protected override void CompileInternal()
{
if (ResultMapFunction != null)
{
return;
}
var destVariable = GetDestionationVariable();
ProcessCustomMembers();
ProcessCustomFunctionMembers();
ProcessFlattenedMembers();
ProcessAutoProperties();
CreateQueryableProjection();
var expressions = new List <Expression> {
destVariable
};
if (BeforeMapHandler != null)
{
Expression <Action <T, TN> > beforeExpression = (src, dest) => BeforeMapHandler(src, dest);
var beforeInvokeExpr = Expression.Invoke(beforeExpression, SourceParameter, destVariable.Left);
expressions.Add(beforeInvokeExpr);
}
expressions.AddRange(PropertyCache.Values);
var customProps = CustomPropertyCache.Where(k => !IgnoreMemberList.Contains(k.Key)).Select(k => k.Value);
expressions.AddRange(customProps);
if (AfterMapHandler != null)
{
Expression <Action <T, TN> > afterExpression = (src, dest) => AfterMapHandler(src, dest);
var afterInvokeExpr = Expression.Invoke(afterExpression, SourceParameter, destVariable.Left);
expressions.Add(afterInvokeExpr);
}
ResultExpressionList.AddRange(expressions);
expressions.Add(destVariable.Left);
var variables = new List <ParameterExpression>();
var finalExpression = Expression.Block(variables, expressions);
var destExpression = destVariable.Left as ParameterExpression;
var substituteParameterVisitor =
new PreciseSubstituteParameterVisitor(
new KeyValuePair <ParameterExpression, ParameterExpression>(SourceParameter, SourceParameter),
new KeyValuePair <ParameterExpression, ParameterExpression>(destExpression, destExpression));
var resultExpression = substituteParameterVisitor.Visit(finalExpression) as BlockExpression;
var expression = Expression.Lambda <Func <T, TN, TN> >(resultExpression, SourceParameter, DestFakeParameter);
ResultMapFunction = expression.Compile();
}
protected override void CompileInternal()
{
if (this.ResultMapFunction != null)
{
return;
}
this.ProcessCustomMembers();
this.ProcessCustomFunctionMembers();
this.ProcessFlattenedMembers();
this.ProcessAutoProperties();
var expressions = new List <Expression>();
if (this.BeforeMapHandler != null)
{
Expression <Action <T, TN> > beforeExpression = (src, dest) => this.BeforeMapHandler(src, dest);
var beforeInvokeExpr = Expression.Invoke(beforeExpression, this.SourceParameter, this.DestFakeParameter);
expressions.Add(beforeInvokeExpr);
}
expressions.AddRange(this.PropertyCache.Values);
var customProps = this.CustomPropertyCache.Where(k => !this.IgnoreMemberList.Contains(k.Key)).Select(k => k.Value);
expressions.AddRange(customProps);
if (this.AfterMapHandler != null)
{
Expression <Action <T, TN> > afterExpression = (src, dest) => this.AfterMapHandler(src, dest);
var afterInvokeExpr = Expression.Invoke(afterExpression, this.SourceParameter, this.DestFakeParameter);
expressions.Add(afterInvokeExpr);
}
this.ResultExpressionList.AddRange(expressions);
this.ResultExpressionList.Insert(0, this.GetDestionationVariable());
expressions.Add(this.DestFakeParameter);
var finalExpression = Expression.Block(expressions);
var substituteParameterVisitor =
new PreciseSubstituteParameterVisitor(
new KeyValuePair <ParameterExpression, ParameterExpression>(this.SourceParameter, this.SourceParameter),
new KeyValuePair <ParameterExpression, ParameterExpression>(this.DestFakeParameter, this.DestFakeParameter));
//var substituteParameterVisitor = new SubstituteParameterVisitor(SourceParameter, DestFakeParameter);
var resultExpression = substituteParameterVisitor.Visit(finalExpression);
var expression = Expression.Lambda <Func <T, TN, TN> >(resultExpression, this.SourceParameter, this.DestFakeParameter);
this.ResultMapFunction = expression.Compile();
}
public Expression GetMemberMappingExpression(Expression left, Expression right)
{
var nullCheckNestedMemberVisitor = new NullCheckNestedMemberVisitor(false);
nullCheckNestedMemberVisitor.Visit(right);
var destNullableType = Nullable.GetUnderlyingType(left.Type);
var sourceNullableType = Nullable.GetUnderlyingType(right.Type);
var destType = destNullableType ?? left.Type;
var sourceType = sourceNullableType ?? right.Type;
if (ComplexMapCondition(sourceType, destType))
{
var customMapExpression = GetCustomMapExpression(right.Type, left.Type);
if (customMapExpression != null)
{
var srcExp = Expression.Variable(right.Type,
string.Format("{0}Src", Guid.NewGuid().ToString("N")));
var assignSrcExp = Expression.Assign(srcExp, right);
var destExp = Expression.Variable(left.Type,
string.Format("{0}Dst", Guid.NewGuid().ToString("N")));
var assignDestExp = Expression.Assign(destExp, left);
// try precise substitute visitor
var substituteParameterVisitor =
new PreciseSubstituteParameterVisitor(
new KeyValuePair <ParameterExpression, ParameterExpression>(
Expression.Variable(right.Type, "srcTyped"), srcExp),
new KeyValuePair <ParameterExpression, ParameterExpression>(
Expression.Variable(left.Type, "dstTyped"), destExp));
var blockExpression = substituteParameterVisitor.Visit(customMapExpression) as BlockExpression;
var assignResultExp = Expression.Assign(left, destExp);
var resultBlockExp = Expression.Block(new[] { srcExp, destExp }, assignSrcExp, assignDestExp, blockExpression, assignResultExp);
var checkNullExp =
Expression.IfThenElse(Expression.Equal(right, Expression.Default(right.Type)),
Expression.Assign(left, Expression.Default(left.Type)), resultBlockExp);
var releaseExp = Expression.Block(new ParameterExpression[] { }, checkNullExp);
return(releaseExp);
}
var returnTypeDifferenceVisitor = new ReturnTypeDifferenceVisitor(right);
returnTypeDifferenceVisitor.Visit(right);
// If right is custom member expression / func and return type matches left type
// just assign
if (left.Type == right.Type && returnTypeDifferenceVisitor.DifferentReturnTypes)
{
return(Expression.Assign(left, right));
}
if (typeof(IConvertible).IsAssignableFrom(destType) &&
typeof(IConvertible).IsAssignableFrom(sourceType))
{
var assignExp = CreateConvertibleAssignExpression(left,
right,
left.Type,
sourceType,
destNullableType);
return(assignExp);
}
var mapComplexResult = GetDifferentTypeMemberMappingExpression(right, left);
return(nullCheckNestedMemberVisitor.CheckNullExpression != null
? Expression.Condition(nullCheckNestedMemberVisitor.CheckNullExpression,
Expression.Assign(left, Expression.Default(left.Type)),
mapComplexResult)
: mapComplexResult);
}
var binaryExpression = CreateAssignExpression(left,
right,
left.Type,
destNullableType,
sourceNullableType);
var conditionalExpression = nullCheckNestedMemberVisitor.CheckNullExpression != null?Expression.Condition(nullCheckNestedMemberVisitor.CheckNullExpression, Expression.Assign(left, Expression.Default(left.Type)), binaryExpression) : (Expression)binaryExpression;
return(conditionalExpression);
}
protected override void CompileInternal()
{
if (this.ResultMapFunction != null)
{
return;
}
BinaryExpression destVariable = this.GetDestionationVariable();
this.ProcessCustomMembers();
this.ProcessCustomFunctionMembers();
this.ProcessFlattenedMembers();
this.ProcessAutoProperties();
this.CreateQueryableProjection();
List <Expression> expressions = new List <Expression> {
destVariable
};
if (this.BeforeMapHandler != null)
{
Expression <Action <T, TN> > beforeExpression = (src, dest) => this.BeforeMapHandler(src, dest);
InvocationExpression beforeInvokeExpr = Expression.Invoke(beforeExpression, this.SourceParameter, destVariable.Left);
expressions.Add(beforeInvokeExpr);
}
expressions.AddRange(this.PropertyCache.Values);
IEnumerable <Expression> customProps = this.CustomPropertyCache.Where(k => !this.IgnoreMemberList.Contains(k.Key))
.Select(k => k.Value);
expressions.AddRange(customProps);
if (this.AfterMapHandler != null)
{
Expression <Action <T, TN> > afterExpression = (src, dest) => this.AfterMapHandler(src, dest);
InvocationExpression afterInvokeExpr = Expression.Invoke(afterExpression, this.SourceParameter, destVariable.Left);
expressions.Add(afterInvokeExpr);
}
this.ResultExpressionList.AddRange(expressions);
expressions.Add(destVariable.Left);
List <ParameterExpression> variables = new List <ParameterExpression>();
BlockExpression finalExpression = Expression.Block(variables, expressions);
ParameterExpression destExpression = destVariable.Left as ParameterExpression;
PreciseSubstituteParameterVisitor substituteParameterVisitor = new PreciseSubstituteParameterVisitor(
new KeyValuePair <ParameterExpression, ParameterExpression>(this.SourceParameter, this.SourceParameter),
new KeyValuePair <ParameterExpression, ParameterExpression>(destExpression, destExpression));
BlockExpression resultExpression = substituteParameterVisitor.Visit(finalExpression) as BlockExpression;
Expression <Func <T, TN, TN> > expression = Expression.Lambda <Func <T, TN, TN> >(
resultExpression,
this.SourceParameter,
this.DestFakeParameter);
this.ResultMapFunction = expression.Compile();
}