org.apache.lucene.facet.util
Class MultiCategoryListIterator

java.lang.Object
  org.apache.lucene.facet.util.MultiCategoryListIterator

All Implemented Interfaces:

CategoryListIterator

public class MultiCategoryListIterator
extends Object
implements CategoryListIterator

Iterates over multiple CategoryListIterators, consuming the provided iterators in order.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Constructor Summary

MultiCategoryListIterator(CategoryListIterator... iterators)
Receives the iterators to iterate on

Method Summary

boolean	init() Fails if all given iterators fail to init
long	nextCategory() Return a value larger than Integer.MAX_VALUE only if all iterators are exhausted
boolean	skipTo(int docId) Fails only if skipTo on all the provided iterators returned false

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiCategoryListIterator

public MultiCategoryListIterator(CategoryListIterator... iterators)

Receives the iterators to iterate on

Method Detail

init

public boolean init()
             throws IOException

Fails if all given iterators fail to init

Specified by:

init in interface CategoryListIterator

Throws:

IOException

nextCategory

public long nextCategory()
                  throws IOException

Return a value larger than Integer.MAX_VALUE only if all iterators are exhausted

Specified by:

nextCategory in interface CategoryListIterator

Throws:

IOException

skipTo

public boolean skipTo(int docId)
               throws IOException

Fails only if skipTo on all the provided iterators returned false

Specified by:

skipTo in interface CategoryListIterator

Throws:

IOException