// Constructors
/// <summary>
/// Initializes a new instance of this type.
/// </summary>
/// <param name="origin">Initial <see cref="Origin"/> property value.</param>
public DifferentialTuple(Tuple origin)
{
ArgumentValidator.EnsureArgumentNotNull(origin, "origin");
this.origin = origin;
difference = null;
backupedDifference = null;
}
internal void BackupDifference()
{
if (difference != null)
{
backupedDifference = (DifferentialTuple)this.Clone();
}
}
/// <summary>
/// Initializes a new instance of this type.
/// </summary>
/// <param name="origin">Initial <see cref="Origin"/> property value.</param>
/// <param name="difference">Initial <see cref="Difference"/> property value.</param>
/// <exception cref="ArgumentException">Tuple descriptors mismatch.</exception>
public DifferentialTuple(Tuple origin, Tuple difference)
{
ArgumentValidator.EnsureArgumentNotNull(origin, "origin");
if (difference != null && origin.Descriptor != difference.Descriptor)
{
throw new ArgumentException(
string.Format(Strings.ExInvalidTupleDescriptorExpectedDescriptorIs, origin.Descriptor),
"difference");
}
this.origin = origin;
this.difference = difference;
backupedDifference = null;
}
internal void RestoreDifference()
{
if (backupedDifference != null)
{
origin.MergeWith(backupedDifference.Origin, MergeBehavior.PreferDifference);
if (difference == null)
{
difference = backupedDifference.Difference.Clone();
}
else
{
difference.MergeWith(backupedDifference, 0, MergeBehavior.PreferDifference);
}
backupedDifference = null;
}
}
private DifferentialTuple(Tuple origin, Tuple difference, DifferentialTuple backupedDifference)
: this(origin, difference)
{
this.backupedDifference = backupedDifference;
}
internal void DropBackedUpDifference()
{
backupedDifference = null;
}
