public Expression <Func <T, int> > CreateGetHashCode()
{
var obj = Expression.Parameter(Type);
var body = EqualityComparerHelper.CreateGetHashCodeBody(obj, MembersOrder);
var lambda = Expression.Lambda <Func <T, int> >(body, obj);
return(lambda);
}
public Expression <Func <T, T, bool> > CreateEquals()
{
var x = Expression.Parameter(Type);
var y = Expression.Parameter(Type);
List <Expression> list = new List <Expression>();
var exitPoint = Expression.Label(typeof(bool));
var body = EqualityComparerHelper.CreateEqualsBody(x, y, CompareOptions, MembersOrder);
var lambda = Expression.Lambda <Func <T, T, bool> >(body, x, y);
return(lambda);
}
public Expression <Func <IData, int> > CreateGetHashCodeMethod()
{
var obj = Expression.Parameter(typeof(IData));
var objValue = Expression.Variable(Type);
var dataType = typeof(Data <>).MakeGenericType(Type);
var body = Expression.Block(typeof(int), new ParameterExpression[] { objValue },
Expression.Assign(objValue, Expression.Convert(obj, dataType).Value()),
EqualityComparerHelper.CreateGetHashCodeBody(objValue, MembersOrder)
);
var lambda = Expression.Lambda <Func <IData, int> >(body, obj);
return(lambda);
}
public Expression <Func <IData, IData, bool> > CreateEqualsMethod()
{
var x = Expression.Parameter(typeof(IData));
var y = Expression.Parameter(typeof(IData));
var xValue = Expression.Variable(Type);
var yValue = Expression.Variable(Type);
var dataType = typeof(Data <>).MakeGenericType(Type);
var body = Expression.Block(typeof(bool), new ParameterExpression[] { xValue, yValue },
Expression.Assign(xValue, Expression.Convert(x, dataType).Value()),
Expression.Assign(yValue, Expression.Convert(y, dataType).Value()),
EqualityComparerHelper.CreateEqualsBody(xValue, yValue, CompareOptions, MembersOrder)
);
var lambda = Expression.Lambda <Func <IData, IData, bool> >(body, x, y);
return(lambda);
}
public static Expression CreateEqualsBody(Expression x, Expression y, CompareOption[] compareOptions, Func <Type, MemberInfo, int> membersOrder)
{
var type = x.Type;
var exitPoint = Expression.Label(typeof(bool));
if (DataType.IsPrimitiveType(type) || type == typeof(Guid))
{
return(EqualityComparerHelper.GetEqualsCommand(x, y, compareOptions[0], exitPoint, true));
}
else
{
List <Expression> list = new List <Expression>();
int i = 0;
int count = DataTypeUtils.GetPublicMembers(type, membersOrder).Count();
foreach (var member in DataTypeUtils.GetPublicMembers(type, membersOrder))
{
list.Add(GetEqualsCommand(Expression.PropertyOrField(x, member.Name), Expression.PropertyOrField(y, member.Name), compareOptions[i++], exitPoint, i == count));
}
return(Expression.Block(typeof(bool), list));
}
}
