/// <summary>
/// Deletes all the records satisfying a condition
/// </summary>
/// <param name="Filter"></param>
public void DeleteAll(IRecordSeeker Filter)
{
int[] idx = this.Seek(Filter);
foreach (int i in idx)
{
this.Delete(i);
}
}
/// <summary>
/// Finds all records satisfying a condition
/// </summary>
/// <param name="Filter"></param>
/// <returns></returns>
public IEnumerable <Record> SelectAll(IRecordSeeker Filter)
{
int[] idx = this.Seek(Filter);
List <Record> elements = new List <Record>();
foreach (int i in idx)
{
elements.Add(this.Select(i));
}
return(elements);
}
/// <summary>
/// Finds all records in the page satisfying a condition
/// </summary>
/// <param name="Filter"></param>
/// <returns></returns>
public virtual int[] Seek(IRecordSeeker Filter)
{
List <int> idx = new List <int>();
for (int i = 0; i < this.Count; i++)
{
if (Filter.Equals(this._Elements[i]))
{
idx.Add(i);
}
}
return(idx.ToArray());
}
/// <summary>
/// Finds the last record in the page satisfying a condition
/// </summary>
/// <param name="Filter"></param>
/// <returns></returns>
public virtual int SeekLast(IRecordSeeker Filter)
{
int idx = this.Count - 1;
while (idx >= 0)
{
if (Filter.Equals(this._Elements[idx]))
{
return(idx);
}
idx--;
}
return(Page.NULL_INDEX);
}
/// <summary>
/// Finds the first record in the page satisfying a condition
/// </summary>
/// <param name="Filter"></param>
/// <returns></returns>
public virtual int SeekFirst(IRecordSeeker Filter)
{
int idx = 0;
while (idx < this.Count)
{
if (Filter.Equals(this._Elements[idx]))
{
return(idx);
}
idx++;
}
return(Page.NULL_INDEX);
}
/// <summary>
/// Deletes the last record satisfying a condition
/// </summary>
/// <param name="Filter"></param>
public void DeleteLast(IRecordSeeker Filter)
{
this.Delete(this.SeekLast(Filter));
}
/// <summary>
/// Finds the last record satisfying a condition
/// </summary>
/// <param name="Filter"></param>
/// <returns></returns>
public Record SelectLast(IRecordSeeker Filter)
{
return(this.Select(this.SeekLast(Filter)));
}
