persistence.antlr.MismatchedCharException Maven / Gradle / Ivy
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package persistence.antlr;
/* ANTLR Translator Generator
* Project led by Terence Parr at http://www.jGuru.com
* Software rights: http://www.antlr.org/license.html
*
* $Id: MismatchedCharException.java,v 1.1 2006/02/08 21:30:53 tware Exp $
*/
import persistence.antlr.collections.impl.BitSet;
public class MismatchedCharException extends RecognitionException {
// Types of chars
public static final int CHAR = 1;
public static final int NOT_CHAR = 2;
public static final int RANGE = 3;
public static final int NOT_RANGE = 4;
public static final int SET = 5;
public static final int NOT_SET = 6;
// One of the above
public int mismatchType;
// what was found on the input stream
public int foundChar;
// For CHAR/NOT_CHAR and RANGE/NOT_RANGE
public int expecting;
// For RANGE/NOT_RANGE (expecting is lower bound of range)
public int upper;
// For SET/NOT_SET
public BitSet set;
// who knows...they may want to ask scanner questions
public CharScanner scanner;
/**
* MismatchedCharException constructor comment.
*/
public MismatchedCharException() {
super("Mismatched char");
}
// Expected range / not range
public MismatchedCharException(char c, char lower, char upper_, boolean matchNot, CharScanner scanner_) {
super("Mismatched char", scanner_.getFilename(), scanner_.getLine(), scanner_.getColumn());
mismatchType = matchNot ? NOT_RANGE : RANGE;
foundChar = c;
expecting = lower;
upper = upper_;
scanner = scanner_;
}
// Expected token / not token
public MismatchedCharException(char c, char expecting_, boolean matchNot, CharScanner scanner_) {
super("Mismatched char", scanner_.getFilename(), scanner_.getLine(), scanner_.getColumn());
mismatchType = matchNot ? NOT_CHAR : CHAR;
foundChar = c;
expecting = expecting_;
scanner = scanner_;
}
// Expected BitSet / not BitSet
public MismatchedCharException(char c, BitSet set_, boolean matchNot, CharScanner scanner_) {
super("Mismatched char", scanner_.getFilename(), scanner_.getLine(), scanner_.getColumn());
mismatchType = matchNot ? NOT_SET : SET;
foundChar = c;
set = set_;
scanner = scanner_;
}
/**
* Returns a clean error message (no line number/column information)
*/
public String getMessage() {
StringBuffer sb = new StringBuffer();
switch (mismatchType) {
case CHAR:
sb.append("expecting "); appendCharName(sb, expecting);
sb.append(", found "); appendCharName(sb, foundChar);
break;
case NOT_CHAR:
sb.append("expecting anything but '");
appendCharName(sb, expecting);
sb.append("'; got it anyway");
break;
case RANGE:
case NOT_RANGE:
sb.append("expecting token ");
if (mismatchType == NOT_RANGE)
sb.append("NOT ");
sb.append("in range: ");
appendCharName(sb, expecting);
sb.append("..");
appendCharName(sb, upper);
sb.append(", found ");
appendCharName(sb, foundChar);
break;
case SET:
case NOT_SET:
sb.append("expecting " + (mismatchType == NOT_SET ? "NOT " : "") + "one of (");
int[] elems = set.toArray();
for (int i = 0; i < elems.length; i++) {
appendCharName(sb, elems[i]);
}
sb.append("), found ");
appendCharName(sb, foundChar);
break;
default :
sb.append(super.getMessage());
break;
}
return sb.toString();
}
/** Append a char to the msg buffer. If special,
* then show escaped version
*/
private void appendCharName(StringBuffer sb, int c) {
switch (c) {
case 65535 :
// 65535 = (char) -1 = EOF
sb.append("''");
break;
case '\n' :
sb.append("'\\n'");
break;
case '\r' :
sb.append("'\\r'");
break;
case '\t' :
sb.append("'\\t'");
break;
default :
sb.append('\'');
sb.append((char) c);
sb.append('\'');
break;
}
}
}