Module org.apache.jena.rdfpatch

Package org.apache.jena.rdfpatch.text

Class RDFChangesWriterText

java.lang.Object

org.apache.jena.rdfpatch.text.RDFChangesWriterText

All Implemented Interfaces:

AutoCloseable, RDFChanges

Direct Known Subclasses:

RDFChangesManagedOutput

public class RDFChangesWriterText
extends Object
implements RDFChanges, AutoCloseable

Write out a changes as a stream of syntax tokens.

Constructor Summary

Constructors

Constructor	Description
RDFChangesWriterText(TokenWriter out)

Method Summary

Modifier and Type	Method	Description
void	add(Node g, Node s, Node p, Node o)	Notification that a quad or triple is added.
void	addPrefix(Node gn, String prefix, String uriStr)	Add a prefix.
void	close()
static RDFChangesWriterText	create(OutputStream out)	Create a RDFChangesWriter with standard text output.
void	delete(Node g, Node s, Node p, Node o)	Notification that a quad or triple is deleted.
void	deletePrefix(Node gn, String prefix)	Delete a prefix.
void	finish()	Finish processing.
void	header(String field, Node value)	Header field.
void	segment()	Segment marker.
void	start()	Start processing.
void	txnAbort()	Indicator that a transaction aborts
void	txnBegin()	Indicator that a transaction begins, or becomes a write transaction.
void	txnCommit()	Indicator that a transaction commits.

Methods inherited from class java.lang.Object

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

Constructor Details

RDFChangesWriterText

public RDFChangesWriterText(TokenWriter out)

Method Details

create

public static RDFChangesWriterText create(OutputStream out)

Create a RDFChangesWriter with standard text output.

start

public void start()

Description copied from interface: RDFChanges

Start processing. The exact meaning is implementation dependent. This should be paired with a RDFChanges.finish().

Specified by:

start in interface RDFChanges

finish

public void finish()

Description copied from interface: RDFChanges

Finish processing. The exact meaning is implementation dependent. This should be paired with a RDFChanges.start().

Specified by:

finish in interface RDFChanges

header

public void header(String field,
 Node value)

Description copied from interface: RDFChanges

Header field. Headers are metadata about the changes being made.

Specified by:

header in interface RDFChanges

close

public void close()

Specified by:

close in interface AutoCloseable

add

public void add(Node g,
 Node s,
 Node p,
 Node o)

Description copied from interface: RDFChanges

Notification that a quad or triple is added. A stream of Triples outside a dataset will have null for the graph name. Inside an RDF Dataset, it may be more natural to use "urn:x-arq:DefaultGraph" or "urn:x-arq:DefaultGraphNode" in which case test with Quad.isDefaultGraph(Node).

It is not defined whether the add happens before or after this notification all.

Specified by:

add in interface RDFChanges

delete

public void delete(Node g,
 Node s,
 Node p,
 Node o)

Description copied from interface: RDFChanges

Notification that a quad or triple is deleted. A stream of Triples outside a dataset will have null for the graph name. Inside an RDF Dataset, it may be more natural to use "urn:x-arq:DefaultGraph" or "urn:x-arq:DefaultGraphNode" in which case test with Quad.isDefaultGraph(Node).

It is not defined whether the delete happens before or after this notification all.

Specified by:

delete in interface RDFChanges

addPrefix

public void addPrefix(Node gn,
 String prefix,
 String uriStr)

Description copied from interface: RDFChanges

Add a prefix. The graph name follows the same rules as RDFChanges.add(org.apache.jena.graph.Node, org.apache.jena.graph.Node, org.apache.jena.graph.Node, org.apache.jena.graph.Node).

Specified by:

addPrefix in interface RDFChanges

deletePrefix

public void deletePrefix(Node gn,
 String prefix)

Description copied from interface: RDFChanges

Delete a prefix. The graph name follows the same rules as RDFChanges.add(org.apache.jena.graph.Node, org.apache.jena.graph.Node, org.apache.jena.graph.Node, org.apache.jena.graph.Node).

Specified by:

deletePrefix in interface RDFChanges

txnBegin

public void txnBegin()

Description copied from interface: RDFChanges

Indicator that a transaction begins, or becomes a write transaction.

Specified by:

txnBegin in interface RDFChanges

txnCommit

public void txnCommit()

Description copied from interface: RDFChanges

Indicator that a transaction commits. If this throws an exception, the transaction will be aborted locally and not commit after all.

Specified by:

txnCommit in interface RDFChanges

txnAbort

public void txnAbort()

Description copied from interface: RDFChanges

Indicator that a transaction aborts

Specified by:

txnAbort in interface RDFChanges

segment

public void segment()

Description copied from interface: RDFChanges

Segment marker.

A segment is a number of transactions; the grouping rationale is not defined by RDF Patch.

It might be used to indicate a logical collection of change transactions in a long stream of transactions.

There is no guarantee it will be used.

Segments must contain complete transactions.
Segments must not span start-finish pairs.

Specified by:

segment in interface RDFChanges