public INCMBFieldOperation MergeWithPrevious(INCMBFieldOperation previous)
{
if (previous == null)
{
return(this);
}
if ((previous is NCMBDeleteOperation))
{
return(new NCMBSetOperation(this.amount));
}
if ((previous is NCMBSetOperation))
{
object value = ((NCMBSetOperation)previous).getValue();
if (value is string || value == null)
{
throw new InvalidOperationException("You cannot increment a non-number.");
}
return(new NCMBSetOperation(NCMBObject._addNumbers(value, this.amount)));
}
if ((previous is NCMBIncrementOperation))
{
object oldAmount = (((NCMBIncrementOperation)previous).amount);
return(new NCMBIncrementOperation(NCMBObject._addNumbers(oldAmount, this.amount)));
}
throw new InvalidOperationException("Operation is invalid after previous operation.");
}
public object Apply(object oldValue, NCMBObject obj, string key)
{
if (oldValue == null)
{
return(this.amount);
}
if (oldValue is string || oldValue == null)
{
throw new InvalidOperationException("You cannot increment a non-number.");
}
return(NCMBObject._addNumbers(oldValue, this.amount));
}