/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 0.7pre2 */
package gnu.prolog.io.parser.gen;

public class TokenMgrError extends Error
{
	/*
	 * Ordinals for various reasons why an Error of this type can be thrown.
	 */

	/**
	 *
	 */
	private static final long serialVersionUID = 5317453263514109784L;

	/**
	 * Lexical error occured.
	 */
	static final int LEXICAL_ERROR = 0;

	/**
	 * An attempt wass made to create a second instance of a static token manager.
	 */
	static final int STATIC_LEXER_ERROR = 1;

	/**
	 * Tried to change to an invalid lexical state.
	 */
	static final int INVALID_LEXICAL_STATE = 2;

	/**
	 * Detected (and bailed out of) an infinite loop in the token manager.
	 */
	static final int LOOP_DETECTED = 3;

	/**
	 * Indicates the reason why the exception is thrown. It will have one of the
	 * above 4 values.
	 */
	int errorCode;

	/**
	 * Replaces unprintable characters by their espaced (or unicode escaped)
	 * equivalents in the given string
	 */
	protected static final String addEscapes(String str)
	{
		StringBuffer retval = new StringBuffer();
		char ch;
		for (int i = 0; i < str.length(); i++)
		{
			switch (str.charAt(i))
			{
				case 0:
					continue;
				case '\b':
					retval.append("\\b");
					continue;
				case '\t':
					retval.append("\\t");
					continue;
				case '\n':
					retval.append("\\n");
					continue;
				case '\f':
					retval.append("\\f");
					continue;
				case '\r':
					retval.append("\\r");
					continue;
				case '\"':
					retval.append("\\\"");
					continue;
				case '\'':
					retval.append("\\\'");
					continue;
				case '\\':
					retval.append("\\\\");
					continue;
				default:
					if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e)
					{
						String s = "0000" + Integer.toString(ch, 16);
						retval.append("\\u" + s.substring(s.length() - 4, s.length()));
					}
					else
					{
						retval.append(ch);
					}
					continue;
			}
		}
		return retval.toString();
	}

	/**
	 * Returns a detailed message for the Error when it is thrown by the token
	 * manager to indicate a lexical error. Parameters : EOFSeen : indicates if
	 * EOF caused the lexicl error curLexState : lexical state in which this error
	 * occured errorLine : line number when the error occured errorColumn : column
	 * number when the error occured errorAfter : prefix that was seen before this
	 * error occured curchar : the offending character Note: You can customize the
	 * lexical error message by modifying this method.
	 */
	private static final String LexicalError(boolean EOFSeen, int lexState, int errorLine, int errorColumn,
			String errorAfter, char curChar)
	{
		return "Lexical error at line " + errorLine + ", column " + errorColumn + ".  Encountered: "
				+ (EOFSeen ? "<EOF> " : "\"" + addEscapes(String.valueOf(curChar)) + "\"" + " (" + (int) curChar + "), ")
				+ "after : \"" + addEscapes(errorAfter) + "\"";
	}

	/**
	 * You can also modify the body of this method to customize your error
	 * messages. For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE
	 * are not of end-users concern, so you can return something like :
	 *
	 * "Internal Error : Please file a bug report .... "
	 *
	 * from this method for such cases in the release version of your parser.
	 */
	@Override
	public String getMessage()
	{
		return super.getMessage();
	}

	/*
	 * Constructors of various flavors follow.
	 */

	public TokenMgrError()
	{}

	public TokenMgrError(String message, int reason)
	{
		super(message);
		errorCode = reason;
	}

	public TokenMgrError(boolean EOFSeen, int lexState, int errorLine, int errorColumn, String errorAfter, char curChar,
			int reason)
	{
		this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
	}
}
