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// -----------------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
// -----------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.ComponentModel.Composition.Hosting;
using System.ComponentModel.Composition.Primitives;
using System.IO;
using System.Text;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace System.ComponentModel.Composition.Factories
{
internal static partial class ErrorFactory
{
public static CompositionError Create(ICompositionElement element)
{
return Create(CompositionErrorId.Unknown, (string)null, element, (Exception)null);
}
public static CompositionError Create(Exception exception)
{
return Create(CompositionErrorId.Unknown, (string)null, (ICompositionElement)null, exception);
}
public static CompositionError Create(string message)
{
return Create(CompositionErrorId.Unknown, message, (ICompositionElement)null, (Exception)null);
}
public static CompositionError Create(string message, Exception exception)
{
return Create(CompositionErrorId.Unknown, message, (ICompositionElement)null, exception);
}
public static CompositionError Create(CompositionErrorId errorId)
{
return Create(errorId, errorId.ToString(), (ICompositionElement)null, (Exception)null);
}
public static CompositionError Create(CompositionErrorId errorId, string message, Exception exception)
{
return new CompositionError(errorId, message, (ICompositionElement)null, exception);
}
public static CompositionError Create(CompositionErrorId errorId, string message, ICompositionElement element, Exception exception)
{
return new CompositionError(errorId, message, element, exception);
}
public static IEnumerable<CompositionError> CreateFromDsl(string format)
{
CompositionException exception = (CompositionException)CreateFromDslCore(format);
return exception.Errors;
}
private static Exception CreateFromDslCore(string format)
{
List<Tuple<string, string>> identifiers = new List<Tuple<string,string>>();
StringBuilder token = new StringBuilder();
StringReader reader = new StringReader(format);
while (reader.Peek() != -1)
{
char c = (char)reader.Read();
if (c == '|')
{
AddIdentifier(identifiers, token);
continue;
}
if (c == '(')
{
string dsl = ReadToNextMatchingParenthesis(reader);
AddIdentifier(identifiers, token, dsl);
continue;
}
token.Append(c);
}
AddIdentifier(identifiers, token);
return CreateFromList(identifiers);
}
private static Exception CreateFromList(List<Tuple<string, string>> identifiers)
{
List<CompositionError> errors = new List<CompositionError>();
Exception exception = null;
foreach (var identifier in identifiers)
{
Exception innerException = null;
if (identifier.Item2 != null)
{
innerException = CreateFromDslCore(identifier.Item2);
}
if (identifier.Item1 == "Exception")
{
Assert.IsNull(exception);
exception = new Exception(identifier.Item1, innerException);
}
else
{
Assert.AreEqual("Error", identifier.Item1);
errors.Add(Create(identifier.Item1, innerException));
}
}
if (errors.Count == 0)
{
return exception;
}
return new CompositionException("", exception, errors);
}
private static void AddIdentifier(List<Tuple<string, string>> identifiers, StringBuilder identifier)
{
AddIdentifier(identifiers, identifier, (string)null);
}
private static void AddIdentifier(List<Tuple<string, string>> identifiers, StringBuilder identifier, string dsl)
{
if (identifier.Length == 0)
return;
identifiers.Add(new Tuple<string, string>(identifier.ToString(), dsl));
identifier.Length = 0;
}
private static IEnumerable<CompositionError> CreateFromList(List<string> errors)
{
foreach (string value in errors)
{
yield return Create(value);
}
}
private static string ReadToNextMatchingParenthesis(StringReader reader)
{
Stack<char> parenthesis = new Stack<char>();
parenthesis.Push('(');
StringBuilder builder = new StringBuilder();
while (reader.Peek() != -1)
{
char c = (char)reader.Read();
if (c == '(')
{
parenthesis.Push(c);
if (parenthesis.Count == 1)
{
continue;
}
}
if (c == ')')
{
char pop = parenthesis.Pop();
Assert.AreEqual('(', pop);
if (parenthesis.Count == 0)
{
break;
}
}
builder.Append(c);
}
return builder.ToString();
}
}
}
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