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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Linq.Expressions;
using System.ComponentModel;
using Signum.Entities.Properties;
namespace Signum.Entities
{
[Serializable]
public class ImmutableEntity: IdentifiableEntity
{
[Ignore]
bool allowTemporaly = false;
public bool AllowChange
{
get { return allowTemporaly || IsNew; }
set { allowTemporaly = value; Notify(()=>AllowChange); }
}
protected override bool Set<T>(ref T variable, T value, Expression<Func<T>> property)
{
if (AllowChange)
return base.Set(ref variable, value, property);
else
return base.SetIfNew(ref variable, value, property);
}
protected internal override void PreSaving(ref bool graphModified)
{
if (AllowChange)
base.PreSaving(ref graphModified);
else
if (SelfModified)
throw new InvalidOperationException("Attempt to save a not new modified ImmutableEntity");
}
}
}
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I'm Computer Scientist, one of the founders of Signum Software, and the lead developer behind Signum Framework.
www.signumframework.com
I love programming in C#, Linq, Compilers, Algorithms, Functional Programming, Computer Graphics, Maths...