com.epimorphics.json

Class RDFJSONModReader

java.lang.Object

com.epimorphics.json.RDFJSONModReader

public class RDFJSONModReader
extends Object

Read a graph serialized using the modified JSON format. This implementation is primarily for testing purposes, a more efficient and debug-friendly streaming solution such as the RIOT would be possible.

Not thread safe, the parse contains state, allocate a new reader for each use.

In lieu of the W3C standard we are mostly following the Talis format. Unfortunately that doesn't cater for lists in a usable fashion and our primary use case is outputting lists of results. So we extend the Talis format with a value type "list" which is rendered in JSON as an array.

Author:

Dave Reynolds

Field Summary

Fields

Modifier and Type	Field and Description
static String	BNODE_TYPE
protected Map<String,org.apache.jena.graph.Node>	bNodeTable
static String	DATATYPE_KEY
static String	LANG_KEY
static String	LIST_TYPE
static String	LITERAL_TYPE
static String	TYPE_KEY
static String	URI_TYPE
static String	VALUE_KEY

Constructor Summary

Constructors

Constructor and Description
RDFJSONModReader()

Method Summary

Modifier and Type	Method and Description
protected org.apache.jena.graph.Node	bNodeFor(String id)
protected org.apache.jena.atlas.json.JsonValue	getRequiredKey(org.apache.jena.atlas.json.JsonObject obj, String key)
protected String	getValueAsString(org.apache.jena.atlas.json.JsonObject obj)
protected String	getValueAsString(org.apache.jena.atlas.json.JsonObject obj, String key)
org.apache.jena.rdf.model.Model	modelFromJson(org.apache.jena.atlas.json.JsonObject json) Parse a JSON structure into a newly-allocated RDF model.
org.apache.jena.rdf.model.Model	parse(InputStream in) Parse a JSON format stream into an RDF model.
org.apache.jena.rdf.model.Model	parse(String in) Parse a JSON format String into an RDF model.
void	parseJson(org.apache.jena.atlas.json.JsonObject json, org.apache.jena.graph.Graph graph) Parse a JSON structure into an RDF graph..
void	parseJson(org.apache.jena.atlas.json.JsonObject json, org.apache.jena.rdf.model.Model model) Parse a JSON structure into an RDF model.
protected org.apache.jena.graph.Node	parseValue(org.apache.jena.atlas.json.JsonValue value, org.apache.jena.graph.Graph graph)

Methods inherited from class java.lang.Object

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

Field Detail

TYPE_KEY

public static final String TYPE_KEY

See Also:

Constant Field Values

URI_TYPE

public static final String URI_TYPE

See Also:

Constant Field Values

BNODE_TYPE

public static final String BNODE_TYPE

See Also:

Constant Field Values

LIST_TYPE

public static final String LIST_TYPE

See Also:

Constant Field Values

LITERAL_TYPE

public static final String LITERAL_TYPE

See Also:

Constant Field Values

DATATYPE_KEY

public static final String DATATYPE_KEY

See Also:

Constant Field Values

LANG_KEY

public static final String LANG_KEY

See Also:

Constant Field Values

VALUE_KEY

public static final String VALUE_KEY

See Also:

Constant Field Values

bNodeTable

protected Map<String,org.apache.jena.graph.Node> bNodeTable

Constructor Detail

RDFJSONModReader

public RDFJSONModReader()

Method Detail

parse

public org.apache.jena.rdf.model.Model parse(InputStream in)

Parse a JSON format stream into an RDF model.

parse

public org.apache.jena.rdf.model.Model parse(String in)

Parse a JSON format String into an RDF model.

modelFromJson

public org.apache.jena.rdf.model.Model modelFromJson(org.apache.jena.atlas.json.JsonObject json)

Parse a JSON structure into a newly-allocated RDF model.

Parameters:

json - the JSON structure to parse

parseJson

public void parseJson(org.apache.jena.atlas.json.JsonObject json,
                      org.apache.jena.rdf.model.Model model)

Parse a JSON structure into an RDF model.

Parameters:

json - the JSON structure to parse

model - the model into which to place the results

parseJson

public void parseJson(org.apache.jena.atlas.json.JsonObject json,
                      org.apache.jena.graph.Graph graph)

Parse a JSON structure into an RDF graph..

Parameters:

json - the JSON structure to parse

model - the model into which to place the results

parseValue

protected org.apache.jena.graph.Node parseValue(org.apache.jena.atlas.json.JsonValue value,
                                                org.apache.jena.graph.Graph graph)

getRequiredKey

protected org.apache.jena.atlas.json.JsonValue getRequiredKey(org.apache.jena.atlas.json.JsonObject obj,
                                                              String key)

getValueAsString

protected String getValueAsString(org.apache.jena.atlas.json.JsonObject obj)

getValueAsString

protected String getValueAsString(org.apache.jena.atlas.json.JsonObject obj,
                                  String key)

bNodeFor

protected org.apache.jena.graph.Node bNodeFor(String id)