| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.kernel.jpql; |
| |
| import java.util.TreeSet; |
| |
| import org.apache.openjpa.lib.util.Localizer; |
| import org.apache.openjpa.lib.util.Localizer.Message; |
| import org.apache.openjpa.util.UserException; |
| |
| /** |
| * Signifies that a lexical error occurred when parsing the JPQL statement. |
| * |
| * @author Marc Prud'hommeaux |
| */ |
| public class ParseException |
| extends UserException { |
| |
| private static final Localizer _loc = |
| Localizer.forPackage(ParseException.class); |
| |
| /** |
| * This constructor is used by the method "generateParseException" |
| * in the generated parser. Calling this constructor generates |
| * a new object of this type with the fields "currentToken", |
| * "expectedTokenSequences", and "tokenImage" set. |
| * This constructor calls its super class with the empty string |
| * to force the "toString" method of parent class "Throwable" to |
| * print the error message in the form: |
| * ParseException: <result of getMessage> |
| */ |
| public ParseException(Token currentTokenVal, |
| int[][]expectedTokenSequencesVal, String[]tokenImageVal) { |
| super(initMessage(currentTokenVal, |
| expectedTokenSequencesVal, tokenImageVal)); |
| } |
| |
| /** |
| * The following constructors are for use by you for whatever |
| * purpose you can think of. Constructing the exception in this |
| * manner makes the exception behave in the normal way - i.e., as |
| * documented in the class "Throwable". The fields "errorToken", |
| * "expectedTokenSequences", and "tokenImage" do not contain |
| * relevant information. The JavaCC generated code does not use |
| * these constructors. |
| */ |
| public ParseException() { |
| super(); |
| } |
| |
| /** |
| * String constructor. Constructing the exception in this |
| * manner makes the exception behave in the normal way - i.e., as |
| * documented in the class "Throwable". The fields "errorToken", |
| * "expectedTokenSequences", and "tokenImage" do not contain |
| * relevant information. The JavaCC generated code does not use |
| * these constructors. |
| */ |
| public ParseException(String message) { |
| super(message); |
| } |
| |
| public ParseException(String message, Throwable t) { |
| super(message, t); |
| } |
| |
| /** |
| * This method has the standard behavior when this object has been |
| * created using the standard constructors. Otherwise, it uses |
| * "currentToken" and "expectedTokenSequences" to generate a parse |
| * error message and returns it. If this object has been created |
| * due to a parse error, and you do not catch it (it gets thrown |
| * from the parser), then this method is called during the printing |
| * of the final stack trace, and hence the correct error message |
| * gets displayed. |
| */ |
| private static Message initMessage(Token currentToken, |
| int[][]expectedTokenSequences, String[]tokenImage) { |
| TreeSet expected = new TreeSet(); |
| |
| int maxSize = 0; |
| |
| for (int i = 0; i < expectedTokenSequences.length; i++) { |
| if (maxSize < expectedTokenSequences[i].length) |
| maxSize = expectedTokenSequences[i].length; |
| |
| for (int j = 0; j < expectedTokenSequences[i].length; j++) |
| expected.add(tokenImage[expectedTokenSequences[i][j]]); |
| } |
| |
| Token tok = currentToken.next; |
| |
| StringBuffer curtokBuf = new StringBuffer(); |
| for (int i = 0; i < maxSize; i++) { |
| if (i != 0) |
| curtokBuf.append(" "); |
| if (tok.kind == 0) { |
| curtokBuf.append(tokenImage[0]); |
| break; |
| } |
| |
| curtokBuf.append(escape(tok.image)); |
| tok = tok.next; |
| } |
| String curtok = curtokBuf.toString(); |
| |
| return _loc.get("bad-parse", new Object[]{ curtok, |
| Integer.valueOf(currentToken.next.beginColumn), expected }); |
| } |
| |
| /** |
| * Used to convert raw characters to their escaped version |
| * when these raw version cannot be used as part of an ASCII string literal. |
| */ |
| private static String escape(String str) { |
| StringBuffer retval = new StringBuffer(); |
| char ch; |
| |
| for (int i = 0; i < str.length(); i++) { |
| switch (str.charAt(i)) { |
| case 0: |
| continue; |
| case '\b': |
| retval.append("\\b"); |
| continue; |
| case '\t': |
| retval.append("\\t"); |
| continue; |
| case '\n': |
| retval.append("\\n"); |
| continue; |
| case '\f': |
| retval.append("\\f"); |
| continue; |
| case '\r': |
| retval.append("\\r"); |
| continue; |
| case '\"': |
| retval.append("\\\""); |
| continue; |
| case '\'': |
| retval.append("\\\'"); |
| continue; |
| case '\\': |
| retval.append("\\\\"); |
| continue; |
| default: |
| if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) { |
| String s = "0000" + Integer.toString(ch, 16); |
| |
| retval.append("\\u" + s.substring(s.length() - 4, |
| s.length())); |
| } else { |
| retval.append(ch); |
| } |
| continue; |
| } |
| } |
| return retval.toString(); |
| } |
| |
| } |