org.egothor.merger
Class ConcatListReader

java.lang.Object
  org.egothor.merger.ConcatLists
      org.egothor.merger.ConcatListReader

All Implemented Interfaces:

IListItem, IListReader

public class ConcatListReader
extends ConcatLists

A ConcatIListReader is a collection (array) of IListReaders. Essentially, this is an array of inverted lists. This class can be implemented as sub-class of ConcatEnums, but we have not got the IListReaders to Enumerations, so it must wait.

Author:

Leo Galambos

Constructor Summary

ConcatListReader(int max_len, java.lang.String term)
Constructor for the ConcatListReader object

Method Summary

void	add(long off, IListReader ilr) Add the given inverted list at the given position in this ConcatListReader.
void	close() Close the IListReaders and mark for garbage collection.
IListItem	cursor()
long	getPostings() Return the number of postings.
void	switchContext() Description of the Method

Methods inherited from class org.egothor.merger.ConcatLists

getTerm, next, openProx, setTerm, skipTo, uid, weight

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ConcatListReader

public ConcatListReader(int max_len,
                        java.lang.String term)

Constructor for the ConcatListReader object

Parameters:

max_len - the initial length

term - the term

Method Detail

getPostings

public long getPostings()

Return the number of postings.

Specified by:

getPostings in interface IListReader

Overrides:

getPostings in class ConcatLists

Returns:

the number of postings

add

public void add(long off,
                IListReader ilr)

Add the given inverted list at the given position in this ConcatListReader.

Parameters:

off - where to add

ilr - the inverted list to add

switchContext

public void switchContext()

Description of the Method

Specified by:

switchContext in class ConcatLists

cursor

public IListItem cursor()

close

public void close()

Close the IListReaders and mark for garbage collection.

Specified by:

close in interface IListReader

Overrides:

close in class ConcatLists