org.apache.lucene.document

Class Field.Index

java.lang.Object

org.apache.lucene.util.Parameter

org.apache.lucene.document.Field.Index

All Implemented Interfaces:

java.io.Serializable

Enclosing class:

Field

public static final class Field.Index
extends Parameter
implements java.io.Serializable

Specifies whether and how a field should be indexed.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static Field.Index	ANALYZED Index the tokens produced by running the field's value through an Analyzer.
static Field.Index	ANALYZED_NO_NORMS Expert: Index the tokens produced by running the field's value through an Analyzer, and also separately disable the storing of norms.
static Field.Index	NO Do not index the field value.
static Field.Index	NO_NORMS Deprecated. This has been renamed to NOT_ANALYZED_NO_NORMS
static Field.Index	NOT_ANALYZED Index the field's value without using an Analyzer, so it can be searched.
static Field.Index	NOT_ANALYZED_NO_NORMS Expert: Index the field's value without an Analyzer, and also disable the storing of norms.
static Field.Index	TOKENIZED Deprecated. this has been renamed to ANALYZED
static Field.Index	UN_TOKENIZED Deprecated. This has been renamed to NOT_ANALYZED

Method Summary

Methods inherited from class org.apache.lucene.util.Parameter

readResolve, toString

Methods inherited from class java.lang.Object

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

Field Detail

NO

public static final Field.Index NO

Do not index the field value. This field can thus not be searched, but one can still access its contents provided it is stored.

ANALYZED

public static final Field.Index ANALYZED

Index the tokens produced by running the field's value through an Analyzer. This is useful for common text.

TOKENIZED

public static final Field.Index TOKENIZED

Deprecated. this has been renamed to ANALYZED

NOT_ANALYZED

public static final Field.Index NOT_ANALYZED

Index the field's value without using an Analyzer, so it can be searched. As no analyzer is used the value will be stored as a single term. This is useful for unique Ids like product numbers.

UN_TOKENIZED

public static final Field.Index UN_TOKENIZED

Deprecated. This has been renamed to NOT_ANALYZED

NOT_ANALYZED_NO_NORMS

public static final Field.Index NOT_ANALYZED_NO_NORMS

Expert: Index the field's value without an Analyzer, and also disable the storing of norms. Note that you can also separately enable/disable norms by calling AbstractField.setOmitNorms(boolean). No norms means that index-time field and document boosting and field length normalization are disabled. The benefit is less memory usage as norms take up one byte of RAM per indexed field for every document in the index, during searching. Note that once you index a given field with norms enabled, disabling norms will have no effect. In other words, for this to have the above described effect on a field, all instances of that field must be indexed with NOT_ANALYZED_NO_NORMS from the beginning.

NO_NORMS

public static final Field.Index NO_NORMS

Deprecated. This has been renamed to NOT_ANALYZED_NO_NORMS

ANALYZED_NO_NORMS

public static final Field.Index ANALYZED_NO_NORMS

Expert: Index the tokens produced by running the field's value through an Analyzer, and also separately disable the storing of norms. See NOT_ANALYZED_NO_NORMS for what norms are and why you may want to disable them.