de.fuberlin.wiwiss.ng4j.trig
Class N3JenaWriterCommon

java.lang.Object
  de.fuberlin.wiwiss.ng4j.trig.N3JenaWriterCommon

All Implemented Interfaces:

RDFWriter

Direct Known Subclasses:

N3JenaWriterPP

public class N3JenaWriterCommon
extends Object
implements RDFWriter

Common framework for implementing N3 writers.

Version:

$Id: N3JenaWriterCommon.java,v 1.2 2004/12/17 11:15:31 cyganiak Exp $

Author:

Andy Seaborne

Field Summary

Fields inherited from interface com.hp.hpl.jena.rdf.model.RDFWriter

NSPREFIXPROPBASE

Constructor Summary

N3JenaWriterCommon()

Method Summary

protected String	absolutePropName(String propName)
protected int	calcPropertyPadding(String propStr)
protected int	countArcsTo(Property prop, Resource resource)
protected int	countArcsTo(Resource resource)
protected int	countProperties(Resource r)
protected int	countProperties(Resource r, Property p)
protected void	finishWriting()
protected String	formatLiteral(Literal literal)
protected String	formatNode(RDFNode node)
protected String	formatProperty(Property p)
protected String	formatResource(Resource r)
protected String	formatURI(String uriStr)
protected boolean	getBooleanValue(String prop, boolean defaultValue)
protected int	getIntValue(String prop, int defaultValue)
protected String	getPropValue(String prop)
protected String	getStringValue(String prop, String defaultValue)
protected String	localPropName(String propName)
protected static String	pad(int cols)
protected void	prepare(Model model)
protected ClosableIterator	preparePropertiesForSubject(Resource r)
protected void	processModel(Model baseModel)
protected Iterator	rdfListIterator(Resource r)
RDFErrorHandler	setErrorHandler(RDFErrorHandler errHandler)
Object	setProperty(String propName, Object propValue)
protected boolean	skipThisSubject(Resource r)
protected void	startWriting()
protected static void	string(StringBuffer sbuff, String s, boolean singleQuoteLiteral)
void	write(Model model, OutputStream output, String base) Write the model out in N3, encoded in in UTF-8
void	write(Model baseModel, Writer _out, String base) Write the model out in N3.
protected void	writeHeader(Model model)
protected void	writeLiteral(Literal literal)
protected void	writeModel(Model model)
protected void	writeObject(RDFNode node)
protected void	writeObjectList(Resource resource, Property property)
protected void	writeOneGraphNode(Resource subject)
protected void	writePrefixes(Model model)
protected void	writePropertiesForSubject(Resource subj)
protected void	writeSubject(Resource subject)

Methods inherited from class java.lang.Object

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

Constructor Detail

N3JenaWriterCommon

public N3JenaWriterCommon()

Method Detail

setErrorHandler

public RDFErrorHandler setErrorHandler(RDFErrorHandler errHandler)

Specified by:

setErrorHandler in interface RDFWriter

setProperty

public Object setProperty(String propName,
                          Object propValue)

Specified by:

setProperty in interface RDFWriter

write

public void write(Model baseModel,
                  Writer _out,
                  String base)

Write the model out in N3. The writer should be one suitable for UTF-8 which excludes a PrintWriter or a FileWriter which use default character set. Examples:

 try {
      Writer w =  new BufferedWriter(new OutputStreamWriter(output, "UTF-8")) ;
      model.write(w, base) ;
      try { w.flush() ; } catch (IOException ioEx) {}
  } catch (java.io.UnsupportedEncodingException ex) {} //UTF-8 is required so can't happen
 

or

 try {
     OutputStream out = new FileOutputStream(file) ;
     Writer w =  new BufferedWriter(new OutputStreamWriter(out, "UTF-8")) ;
     model.write(w, base) ;
 }
 catch (java.io.UnsupportedEncodingException ex) {}
 catch (java.io.FileNotFoundException noFileEx) { ... }
 

Specified by:

write in interface RDFWriter

See Also:

write(Model,Writer,String)

write

public void write(Model model,
                  OutputStream output,
                  String base)

Write the model out in N3, encoded in in UTF-8

Specified by:

write in interface RDFWriter

See Also:

write(Model,Writer,String)

startWriting

protected void startWriting()

finishWriting

protected void finishWriting()

prepare

protected void prepare(Model model)

processModel

protected void processModel(Model baseModel)

writeModel

protected void writeModel(Model model)

writeOneGraphNode

protected void writeOneGraphNode(Resource subject)

writePropertiesForSubject

protected void writePropertiesForSubject(Resource subj)

skipThisSubject

protected boolean skipThisSubject(Resource r)

writeSubject

protected void writeSubject(Resource subject)

writeHeader

protected void writeHeader(Model model)

writePrefixes

protected void writePrefixes(Model model)

writeObjectList

protected void writeObjectList(Resource resource,
                               Property property)

formatNode

protected String formatNode(RDFNode node)

writeObject

protected void writeObject(RDFNode node)

writeLiteral

protected void writeLiteral(Literal literal)

preparePropertiesForSubject

protected ClosableIterator preparePropertiesForSubject(Resource r)

formatResource

protected String formatResource(Resource r)

formatLiteral

protected String formatLiteral(Literal literal)

formatProperty

protected String formatProperty(Property p)

formatURI

protected String formatURI(String uriStr)

string

protected static void string(StringBuffer sbuff,
                             String s,
                             boolean singleQuoteLiteral)

calcPropertyPadding

protected int calcPropertyPadding(String propStr)

pad

protected static String pad(int cols)

countProperties

protected int countProperties(Resource r)

countProperties

protected int countProperties(Resource r,
                              Property p)

countArcsTo

protected int countArcsTo(Resource resource)

countArcsTo

protected int countArcsTo(Property prop,
                          Resource resource)

rdfListIterator

protected Iterator rdfListIterator(Resource r)

getStringValue

protected String getStringValue(String prop,
                                String defaultValue)

getBooleanValue

protected boolean getBooleanValue(String prop,
                                  boolean defaultValue)

getIntValue

protected int getIntValue(String prop,
                          int defaultValue)

getPropValue

protected String getPropValue(String prop)

absolutePropName

protected String absolutePropName(String propName)

localPropName

protected String localPropName(String propName)