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| package net.sourceforge.pmd.ast; |
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| public class ParseException extends RuntimeException { |
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| public ParseException(Token currentTokenVal,
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| int[][] expectedTokenSequencesVal, |
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| String[] tokenImageVal) { |
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| super("");
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| specialConstructor = true;
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| currentToken = currentTokenVal;
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| expectedTokenSequences = expectedTokenSequencesVal;
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| tokenImage = tokenImageVal;
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| } |
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| public ParseException() {
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| super();
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| specialConstructor = false;
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| } |
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| public ParseException(String message) {
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| super(message);
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| specialConstructor = false;
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| } |
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| protected boolean specialConstructor; |
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| public Token currentToken; |
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| public int[][] expectedTokenSequences; |
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| public String[] tokenImage; |
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| public String getMessage() {
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| if (!specialConstructor) {
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| return super.getMessage();
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| } |
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| StringBuffer expected = new StringBuffer();
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| int maxSize = 0;
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| for (int i = 0; i < expectedTokenSequences.length; i++) {
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| if (maxSize < expectedTokenSequences[i].length) {
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| maxSize = expectedTokenSequences[i].length;
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| } |
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| for (int j = 0; j < expectedTokenSequences[i].length; j++) {
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| expected.append(tokenImage[expectedTokenSequences[i][j]]).append(" ");
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| } |
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| if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
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| expected.append("...");
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| } |
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| expected.append(eol).append(" ");
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| } |
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| String retval = "Encountered \"";
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| Token tok = currentToken.next;
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| for (int i = 0; i < maxSize; i++) {
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| if (i != 0) retval += " ";
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| if (tok.kind == 0) {
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| retval += tokenImage[0];
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| break;
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| } |
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| retval += add_escapes(tok.image);
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| tok = tok.next;
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| } |
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| retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
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| retval += "." + eol;
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| if (expectedTokenSequences.length == 1) {
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| retval += "Was expecting:" + eol + " ";
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| } else { |
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| retval += "Was expecting one of:" + eol + " ";
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| } |
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| retval += expected.toString();
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| return retval;
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| } |
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| protected String eol = System.getProperty("line.separator", "\n"); |
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| protected String add_escapes(String str) {
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| StringBuffer retval = new StringBuffer();
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| char ch;
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| for (int i = 0; i < str.length(); i++) {
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| switch (str.charAt(i)) {
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| case 0:
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| continue;
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| case '\b':
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| retval.append("\\b");
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| continue;
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| case '\t':
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| retval.append("\\t");
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| continue;
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| case '\n':
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| retval.append("\\n");
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| continue;
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| case '\f':
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| retval.append("\\f");
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| continue;
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| case '\r':
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| retval.append("\\r");
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| continue;
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| case '\"':
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| retval.append("\\\"");
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| continue;
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| case '\'':
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| retval.append("\\\'");
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| continue;
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| case '\\':
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| retval.append("\\\\");
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| continue;
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| default:
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| if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
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| String s = "0000" + Integer.toString(ch, 16);
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| retval.append("\\u" + s.substring(s.length() - 4, s.length()));
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| } else { |
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| retval.append(ch);
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| } |
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| continue;
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| } |
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| } |
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| return retval.toString();
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| } |
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| } |