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 package org.apache.camel.language.simple.types; 018 019 import org.apache.camel.ExpressionIllegalSyntaxException; 020 021 /** 022 * Syntax error in the simple language expression. 023 */ 024 public class SimpleIllegalSyntaxException extends ExpressionIllegalSyntaxException { 025 private static final long serialVersionUID = 1L; 026 private final int index; 027 private final String message; 028 029 public SimpleIllegalSyntaxException(String expression, int index, String message) { 030 super(expression); 031 this.index = index; 032 this.message = message; 033 } 034 035 public SimpleIllegalSyntaxException(String expression, int index, String message, Throwable cause) { 036 super(expression, cause); 037 this.index = index; 038 this.message = message; 039 } 040 041 /** 042 * Index where the parsing error occurred 043 * 044 * @return index of the parsing error in the input, returns <tt>-1</tt> if the cause of the problem 045 * is not applicable to specific index in the input 046 */ 047 public int getIndex() { 048 return index; 049 } 050 051 @Override 052 public String getMessage() { 053 if (message == null) { 054 return "[null]"; 055 } 056 057 StringBuilder sb = new StringBuilder(message); 058 if (index > -1) { 059 sb.append(" at location ").append(index); 060 // create a nice looking message with indicator where the problem is 061 sb.append("\n").append(getExpression()).append("\n"); 062 for (int i = 0; i < index; i++) { 063 sb.append(" "); 064 } 065 sb.append("*\n"); 066 } 067 return sb.toString(); 068 } 069 070 }