001 /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 5.0 */
002 /* JavaCCOptions:KEEP_LINE_COL=null */
003 /**
004 * Licensed to the Apache Software Foundation (ASF) under one or more
005 * contributor license agreements. See the NOTICE file distributed with
006 * this work for additional information regarding copyright ownership.
007 * The ASF licenses this file to You under the Apache License, Version 2.0
008 * (the "License"); you may not use this file except in compliance with
009 * the License. You may obtain a copy of the License at
010 *
011 * http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 */
019
020 package org.apache.activemq.selector;
021
022 /**
023 * This exception is thrown when parse errors are encountered.
024 * You can explicitly create objects of this exception type by
025 * calling the method generateParseException in the generated
026 * parser.
027 *
028 * You can modify this class to customize your error reporting
029 * mechanisms so long as you retain the public fields.
030 */
031 public class ParseException extends Exception {
032
033 /**
034 * The version identifier for this Serializable class.
035 * Increment only if the <i>serialized</i> form of the
036 * class changes.
037 */
038 private static final long serialVersionUID = 1L;
039
040 /**
041 * This constructor is used by the method "generateParseException"
042 * in the generated parser. Calling this constructor generates
043 * a new object of this type with the fields "currentToken",
044 * "expectedTokenSequences", and "tokenImage" set.
045 */
046 public ParseException(Token currentTokenVal,
047 int[][] expectedTokenSequencesVal,
048 String[] tokenImageVal
049 )
050 {
051 super(initialise(currentTokenVal, expectedTokenSequencesVal, tokenImageVal));
052 currentToken = currentTokenVal;
053 expectedTokenSequences = expectedTokenSequencesVal;
054 tokenImage = tokenImageVal;
055 }
056
057 /**
058 * The following constructors are for use by you for whatever
059 * purpose you can think of. Constructing the exception in this
060 * manner makes the exception behave in the normal way - i.e., as
061 * documented in the class "Throwable". The fields "errorToken",
062 * "expectedTokenSequences", and "tokenImage" do not contain
063 * relevant information. The JavaCC generated code does not use
064 * these constructors.
065 */
066
067 public ParseException() {
068 super();
069 }
070
071 /** Constructor with message. */
072 public ParseException(String message) {
073 super(message);
074 }
075
076
077 /**
078 * This is the last token that has been consumed successfully. If
079 * this object has been created due to a parse error, the token
080 * followng this token will (therefore) be the first error token.
081 */
082 public Token currentToken;
083
084 /**
085 * Each entry in this array is an array of integers. Each array
086 * of integers represents a sequence of tokens (by their ordinal
087 * values) that is expected at this point of the parse.
088 */
089 public int[][] expectedTokenSequences;
090
091 /**
092 * This is a reference to the "tokenImage" array of the generated
093 * parser within which the parse error occurred. This array is
094 * defined in the generated ...Constants interface.
095 */
096 public String[] tokenImage;
097
098 /**
099 * It uses "currentToken" and "expectedTokenSequences" to generate a parse
100 * error message and returns it. If this object has been created
101 * due to a parse error, and you do not catch it (it gets thrown
102 * from the parser) the correct error message
103 * gets displayed.
104 */
105 private static String initialise(Token currentToken,
106 int[][] expectedTokenSequences,
107 String[] tokenImage) {
108 String eol = System.getProperty("line.separator", "\n");
109 StringBuffer expected = new StringBuffer();
110 int maxSize = 0;
111 for (int i = 0; i < expectedTokenSequences.length; i++) {
112 if (maxSize < expectedTokenSequences[i].length) {
113 maxSize = expectedTokenSequences[i].length;
114 }
115 for (int j = 0; j < expectedTokenSequences[i].length; j++) {
116 expected.append(tokenImage[expectedTokenSequences[i][j]]).append(' ');
117 }
118 if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
119 expected.append("...");
120 }
121 expected.append(eol).append(" ");
122 }
123 String retval = "Encountered \"";
124 Token tok = currentToken.next;
125 for (int i = 0; i < maxSize; i++) {
126 if (i != 0) retval += " ";
127 if (tok.kind == 0) {
128 retval += tokenImage[0];
129 break;
130 }
131 retval += " " + tokenImage[tok.kind];
132 retval += " \"";
133 retval += add_escapes(tok.image);
134 retval += " \"";
135 tok = tok.next;
136 }
137 retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
138 retval += "." + eol;
139 if (expectedTokenSequences.length == 1) {
140 retval += "Was expecting:" + eol + " ";
141 } else {
142 retval += "Was expecting one of:" + eol + " ";
143 }
144 retval += expected.toString();
145 return retval;
146 }
147
148 /**
149 * The end of line string for this machine.
150 */
151 protected String eol = System.getProperty("line.separator", "\n");
152
153 /**
154 * Used to convert raw characters to their escaped version
155 * when these raw version cannot be used as part of an ASCII
156 * string literal.
157 */
158 static String add_escapes(String str) {
159 StringBuffer retval = new StringBuffer();
160 char ch;
161 for (int i = 0; i < str.length(); i++) {
162 switch (str.charAt(i))
163 {
164 case 0 :
165 continue;
166 case '\b':
167 retval.append("\\b");
168 continue;
169 case '\t':
170 retval.append("\\t");
171 continue;
172 case '\n':
173 retval.append("\\n");
174 continue;
175 case '\f':
176 retval.append("\\f");
177 continue;
178 case '\r':
179 retval.append("\\r");
180 continue;
181 case '\"':
182 retval.append("\\\"");
183 continue;
184 case '\'':
185 retval.append("\\\'");
186 continue;
187 case '\\':
188 retval.append("\\\\");
189 continue;
190 default:
191 if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
192 String s = "0000" + Integer.toString(ch, 16);
193 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
194 } else {
195 retval.append(ch);
196 }
197 continue;
198 }
199 }
200 return retval.toString();
201 }
202
203 }
204 /* JavaCC - OriginalChecksum=b9214f06b2c752c7be8d5d26aa9e434d (do not edit this line) */