Package org.eclipse.rdf4j.sail.lucene

Enum TypeBacktraceMode

java.lang.Object

java.lang.Enum<TypeBacktraceMode>

org.eclipse.rdf4j.sail.lucene.TypeBacktraceMode

All Implemented Interfaces:

Serializable, Comparable<TypeBacktraceMode>

public enum TypeBacktraceMode
extends Enum<TypeBacktraceMode>

Option to describe how the LuceneSail should handle the add of a new type statement in a connection if the LuceneSail.INDEXEDTYPES property is defined.

Backtrace example

For example if we have the predicate my:text indexed by Lucene and (my:oftype my:type1) as an LuceneSail.INDEXEDTYPES, the previous store state is

 # Store triples:
 my:subj1 my:text   "demo 1" .
 my:subj2 my:oftype my:type1 .
 my:subj2 my:text   "demo 2" .
 # Lucene Indexed literals:
 my:subj2 "demo 2"
 

The option will define how the Sail will handle the update:

 INSERT my:subj1 my:oftype my:type1 .
 DELETE my:subj2 my:oftype my:type1 .
 

Enum Constant Summary

Enum Constants

Enum Constant	Description
COMPLETE	The sail will get all previous triples of the subject and add them (if required) in the Lucene index, this mode is enabled by default.
PARTIAL	The sail won't get any previous triples of the subject in the Lucene index, this mode is useful if you won't change the type and values of your subjects in multiple queries.

Field Summary

Fields

Modifier and Type	Field	Description
static final TypeBacktraceMode	DEFAULT_TYPE_BACKTRACE_MODE	Default backtrace mode

Method Summary

Modifier and Type	Method	Description
boolean	shouldBackTraceDelete()
boolean	shouldBackTraceInsert()
static TypeBacktraceMode	valueOf(String name)	Returns the enum constant of this type with the specified name.
static TypeBacktraceMode[]	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

COMPLETE

public static final TypeBacktraceMode COMPLETE

The sail will get all previous triples of the subject and add them (if required) in the Lucene index, this mode is enabled by default.

the future state of the Lucene index in the above example would be:

 my:subj1 "demo 1"
 

PARTIAL

public static final TypeBacktraceMode PARTIAL

The sail won't get any previous triples of the subject in the Lucene index, this mode is useful if you won't change the type and values of your subjects in multiple queries.

the future state of the Lucene index in the above example would be:

 my:subj2 "demo 2"
 

Field Details

DEFAULT_TYPE_BACKTRACE_MODE

public static final TypeBacktraceMode DEFAULT_TYPE_BACKTRACE_MODE

Default backtrace mode

Method Details

values

public static TypeBacktraceMode[] 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 TypeBacktraceMode 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

shouldBackTraceInsert

public boolean shouldBackTraceInsert()

Returns:

if the index should backtrace over the old properties on an add

shouldBackTraceDelete

public boolean shouldBackTraceDelete()

Returns:

if the index should backtrace over the old properties on a delete