/// <summary>
/// If key provided matches that of this Composite, give JoinCollector
/// iterator over values it may emit.
/// </summary>
/// <exception cref="System.IO.IOException"/>
public virtual void Accept(CompositeRecordReader.JoinCollector jc, K key)
{
// No values from static EMPTY class
if (HasNext() && 0 == cmp.Compare(key, Key()))
{
FillJoinCollector(CreateKey());
jc.Add(id, GetDelegate());
return;
}
jc.Add(id, Empty);
}
/// <summary>
/// Add an iterator to the collector at the position occupied by this
/// RecordReader over the values in this stream paired with the key
/// provided (ie register a stream of values from this source matching K
/// with a collector).
/// </summary>
/// <exception cref="System.IO.IOException"/>
public virtual void Accept(CompositeRecordReader.JoinCollector i, K key)
{
// JoinCollector comes from parent, which has
// no static type for the slot this sits in
vjoin.Clear();
if (0 == cmp.Compare(key, khead))
{
do
{
vjoin.Add(vhead);
}while (Next() && 0 == cmp.Compare(key, khead));
}
i.Add(id, vjoin);
}
/// <summary>
/// Create a RecordReader with <tt>capacity</tt> children to position
/// <tt>id</tt> in the parent reader.
/// </summary>
/// <remarks>
/// Create a RecordReader with <tt>capacity</tt> children to position
/// <tt>id</tt> in the parent reader.
/// The id of a root CompositeRecordReader is -1 by convention, but relying
/// on this is not recommended.
/// </remarks>
/// <exception cref="System.IO.IOException"/>
public CompositeRecordReader(int id, int capacity, Type cmpcl)
{
// Generic array assignment
System.Diagnostics.Debug.Assert(capacity > 0, "Invalid capacity");
this.id = id;
if (null != cmpcl)
{
cmp = ReflectionUtils.NewInstance(cmpcl, null);
q = new PriorityQueue <ComposableRecordReader <K, object> >(3, new _IComparer_78(this
));
}
jc = new CompositeRecordReader.JoinCollector(this, capacity);
kids = new ComposableRecordReader[capacity];
}
public abstract void Accept(CompositeRecordReader.JoinCollector arg1, K arg2);
