Class FileIO

java.lang.Object

org.eclipse.rdf4j.sail.memory.FileIO

class FileIO
extends Object

Functionality to read and write MemoryStore to/from a file.

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	BMSF_VERSION	The version number of the current format.
static final int	BNODE_MARKER
private final CharsetDecoder	charsetDecoder
private final CharsetEncoder	charsetEncoder
static final int	DATATYPE_LITERAL_MARKER
static final int	EOF_MARKER
static final int	EXPL_QUAD_MARKER
static final int	EXPL_TRIPLE_MARKER
private int	formatVersion
static final int	INF_QUAD_MARKER
static final int	INF_TRIPLE_MARKER
static final int	LANG_LITERAL_MARKER
private static final byte[]	MAGIC_NUMBER	Magic number for Binary Memory Store Files
static final int	NAMESPACE_MARKER
static final int	PLAIN_LITERAL_MARKER
static final int	RDFSTAR_TRIPLE_MARKER
static final int	URI_MARKER
private final MemValueFactory	vf

Constructor Summary

Constructors

Constructor	Description
FileIO(MemValueFactory vf)

Method Summary

Modifier and Type	Method	Description
void	read(File dataFile, SailSink explicit, SailSink inferred)
private void	readNamespace(DataInputStream dataIn, SailSink store)
private void	readStatement(boolean hasContext, boolean isExplicit, DataInputStream dataIn, SailSink explicit, SailSink inferred)
private String	readString(DataInputStream dataIn)
private String	readStringV1(DataInputStream dataIn)	Reads a string from the version 1 format, i.e.
private String	readStringV2(DataInputStream dataIn)	Reads a string from the version 2 format.
private Value	readValue(DataInputStream dataIn)
private void	write(SailDataset explicit, SailDataset inferred, File dataFile)
void	write(SailDataset explicit, SailDataset inferred, File syncFile, File dataFile)
private void	writeNamespaces(SailDataset store, DataOutputStream dataOut)
void	writeStatement(CloseableIteration<? extends Statement, SailException> stIter, int tripleMarker, int quadMarker, DataOutputStream dataOut)
private void	writeStatements(SailDataset explicit, SailDataset inferred, DataOutputStream dataOut)
private void	writeString(String s, DataOutputStream dataOut)
private void	writeValue(Value value, DataOutputStream dataOut)

Methods inherited from class Object

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

Field Details

MAGIC_NUMBER

private static final byte[] MAGIC_NUMBER

Magic number for Binary Memory Store Files

BMSF_VERSION

private static final int BMSF_VERSION

The version number of the current format.

See Also:

• Constant Field Values

NAMESPACE_MARKER

public static final int NAMESPACE_MARKER

See Also:

• Constant Field Values

EXPL_TRIPLE_MARKER

public static final int EXPL_TRIPLE_MARKER

See Also:

• Constant Field Values

EXPL_QUAD_MARKER

public static final int EXPL_QUAD_MARKER

See Also:

• Constant Field Values

INF_TRIPLE_MARKER

public static final int INF_TRIPLE_MARKER

See Also:

• Constant Field Values

INF_QUAD_MARKER

public static final int INF_QUAD_MARKER

See Also:

• Constant Field Values

URI_MARKER

public static final int URI_MARKER

See Also:

• Constant Field Values

BNODE_MARKER

public static final int BNODE_MARKER

See Also:

• Constant Field Values

PLAIN_LITERAL_MARKER

public static final int PLAIN_LITERAL_MARKER

See Also:

• Constant Field Values

LANG_LITERAL_MARKER

public static final int LANG_LITERAL_MARKER

See Also:

• Constant Field Values

DATATYPE_LITERAL_MARKER

public static final int DATATYPE_LITERAL_MARKER

See Also:

• Constant Field Values

RDFSTAR_TRIPLE_MARKER

public static final int RDFSTAR_TRIPLE_MARKER

See Also:

• Constant Field Values

EOF_MARKER

public static final int EOF_MARKER

See Also:

• Constant Field Values

vf

private final MemValueFactory vf

charsetEncoder

private final CharsetEncoder charsetEncoder

charsetDecoder

private final CharsetDecoder charsetDecoder

formatVersion

private int formatVersion

Constructor Details

FileIO

public FileIO(MemValueFactory vf)

Method Details

write

public void write(SailDataset explicit,
 SailDataset inferred,
 File syncFile,
 File dataFile)
           throws IOException,
SailException

Throws:

IOException

SailException

write

private void write(SailDataset explicit,
 SailDataset inferred,
 File dataFile)
            throws IOException,
SailException

Throws:

IOException

SailException

read

public void read(File dataFile,
 SailSink explicit,
 SailSink inferred)
          throws IOException,
SailException

Throws:

IOException

SailException

writeNamespaces

private void writeNamespaces(SailDataset store,
 DataOutputStream dataOut)
                      throws IOException,
SailException

Throws:

IOException

SailException

readNamespace

private void readNamespace(DataInputStream dataIn,
 SailSink store)
                    throws IOException,
SailException

Throws:

IOException

SailException

writeStatements

private void writeStatements(SailDataset explicit,
 SailDataset inferred,
 DataOutputStream dataOut)
                      throws IOException,
SailException

Throws:

IOException

SailException

writeStatement

public void writeStatement(CloseableIteration<? extends Statement, SailException> stIter,
 int tripleMarker,
 int quadMarker,
 DataOutputStream dataOut)
                    throws IOException,
SailException

Throws:

IOException

SailException

readStatement

private void readStatement(boolean hasContext,
 boolean isExplicit,
 DataInputStream dataIn,
 SailSink explicit,
 SailSink inferred)
                    throws IOException,
ClassCastException,
SailException

Throws:

IOException

ClassCastException

SailException

writeValue

private void writeValue(Value value,
 DataOutputStream dataOut)
                 throws IOException

Throws:

IOException

readValue

private Value readValue(DataInputStream dataIn)
                 throws IOException,
ClassCastException

Throws:

IOException

ClassCastException

writeString

private void writeString(String s,
 DataOutputStream dataOut)
                  throws IOException

Throws:

IOException

readString

private String readString(DataInputStream dataIn)
                   throws IOException

Throws:

IOException

readStringV1

private String readStringV1(DataInputStream dataIn)
                     throws IOException

Reads a string from the version 1 format, i.e. in Java's

invalid @link

{@link DataInput#modified-utf-8

Modified UTF-8}.

Throws:

IOException

readStringV2

private String readStringV2(DataInputStream dataIn)
                     throws IOException

Reads a string from the version 2 format. Strings are encoded as UTF-8 and are preceeded by a 32-bit integer (high byte first) specifying the length of the encoded string.

Throws:

IOException