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package Torello.HTML;

/**
 * If an HTML-Page {@code Vector} index-position should contain a {@code TagNode} whose
 * <CODE>TagNode&#46;isClosing</CODE> field is set {@code FALSE}, <I>but that field is
 * {@code TRUE},</I> then this exception should throw.
 * 
 * <BR /><BR /><B CLASS=JDDescLabel>Using this Exception:</B>
 * 
 * <BR />This type of situation is good to check when a method or function receives an
 * {@code int[]} position-{@code array} generated by one of the Node-Search Package {@code FIND}
 * methods.
 * 
 * <BR /><BR />Usually such position integer-arrays point to lists of nodes, and guaranteeing that
 * <I>each node pointed-to by that array is, in fact, an Open-TagNode</I>, is usually a good check
 * to perform.
 */
public class OpeningTagNodeExpectedException extends TagNodeExpectedException
{
    /** <EMBED CLASS='external-html' DATA-FILE-ID=SVUIDEX> */
    public static final long serialVersionUID = 1;

    /** Constructs an {@code OpeningTagNodeExpectedException} with no detail message. */
    public OpeningTagNodeExpectedException()
    { super(); }

    /**
     * Constructs an {@code OpeningTagNodeExpectedException} with the specified detail message.
     * @param message the detail message.
     */
    public OpeningTagNodeExpectedException(String message)
    { super(message); }

    /**
     * Constructs a new exception with the specified detail message and cause.
     * 
     * <BR /><BR /><B CLASS=JDDescLabel>NOTE:</B>
     * 
     * <BR /><BR />The detail message associated with cause is not automatically incorporated into
     * this exception's detail message.
     * 
     * @param message The detail message (which is saved for later retrieval by the
     * {@code Throwable.getMessage()} method).
     * 
     * @param cause the cause (which is saved for later retrieval by the
     * {@code Throwable.getCause()} method).  (A null value is permitted, and indicates that the
     * cause is nonexistent or unknown.)
     */
    public OpeningTagNodeExpectedException(String message, Throwable cause)
    { super(message, cause); }

    /**
     * Constructs a new exception with the specified cause and a detail message of
     * {@code (cause==null ? null : cause.toString())} (which typically contains the class and
     * detail message of cause).
     * 
     * <BR /><BR />This constructor is useful for exceptions that are little more than wrappers for
     * other {@code Throwables.}
     * 
     * @param cause The cause (which is saved for later retrieval by the
     * {@code Throwable.getCause()} method).  (A null value is permitted, and indicates that the
     * cause is nonexistent or unknown.)
     */
    public OpeningTagNodeExpectedException(Throwable cause)
    { super(cause); }

    /**
     * Builds a new exception with a consistently worded error message.  The parameter
     * {@code 'pos'} is used to identify the {@code Vector} location where the error has occurred.
     * 
     * @param pos This is the {@code Vector} index where an Opening HTML {@code TagNode} Element
     * was expected.
     */
    public OpeningTagNodeExpectedException(int pos)
    {
        this(
            "The Object reference at vector location [" + pos + "] was an instance of TagNode, but " +
            "it's 'isClosing' field was set to TRUE.  An Opening HTML Element (not a closing one) was " +
            "expected here."
        );
    } 
}