EntitySqlException.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / EntitySqlException.cs / 1305376 / EntitySqlException.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

namespace System.Data 
{
    using System;
    using System.IO;
    using System.Data.Common.EntitySql; 
    using System.Globalization;
    using System.Runtime.Serialization; 
    using System.Security.Permissions; 
    using System.Diagnostics;
    using System.Text; 

    /// 
    /// Represents an eSQL Query compilation exception;
    /// The class of exceptional conditions that may cause this exception to be raised are mainly: 
    /// 1) Syntax Errors: raised during query text parsing and when a given query does not conform to eSQL formal grammar;
    /// 2) Semantic Errors: raised when semantic rules of eSQL language are not met such as metadata or schema information 
    ///    not accurate or not present, type validation errors, scoping rule violations, user of undefined variables, etc. 
    /// For more information, see eSQL Language Spec.
    ///  
    [Serializable]
    public sealed class EntitySqlException : EntityException
    {
        #region Private Fields 
        /// 
        /// represents the full error message containing the error description, the error context if available, line 
        /// and column number if available. 
        /// 
        private string _message; 

        /// 
        /// error message description.
        ///  
        private string _errorDescription;
 
        ///  
        /// information about the context where the error occurred
        ///  
        private string _errorContext;

        /// 
        /// error line number 
        /// 
        private int _line; 
 
        /// 
        /// error column number 
        /// 
        private int _column;
        #endregion
 
        #region Public Constructors
        ///  
        /// Initializes a new instance of  with the generic error message. 
        /// 
        public EntitySqlException() 
            : this(System.Data.Entity.Strings.GeneralQueryError)
        {
            HResult = HResults.InvalidQuery;
        } 

        ///  
        /// Initializes a new instance of  with the given message. 
        /// 
        public EntitySqlException(string message) 
        {
            _message = message;

            HResult = HResults.InvalidQuery; 
        }
 
        ///  
        /// Initializes a new instance of  with the given message and innerException instance.
        ///  
        public EntitySqlException(string message, Exception innerException)
            : base(message, innerException)
        {
            _message = message; 

            HResult = HResults.InvalidQuery; 
        } 

        ///  
        /// Initializes a new instance  with the given serializationInfo and streamingContext.
        /// 
        /// 
        ///  
        private EntitySqlException(SerializationInfo serializationInfo, StreamingContext streamingContext)
            : base(serializationInfo, streamingContext) 
        { 
            HResult = HResults.InvalidQuery;
        } 
        #endregion

        #region Internal Constructors
        ///  
        /// Initializes a new instance EntityException with an ErrorContext instance and a given error message.
        ///  
        internal static EntitySqlException Create(ErrorContext errCtx, string errorMessage, Exception innerException) 
        {
            return EntitySqlException.Create(errCtx.CommandText, errorMessage, errCtx.InputPosition, errCtx.ErrorContextInfo, errCtx.UseContextInfoAsResourceIdentifier, innerException); 
        }

        /// 
        /// Initializes a new instance EntityException with contextual information to allow detailed error feedback. 
        /// 
        internal static EntitySqlException Create(string commandText, 
                                                  string errorDescription, 
                                                  int errorPosition,
                                                  string errorContextInfo, 
                                                  bool loadErrorContextInfoFromResource,
                                                  Exception innerException)
        {
            int line; 
            int column;
            string errorContext = FormatErrorContext(commandText, errorPosition, errorContextInfo, loadErrorContextInfoFromResource, out line, out column); 
 
            string errorMessage = FormatQueryError(errorDescription, errorContext);
 
            return new EntitySqlException(errorMessage, errorDescription, errorContext, line, column, innerException);
        }

        ///  
        /// core constructor
        ///  
        private EntitySqlException(string message, string errorDescription, string errorContext, int line, int column, Exception innerException) 
            : base(message, innerException)
        { 
            _message = message;
            _errorDescription = errorDescription;
            _errorContext = errorContext;
            _line = line; 
            _column = column;
 
            HResult = HResults.InvalidQuery; 
        }
 
        #endregion

        #region Public Properties
        ///  
        /// Gets the full error message containing the error description, the error context if available, line
        /// and column numbers if available 
        ///  
        public override string Message
        { 
            get
            {
                return _message ?? String.Empty;
            } 
        }
 
        ///  
        /// Gets the error description explaining the reason why the query was not accepted or an empty String.Empty
        ///  
        public string ErrorDescription
        {
            get
            { 
                return _errorDescription ?? String.Empty;
            } 
        } 

        ///  
        /// Gets the aproximate context where the error occurred if available.
        /// 
        public string ErrorContext
        { 
            get
            { 
                return _errorContext ?? String.Empty; 
            }
        } 

        /// 
        /// Returns the the aproximate line number where the error occurred
        ///  
        public int Line
        { 
            get { return _line; } 
        }
 
        /// 
        /// Returns the the aproximate column number where the error occurred
        /// 
        public int Column 
        {
            get { return _column; } 
        } 
        #endregion
 
        #region Helpers
        internal static string GetGenericErrorMessage(string commandText, int position)
        {
            int lineNumber = 0; 
            int colNumber = 0;
            return FormatErrorContext(commandText, position, EntityRes.GenericSyntaxError, true, out lineNumber, out colNumber); 
        } 

        ///  
        /// Returns error context in the format [[errorContextInfo, ]line ddd, column ddd].
        /// Returns empty string if errorPosition is less than 0 and errorContextInfo is not specified.
        /// 
        internal static string FormatErrorContext( 
            string commandText,
            int errorPosition, 
            string errorContextInfo, 
            bool loadErrorContextInfoFromResource,
            out int lineNumber, 
            out int columnNumber)
        {
            Debug.Assert(errorPosition > -1, "position in input stream cannot be < 0");
            Debug.Assert(errorPosition <= commandText.Length, "position in input stream cannot be greater than query text size"); 

            if (loadErrorContextInfoFromResource) 
            { 
                errorContextInfo = !String.IsNullOrEmpty(errorContextInfo) ? EntityRes.GetString(errorContextInfo) : String.Empty;
            } 

            //
            // Replace control chars and newLines for single representation characters
            // 
            StringBuilder sb = new StringBuilder(commandText.Length);
            for (int i = 0; i < commandText.Length; i++) 
            { 
                Char c = commandText[i];
                if (CqlLexer.IsNewLine(c)) 
                {
                    c = '\n';
                }
                else if ((Char.IsControl(c) || Char.IsWhiteSpace(c)) && ('\r' != c)) 
                {
                    c = ' '; 
                } 
                sb.Append(c);
            } 
            commandText = sb.ToString().TrimEnd(new char[] { '\n' });

            //
            // Compute line and column 
            //
            string[] queryLines = commandText.Split(new char[] { '\n' }, StringSplitOptions.None); 
            for (lineNumber = 0, columnNumber = errorPosition; 
                 lineNumber < queryLines.Length && columnNumber > queryLines[lineNumber].Length;
                 columnNumber -= (queryLines[lineNumber].Length + 1), ++lineNumber) ; 

            ++lineNumber; // switch lineNum and colNum to 1-based indexes
            ++columnNumber;
 
            //
            // Error context format: "[errorContextInfo,] line ddd, column ddd" 
            // 
            sb = new Text.StringBuilder();
            if (!String.IsNullOrEmpty(errorContextInfo)) 
            {
                sb.AppendFormat(CultureInfo.CurrentCulture, "{0}, ", errorContextInfo);
            }
 
            if (errorPosition >= 0)
            { 
                sb.AppendFormat(CultureInfo.CurrentCulture, 
                                "{0} {1}, {2} {3}",
                                System.Data.Entity.Strings.LocalizedLine, 
                                lineNumber,
                                System.Data.Entity.Strings.LocalizedColumn,
                                columnNumber);
            } 

            return sb.ToString(); 
        } 

        ///  
        /// Returns error message in the format: "error such and such[, near errorContext]."
        /// 
        private static string FormatQueryError(string errorMessage, string errorContext)
        { 
            //
            // Message format: error such and such[, near errorContextInfo]. 
            // 
            StringBuilder sb = new StringBuilder();
            sb.Append(errorMessage); 
            if (!String.IsNullOrEmpty(errorContext))
            {
                sb.AppendFormat(CultureInfo.CurrentCulture, " {0} {1}", System.Data.Entity.Strings.LocalizedNear, errorContext);
            } 

            return sb.Append(".").ToString(); 
        } 
        #endregion
 
        #region ISerializable implementation
        /// 
        /// sets the System.Runtime.Serialization.SerializationInfo
        /// with information about the exception. 
        /// 
        /// The System.Runtime.Serialization.SerializationInfo that holds the serialized 
        /// object data about the exception being thrown. 
        /// 
        ///  
        [SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter = true)]
        public override void GetObjectData(SerializationInfo info, StreamingContext context)
        {
            base.GetObjectData(info, context); 
            info.AddValue("Message", _message);
            info.AddValue("ErrorDescription", _errorDescription); 
            info.AddValue("ErrorContext", _errorContext); 
            info.AddValue("Line", _line);
            info.AddValue("Column", _column); 
        }
        #endregion
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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