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108 | package Torello.HTML;
/**
* Used when an invalid, non-HTML, tag or token has been passed to a method.
*
* <BR /><BR />For instance, if a programmer accidentally passes the characters {@code 'DVI'},
* instead of {@code 'DIV'}, to a method that accepts HTML tokens / tags, then this exception
* would throw.
*/
public class HTMLTokException extends IllegalArgumentException
{
/** <EMBED CLASS='external-html' DATA-FILE-ID=SVUIDEX> */
public static final long serialVersionUID = 1;
/** Constructs an {@code HTMLTokException} with no detail message. */
public HTMLTokException()
{ super(); }
/**
* Constructs an {@code HTMLTokException} with the specified detail message.
* @param message the detail message.
*/
public HTMLTokException(String message)
{ super(message); }
/**
* Constructs a new exception with the specified detail message and cause.
*
* <BR /><BR /><DIV CLASS=JDHint>
* <B STYLE='color:red;'>Note:</B> The detail message associated with cause is not
* automatically incorporated into this exception's detail message.
* </DIV>
*
* @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 non-existent or unknown.)
*/
public HTMLTokException(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 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 HTMLTokException(Throwable cause)
{ super(cause); }
/**
* This just checks if the passed HTML tok(s) is a valid HTML-element, for instance:
* {@code img, div, p, a, b, h1, h2, h3} etc...
*
* <BR /><BR />It throws an HTMLTokException if an "invalid-{@code String}" is passed.
*
* @param htmlTags This may be any Java String (or strings), but only Java-String's that are
* found to be valid HTML 4 or 5 tags will be accepted.
*
* <BR /><BR /><B>NOTE:</B> Obviously, the '...' notation means multiple tags may be tested.
* If one is found invalid, an exception is immediately thrown.
*
* @throws HTMLTokException if the value passed in the tok parameter is not found in the
* {@code HTMLTags.isTag(tok);} hashtable.
*/
public static void check(String... htmlTags)
{
if (htmlTags.length == 0)
throw new HTMLTokException
("You have passed zero arguments to the variable-length parameter 'htmlTags'");
else if (htmlTags.length == 1)
{
if (htmlTags[0] == null)
throw new NullPointerException(
"You have passed null for the value of HTML Tag/Token here, " +
"but this is not allowed."
);
if (! HTMLTags.isTag(htmlTags[0])) throw new HTMLTokException
("The HTML-Element provided isn't valid! tok = [" + htmlTags[0] + "]");
}
else
{
String tok;
for (int i=0; i < htmlTags.length; i++)
if ((tok = htmlTags[i]) == null)
throw new NullPointerException(
"You have passed multiple HTML Tokens, but one of them was null " +
"(param #" + i + "). This is not allowed"
);
else if (! HTMLTags.isTag(tok))
throw new HTMLTokException(
"You have passed multiple HTML Tokens, but one of them isn't valid! " +
"(param #" + i + "), tok = [" + tok + "]"
);
}
}
}
|