Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / EntityModel / SchemaObjectModel / Utils.cs / 1305376 / Utils.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Globalization; using System.Text.RegularExpressions; using System.Xml; using System.Data; using System.Data.Metadata.Edm; using System.Diagnostics; using System.Text; using System.Data.Entity; namespace System.Data.EntityModel.SchemaObjectModel { ////// Summary description for Utils. /// // make class internal when friend assemblies are available internal static class Utils { #region Static Fields // this is what we should be doing for CDM schemas // the RegEx for valid identifiers are taken from the C# Language Specification (2.4.2 Identifiers) // (except that we exclude _ as a valid starting character). // This results in a somewhat smaller set of identifier from what System.CodeDom.Compiler.CodeGenerator.IsValidLanguageIndependentIdentifier // allows. Not all identifiers allowed by IsValidLanguageIndependentIdentifier are valid in C#.IsValidLanguageIndependentIdentifier allows: // Mn, Mc, and Pc as a leading character (which the spec and C# (at least for some Mn and Mc characters) do not allow) // characters that Char.GetUnicodeCategory says are in Nl and Cf but which the RegEx does not accept (and which C# does allow). // // we could create the StartCharacterExp and OtherCharacterExp dynamically to force inclusion of the missing Nl and Cf characters... private const string StartCharacterExp = @"[\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Lm}\p{Nl}]"; private const string OtherCharacterExp = @"[\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Lm}\p{Nl}\p{Mn}\p{Mc}\p{Nd}\p{Pc}\p{Cf}]"; private const string NameExp = StartCharacterExp+OtherCharacterExp+"{0,}"; //private static Regex ValidDottedName=new Regex(@"^"+NameExp+@"(\."+NameExp+@"){0,}$",RegexOptions.Singleline); private static Regex UndottedNameValidator = new Regex(@"^"+NameExp+@"$",RegexOptions.Singleline | RegexOptions.Compiled ); #endregion #region Static Methods internal static void ExtractNamespaceAndName(SchemaDataModelOption dataModel, string qualifiedTypeName, out string namespaceName, out string name) { Debug.Assert(!string.IsNullOrEmpty(qualifiedTypeName), "qualifiedTypeName parameter is null"); GetBeforeAndAfterLastPeriod(qualifiedTypeName, out namespaceName, out name); } internal static string ExtractTypeName(SchemaDataModelOption dataModel, string qualifiedTypeName) { Debug.Assert(!string.IsNullOrEmpty(qualifiedTypeName), "qualifiedTypeName parameter is null or empty"); return GetEverythingAfterLastPeriod(qualifiedTypeName); } private static void GetBeforeAndAfterLastPeriod(string qualifiedTypeName, out string before, out string after) { int lastDot = qualifiedTypeName.LastIndexOf('.'); if (lastDot < 0) { before = null; after = qualifiedTypeName; } else { before = qualifiedTypeName.Substring(0, lastDot); after = qualifiedTypeName.Substring(lastDot + 1); } } internal static string GetEverythingBeforeLastPeriod(string qualifiedTypeName) { int lastDot = qualifiedTypeName.LastIndexOf('.'); if (lastDot < 0) return null; return qualifiedTypeName.Substring(0, lastDot); } private static string GetEverythingAfterLastPeriod(string qualifiedTypeName) { int lastDot = qualifiedTypeName.LastIndexOf('.'); if (lastDot < 0) return qualifiedTypeName; return qualifiedTypeName.Substring(lastDot + 1); } ////// /// /// /// /// ///public static bool GetString(Schema schema, XmlReader reader, out string value) { Debug.Assert(schema != null, "schema parameter is null"); Debug.Assert(reader != null, "reader parameter is null"); if (reader.SchemaInfo.Validity == System.Xml.Schema.XmlSchemaValidity.Invalid) { // an error has already been issued by the xsd validation value = null; return false; } value = reader.Value; if ( string.IsNullOrEmpty(value) ) { schema.AddError( ErrorCode.InvalidName, EdmSchemaErrorSeverity.Error, reader, System.Data.Entity.Strings.InvalidName(value, reader.Name)); return false; } return true; } /// /// /// /// /// /// ///public static bool GetDottedName(Schema schema, XmlReader reader,out string name) { if (!GetString(schema, reader, out name)) { return false; } return ValidateDottedName(schema, reader, name); } internal static bool ValidateDottedName(Schema schema, XmlReader reader, string name) { Debug.Assert(schema != null, "schema parameter is null"); Debug.Assert(reader != null, "reader parameter is null"); Debug.Assert(!string.IsNullOrEmpty(name), "name parameter is null or empty"); Debug.Assert(reader.SchemaInfo.Validity != System.Xml.Schema.XmlSchemaValidity.Invalid, "This method should not be called when the schema is invalid"); if (schema.DataModel == SchemaDataModelOption.EntityDataModel) { // each part of the dotted name needs to be a valid name foreach (string namePart in name.Split('.')) { if (!ValidUndottedName(namePart)) { schema.AddError(ErrorCode.InvalidName, EdmSchemaErrorSeverity.Error, reader, System.Data.Entity.Strings.InvalidName(name, reader.Name)); return false; } } } return true; } /// /// /// /// /// /// ///public static bool GetUndottedName(Schema schema,XmlReader reader,out string name) { Debug.Assert(schema != null, "schema parameter is null"); Debug.Assert(reader != null, "reader parameter is null"); if (reader.SchemaInfo.Validity == System.Xml.Schema.XmlSchemaValidity.Invalid) { // the xsd already put in an error name = null; return false; } name = reader.Value; if (string.IsNullOrEmpty(name)) { schema.AddError( ErrorCode.InvalidName, EdmSchemaErrorSeverity.Error, reader, System.Data.Entity.Strings.EmptyName(reader.Name)); return false; } if (schema.DataModel == SchemaDataModelOption.EntityDataModel && !ValidUndottedName(name) ) { schema.AddError( ErrorCode.InvalidName, EdmSchemaErrorSeverity.Error, reader, System.Data.Entity.Strings.InvalidName(name,reader.Name)); return false; } Debug.Assert(!(schema.DataModel == SchemaDataModelOption.EntityDataModel && name.IndexOf('.') >= 0), string.Format(CultureInfo.CurrentCulture, "{1} ({0}) is not valid. {1} cannot be qualified.", name, reader.Name)); return true; } /// /// /// /// ///internal static bool ValidUndottedName(string name) { // CodeGenerator.IsValidLanguageIndependentIdentifier does demand a FullTrust Link // but this is safe since the function only walks over the string no risk is introduced return !string.IsNullOrEmpty(name) && UndottedNameValidator.IsMatch(name) && IsValidLanguageIndependentIdentifier(name); } [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2122:DoNotIndirectlyExposeMethodsWithLinkDemands")] [System.Security.SecuritySafeCritical] private static bool IsValidLanguageIndependentIdentifier(string name) { return System.CodeDom.Compiler.CodeGenerator.IsValidLanguageIndependentIdentifier(name); } /// /// /// /// /// /// ///public static bool GetBool(Schema schema, XmlReader reader, out bool value) { Debug.Assert(schema != null, "schema parameter is null"); Debug.Assert(reader != null, "reader parameter is null"); if ( reader.SchemaInfo.Validity == System.Xml.Schema.XmlSchemaValidity.Invalid ) { value = true; // we have to set the value to something before returning. return false; } // do this in a try catch, just in case the attribute wasn't validated against an xsd:boolean try { value = reader.ReadContentAsBoolean(); return true; } catch (System.Xml.XmlException) { // expected: Content cannot be converted to the type Boolean. Line xyz, position abc. } Debug.Fail(string.Format(CultureInfo.CurrentCulture, "{1} value ({0}) is not valid: Expected 'true' or 'false'.", reader.Value, reader.Name)); value = true; // we have to set the value to something before returning. return false; } public static bool GetInt(Schema schema,XmlReader reader,out int value) { Debug.Assert(schema != null, "schema parameter is null"); Debug.Assert(reader != null, "reader parameter is null"); if (reader.SchemaInfo.Validity == System.Xml.Schema.XmlSchemaValidity.Invalid) { // an error has already been issued by the xsd validation value = 0; ; return false; } string text = reader.Value; value = int.MinValue; if ( int.TryParse(text,NumberStyles.Integer,System.Globalization.CultureInfo.InvariantCulture,out value) ) return true; schema.AddError( ErrorCode.IntegerExpected, EdmSchemaErrorSeverity.Error, reader, System.Data.Entity.Strings.ValueNotUnderstood(reader.Value,reader.Name)); return false; } public static bool GetByte(Schema schema,XmlReader reader,out byte value) { Debug.Assert(schema != null, "schema parameter is null"); Debug.Assert(reader != null, "reader parameter is null"); if (reader.SchemaInfo.Validity == System.Xml.Schema.XmlSchemaValidity.Invalid) { // an error has already been issued by the xsd validation value = 0; ; return false; } string text = reader.Value; value = byte.MinValue; if (byte.TryParse(text, NumberStyles.Integer, System.Globalization.CultureInfo.InvariantCulture, out value)) { return true; } schema.AddError( ErrorCode.ByteValueExpected, EdmSchemaErrorSeverity.Error, reader, System.Data.Entity.Strings.ValueNotUnderstood(reader.Value, reader.Name)); return false; } /// /// /// /// /// ///public static int CompareNames(string lhsName, string rhsName) { return string.Compare(lhsName,rhsName,StringComparison.Ordinal); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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