Package org.apache.lucene.facet.taxonomy.writercache

Enum LruTaxonomyWriterCache.LRUType

java.lang.Object

java.lang.Enum<LruTaxonomyWriterCache.LRUType>

org.apache.lucene.facet.taxonomy.writercache.LruTaxonomyWriterCache.LRUType

All Implemented Interfaces:

Serializable, Comparable<LruTaxonomyWriterCache.LRUType>

Enclosing class:

LruTaxonomyWriterCache

public static enum LruTaxonomyWriterCache.LRUType
extends Enum<LruTaxonomyWriterCache.LRUType>

Determines cache type. For guaranteed correctness - not relying on no-collisions in the hash function, LRU_STRING should be used.

Enum Constant Summary

Enum Constants

Enum Constant	Description
LRU_HASHED	Use only the label's 64 bit longHashCode as the hash key.
LRU_STRING	Use the label as the hash key; this is always correct but will usually use more RAM.

Method Summary

Modifier and Type	Method	Description
static LruTaxonomyWriterCache.LRUType	valueOf(String name)	Returns the enum constant of this type with the specified name.
static LruTaxonomyWriterCache.LRUType[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

LRU_HASHED

public static final LruTaxonomyWriterCache.LRUType LRU_HASHED

Use only the label's 64 bit longHashCode as the hash key. Do not check equals, unlike most hash maps. Note that while these hashes are very likely to be unique, the chance of a collision is still greater than zero. If such an unlikely event occurs, your document will get an incorrect facet.

LRU_STRING

public static final LruTaxonomyWriterCache.LRUType LRU_STRING

Use the label as the hash key; this is always correct but will usually use more RAM.

Method Details

values

public static LruTaxonomyWriterCache.LRUType[] values()

Returns an array containing the constants of this enum type, in the order they are declared.

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static LruTaxonomyWriterCache.LRUType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null