001: /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 2.1 */
002:
003: /**
004: * Alwin Ibba: Changed package
005: */package org.activemq.selector.mockrunner;
006:
007: /**
008: * This exception is thrown when parse errors are encountered.
009: * You can explicitly create objects of this exception type by
010: * calling the method generateParseException in the generated
011: * parser.
012: * <p/>
013: * You can modify this class to customize your error reporting
014: * mechanisms so long as you retain the public fields.
015: */
016: public class ParseException extends Exception {
017:
018: /**
019: * This constructor is used by the method "generateParseException"
020: * in the generated parser. Calling this constructor generates
021: * a new object of this type with the fields "currentToken",
022: * "expectedTokenSequences", and "tokenImage" set. The boolean
023: * flag "specialConstructor" is also set to true to indicate that
024: * this constructor was used to create this object.
025: * This constructor calls its super class with the empty string
026: * to force the "toString" method of parent class "Throwable" to
027: * print the error message in the form:
028: * ParseException: <result of getMessage>
029: */
030: public ParseException(Token currentTokenVal,
031: int[][] expectedTokenSequencesVal, String[] tokenImageVal) {
032: super ("");
033: specialConstructor = true;
034: currentToken = currentTokenVal;
035: expectedTokenSequences = expectedTokenSequencesVal;
036: tokenImage = tokenImageVal;
037: }
038:
039: /**
040: * The following constructors are for use by you for whatever
041: * purpose you can think of. Constructing the exception in this
042: * manner makes the exception behave in the normal way - i.e., as
043: * documented in the class "Throwable". The fields "errorToken",
044: * "expectedTokenSequences", and "tokenImage" do not contain
045: * relevant information. The JavaCC generated code does not use
046: * these constructors.
047: */
048:
049: public ParseException() {
050: super ();
051: specialConstructor = false;
052: }
053:
054: public ParseException(String message) {
055: super (message);
056: specialConstructor = false;
057: }
058:
059: /**
060: * This variable determines which constructor was used to create
061: * this object and thereby affects the semantics of the
062: * "getMessage" method (see below).
063: */
064: protected boolean specialConstructor;
065:
066: /**
067: * This is the last token that has been consumed successfully. If
068: * this object has been created due to a parse error, the token
069: * followng this token will (therefore) be the first error token.
070: */
071: public Token currentToken;
072:
073: /**
074: * Each entry in this array is an array of integers. Each array
075: * of integers represents a sequence of tokens (by their ordinal
076: * values) that is expected at this point of the parse.
077: */
078: public int[][] expectedTokenSequences;
079:
080: /**
081: * This is a reference to the "tokenImage" array of the generated
082: * parser within which the parse error occurred. This array is
083: * defined in the generated ...Constants interface.
084: */
085: public String[] tokenImage;
086:
087: /**
088: * This method has the standard behavior when this object has been
089: * created using the standard constructors. Otherwise, it uses
090: * "currentToken" and "expectedTokenSequences" to generate a parse
091: * error message and returns it. If this object has been created
092: * due to a parse error, and you do not catch it (it gets thrown
093: * from the parser), then this method is called during the printing
094: * of the final stack trace, and hence the correct error message
095: * gets displayed.
096: */
097: public String getMessage() {
098: if (!specialConstructor) {
099: return super .getMessage();
100: }
101: String expected = "";
102: int maxSize = 0;
103: for (int i = 0; i < expectedTokenSequences.length; i++) {
104: if (maxSize < expectedTokenSequences[i].length) {
105: maxSize = expectedTokenSequences[i].length;
106: }
107: for (int j = 0; j < expectedTokenSequences[i].length; j++) {
108: expected += tokenImage[expectedTokenSequences[i][j]]
109: + " ";
110: }
111: if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
112: expected += "...";
113: }
114: expected += eol + " ";
115: }
116: String retval = "Encountered \"";
117: Token tok = currentToken.next;
118: for (int i = 0; i < maxSize; i++) {
119: if (i != 0) {
120: retval += " ";
121: }
122: if (tok.kind == 0) {
123: retval += tokenImage[0];
124: break;
125: }
126: retval += add_escapes(tok.image);
127: tok = tok.next;
128: }
129: retval += "\" at line " + currentToken.next.beginLine
130: + ", column " + currentToken.next.beginColumn;
131: retval += "." + eol;
132: if (expectedTokenSequences.length == 1) {
133: retval += "Was expecting:" + eol + " ";
134: } else {
135: retval += "Was expecting one of:" + eol + " ";
136: }
137: retval += expected;
138: return retval;
139: }
140:
141: /**
142: * The end of line string for this machine.
143: */
144: protected String eol = System.getProperty("line.separator", "\n");
145:
146: /**
147: * Used to convert raw characters to their escaped version
148: * when these raw version cannot be used as part of an ASCII
149: * string literal.
150: */
151: protected String add_escapes(String str) {
152: StringBuffer retval = new StringBuffer();
153: char ch;
154: for (int i = 0; i < str.length(); i++) {
155: switch (str.charAt(i)) {
156: case 0:
157: continue;
158: case '\b':
159: retval.append("\\b");
160: continue;
161: case '\t':
162: retval.append("\\t");
163: continue;
164: case '\n':
165: retval.append("\\n");
166: continue;
167: case '\f':
168: retval.append("\\f");
169: continue;
170: case '\r':
171: retval.append("\\r");
172: continue;
173: case '\"':
174: retval.append("\\\"");
175: continue;
176: case '\'':
177: retval.append("\\\'");
178: continue;
179: case '\\':
180: retval.append("\\\\");
181: continue;
182: default:
183: if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
184: String s = "0000" + Integer.toString(ch, 16);
185: retval.append("\\u"
186: + s.substring(s.length() - 4, s.length()));
187: } else {
188: retval.append(ch);
189: }
190: continue;
191: }
192: }
193: return retval.toString();
194: }
195:
196: }
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