| using System; |
| #if FEATURE_SERIALIZABLE_EXCEPTIONS |
| using System.Runtime.Serialization; |
| using System.Security.Permissions; |
| #endif |
| using System.Text; |
| |
| namespace Lucene.Net.QueryParsers.Classic |
| { |
| /* |
| * 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. |
| */ |
| |
| /// <summary>Token Manager Error. </summary> |
| // LUCENENET: It is no longer good practice to use binary serialization. |
| // See: https://github.com/dotnet/corefx/issues/23584#issuecomment-325724568 |
| #if FEATURE_SERIALIZABLE_EXCEPTIONS |
| [Serializable] |
| #endif |
| public class TokenMgrError : Exception |
| { |
| /* |
| * Ordinals for various reasons why an Error of this type can be thrown. |
| */ |
| |
| /// <summary> Lexical error occurred.</summary> |
| internal static readonly int LEXICAL_ERROR = 0; |
| |
| /// <summary> An attempt was made to create a second instance of a static token manager.</summary> |
| internal static readonly int STATIC_LEXER_ERROR = 1; |
| |
| /// <summary> Tried to change to an invalid lexical state.</summary> |
| internal static readonly int INVALID_LEXICAL_STATE = 2; |
| |
| /// <summary> Detected (and bailed out of) an infinite loop in the token manager.</summary> |
| internal static readonly int LOOP_DETECTED = 3; |
| |
| /// <summary> Indicates the reason why the exception is thrown. It will have |
| /// one of the above 4 values. |
| /// </summary> |
| internal int errorCode; |
| |
| /// <summary> |
| /// Replaces unprintable characters by their escaped (or unicode escaped) |
| /// equivalents in the given string |
| /// </summary> |
| protected static string AddEscapes(string str) |
| { |
| StringBuilder retval = new StringBuilder(); |
| char ch; |
| for (int i = 0; i < str.Length; i++) |
| { |
| switch (str[i]) |
| { |
| |
| case (char)(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[i]) < 0x20 || ch > 0x7e) |
| { |
| string s = "0000" + Convert.ToString(ch, 16); |
| retval.Append("\\u" + s.Substring(s.Length - 4, (s.Length) - (s.Length - 4))); |
| } |
| else |
| { |
| retval.Append(ch); |
| } |
| continue; |
| |
| } |
| } |
| return retval.ToString(); |
| } |
| |
| /// <summary> |
| /// Returns a detailed message for the Error when it is thrown by the |
| /// token manager to indicate a lexical error. |
| /// </summary> |
| /// <remarks>You can customize the lexical error message by modifying this method.</remarks> |
| /// <param name="eofSeen">indicates if EOF caused the lexical error</param> |
| /// <param name="lexState">lexical state in which this error occurred</param> |
| /// <param name="errorLine">line number when the error occurred</param> |
| /// <param name="errorColumn">column number when the error occurred</param> |
| /// <param name="errorAfter">prefix that was seen before this error occurred</param> |
| /// <param name="curChar">the offending character</param> |
| /// <returns>Detailed error message</returns> |
| protected internal static string LexicalError(bool eofSeen, int lexState, int errorLine, int errorColumn, string errorAfter, char curChar) |
| { |
| return ("Lexical error at line " + |
| errorLine + ", column " + |
| errorColumn + ". Encountered: " + |
| (eofSeen ? "<EOF> " : ("\"" + AddEscapes(Convert.ToString(curChar)) + "\"") + " (" + (int)curChar + "), ") + |
| "after : \"" + AddEscapes(errorAfter) + "\""); |
| } |
| |
| /// <summary> |
| /// You can also modify the body of this method to customize your error messages. |
| /// For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not |
| /// of end-users concern, so you can return something like : |
| /// |
| /// "Internal Error : Please file a bug report .... " |
| /// |
| /// from this method for such cases in the release version of your parser. |
| /// </summary> |
| public override string Message => base.Message; |
| |
| /* |
| * Constructors of various flavors follow. |
| */ |
| |
| /// <summary>No arg constructor. </summary> |
| public TokenMgrError() |
| { |
| } |
| |
| /// <summary>Constructor with message and reason. </summary> |
| public TokenMgrError(string message, int reason) |
| : base(message) |
| { |
| errorCode = reason; |
| } |
| |
| /// <summary>Full Constructor. </summary> |
| public TokenMgrError(bool eofSeen, int lexState, int errorLine, int errorColumn, string errorAfter, char curChar, int reason) |
| : this(LexicalError(eofSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason) |
| { |
| } |
| |
| #if FEATURE_SERIALIZABLE_EXCEPTIONS |
| /// <summary> |
| /// Initializes a new instance of this class with serialized data. |
| /// </summary> |
| /// <param name="info">The <see cref="SerializationInfo"/> that holds the serialized object data about the exception being thrown.</param> |
| /// <param name="context">The <see cref="StreamingContext"/> that contains contextual information about the source or destination.</param> |
| protected TokenMgrError(SerializationInfo info, StreamingContext context) |
| : base(info, context) |
| { |
| errorCode = info.GetInt32("errorCode"); |
| } |
| |
| [SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)] |
| public override void GetObjectData(SerializationInfo info, StreamingContext context) |
| { |
| base.GetObjectData(info, context); |
| info.AddValue("errorCode", errorCode, typeof(int)); |
| } |
| #endif |
| } |
| } |