src/org/json/simple/parser/ParseException.java

   1 package org.json.simple.parser;
   2
   3 /**
   4  * ParseException explains why and where the error occurs in source JSON text.
   5  *
   6  * @author FangYidong<fangyidong@yahoo.com.cn>
   7  *
   8  */
   9 public class ParseException extends Exception {
  10         private static final long serialVersionUID = -7880698968187728547L;
  11
  12         public static final int ERROR_UNEXPECTED_CHAR = 0;
  13         public static final int ERROR_UNEXPECTED_TOKEN = 1;
  14         public static final int ERROR_UNEXPECTED_EXCEPTION = 2;
  15
  16         private int errorType;
  17         private Object unexpectedObject;
  18         private int position;
  19
  20         public ParseException(int errorType){
  21                 this(-1, errorType, null);
  22         }
  23
  24         public ParseException(int errorType, Object unexpectedObject){
  25                 this(-1, errorType, unexpectedObject);
  26         }
  27
  28         public ParseException(int position, int errorType, Object unexpectedObject){
  29                 this.position = position;
  30                 this.errorType = errorType;
  31                 this.unexpectedObject = unexpectedObject;
  32         }
  33
  34         public int getErrorType() {
  35                 return errorType;
  36         }
  37
  38         public void setErrorType(int errorType) {
  39                 this.errorType = errorType;
  40         }
  41
  42         /**
  43          * @see org.json.simple.parser.JSONParser#getPosition()
  44          *
  45          * @return The character position (starting with 0) of the input where the error occurs.
  46          */
  47         public int getPosition() {
  48                 return position;
  49         }
  50
  51         public void setPosition(int position) {
  52                 this.position = position;
  53         }
  54
  55         /**
  56          * @see org.json.simple.parser.Yytoken
  57          *
  58          * @return One of the following base on the value of errorType:
  59          *                      ERROR_UNEXPECTED_CHAR           java.lang.Character
  60          *                      ERROR_UNEXPECTED_TOKEN          org.json.simple.parser.Yytoken
  61          *                      ERROR_UNEXPECTED_EXCEPTION      java.lang.Exception
  62          */
  63         public Object getUnexpectedObject() {
  64                 return unexpectedObject;
  65         }
  66
  67         public void setUnexpectedObject(Object unexpectedObject) {
  68                 this.unexpectedObject = unexpectedObject;
  69         }
  70
  71         public String getMessage() {
  72                 StringBuffer sb = new StringBuffer();
  73
  74                 switch(errorType){
  75                 case ERROR_UNEXPECTED_CHAR:
  76                         sb.append("Unexpected character (").append(unexpectedObject).append(") at position ").append(position).append(".");
  77                         break;
  78                 case ERROR_UNEXPECTED_TOKEN:
  79                         sb.append("Unexpected token ").append(unexpectedObject).append(" at position ").append(position).append(".");
  80                         break;
  81                 case ERROR_UNEXPECTED_EXCEPTION:
  82                         sb.append("Unexpected exception at position ").append(position).append(": ").append(unexpectedObject);
  83                         break;
  84                 default:
  85                         sb.append("Unkown error at position ").append(position).append(".");
  86                         break;
  87                 }
  88                 return sb.toString();
  89         }
  90 }