protected override Expression BuildAfterExpression(ExpressionBuilderArgs args, ParameterExpression innerResultVar)
{
var expressions = new List <Expression>();
expressions.Add(base.BuildAfterExpression(args, innerResultVar));
if (_convertValue != null)
{
expressions.Add(Expression.Assign(innerResultVar, Invoke(_convertValue, args, innerResultVar)));
}
if (_assertValue != null)
{
expressions.Add(Expression.IfThen(
Expression.Not(Invoke(_assertValue, args, innerResultVar)),
Expression.Throw(Expression.New(
typeof(BinaryReadingAssertException).GetConstructor(new[] { typeof(Object), typeof(Object), typeof(String) }),
Expression.TypeAs(args.InstanceVar, typeof(Object)),
Expression.TypeAs(innerResultVar, typeof(Object)),
Expression.Constant(MemberName)))));
}
if (_positionAfter != null)
{
expressions.Add(Expression.Assign(AdvancedExpression.Position(args.BrParameter), Invoke(_positionAfter, args, innerResultVar)));
}
return(Expression.Block(expressions));
}
private Expression <ReadDelegate <T> > GetLambdaExpression <T>()
{
var brParameter = Expression.Parameter(typeof(BitsReader), "br");
Dictionary <Type, Expression <ReadFunc> > typeReaders = Types.ToDictionary(pair => pair.Key, pair =>
{
var args = new ExpressionBuilderArgs();
args.BrParameter = brParameter;
args.InstanceVar = Expression.Parameter(typeof(Object));
args.TypeReaders = Expression.Parameter(typeof(Dictionary <Type, Expression <ReadFunc> >));
args.Endianness = Expression.Constant(_endianness);
var expression = pair.Value.BuildExpression(args);
return(Expression.Lambda <ReadFunc>(expression, string.Format("Read_{0}", pair.Key.Name),
new[] { args.BrParameter, args.InstanceVar, args.TypeReaders }));
});
var resultVar = Expression.Variable(typeof(T), "root");
var brCheckExpression = Expression.IfThen(Expression.Equal(brParameter, Expression.Constant(null)),
Expression.Throw(Expression.New(typeof(ArgumentNullException).GetConstructor(new[] { typeof(String) }), Expression.Constant(brParameter.Name, typeof(String)))));
var ctorExpression = Expression.Assign(resultVar, Expression.New(typeof(T)));
var typeReadersVar = Expression.Variable(typeof(Dictionary <Type, Expression <ReadFunc> >));
var typeReadExpression = Expression.Block(new[] { resultVar, typeReadersVar },
brCheckExpression,
CreateTypeReaders(typeReadersVar, typeReaders),
ctorExpression,
Expression.Invoke(AdvancedExpression.GetTypeBuilder(typeReadersVar, Expression.Constant(typeof(T))),
brParameter, resultVar, typeReadersVar),
resultVar);
return(Expression.Lambda <ReadDelegate <T> >(typeReadExpression, string.Format("Read_Root", typeof(T).Name), new[] { brParameter }));
}
protected override Expression BuildBodyExpression(ExpressionBuilderArgs args, ParameterExpression innerResultVar, ParameterExpression typeVar)
{
if (_size == null)
{
throw new InvalidMappingException("Size of skipped member must be set.");
}
return(Expression.AddAssign(AdvancedExpression.Position(args.BrParameter), Expression.Convert(Invoke(_size, args), typeof(BinaryOffset))));
}
protected override Expression BuildCtorExpression(ExpressionBuilderArgs args)
{
if (_factory != null)
{
return(Expression.Convert(Expression.Invoke(_factory, AdvancedExpression.Context <T>(args.BrParameter, args.InstanceVar)), MemberType));
}
else
{
return(Expression.New(MemberType));
}
}
protected override Expression BuildBeforeExpression(ExpressionBuilderArgs args)
{
var expressions = new List <Expression>();
if (_position != null)
{
expressions.Add(Expression.Assign(AdvancedExpression.Position(args.BrParameter), Invoke(_position, args)));
}
expressions.Add(base.BuildBeforeExpression(args));
return(Expression.Block(expressions));
}
protected override Expression BuildCtorExpression(ExpressionBuilderArgs args)
{
var elementType = MemberType.GetElementType();
var lengthVar = Expression.Variable(typeof(UInt64), "length");
var ctorExp = Expression.NewArrayBounds(
elementType,
lengthVar);
return(Expression.Block(new [] { lengthVar },
Expression.Assign(lengthVar, Invoke(_length, args)),
AdvancedExpression.Debug(string.Format("Array {0} initialized. ({{0}} elements).", MemberName), lengthVar),
ctorExp));
}
protected override Expression BuildBodyExpression(ExpressionBuilderArgs args, ParameterExpression innerResultVar, ParameterExpression typeVar)
{
var elementType = typeof(TElement);
//IExpressionBuilder typeBuilder = FileFormatBuilder.Types[elementType];
var iVar = Expression.Variable(typeof(int), "i");
var elementVar = Expression.Variable(elementType, "iterator");
var loopEndLabel = Expression.Label();
var elementBuilder = MemberBuilder <TMember, TElement> .Create("[i]");
if (_elementBuilderConfiguration != null)
{
_elementBuilderConfiguration(elementBuilder);
}
var innerArgs = args.Clone();
innerArgs.InstanceVar = innerResultVar;
return(Expression.Block(
new[] { iVar, elementVar },
Expression.Assign(iVar, Expression.Constant(0)),
AdvancedExpression.Debug("Reading collection {0}...", Expression.Constant(MemberName)),
Expression.Loop(
Expression.IfThenElse(
GetLoopCondition(args, innerResultVar, iVar, elementVar),
Expression.Block(
AdvancedExpression.Debug("Reading {0}[{1}]...", Expression.Constant(MemberName), iVar),
Expression.Assign(elementVar, elementBuilder.BuildExpression(innerArgs)),
/*
* Expression.Assign(elementVar, elementCtor),
* typeBuilder.BuildExpression(brParameter, elementVar, typeReaders),
*/
InsertElement(args, innerResultVar, iVar, elementVar),
Expression.PostIncrementAssign(iVar)),
Expression.Break(loopEndLabel)),
loopEndLabel)));
}
protected Expression Invoke <TResult>(Expression <Func <IMemberContext <T, TMember>, TResult> > expression, ExpressionBuilderArgs args, ParameterExpression innerResultVar)
{
return(Expression.Invoke(expression, AdvancedExpression.MemberContext <T, TMember>(args.BrParameter, args.InstanceVar, innerResultVar)));
}
protected override Expression BuildBodyExpression(ExpressionBuilderArgs args, ParameterExpression innerResultVar, ParameterExpression typeVar)
{
return(Expression.Block(AdvancedExpression.Debug("Type: {0}", typeVar),
Expression.Invoke(AdvancedExpression.GetTypeBuilder(args.TypeReaders, typeVar),
args.BrParameter, innerResultVar, args.TypeReaders)));
}
