private object CreateExpressionInternal(Expression expression, IEnumerable <ParameterExpression> parameters, IDictionary <string, object> parameterMappings, Type returnType)
{
var modelFuncVisitor = new ModelFuncExpressionVisitor();
var modelFunc = modelFuncVisitor.Visit(expression);
var visitor = new TreeExtensionExpressionVisitor();
visitor.Visit(modelFunc);
var collectedParameterInfos = visitor.CollectParameterInfos();
var parameterList = visitor.ListParameters();
var types = new Type[parameterList.Count + 1];
var args = new object[3 * parameterList.Count + 1];
if (parameterMappings == null && modelFuncVisitor.ExtractParameters.Count > 0)
{
parameterMappings = new Dictionary <string, object>();
}
foreach (var ex in modelFuncVisitor.ExtractParameters)
{
parameterMappings.Add(ex.Parameter.Name, ModelNotifySystem.Instance.CreateExpression(ex.Value, parameters, parameterMappings));
}
var expressionLambda = Expression.Lambda(modelFunc, parameterList);
var expressionCompiled = expressionLambda.Compile();
args[0] = expressionCompiled;
for (int i = 0; i < parameterList.Count; i++)
{
var parameter = parameterList[i];
types[i] = parameter.Type;
args[3 * i + 1] = CreateNotifyValue(parameter.Name, parameterMappings, parameter.Type);
TreeExtensionExpressionVisitor.ParameterInfo parInfo;
if (collectedParameterInfos.TryGetValue(parameter, out parInfo))
{
args[3 * i + 3] = parInfo.Properties;
args[3 * i + 2] = parInfo.Anchors;
}
else
{
args[3 * i + 3] = null;
args[3 * i + 2] = null;
}
}
types[parameterList.Count] = returnType;
var treeExtensionCallType = ObservableTreeExtensionCallTypes.Types[types.Length - 2].MakeGenericType(types);
var constructor = treeExtensionCallType.GetConstructors()[0];
#if DEBUG
if (constructor == null)
{
System.Diagnostics.Debugger.Break();
}
#endif
return(constructor.Invoke(args));
}
private object CreateExpressionInternal(Expression expression, IEnumerable <ParameterExpression> parameters, IDictionary <string, object> parameterMappings, Type returnType)
{
var modelFuncVisitor = new ModelFuncExpressionVisitor();
var modelFunc = modelFuncVisitor.Visit(expression);
var promotionVisitor = new PromotionExpressionVisitor();
var promotionExpression = promotionVisitor.Visit(modelFunc);
var collectedParameterInfos = promotionVisitor.CollectParameterInfos();
var parametersNew = promotionVisitor.ListParameters();
var newExpression = Expression.Lambda(promotionExpression, parametersNew);
var newExpressionCompiled = newExpression.Compile();
var types = new Type[parametersNew.Count + 1];
var args = new object[3 * parametersNew.Count + 1];
args[0] = newExpressionCompiled;
if (parameterMappings == null && modelFuncVisitor.ExtractParameters.Count > 0)
{
parameterMappings = new Dictionary <string, object>();
}
foreach (var ex in modelFuncVisitor.ExtractParameters)
{
parameterMappings.Add(ex.Parameter.Name, ModelNotifySystem.Instance.CreateExpression(ex.Value, parameters, parameterMappings));
}
for (int i = 0; i < parametersNew.Count; i++)
{
var parameter = parametersNew[i];
var extraction = promotionVisitor.ExtractParameters.FirstOrDefault(ex => ex.Parameter == parameter);
if (extraction.Parameter == null)
{
// The parameter is an original parameter
args[3 * i + 1] = CreateNotifyValue(parameter.Name, parameterMappings, parameter.Type);
types[i] = parameter.Type;
}
else
{
var val = extraction.Value;
if (!typeof(IModelElement).IsAssignableFrom(val.Type) && !typeof(IEnumerableExpression).IsAssignableFrom(val.Type) && !typeof(INotifyEnumerable).IsAssignableFrom(val.Type))
{
throw new NotSupportedException("Currently, only extraction of parameters typed as model elements or notifiable collections is supported.");
}
args[3 * i + 1] = ModelNotifySystem.Instance.CreateExpression(val, parameters, parameterMappings);
types[i] = val.Type;
}
PromotionExpressionVisitor.ParameterInfo parInfo;
if (collectedParameterInfos.TryGetValue(parameter, out parInfo))
{
args[3 * i + 2] = parInfo.Properties;
args[3 * i + 3] = parInfo.NeedsContainment;
}
else
{
args[3 * i + 2] = null;
args[3 * i + 3] = false;
}
}
types[types.Length - 1] = returnType;
var promotionMethodCallType = promotionMethodCallTypes[types.Length - 2].MakeGenericType(types);
var constructor = promotionMethodCallType.GetConstructors()[0];
#if DEBUG
if (constructor == null)
{
System.Diagnostics.Debugger.Break();
}
#endif
return(constructor.Invoke(args));
}
