Package org.apache.lucene.facet.taxonomy.directory

Class DirectoryTaxonomyWriter.DiskOrdinalMap

java.lang.Object

org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyWriter.DiskOrdinalMap

All Implemented Interfaces:

DirectoryTaxonomyWriter.OrdinalMap

Enclosing class:

DirectoryTaxonomyWriter

public static final class DirectoryTaxonomyWriter.DiskOrdinalMap
extends Object
implements DirectoryTaxonomyWriter.OrdinalMap

DirectoryTaxonomyWriter.OrdinalMap maintained on file system

Constructor Summary

Constructors

Constructor	Description
DiskOrdinalMap(File tmpfile)	Sole constructor.

Method Summary

Modifier and Type	Method	Description
void	addDone()	Call addDone() to say that all addMapping() have been done.
void	addMapping(int origOrdinal, int newOrdinal)	Record a mapping.
int[]	getMap()	Return the map from the taxonomy's original (consecutive) ordinals to the new taxonomy's ordinals.
void	setSize(int taxonomySize)	Set the size of the map.

Methods inherited from class java.lang.Object

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

Constructor Detail

DiskOrdinalMap

public DiskOrdinalMap(File tmpfile)
               throws FileNotFoundException

Sole constructor.

Throws:

FileNotFoundException

Method Detail

addMapping

public void addMapping(int origOrdinal,
                       int newOrdinal)
                throws IOException

Description copied from interface: DirectoryTaxonomyWriter.OrdinalMap

Record a mapping.

Specified by:

addMapping in interface DirectoryTaxonomyWriter.OrdinalMap

Throws:

IOException

setSize

public void setSize(int taxonomySize)
             throws IOException

Description copied from interface: DirectoryTaxonomyWriter.OrdinalMap

Set the size of the map. This MUST be called before addMapping(). It is assumed (but not verified) that addMapping() will then be called exactly 'size' times, with different origOrdinals between 0 and size-1.

Specified by:

setSize in interface DirectoryTaxonomyWriter.OrdinalMap

Throws:

IOException

addDone

public void addDone()
             throws IOException

Description copied from interface: DirectoryTaxonomyWriter.OrdinalMap

Call addDone() to say that all addMapping() have been done. In some implementations this might free some resources.

Specified by:

addDone in interface DirectoryTaxonomyWriter.OrdinalMap

Throws:

IOException

getMap

public int[] getMap()
             throws IOException

Description copied from interface: DirectoryTaxonomyWriter.OrdinalMap

Return the map from the taxonomy's original (consecutive) ordinals to the new taxonomy's ordinals. If the map has to be read from disk and ordered appropriately, it is done when getMap() is called. getMap() should only be called once, and only when the map is actually needed. Calling it will also free all resources that the map might be holding (such as temporary disk space), other than the returned int[].

Specified by:

getMap in interface DirectoryTaxonomyWriter.OrdinalMap

Throws:

IOException