public override IObjectState UpdateImpl(IObjectDataMember objectDataMember)
{
var eqExpression = Expression.Equal(objectDataMember.GetValueExpression(_left), objectDataMember.GetValueExpression(_right));
var result = Expression.AndAlso(_expression, eqExpression);
return(new EqualityObjectState(result, _left, _right));
}
public override IObjectState UpdateImpl(IObjectDataMember objectDataMember)
{
var tabExpression = Constant(Tab);
var callExpression = MakeIndentExpression(Call(StringConcat2StringsMethod, tabExpression,
Call(objectDataMember.GetValueExpression(_Target), GetToStringMethodInfo(objectDataMember))));
Expression memberNameExpression = Constant(objectDataMember.MemberName + " :");
var endOfLineExpression = Constant(NewLine);
var typeExpression = objectDataMember.Walker.CanExpand(objectDataMember.MemberType) && Nullable.GetUnderlyingType(objectDataMember.MemberType) == null
? Call(StringConcat2StringsMethod, Constant($"{Tab}<{objectDataMember.MemberType.Name}>"), endOfLineExpression)
: null;
if (typeExpression != null)
{
memberNameExpression = Call(StringConcat2StringsMethod, memberNameExpression, typeExpression);
}
if (Nullable.GetUnderlyingType(objectDataMember.MemberType) != null || !objectDataMember.MemberType.IsValueType)
{
callExpression = Condition(NotEqual(objectDataMember.GetValueExpression(_Target),
Constant(null, objectDataMember.MemberType)), callExpression, Constant($"{Tab}(null){NewLine}"));
}
var lineExpression = Call(StringConcat2StringsMethod, memberNameExpression, callExpression);
var concatLinesExpression = Call(StringConcat2StringsMethod, _Expression, lineExpression);
return(new ToStringObjectState(concatLinesExpression, _Target));
}
public IObjectState Update(IObjectDataMember objectDataMember)
{
if (!CanUpdate(objectDataMember))
{
return(this);
}
return(UpdateImpl(objectDataMember));
}
private bool CanUpdate(IObjectDataMember objectDataMember)
{
var typeEnable = GetEnable(objectDataMember.DeclaringType);
var memberEnable = CheckEnable(objectDataMember.GetCustomAttributes <EnableAttributeBase>());
if (!typeEnable.HasValue && !memberEnable.HasValue)
{
return(true);
}
return(memberEnable.HasValue ? memberEnable : typeEnable);
}
public override IObjectState UpdateImpl(IObjectDataMember objectDataMember)
{
var targetMember = objectDataMember.GetValueExpression(_target);
var leftMember = objectDataMember.GetValueExpression(_left);
var rightMember = objectDataMember.GetValueExpression(_right);
var test = Expression.NotEqual(Expression.Default(objectDataMember.MemberType), leftMember);
var assign = Expression.Assign(targetMember, Expression.Condition(test, leftMember, rightMember));
_expressions.Add(assign);
return(new MergeObjectState(_expressions, _target, _left, _right, _type));
}
public override IObjectState UpdateImpl(IObjectDataMember objectDataMember)
{
Expression callExpression = Expression.Call(objectDataMember.GetValueExpression(_Target), GetHashCodeMethodInfo(objectDataMember));
if (Nullable.GetUnderlyingType(objectDataMember.MemberType) != null || !objectDataMember.MemberType.IsValueType)
{
callExpression = Expression.Condition(Expression.NotEqual(objectDataMember.GetValueExpression(_Target),
Expression.Constant(null, objectDataMember.MemberType)), callExpression, Expression.Constant(0));
}
var multExpression = Expression.Multiply(_Expression, Expression.Constant(23));
var addExpression = Expression.Add(multExpression, callExpression);
return(new GetHashCodeObjectState(addExpression, _Target));
}
private IObjectState ProcessCollection(IObjectState state, IObjectDataMember member)
{
throw new NotSupportedException();
}
private IObjectState ProcessMember(IObjectState state, IObjectDataMember member)
{
return(typeof(Enumerable).IsAssignableFrom(member.MemberType)
? ProcessCollection(state, member)
: _visitor.Visit(state, member));
}
public IObjectState Visit(IObjectState state, IObjectDataMember objectDataMember) => state.Update(objectDataMember);
private MethodInfo GetHashCodeMethodInfo(IObjectDataMember objectDataMember) => typeof(object).GetMethod(nameof(GetHashCode));
public abstract IObjectState UpdateImpl(IObjectDataMember objectDataMember);
private MethodInfo GetToStringMethodInfo(IObjectDataMember objectDataMember) => typeof(object).GetMethods().First(x => x.Name == nameof(ToString) && !x.GetParameters().Any());
