001 /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 5.0 */
002 /* JavaCCOptions:KEEP_LINE_COL=null */
003 package org.apache.commons.ognl;
004
005 /**
006 * This exception is thrown when parse errors are encountered.
007 * You can explicitly create objects of this exception type by
008 * calling the method generateParseException in the generated
009 * parser.
010 *
011 * You can modify this class to customize your error reporting
012 * mechanisms so long as you retain the public fields.
013 */
014 public class ParseException extends Exception {
015
016 /**
017 * The version identifier for this Serializable class.
018 * Increment only if the <i>serialized</i> form of the
019 * class changes.
020 */
021 private static final long serialVersionUID = 1L;
022
023 /**
024 * This constructor is used by the method "generateParseException"
025 * in the generated parser. Calling this constructor generates
026 * a new object of this type with the fields "currentToken",
027 * "expectedTokenSequences", and "tokenImage" set.
028 */
029 public ParseException(Token currentTokenVal,
030 int[][] expectedTokenSequencesVal,
031 String[] tokenImageVal
032 )
033 {
034 super(initialise(currentTokenVal, expectedTokenSequencesVal, tokenImageVal));
035 currentToken = currentTokenVal;
036 expectedTokenSequences = expectedTokenSequencesVal;
037 tokenImage = tokenImageVal;
038 }
039
040 /**
041 * The following constructors are for use by you for whatever
042 * purpose you can think of. Constructing the exception in this
043 * manner makes the exception behave in the normal way - i.e., as
044 * documented in the class "Throwable". The fields "errorToken",
045 * "expectedTokenSequences", and "tokenImage" do not contain
046 * relevant information. The JavaCC generated code does not use
047 * these constructors.
048 */
049
050 public ParseException() {
051 super();
052 }
053
054 /** Constructor with message. */
055 public ParseException(String message) {
056 super(message);
057 }
058
059
060 /**
061 * This is the last token that has been consumed successfully. If
062 * this object has been created due to a parse error, the token
063 * followng this token will (therefore) be the first error token.
064 */
065 public Token currentToken;
066
067 /**
068 * Each entry in this array is an array of integers. Each array
069 * of integers represents a sequence of tokens (by their ordinal
070 * values) that is expected at this point of the parse.
071 */
072 public int[][] expectedTokenSequences;
073
074 /**
075 * This is a reference to the "tokenImage" array of the generated
076 * parser within which the parse error occurred. This array is
077 * defined in the generated ...Constants interface.
078 */
079 public String[] tokenImage;
080
081 /**
082 * It uses "currentToken" and "expectedTokenSequences" to generate a parse
083 * error message and returns it. If this object has been created
084 * due to a parse error, and you do not catch it (it gets thrown
085 * from the parser) the correct error message
086 * gets displayed.
087 */
088 private static String initialise(Token currentToken,
089 int[][] expectedTokenSequences,
090 String[] tokenImage) {
091 String eol = System.getProperty("line.separator", "\n");
092 StringBuffer expected = new StringBuffer();
093 int maxSize = 0;
094 for (int i = 0; i < expectedTokenSequences.length; i++) {
095 if (maxSize < expectedTokenSequences[i].length) {
096 maxSize = expectedTokenSequences[i].length;
097 }
098 for (int j = 0; j < expectedTokenSequences[i].length; j++) {
099 expected.append(tokenImage[expectedTokenSequences[i][j]]).append(' ');
100 }
101 if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
102 expected.append("...");
103 }
104 expected.append(eol).append(" ");
105 }
106 String retval = "Encountered \"";
107 Token tok = currentToken.next;
108 for (int i = 0; i < maxSize; i++) {
109 if (i != 0) retval += " ";
110 if (tok.kind == 0) {
111 retval += tokenImage[0];
112 break;
113 }
114 retval += " " + tokenImage[tok.kind];
115 retval += " \"";
116 retval += add_escapes(tok.image);
117 retval += " \"";
118 tok = tok.next;
119 }
120 retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
121 retval += "." + eol;
122 if (expectedTokenSequences.length == 1) {
123 retval += "Was expecting:" + eol + " ";
124 } else {
125 retval += "Was expecting one of:" + eol + " ";
126 }
127 retval += expected.toString();
128 return retval;
129 }
130
131 /**
132 * The end of line string for this machine.
133 */
134 protected String eol = System.getProperty("line.separator", "\n");
135
136 /**
137 * Used to convert raw characters to their escaped version
138 * when these raw version cannot be used as part of an ASCII
139 * string literal.
140 */
141 static String add_escapes(String str) {
142 StringBuffer retval = new StringBuffer();
143 char ch;
144 for (int i = 0; i < str.length(); i++) {
145 switch (str.charAt(i))
146 {
147 case 0 :
148 continue;
149 case '\b':
150 retval.append("\\b");
151 continue;
152 case '\t':
153 retval.append("\\t");
154 continue;
155 case '\n':
156 retval.append("\\n");
157 continue;
158 case '\f':
159 retval.append("\\f");
160 continue;
161 case '\r':
162 retval.append("\\r");
163 continue;
164 case '\"':
165 retval.append("\\\"");
166 continue;
167 case '\'':
168 retval.append("\\\'");
169 continue;
170 case '\\':
171 retval.append("\\\\");
172 continue;
173 default:
174 if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
175 String s = "0000" + Integer.toString(ch, 16);
176 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
177 } else {
178 retval.append(ch);
179 }
180 continue;
181 }
182 }
183 return retval.toString();
184 }
185
186 }
187 /* JavaCC - OriginalChecksum=8b86d6ca771ad72d019c9024e473d350 (do not edit this line) */