Package org.apache.jena.riot.protobuf

Class ProtobufRDF

java.lang.Object

org.apache.jena.riot.protobuf.ProtobufRDF

public class ProtobufRDF
extends java.lang.Object

Operations on binary RDF using Google Protobuf.

An encoding use Apache Thrift is available in ThriftRDF.

Constructor Summary

Constructors

Constructor	Description
ProtobufRDF()

Method Summary

Modifier and Type	Method	Description
static void	apply(java.io.InputStream input, VisitorStreamRowProtoRDF action)	Send the contents of a RDF-encoded protobuf file to an "action"
static void	fileToStream(java.lang.String filename, StreamRDF dest)	Decode the contents of the file and send to the StreamRDF.
static void	inputStreamToStreamRDF(java.io.InputStream input, StreamRDF stream)	Read an input stream and send item to the StreamRDF.
static ResultSet	readResultSet(java.io.InputStream input)	Return a streaming ResultSet read from an input stream (with delimiters per row)
static StreamRDF	streamToFile(java.lang.String filename)	Create an StreamRDF for output.
static StreamRDF	streamToFile(java.lang.String filename, boolean withValues)	Create an StreamRDF for output.
static StreamRDF	streamToOutputStream(java.io.OutputStream output)	An StreamRDF that writes to an output stream.
static StreamRDF	streamToOutputStream(java.io.OutputStream output, boolean withValues)	An StreamRDF that writes to an output stream.
static void	writeResultSet(java.io.OutputStream out, ResultSet resultSet)	Write a ResultSet to an output stream (with delimiters per row)
static void	writeResultSet(java.io.OutputStream out, ResultSet resultSet, boolean withValues)	Write a ResultSet to an output stream (with delimiters per row)

Methods inherited from class java.lang.Object

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

Constructor Detail

ProtobufRDF

public ProtobufRDF()

Method Detail

streamToFile

public static StreamRDF streamToFile(java.lang.String filename)

Create an StreamRDF for output. A filename ending .gz will have a gzip compressor added to the output path. A filename of "-" is System.out. The file is closed when StreamRDF.finish() is called unless it is System.out. Call StreamRDF.start()...StreamRDF.finish().

Parameters:

filename - The file

Returns:

StreamRDF A stream to send to.

streamToFile

public static StreamRDF streamToFile(java.lang.String filename,
                                     boolean withValues)

Create an StreamRDF for output. A filenames ending .gz or .bz2 will have the respective compressor added to the output path. A filename of "-" is System.out. The file is closed when StreamRDF.finish() is called unless it is System.out. Call StreamRDF.start()...StreamRDF.finish().

Parameters:

filename - The file

withValues - - whether to encode numeric values as values.

Returns:

StreamRDF A stream to send to.

streamToOutputStream

public static StreamRDF streamToOutputStream(java.io.OutputStream output)

An StreamRDF that writes to an output stream. The output stream is written with "writeDelimitedTo".

streamToOutputStream

public static StreamRDF streamToOutputStream(java.io.OutputStream output,
                                             boolean withValues)

An StreamRDF that writes to an output stream. The output stream is written with "writeDelimitedTo".

fileToStream

public static void fileToStream(java.lang.String filename,
                                StreamRDF dest)

Decode the contents of the file and send to the StreamRDF. A filename ending .gz will have a gzip decompressor added. A filename of "-" is System.in.

Parameters:

filename - The file.

dest - Sink

inputStreamToStreamRDF

public static void inputStreamToStreamRDF(java.io.InputStream input,
                                          StreamRDF stream)

Read an input stream and send item to the StreamRDF. The input stream will be read with "parseDelimitedTo".

Parameters:

input - InputStream

stream - StreamRDF

apply

public static void apply(java.io.InputStream input,
                         VisitorStreamRowProtoRDF action)

Send the contents of a RDF-encoded protobuf file to an "action"

Parameters:

input - InputStream

action - Code to act on the row.

readResultSet

public static ResultSet readResultSet(java.io.InputStream input)

Return a streaming ResultSet read from an input stream (with delimiters per row)

writeResultSet

public static void writeResultSet(java.io.OutputStream out,
                                  ResultSet resultSet)

Write a ResultSet to an output stream (with delimiters per row)

writeResultSet

public static void writeResultSet(java.io.OutputStream out,
                                  ResultSet resultSet,
                                  boolean withValues)

Write a ResultSet to an output stream (with delimiters per row)