/*
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Copyright (c) 2001-2008,2015 Jeff Martin, Tim Bacon
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*/
package org.custommonkey.xmlunit;
import org.w3c.dom.Node;
/**
* Listener for callbacks from a
* {@link DifferenceEngine#compare DifferenceEngine comparison}.
*/
public interface DifferenceListener {
/**
* Standard return value for the <code>differenceFound</code> method.
* Indicates that the <code>Difference</code> is interpreted as defined
* in {@link DifferenceConstants DifferenceConstants}.
*/
int RETURN_ACCEPT_DIFFERENCE = 0;
/**
* Override return value for the <code>differenceFound</code> method.
* Indicates that the nodes identified as being different should be
* interpreted as being identical.
*/
int RETURN_IGNORE_DIFFERENCE_NODES_IDENTICAL = 1;
/**
* Override return value for the <code>differenceFound</code> method.
* Indicates that the nodes identified as being different should be
* interpreted as being similar.
*/
int RETURN_IGNORE_DIFFERENCE_NODES_SIMILAR = 2;
/**
* Override return value for the <code>differenceFound</code> method.
* Indicates that the nodes identified as being similar should be
* interpreted as being different.
*/
int RETURN_UPGRADE_DIFFERENCE_NODES_DIFFERENT = 3;
/**
* Receive notification that 2 nodes are different.
* @param difference a Difference instance as defined in {@link
* DifferenceConstants DifferenceConstants} describing the cause
* of the difference and containing the detail of the nodes that
* differ
* @return int one of the RETURN_... constants describing how this
* difference was interpreted
*/
int differenceFound(Difference difference);
/**
* Receive notification that a comparison between 2 nodes has been skipped
* because the node types are not comparable by the DifferenceEngine
* @param control the control node being compared
* @param test the test node being compared
* @see DifferenceEngine
*/
void skippedComparison(Node control, Node test);
}