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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Common / AuthoringOM / Serializer / CodeTypeReferenceSerializer.cs / 1305376 / CodeTypeReferenceSerializer.cs
using System; using System.CodeDom; using System.Text; using System.Workflow.ComponentModel.Compiler; using System.Globalization; namespace System.Workflow.ComponentModel.Serialization { ////// This class serializes and deserializes CodeTypeReference objects used by rules. /// It saves the AssemblyQualifiedName, so that the type can be loaded if the assembly is not /// previously loaded at run-time. /// internal sealed class CodeTypeReferenceSerializer : WorkflowMarkupSerializer { // this must match the name used by rules (RuleUserDataKeys.QualifiedName) internal const string QualifiedName = "QualifiedName"; protected internal override bool CanSerializeToString(WorkflowMarkupSerializationManager serializationManager, object value) { return (value is CodeTypeReference); } protected internal override string SerializeToString(WorkflowMarkupSerializationManager serializationManager, object value) { if (serializationManager == null) throw new ArgumentNullException("serializationManager"); if (value == null) throw new ArgumentNullException("value"); CodeTypeReference reference = value as CodeTypeReference; if (reference == null) return string.Empty; // make the typename as best we can, and try to get the fully qualified name // if a type is used in an assembly not referenced, GetType will complain string typeName = ConvertTypeReferenceToString(reference); Type type = serializationManager.GetType(typeName); if (type == null) { // TypeProvider can't find it, see if it's a common type in mscorlib type = Type.GetType(typeName, false); if (type == null) { // still no luck finding it, so simply save the name without assembly information // this is equivalent to what happened before return typeName; } } // // If we get a real type make sure that we get the correct fully qualified name for the target framework version string assemblyFullName = null; TypeProvider typeProvider = serializationManager.GetService(typeof(ITypeProvider)) as TypeProvider; if (typeProvider != null) { assemblyFullName = typeProvider.GetAssemblyName(type); } // // If we didn't find an assembly value it is either a local type or something is wrong // However per the general guidance on multi-targeting it is up to the caller // to make sure that writers (such as Xoml) are given types that exist in the target framework // This makes it the job of the rules designer or rules validator to not call the Xoml stack // with types that do not exist in the target framework if (string.IsNullOrEmpty(assemblyFullName)) { typeName = type.AssemblyQualifiedName; } else { typeName = string.Format(CultureInfo.InvariantCulture, "{0}, {1}", type.FullName, assemblyFullName); } return typeName; } protected internal override object DeserializeFromString(WorkflowMarkupSerializationManager serializationManager, Type propertyType, string value) { if (!propertyType.IsAssignableFrom(typeof(CodeTypeReference))) return null; // if the string is empty or markup extension, // then the object is null if (string.IsNullOrEmpty(value) || IsValidCompactAttributeFormat(value)) return null; // value is the fully qualified name of the type // however, it may refer to non-existant assemblies, so we may get an error CodeTypeReference result; try { Type type = serializationManager.GetType(value); if (type != null) { result = new CodeTypeReference(type); result.UserData[QualifiedName] = type.AssemblyQualifiedName; return result; } } catch (Exception) { // something went wrong getting the type, so simply pass in the string and // let CodeTypeReference figure it out. Note that CodeTypeReference has a method // RipOffAssemblyInformationFromTypeName, so assembly names are ignored. } result = new CodeTypeReference(value); result.UserData[QualifiedName] = value; return result; } private static string ConvertTypeReferenceToString(CodeTypeReference reference) { // CodeTypeReferences are nested structures that represent a type. // This code converts one into a string that GetType() should like. StringBuilder result; if (reference.ArrayElementType != null) { // type represents an array result = new StringBuilder(ConvertTypeReferenceToString(reference.ArrayElementType)); if (reference.ArrayRank > 0) { result.Append("["); result.Append(',', reference.ArrayRank - 1); result.Append("]"); } } else { // type is not an array, but may have type arguments result = new StringBuilder(reference.BaseType); if ((reference.TypeArguments != null) && (reference.TypeArguments.Count > 0)) { string prefix = "["; foreach (CodeTypeReference nested in reference.TypeArguments) { result.Append(prefix); result.Append(ConvertTypeReferenceToString(nested)); prefix = ", "; } result.Append("]"); } } return result.ToString(); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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