001: /*
002: * Licensed to the Apache Software Foundation (ASF) under one or more
003: * contributor license agreements. See the NOTICE file distributed with
004: * this work for additional information regarding copyright ownership.
005: * The ASF licenses this file to You under the Apache License, Version 2.0
006: * (the "License"); you may not use this file except in compliance with
007: * the License. You may obtain a copy of the License at
008: *
009: * http://www.apache.org/licenses/LICENSE-2.0
010: *
011: * Unless required by applicable law or agreed to in writing, software
012: * distributed under the License is distributed on an "AS IS" BASIS,
013: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014: * See the License for the specific language governing permissions and
015: * limitations under the License.
016: */
017: /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 3.0 */
018:
019: package org.apache.harmony.jndi.provider.ldap.parser;
020:
021: /**
022: * This exception is thrown when parse errors are encountered.
023: * You can explicitly create objects of this exception type by
024: * calling the method generateParseException in the generated
025: * parser.
026: *
027: * You can modify this class to customize your error reporting
028: * mechanisms so long as you retain the public fields.
029: */
030: public class ParseException extends Exception {
031:
032: /**
033: * This constructor is used by the method "generateParseException"
034: * in the generated parser. Calling this constructor generates
035: * a new object of this type with the fields "currentToken",
036: * "expectedTokenSequences", and "tokenImage" set. The boolean
037: * flag "specialConstructor" is also set to true to indicate that
038: * this constructor was used to create this object.
039: * This constructor calls its super class with the empty string
040: * to force the "toString" method of parent class "Throwable" to
041: * print the error message in the form:
042: * ParseException: <result of getMessage>
043: */
044: public ParseException(Token currentTokenVal,
045: int[][] expectedTokenSequencesVal, String[] tokenImageVal) {
046: super ("");
047: specialConstructor = true;
048: currentToken = currentTokenVal;
049: expectedTokenSequences = expectedTokenSequencesVal;
050: tokenImage = tokenImageVal;
051: }
052:
053: /**
054: * The following constructors are for use by you for whatever
055: * purpose you can think of. Constructing the exception in this
056: * manner makes the exception behave in the normal way - i.e., as
057: * documented in the class "Throwable". The fields "errorToken",
058: * "expectedTokenSequences", and "tokenImage" do not contain
059: * relevant information. The JavaCC generated code does not use
060: * these constructors.
061: */
062:
063: public ParseException() {
064: super ();
065: specialConstructor = false;
066: }
067:
068: public ParseException(String message) {
069: super (message);
070: specialConstructor = false;
071: }
072:
073: /**
074: * This variable determines which constructor was used to create
075: * this object and thereby affects the semantics of the
076: * "getMessage" method (see below).
077: */
078: protected boolean specialConstructor;
079:
080: /**
081: * This is the last token that has been consumed successfully. If
082: * this object has been created due to a parse error, the token
083: * followng this token will (therefore) be the first error token.
084: */
085: public Token currentToken;
086:
087: /**
088: * Each entry in this array is an array of integers. Each array
089: * of integers represents a sequence of tokens (by their ordinal
090: * values) that is expected at this point of the parse.
091: */
092: public int[][] expectedTokenSequences;
093:
094: /**
095: * This is a reference to the "tokenImage" array of the generated
096: * parser within which the parse error occurred. This array is
097: * defined in the generated ...Constants interface.
098: */
099: public String[] tokenImage;
100:
101: /**
102: * This method has the standard behavior when this object has been
103: * created using the standard constructors. Otherwise, it uses
104: * "currentToken" and "expectedTokenSequences" to generate a parse
105: * error message and returns it. If this object has been created
106: * due to a parse error, and you do not catch it (it gets thrown
107: * from the parser), then this method is called during the printing
108: * of the final stack trace, and hence the correct error message
109: * gets displayed.
110: */
111: public String getMessage() {
112: if (!specialConstructor) {
113: return super .getMessage();
114: }
115: String expected = "";
116: int maxSize = 0;
117: for (int i = 0; i < expectedTokenSequences.length; i++) {
118: if (maxSize < expectedTokenSequences[i].length) {
119: maxSize = expectedTokenSequences[i].length;
120: }
121: for (int j = 0; j < expectedTokenSequences[i].length; j++) {
122: expected += tokenImage[expectedTokenSequences[i][j]]
123: + " ";
124: }
125: if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
126: expected += "...";
127: }
128: expected += eol + " ";
129: }
130: String retval = "Encountered \"";
131: Token tok = currentToken.next;
132: for (int i = 0; i < maxSize; i++) {
133: if (i != 0)
134: retval += " ";
135: if (tok.kind == 0) {
136: retval += tokenImage[0];
137: break;
138: }
139: retval += add_escapes(tok.image);
140: tok = tok.next;
141: }
142: retval += "\" at line " + currentToken.next.beginLine
143: + ", column " + currentToken.next.beginColumn;
144: retval += "." + eol;
145: if (expectedTokenSequences.length == 1) {
146: retval += "Was expecting:" + eol + " ";
147: } else {
148: retval += "Was expecting one of:" + eol + " ";
149: }
150: retval += expected;
151: return retval;
152: }
153:
154: /**
155: * The end of line string for this machine.
156: */
157: protected String eol = System.getProperty("line.separator", "\n");
158:
159: /**
160: * Used to convert raw characters to their escaped version
161: * when these raw version cannot be used as part of an ASCII
162: * string literal.
163: */
164: protected String add_escapes(String str) {
165: StringBuffer retval = new StringBuffer();
166: char ch;
167: for (int i = 0; i < str.length(); i++) {
168: switch (str.charAt(i)) {
169: case 0:
170: continue;
171: case '\b':
172: retval.append("\\b");
173: continue;
174: case '\t':
175: retval.append("\\t");
176: continue;
177: case '\n':
178: retval.append("\\n");
179: continue;
180: case '\f':
181: retval.append("\\f");
182: continue;
183: case '\r':
184: retval.append("\\r");
185: continue;
186: case '\"':
187: retval.append("\\\"");
188: continue;
189: case '\'':
190: retval.append("\\\'");
191: continue;
192: case '\\':
193: retval.append("\\\\");
194: continue;
195: default:
196: if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
197: String s = "0000" + Integer.toString(ch, 16);
198: retval.append("\\u"
199: + s.substring(s.length() - 4, s.length()));
200: } else {
201: retval.append(ch);
202: }
203: continue;
204: }
205: }
206: return retval.toString();
207: }
208:
209: }
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