Package org.eclipse.rdf4j.rio.binary

Class BinaryRDFWriterSettings

java.lang.Object

org.eclipse.rdf4j.rio.binary.BinaryRDFWriterSettings

public class BinaryRDFWriterSettings
extends Object

WriterSettings for the binary RDF writer.

Since:

4.3.0

Author:

Frens Jan Rumph

Field Summary

Fields

Modifier and Type	Field	Description
static final RioSetting<Long>	BUFFER_SIZE	Setting for the number of statements to consider while analyzing duplicate RDF terms.
static final RioSetting<String>	CHARSET	Setting for the character set to use for encoding strings (only applicable to version 2 of the binary RDF format).
static final RioSetting<Boolean>	RECYCLE_IDS	Setting for whether to recycle IDs while writing binary RDF files.
static final RioSetting<Long>	VERSION	Setting for the binary RDF format to use.

Method Summary

Methods inherited from class java.lang.Object

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

Field Details

VERSION

public static final RioSetting<Long> VERSION

Setting for the binary RDF format to use.

Defaults to 2.

Can be overridden by setting system property org.eclipse.rdf4j.rio.binary.format_version

BUFFER_SIZE

public static final RioSetting<Long> BUFFER_SIZE

Setting for the number of statements to consider while analyzing duplicate RDF terms. Terms that occur twice or more within the buffer of statements are written out (starting from the second occurrence) as identifiers.

Defaults to 8192.

Can be overridden by setting system property org.eclipse.rdf4j.rio.binary.buffer_size

CHARSET

public static final RioSetting<String> CHARSET

Setting for the character set to use for encoding strings (only applicable to version 2 of the binary RDF format).

Defaults to "UTF-8".

Can be overridden by setting system property org.eclipse.rdf4j.rio.binary.charset

RECYCLE_IDS

public static final RioSetting<Boolean> RECYCLE_IDS

Setting for whether to recycle IDs while writing binary RDF files. (only applicable to version 2 of the binary RDF format).

If enabled (the default), once an RDF term is no longer referenced in the buffer of statements (see also BUFFER_SIZE), the ID of that term can be reused and any in memory reference to that term is released. If disabled, once an RDF term is assigned an ID it is never released and an in-memory reference to that term is maintained in memory. Note that disabling this setting may decrease file size, but also may result in an OutOfMemoryError because heap memory used is for every term that is ever assigned an ID.

Defaults to true.

Can be overridden by setting system property org.eclipse.rdf4j.rio.binary.recycle_ids