DifferenceListener

• DifferenceListener interface compares two nodes and tells whether they're identical, similar, or different.

• differenceFound method is invoked for non-identical nodes

• This is one way: we can say two different nodes are identical or similar; but we can't say two identical nodes aren't equal

• Can't control the tree walking order or skip nodes completely

package org.custommonkey.xmlunit;

public interface DifferenceListener {

    public final int RETURN_ACCEPT_DIFFERENCE = 0;
    public final int RETURN_IGNORE_DIFFERENCE_NODES_IDENTICAL = 1;
    public final int RETURN_IGNORE_DIFFERENCE_NODES_SIMILAR = 2;

    public int differenceFound(Difference difference);
    public void skippedComparison(Node control, Node test);

}