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package Torello.HTML;

/**
 * A function-pointer definition that facilitates the substituting of {@code HTMLNode} elements in
 * Vectorized-HTML with other, user-provided, elements.
 * 
 * <EMBED CLASS='external-html' DATA-FILE-ID=REPLACE_FUNCTION>
 */
@FunctionalInterface
public interface ReplaceFunction extends java.io.Serializable
{
    /** <EMBED CLASS='external-html' DATA-FILE-ID=SVUIDFI>  */
    public static final long serialVersionUID = 1;

    /**
     * The intention here is to provide a "replace node" for a particular position in the
     * original-{@code Vector<HTMLNode>}
     * 
     * <BR /><BR /><EMBED CLASS='external-html' DATA-FILE-ID=FUNC_INTER_METH>
     * 
     * @param n This is the "old node" that needs replacing.  It will have been obtained
     * from the original HTML page {@code Vector}.
     * 
     * @param curVecPos The position in the original {@code Vector}.  This value may be
     * ignored, but is provided as a matter of convenience.
     * 
     * @param iterationCount The for-loop that will be making calls to
     * {@code 'getReplacement(...)'} provides the a loop-count to this method.  All that means
     * is there is a "loop variable" that is updated-by-one (incremented) each time this method is
     * called.
     * 
     * @return A new node to be substituted for the current node at the position identified by
     * {code 'curArrPos'}.
     */
    public HTMLNode getReplacement(HTMLNode n, int curVecPos, int iterationCount);
}