112 lines
4.1 KiB
C#
112 lines
4.1 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="XPathCompileException.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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// <owner current="true" primary="true">[....]</owner>
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//------------------------------------------------------------------------------
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using System.Runtime.Serialization;
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using System.Security.Permissions;
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using System.Text;
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namespace System.Xml.Xsl.XPath {
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[Serializable]
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internal class XPathCompileException : XslLoadException {
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public string queryString;
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public int startChar;
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public int endChar;
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protected XPathCompileException(SerializationInfo info, StreamingContext context)
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: base(info, context)
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{
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queryString = (string)info.GetValue("QueryString", typeof(string));
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startChar = (int) info.GetValue("StartChar" , typeof(int ));
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endChar = (int) info.GetValue("EndChar" , typeof(int ));
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}
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[SecurityPermissionAttribute(SecurityAction.LinkDemand, SerializationFormatter = true)]
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public override void GetObjectData(SerializationInfo info, StreamingContext context) {
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base.GetObjectData(info, context);
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info.AddValue("QueryString", queryString);
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info.AddValue("StartChar" , startChar);
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info.AddValue("EndChar" , endChar);
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}
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internal XPathCompileException(string queryString, int startChar, int endChar, string resId, params string[] args)
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: base(resId, args)
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{
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this.queryString = queryString;
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this.startChar = startChar;
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this.endChar = endChar;
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}
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internal XPathCompileException(string resId, params string[] args)
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: base(resId, args) {} // queryString will be set later
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private enum TrimType {
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Left,
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Right,
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Middle,
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}
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// This function is used to prevent long quotations in error messages, SQLBUDT 222626
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private static void AppendTrimmed(StringBuilder sb, string value, int startIndex, int count, TrimType trimType) {
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const int TrimSize = 32;
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const string TrimMarker = "...";
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if (count <= TrimSize) {
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sb.Append(value, startIndex, count);
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} else {
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switch (trimType) {
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case TrimType.Left:
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sb.Append(TrimMarker);
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sb.Append(value, startIndex + count - TrimSize, TrimSize);
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break;
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case TrimType.Right:
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sb.Append(value, startIndex, TrimSize);
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sb.Append(TrimMarker);
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break;
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case TrimType.Middle:
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sb.Append(value, startIndex, TrimSize / 2);
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sb.Append(TrimMarker);
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sb.Append(value, startIndex + count - TrimSize / 2, TrimSize / 2);
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break;
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}
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}
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}
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internal string MarkOutError() {
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if (queryString == null || queryString.Trim(' ').Length == 0) {
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return null;
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}
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int len = endChar - startChar;
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StringBuilder sb = new StringBuilder();
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AppendTrimmed(sb, queryString, 0, startChar, TrimType.Left);
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if (len > 0) {
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sb.Append(" -->");
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AppendTrimmed(sb, queryString, startChar, len, TrimType.Middle);
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}
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sb.Append("<-- ");
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AppendTrimmed(sb, queryString, endChar, queryString.Length - endChar, TrimType.Right);
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return sb.ToString();
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}
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internal override string FormatDetailedMessage() {
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string message = Message;
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string error = MarkOutError();
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if (error != null && error.Length > 0) {
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if (message.Length > 0) {
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message += Environment.NewLine;
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}
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message += error;
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}
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return message;
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}
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}
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}
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