Package org.eclipse.rdf4j.rio.binary
Class BinaryRDFWriter
- java.lang.Object
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- org.eclipse.rdf4j.rio.helpers.AbstractRDFWriter
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- org.eclipse.rdf4j.rio.binary.BinaryRDFWriter
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- All Implemented Interfaces:
ByteSink
,Sink
,RDFHandler
,RDFWriter
public class BinaryRDFWriter extends AbstractRDFWriter implements ByteSink
ARDFWriter
for the binary RDF format.
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Nested Class Summary
Nested Classes Modifier and Type Class Description private static class
BinaryRDFWriter.ValueMeta
Holds the frequency of a value within the currentstatementQueue
as well as an identifier if any has been assigned.
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Field Summary
Fields Modifier and Type Field Description private int
bufferSize
private java.nio.charset.Charset
charset
private int
formatVersion
private java.util.Queue<java.lang.Integer>
idPool
private int
nextId
private java.io.DataOutputStream
out
private boolean
recycleIds
private java.util.Queue<Statement>
statementQueue
private java.util.Map<Value,BinaryRDFWriter.ValueMeta>
valueMeta
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Fields inherited from class org.eclipse.rdf4j.rio.helpers.AbstractRDFWriter
namespaceTable, statementConsumer
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Constructor Summary
Constructors Constructor Description BinaryRDFWriter(java.io.OutputStream out)
BinaryRDFWriter(java.io.OutputStream out, int bufferSize)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description private void
assignId(Value v, BinaryRDFWriter.ValueMeta meta)
protected void
consumeStatement(Statement st)
Consume a statement.void
endRDF()
Signals the end of the RDF data.java.io.OutputStream
getOutputStream()
get theOutputStream
used by thisByteSink
.RDFFormat
getRDFFormat()
Gets the RDF format that this RDFWriter uses.java.util.Collection<RioSetting<?>>
getSupportedSettings()
void
handleComment(java.lang.String comment)
Handles a comment.void
handleNamespace(java.lang.String prefix, java.lang.String uri)
Handles a namespace declaration/definition.private void
handleWriterConfig()
private void
incValueFreq(Value v)
void
startRDF()
Signals the start of the RDF data.private void
writeBNode(BNode bnode)
private void
writeInt(int i)
private void
writeLiteral(Literal literal)
private void
writeStatement()
Writes the first statement from the statement queueprivate void
writeString(java.lang.String s)
private void
writeTriple(Triple triple)
private void
writeURI(IRI uri)
private void
writeValue(Value value)
private void
writeValueOrId(Value value)
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Methods inherited from class org.eclipse.rdf4j.rio.helpers.AbstractRDFWriter
checkWritingStarted, getFileFormat, getWriterConfig, handleStatement, isWritingStarted, set, setWriterConfig
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.eclipse.rdf4j.common.io.Sink
acceptsFileFormat, getFileFormat
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Field Detail
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statementQueue
private final java.util.Queue<Statement> statementQueue
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bufferSize
private int bufferSize
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valueMeta
private final java.util.Map<Value,BinaryRDFWriter.ValueMeta> valueMeta
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nextId
private int nextId
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idPool
private final java.util.Queue<java.lang.Integer> idPool
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out
private final java.io.DataOutputStream out
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formatVersion
private int formatVersion
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charset
private java.nio.charset.Charset charset
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recycleIds
private boolean recycleIds
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Method Detail
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getRDFFormat
public RDFFormat getRDFFormat()
Description copied from interface:RDFWriter
Gets the RDF format that this RDFWriter uses.- Specified by:
getRDFFormat
in interfaceRDFWriter
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getSupportedSettings
public java.util.Collection<RioSetting<?>> getSupportedSettings()
- Specified by:
getSupportedSettings
in interfaceRDFWriter
- Overrides:
getSupportedSettings
in classAbstractRDFWriter
- Returns:
- A collection of
RioSetting
s that are supported by this RDFWriter.
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getOutputStream
public java.io.OutputStream getOutputStream()
Description copied from interface:ByteSink
get theOutputStream
used by thisByteSink
.- Specified by:
getOutputStream
in interfaceByteSink
- Returns:
- an
OutputStream
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startRDF
public void startRDF() throws RDFHandlerException
Description copied from interface:RDFHandler
Signals the start of the RDF data. This method is called before any data is reported.- Specified by:
startRDF
in interfaceRDFHandler
- Overrides:
startRDF
in classAbstractRDFWriter
- Throws:
RDFHandlerException
- If the RDF handler has encountered an unrecoverable error.
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handleWriterConfig
private void handleWriterConfig()
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endRDF
public void endRDF() throws RDFHandlerException
Description copied from interface:RDFHandler
Signals the end of the RDF data. This method is called when all data has been reported.- Specified by:
endRDF
in interfaceRDFHandler
- Throws:
RDFHandlerException
- If the RDF handler has encountered an unrecoverable error.
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handleNamespace
public void handleNamespace(java.lang.String prefix, java.lang.String uri) throws RDFHandlerException
Description copied from interface:RDFHandler
Handles a namespace declaration/definition. A namespace declaration associates a (short) prefix string with the namespace's URI. The prefix for default namespaces, which do not have an associated prefix, are represented as empty strings.- Specified by:
handleNamespace
in interfaceRDFHandler
- Overrides:
handleNamespace
in classAbstractRDFWriter
- Parameters:
prefix
- The prefix for the namespace, or an empty string in case of a default namespace.uri
- The URI that the prefix maps to.- Throws:
RDFHandlerException
- If the RDF handler has encountered an unrecoverable error.
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handleComment
public void handleComment(java.lang.String comment) throws RDFHandlerException
Description copied from interface:RDFHandler
Handles a comment.- Specified by:
handleComment
in interfaceRDFHandler
- Parameters:
comment
- The comment.- Throws:
RDFHandlerException
- If the RDF handler has encountered an unrecoverable error.
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consumeStatement
protected void consumeStatement(Statement st)
Description copied from class:AbstractRDFWriter
Consume a statement.Extending classes must override this method instead of overriding
AbstractRDFWriter.handleStatement(Statement)
in order to benefit from automatic handling of RDF-star conversion or encoding.- Overrides:
consumeStatement
in classAbstractRDFWriter
- Parameters:
st
- the statement to consume.
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writeStatement
private void writeStatement() throws RDFHandlerException, java.io.IOException
Writes the first statement from the statement queue- Throws:
RDFHandlerException
java.io.IOException
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incValueFreq
private void incValueFreq(Value v)
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assignId
private void assignId(Value v, BinaryRDFWriter.ValueMeta meta)
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writeValueOrId
private void writeValueOrId(Value value) throws RDFHandlerException, java.io.IOException
- Throws:
RDFHandlerException
java.io.IOException
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writeValue
private void writeValue(Value value) throws RDFHandlerException, java.io.IOException
- Throws:
RDFHandlerException
java.io.IOException
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writeURI
private void writeURI(IRI uri) throws java.io.IOException
- Throws:
java.io.IOException
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writeBNode
private void writeBNode(BNode bnode) throws java.io.IOException
- Throws:
java.io.IOException
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writeLiteral
private void writeLiteral(Literal literal) throws java.io.IOException
- Throws:
java.io.IOException
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writeTriple
private void writeTriple(Triple triple) throws java.io.IOException
- Throws:
java.io.IOException
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writeString
private void writeString(java.lang.String s) throws java.io.IOException
- Throws:
java.io.IOException
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writeInt
private void writeInt(int i) throws java.io.IOException
- Throws:
java.io.IOException
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