/// <summary>
/// Merge data object with this list.
/// Only objects that are not already in the list
/// are added to the list.
/// </summary>
/// <param name='data'>The data to merge.</param>
public void Merge(DataId data)
{
if (data.IsNotNull() && !Exists(data))
{
Add(data);
}
}
/// <summary>
/// Test if two DataId references are equal.
/// </summary>
/// <param name='data1'>Data to compare.</param>
/// <param name='data2'>Data to compare.</param>
/// <returns>True if both references are null or
/// if they have the same type and Id.</returns>
public static Boolean AreEqual(DataId data1, DataId data2)
{
if (data1.IsNull() && data2.IsNull())
{
return(true);
}
if (data1.IsNull() || data2.IsNull())
{
return(false);
}
if (data1.GetType() != data2.GetType())
{
return(false);
}
return(data1.Id == data2.Id);
}
/// <summary>
/// Checks if data is in the list.
/// </summary>
/// <param name='dataId'>Object to be checked.</param>
/// <returns>Boolean value indicating if the data exists in the list or not.</returns>
public Boolean Exists(DataId dataId)
{
Object value;
if (_optimize)
{
value = _idHashTable[dataId.Id];
return((value != null) && (value is DataId));
}
else
{
foreach (DataId dataIdInList in this)
{
if (dataIdInList.Id == dataId.Id)
{
// Data found.
return(true);
}
}
// Data not found.
return(false);
}
}
/// <summary>
/// Test if two DataId references are not equal.
/// </summary>
/// <param name='data1'>Data to compare.</param>
/// <param name='data2'>Data to compare.</param>
/// <returns>False if both references are null or
/// if they have the same type and Id.</returns>
public static Boolean AreNotEqual(DataId data1, DataId data2)
{
return(!AreEqual(data1, data2));
}