michael@0: package org.json.simple.parser;
michael@0: 
michael@0: /**
michael@0:  * ParseException explains why and where the error occurs in source JSON text.
michael@0:  * 
michael@0:  * @author FangYidong<fangyidong@yahoo.com.cn>
michael@0:  *
michael@0:  */
michael@0: public class ParseException extends Exception {
michael@0: 	private static final long serialVersionUID = -7880698968187728548L;
michael@0: 	
michael@0: 	public static final int ERROR_UNEXPECTED_CHAR = 0;
michael@0: 	public static final int ERROR_UNEXPECTED_TOKEN = 1;
michael@0: 	public static final int ERROR_UNEXPECTED_EXCEPTION = 2;
michael@0: 
michael@0: 	private int errorType;
michael@0: 	private Object unexpectedObject;
michael@0: 	private int position;
michael@0: 	
michael@0: 	public ParseException(int errorType){
michael@0: 		this(-1, errorType, null);
michael@0: 	}
michael@0: 	
michael@0: 	public ParseException(int errorType, Object unexpectedObject){
michael@0: 		this(-1, errorType, unexpectedObject);
michael@0: 	}
michael@0: 	
michael@0: 	public ParseException(int position, int errorType, Object unexpectedObject){
michael@0: 		this.position = position;
michael@0: 		this.errorType = errorType;
michael@0: 		this.unexpectedObject = unexpectedObject;
michael@0: 	}
michael@0: 	
michael@0: 	public int getErrorType() {
michael@0: 		return errorType;
michael@0: 	}
michael@0: 	
michael@0: 	public void setErrorType(int errorType) {
michael@0: 		this.errorType = errorType;
michael@0: 	}
michael@0: 	
michael@0: 	/**
michael@0: 	 * @see org.json.simple.parser.JSONParser#getPosition()
michael@0: 	 * 
michael@0: 	 * @return The character position (starting with 0) of the input where the error occurs.
michael@0: 	 */
michael@0: 	public int getPosition() {
michael@0: 		return position;
michael@0: 	}
michael@0: 	
michael@0: 	public void setPosition(int position) {
michael@0: 		this.position = position;
michael@0: 	}
michael@0: 	
michael@0: 	/**
michael@0: 	 * @see org.json.simple.parser.Yytoken
michael@0: 	 * 
michael@0: 	 * @return One of the following base on the value of errorType:
michael@0: 	 * 		   	ERROR_UNEXPECTED_CHAR		java.lang.Character
michael@0: 	 * 			ERROR_UNEXPECTED_TOKEN		org.json.simple.parser.Yytoken
michael@0: 	 * 			ERROR_UNEXPECTED_EXCEPTION	java.lang.Exception
michael@0: 	 */
michael@0: 	public Object getUnexpectedObject() {
michael@0: 		return unexpectedObject;
michael@0: 	}
michael@0: 	
michael@0: 	public void setUnexpectedObject(Object unexpectedObject) {
michael@0: 		this.unexpectedObject = unexpectedObject;
michael@0: 	}
michael@0: 	
michael@0: 	public String toString(){
michael@0: 		StringBuffer sb = new StringBuffer();
michael@0: 		
michael@0: 		switch(errorType){
michael@0: 		case ERROR_UNEXPECTED_CHAR:
michael@0: 			sb.append("Unexpected character (").append(unexpectedObject).append(") at position ").append(position).append(".");
michael@0: 			break;
michael@0: 		case ERROR_UNEXPECTED_TOKEN:
michael@0: 			sb.append("Unexpected token ").append(unexpectedObject).append(" at position ").append(position).append(".");
michael@0: 			break;
michael@0: 		case ERROR_UNEXPECTED_EXCEPTION:
michael@0: 			sb.append("Unexpected exception at position ").append(position).append(": ").append(unexpectedObject);
michael@0: 			break;
michael@0: 		default:
michael@0: 			sb.append("Unkown error at position ").append(position).append(".");
michael@0: 			break;
michael@0: 		}
michael@0: 		return sb.toString();
michael@0: 	}
michael@0: }