void accept(Visitor visitor);
    }

The XPathValueVisitor computes the value appropriate for the particular
visitable instance:

    class XPathValueVisitor extends Visitor {
        Object value;
        void visitElement(Element element) {
            value = element.whatever();
        }
        void visitAttribute(Attribute attribute) {
            value = attribute.whatever();
        }
        // ...etc...
    }

The XPath value would be retrieved as follows:

    Object getValue(Visitable node) {
        XPathValueVisitor visitor = new XPathValueVisitor();
        node.accept(visitor);
        return visitor.value;
    }

--
Joe Bowbeer