org.galagosearch.core.retrieval.structured
Class NullExtentIterator

java.lang.Object
  org.galagosearch.core.retrieval.structured.CountIterator
      org.galagosearch.core.retrieval.structured.ExtentIterator
          org.galagosearch.core.retrieval.structured.NullExtentIterator

All Implemented Interfaces:

java.lang.Comparable<CountIterator>, StructuredIterator

public class NullExtentIterator
extends ExtentIterator

Author:

trevor

Constructor Summary

NullExtentIterator()

Method Summary

int	count() Returns the number of occurrences of this iterator's term in the current document.
int	document() Returns the current document.
ExtentArray	extents()
boolean	isDone() Returns true if there is no data left in the list and false otherwise.
void	nextDocument() Moves the iterator to the next document in the list.
void	reset() Resets the position of this iterator to the start of the list.

Methods inherited from class org.galagosearch.core.retrieval.structured.ExtentIterator

skipToDocument

Methods inherited from class org.galagosearch.core.retrieval.structured.CountIterator

compareTo

Methods inherited from class java.lang.Object

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

Constructor Detail

NullExtentIterator

public NullExtentIterator()

Method Detail

nextDocument

public void nextDocument()

Description copied from class: CountIterator

Moves the iterator to the next document in the list. If no such document is available, isDone() will return true after this method is called.

Specified by:

nextDocument in class ExtentIterator

isDone

public boolean isDone()

Description copied from class: CountIterator

Returns true if there is no data left in the list and false otherwise. If the result of this method is true, the data returned from document() and count() is meaningless.

Specified by:

isDone in class ExtentIterator

extents

public ExtentArray extents()

Specified by:

extents in class ExtentIterator

document

public int document()

Description copied from class: CountIterator

Returns the current document.

Specified by:

document in class ExtentIterator

count

public int count()

Description copied from class: CountIterator

Returns the number of occurrences of this iterator's term in the current document.

Specified by:

count in class ExtentIterator

reset

public void reset()

Description copied from class: CountIterator

Resets the position of this iterator to the start of the list.

Specified by:

reset in interface StructuredIterator

Specified by:

reset in class ExtentIterator