org.mulgara.mrg.writer
Class XMLWriter

java.lang.Object
  org.mulgara.mrg.writer.AbstractGraphWriter
      org.mulgara.mrg.writer.XMLWriter

All Implemented Interfaces:

GraphWriter

public class XMLWriter
extends AbstractGraphWriter
implements GraphWriter

Creates a writer specifically for N3 output.

Field Summary

Fields inherited from class org.mulgara.mrg.writer.AbstractGraphWriter

base, graph, prefixGen, rns

Constructor Summary

XMLWriter(Graph graph, URI base)
Creates a graph writer.

XMLWriter(Graph graph, URI base, Map<String,URI> ns)
Creates a graph writer.

Method Summary

protected void	emitPropVal(PrintStream o, int i, Uri property, ObjectNode value) Prints a single property/value pair where the value is a Uri or a Bnode.
protected void	emitPropVal(PrintStream o, Uri property, Literal value) Prints a single property/value pair where the value is a literal.
protected String	formatForAbout(Uri u) Format a URI reference for use in an about=.
protected String	formatForTag(Uri u) Format a URI reference for use in an XML tag.
void	scanNamespaces() Scans the graph for valid namespaces.
protected boolean	testNamespace(String ns) Tests a potential namespace to see if it is considered to be OK.
void	writeTo(OutputStream out) Writes the graph to a stream.

Methods inherited from class org.mulgara.mrg.writer.AbstractGraphWriter

getNamespaces, resetNamespaces, setNamespaces, setNamespacesByString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mulgara.mrg.writer.GraphWriter

getNamespaces, resetNamespaces, setNamespaces, setNamespacesByString

Constructor Detail

XMLWriter

public XMLWriter(Graph graph,
                 URI base)

Creates a graph writer.

Parameters:

graph - The graph to be written by this writer.

XMLWriter

public XMLWriter(Graph graph,
                 URI base,
                 Map<String,URI> ns)

Creates a graph writer.

Parameters:

graph - The graph to be written by this writer.

ns - The namespaces to use while emitting this graph.

Method Detail

scanNamespaces

public void scanNamespaces()

Scans the graph for valid namespaces. Adds in the RDF namespace by default, even if this is not explicitly used in the graph.

Specified by:

scanNamespaces in interface GraphWriter

Overrides:

scanNamespaces in class AbstractGraphWriter

See Also:

AbstractGraphWriter.scanNamespaces()

writeTo

public void writeTo(OutputStream out)

Description copied from interface: GraphWriter

Writes the graph to a stream.

Specified by:

writeTo in interface GraphWriter

Parameters:

out - The stream to write the graph to.

See Also:

GraphWriter.writeTo(java.io.OutputStream)

emitPropVal

protected void emitPropVal(PrintStream o,
                           int i,
                           Uri property,
                           ObjectNode value)

Prints a single property/value pair where the value is a Uri or a Bnode.

Parameters:

o - The print stream to use as output.

i - The indent amount.

property - The property.

value - The literal value for the property.

emitPropVal

protected void emitPropVal(PrintStream o,
                           Uri property,
                           Literal value)

Prints a single property/value pair where the value is a literal.

Parameters:

o - The print stream to use as output.

property - The property.

value - The literal value for the property.

formatForAbout

protected String formatForAbout(Uri u)

Format a URI reference for use in an about=.

Parameters:

u - The URI reference to present.

Returns:

A string suitable for about=""

formatForTag

protected String formatForTag(Uri u)

Format a URI reference for use in an XML tag.

Parameters:

u - The URI reference to present.

Returns:

A QName.

testNamespace

protected boolean testNamespace(String ns)

Tests a potential namespace to see if it is considered to be OK.

Overrides:

testNamespace in class AbstractGraphWriter

Parameters:

ns - The namespace to test.

Returns:

true iff the namespace can be used in this type of document.