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JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language, Standard ECMA-262 3rd Edition - December 1999. JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, Python, and many others. These properties make JSON an ideal data-interchange language.
package net.minidev.json.parser;
/*
* Copyright 2011 JSON-SMART authors
*
* Licensed 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.
*/
/**
* ParseException explains why and where the error occurs in source JSON text.
*
* @author Uriel Chemouni <[email protected]>
*/
public class ParseException extends Exception {
private static final long serialVersionUID = 8879024178584091857L;
public static final int ERROR_UNEXPECTED_CHAR = 0;
public static final int ERROR_UNEXPECTED_TOKEN = 1;
public static final int ERROR_UNEXPECTED_EXCEPTION = 2;
public static final int ERROR_UNEXPECTED_EOF = 3;
public static final int ERROR_UNEXPECTED_UNICODE = 4;
public static final int ERROR_UNEXPECTED_DUPLICATE_KEY = 5;
public static final int ERROR_UNEXPECTED_LEADING_0 = 6;
private int errorType;
private Object unexpectedObject;
private int position;
public ParseException(int position, int errorType, Object unexpectedObject) {
super(toMessage(position, errorType, unexpectedObject));
this.position = position;
this.errorType = errorType;
this.unexpectedObject = unexpectedObject;
}
public ParseException(int position, Throwable cause) {
super(toMessage(position, ERROR_UNEXPECTED_EXCEPTION, cause), cause);
this.position = position;
this.errorType = ERROR_UNEXPECTED_EXCEPTION;
this.unexpectedObject = cause;
}
public int getErrorType() {
return errorType;
}
/**
* @return The character position (starting with 0) of the input where the
* error occurs.
*/
public int getPosition() {
return position;
}
/**
* @return One of the following base on the value of errorType:
* ERROR_UNEXPECTED_CHAR java.lang.Character ERROR_UNEXPECTED_TOKEN
* ERROR_UNEXPECTED_EXCEPTION java.lang.Exception
*/
public Object getUnexpectedObject() {
return unexpectedObject;
}
private static String toMessage(int position, int errorType, Object unexpectedObject) {
StringBuilder sb = new StringBuilder();
if (errorType == ERROR_UNEXPECTED_CHAR) {
sb.append("Unexpected character (");
sb.append(unexpectedObject);
sb.append(") at position ");
sb.append(position);
sb.append(".");
} else if (errorType == ERROR_UNEXPECTED_TOKEN) {
sb.append("Unexpected token ");
sb.append(unexpectedObject);
sb.append(" at position ");
sb.append(position);
sb.append(".");
} else if (errorType == ERROR_UNEXPECTED_EXCEPTION) {
sb.append("Unexpected exception ");
sb.append(unexpectedObject);
sb.append(" occur at position ");
sb.append(position);
sb.append(".");
} else if (errorType == ERROR_UNEXPECTED_EOF) {
sb.append("Unexpected End Of File position ");
sb.append(position);
sb.append(": ");
sb.append(unexpectedObject);
} else if (errorType == ERROR_UNEXPECTED_UNICODE) {
sb.append("Unexpected unicode escape sequence ");
sb.append(unexpectedObject);
sb.append(" at position ");
sb.append(position);
sb.append(".");
} else if (errorType == ERROR_UNEXPECTED_DUPLICATE_KEY) {
sb.append("Unexpected duplicate key:");
sb.append(unexpectedObject);
sb.append(" at position ");
sb.append(position);
sb.append(".");
} else if (errorType == ERROR_UNEXPECTED_LEADING_0) {
sb.append("Unexpected leading 0 in digit for token:");
sb.append(unexpectedObject);
sb.append(" at position ");
sb.append(position);
sb.append(".");
} else {
sb.append("Unkown error at position ");
sb.append(position);
sb.append(".");
}
return sb.toString();
}
}