org.apache.jena.tdb

Class TDBFactory

java.lang.Object

org.apache.jena.tdb.TDBFactory

public class TDBFactory
extends Object

Public factory for creating objects datasets backed by TDB storage

Method Summary

Modifier and Type	Method and Description
static Dataset	assembleDataset(String assemblerFile) Read the file and assembler a dataset
static Dataset	createDataset() Create or connect to a TDB dataset backed by an in-memory block manager.
static Dataset	createDataset(org.apache.jena.tdb.base.file.Location location) Create or connect to a TDB-backed dataset
static Dataset	createDataset(String dir) Create or connect to a TDB-backed dataset
static DatasetGraph	createDatasetGraph() Create a TDB-backed dataset (graph-level) in memory (for testing)
static DatasetGraph	createDatasetGraph(org.apache.jena.tdb.base.file.Location location) Create or connect to a TDB-backed dataset (graph-level)
static DatasetGraph	createDatasetGraph(String directory) Create or connect to a TDB-backed dataset (graph-level)
static boolean	inUseLocation(org.apache.jena.tdb.base.file.Location location) Test whether a location already has a TDB database or whether a call to TDBFactory will cause a new, fresh TDB database to be created (pragmatic tests).
static boolean	inUseLocation(String directory) Test whether a location already has a TDB database or whether a call to TDBFactory will cause a new, fresh TDB database to be created (pragmatic tests).
static boolean	isBackedByTDB(Dataset dataset) Test whether a dataset is backed by TDB.
static boolean	isBackedByTDB(DatasetGraph datasetGraph) Test whether a dataset is backed by TDB.
static org.apache.jena.tdb.base.file.Location	location(Dataset dataset) Return the location of a dataset if it is backed by TDB, else null
static org.apache.jena.tdb.base.file.Location	location(DatasetGraph datasetGraph) Return the location of a DatasetGraph if it is backed by TDB, else null
static void	release(Dataset dataset) Release from the JVM.
static void	release(DatasetGraph dataset) Release from the JVM.
static void	setup(org.apache.jena.tdb.base.file.Location location, org.apache.jena.tdb.setup.StoreParams params) Set the StoreParams for specific Location.

Methods inherited from class java.lang.Object

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

Method Detail

assembleDataset

public static Dataset assembleDataset(String assemblerFile)

Read the file and assembler a dataset

createDataset

public static Dataset createDataset(String dir)

Create or connect to a TDB-backed dataset

createDataset

public static Dataset createDataset(org.apache.jena.tdb.base.file.Location location)

Create or connect to a TDB-backed dataset

createDataset

public static Dataset createDataset()

Create or connect to a TDB dataset backed by an in-memory block manager. For testing.

createDatasetGraph

public static DatasetGraph createDatasetGraph(String directory)

Create or connect to a TDB-backed dataset (graph-level)

createDatasetGraph

public static DatasetGraph createDatasetGraph(org.apache.jena.tdb.base.file.Location location)

Create or connect to a TDB-backed dataset (graph-level)

createDatasetGraph

public static DatasetGraph createDatasetGraph()

Create a TDB-backed dataset (graph-level) in memory (for testing)

release

public static void release(Dataset dataset)

Release from the JVM. All caching is lost.

release

public static void release(DatasetGraph dataset)

Release from the JVM. All caching is lost.

isBackedByTDB

public static boolean isBackedByTDB(Dataset dataset)

Test whether a dataset is backed by TDB.

isBackedByTDB

public static boolean isBackedByTDB(DatasetGraph datasetGraph)

Test whether a dataset is backed by TDB.

location

public static org.apache.jena.tdb.base.file.Location location(Dataset dataset)

Return the location of a dataset if it is backed by TDB, else null

location

public static org.apache.jena.tdb.base.file.Location location(DatasetGraph datasetGraph)

Return the location of a DatasetGraph if it is backed by TDB, else null

inUseLocation

public static boolean inUseLocation(String directory)

Test whether a location already has a TDB database or whether a call to TDBFactory will cause a new, fresh TDB database to be created (pragmatic tests). The directory may be empty, or not exist. Existing databases return "true".

inUseLocation

public static boolean inUseLocation(org.apache.jena.tdb.base.file.Location location)

Test whether a location already has a TDB database or whether a call to TDBFactory will cause a new, fresh TDB database to be created (pragmatic tests). The directory may be empty, or not exist. Existing databases return "true".

setup

public static void setup(org.apache.jena.tdb.base.file.Location location,
                         org.apache.jena.tdb.setup.StoreParams params)

Set the StoreParams for specific Location. This call must only be called before a dataset from Location is created. This operation should be used with care; bad choices of StoreParams can reduce performance. See documentation.

Parameters:

location - The persistent storage location

params - StoreParams to use

Throws:

IllegalStateException - If the dataset has already been setup.