org.apache.solr.request

Class TermIndex

java.lang.Object

org.apache.solr.request.TermIndex

class TermIndex
extends java.lang.Object

Class to save memory by only storing every nth term (for random access), while numbering the terms, allowing them to be retrieved later by number. This is only valid when used with the IndexReader it was created with. The IndexReader is not actually stored to facilitate caching by using it as a key in a weak hash map.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) org.apache.lucene.index.Term	fterm
(package private) java.lang.String[]	index
(package private) static int	interval
(package private) static int	intervalBits
(package private) static int	intervalMask
(package private) int	nTerms
(package private) java.lang.String	prefix
(package private) long	sizeOfStrings

Constructor Summary

Constructors

Constructor and Description
TermIndex(java.lang.String field)
TermIndex(java.lang.String field, java.lang.String prefix)

Method Summary

Modifier and Type	Method and Description
(package private) org.apache.lucene.index.Term	createTerm(java.lang.String termVal)
(package private) NumberedTermEnum	getEnumerator(org.apache.lucene.index.IndexReader reader)
(package private) NumberedTermEnum	getEnumerator(org.apache.lucene.index.IndexReader reader, int termNumber)
long	memSize() Returns the approximate amount of memory taken by this TermIndex.

Methods inherited from class java.lang.Object

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

Field Detail

intervalBits

static final int intervalBits

See Also:

Constant Field Values

intervalMask

static final int intervalMask

See Also:

Constant Field Values

interval

static final int interval

See Also:

Constant Field Values

fterm

final org.apache.lucene.index.Term fterm

prefix

final java.lang.String prefix

index

java.lang.String[] index

nTerms

int nTerms

sizeOfStrings

long sizeOfStrings

Constructor Detail

TermIndex

TermIndex(java.lang.String field)

TermIndex

TermIndex(java.lang.String field,
          java.lang.String prefix)

Method Detail

createTerm

org.apache.lucene.index.Term createTerm(java.lang.String termVal)

getEnumerator

NumberedTermEnum getEnumerator(org.apache.lucene.index.IndexReader reader,
                               int termNumber)
                        throws java.io.IOException

Throws:

java.io.IOException

getEnumerator

NumberedTermEnum getEnumerator(org.apache.lucene.index.IndexReader reader)
                        throws java.io.IOException

Throws:

java.io.IOException

memSize

public long memSize()

Returns the approximate amount of memory taken by this TermIndex. This is only an approximation and doesn't take into account java object overhead.

Returns:

the approximate memory consumption in bytes