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package Torello.HTML;

/**
 * If a programmer is expecting an HTML-Page {@code Vector} position-index to contain a
 * {@code TagNode} whose <CODE>TagNode&#46;isClosing</CODE> field to be set to {@code TRUE} and it
 * is not, then this exception should be thrown.
 * 
 * <BR /><BR /><B CLASS=JDDescLabel>NOTE:</B>
 * 
 * <BR />This {@code Exception} differs from the similarly-named {@link ClosingTagNodeException},
 * in that, here the programmer is specifying that the error which has occured is that the user
 * expected to find a <B>'closing version'</B> of a {@link TagNode} - one where it's
 * {@link TagNode#isClosing isClosing} field had been set to {@code FALSE}.
 * 
 * <BR /><BR />In {@code ClosingTagNodeException}, the user has attempted to perform some operation
 * on a {@code TagNode} element which is not permitted to be done to or by {@code TagNode's} whose
 * {@code 'isClosing'} field is set to {@code TRUE}.  They are similar, but the origins of the 
 * throws are quite different.  In the latter, usually a user has performed a {@link TagNode}
 * operation on the wrong type of {@code TagNode}.
 */
public class ClosingTagNodeExpectedException extends TagNodeExpectedException
{
    /** <EMBED CLASS='external-html' DATA-FILE-ID=SVUIDEX> */
    public static final long serialVersionUID = 1;

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

    /**
     * Constructs an {@code ClosingTagNodeExpectedException} with the specified detail message.
     * @param message the detail message.
     */
    public ClosingTagNodeExpectedException(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 ClosingTagNodeExpectedException(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).
     * 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 ClosingTagNodeExpectedException(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 ClosingTagNodeExpectedException(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."
        );
    } 
}