tokenmgrerror.java

一个对等计算发生器

/* Generated By:JavaCC: Do not edit this line. TokenMgrError.java Version 3.0 */
package de.uniba.wiai.lspi.util.console.parser;

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

	/**
	 * 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
	 * 
	 * @param str
	 * @return 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.
	 */
	protected static 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.
	 */
	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);
	}
}