forked from kevin.shehu/GGD
125 lines
4.7 KiB
Java
125 lines
4.7 KiB
Java
//package JSON2RDF;
|
|
//
|
|
//import java.io.InputStream;
|
|
//import java.io.Reader;
|
|
//import java.util.ArrayDeque;
|
|
//import java.util.Deque;
|
|
//import java.util.HashMap;
|
|
//import java.util.Map;
|
|
//import javax.json.Json;
|
|
//import javax.json.stream.JsonParser;
|
|
//import org.apache.jena.datatypes.xsd.XSDDatatype;
|
|
//import org.apache.jena.graph.Node;
|
|
//import org.apache.jena.graph.NodeFactory;
|
|
//import org.apache.jena.graph.Triple;
|
|
//import org.apache.jena.riot.system.IRIResolver;
|
|
//import org.apache.jena.riot.system.StreamRDF;
|
|
//
|
|
//
|
|
//public class JsonStreamRDFWriter
|
|
//{
|
|
//
|
|
// private final JsonParser parser;
|
|
// private final StreamRDF rdfStream;
|
|
// private final IRIResolver iriResolver;
|
|
//
|
|
// public JsonStreamRDFWriter(Reader reader, StreamRDF rdfStream, String baseURI)
|
|
// {
|
|
// this(Json.createParser(reader), rdfStream, baseURI);
|
|
// }
|
|
//
|
|
// public JsonStreamRDFWriter(InputStream is, StreamRDF rdfStream, String baseURI)
|
|
// {
|
|
// this(Json.createParser(is), rdfStream, baseURI);
|
|
// }
|
|
//
|
|
// public JsonStreamRDFWriter(JsonParser parser, StreamRDF rdfStream, String baseURI)
|
|
// {
|
|
// this.parser = parser;
|
|
// this.rdfStream = rdfStream;
|
|
// this.iriResolver = IRIResolver.create(baseURI);
|
|
// }
|
|
//
|
|
// public void convert()
|
|
// {
|
|
// getStreamRDF().start();
|
|
//
|
|
// write(getParser(), getStreamRDF(), getIRIResolver());
|
|
//
|
|
// getStreamRDF().finish();
|
|
// }
|
|
//
|
|
// public static void write(JsonParser parser, StreamRDF rdfStream, IRIResolver iriResolver)
|
|
// {
|
|
// Deque<Node> subjectStack = new ArrayDeque<>();
|
|
// Map<Node, Node> arrayProperties = new HashMap<>();
|
|
//
|
|
// Node property = null;
|
|
// while (parser.hasNext())
|
|
// {
|
|
// JsonParser.Event event = parser.next();
|
|
//
|
|
// switch (event)
|
|
// {
|
|
// case START_ARRAY:
|
|
// if (!subjectStack.isEmpty() && property != null) arrayProperties.put(subjectStack.getLast(), property);
|
|
// break;
|
|
// case END_ARRAY:
|
|
// if (!subjectStack.isEmpty()) arrayProperties.remove(subjectStack.getLast());
|
|
// break;
|
|
// case START_OBJECT:
|
|
// Node subject = NodeFactory.createBlankNode();
|
|
// // add triple with current array property, if any
|
|
// if (property != null && !subjectStack.isEmpty()) rdfStream.triple(new Triple(subjectStack.getLast(), property, subject));
|
|
// subjectStack.addLast(subject);
|
|
// break;
|
|
// case END_OBJECT:
|
|
// subjectStack.removeLast();
|
|
// // restore previous array property, if there was any
|
|
// if (!subjectStack.isEmpty() && arrayProperties.containsKey(subjectStack.getLast())) property = arrayProperties.get(subjectStack.getLast());
|
|
// break;
|
|
// case VALUE_FALSE:
|
|
// rdfStream.triple(new Triple(subjectStack.getLast(), property, NodeFactory.createLiteralByValue(Boolean.FALSE, XSDDatatype.XSDboolean)));
|
|
// break;
|
|
// case VALUE_TRUE:
|
|
// rdfStream.triple(new Triple(subjectStack.getLast(), property, NodeFactory.createLiteralByValue(Boolean.TRUE, XSDDatatype.XSDboolean)));
|
|
// break;
|
|
// case KEY_NAME:
|
|
// property = NodeFactory.createURI(iriResolver.resolveToString("#" + parser.getString()));
|
|
// break;
|
|
// case VALUE_STRING:
|
|
// if (property != null) rdfStream.triple(new Triple(subjectStack.getLast(), property, NodeFactory.createLiteral(parser.getString())));
|
|
// break;
|
|
// case VALUE_NUMBER:
|
|
// try
|
|
// {
|
|
// rdfStream.triple(new Triple(subjectStack.getLast(), property,NodeFactory.createLiteralByValue(Integer.valueOf(parser.getString()), XSDDatatype.XSDint)));
|
|
// }
|
|
// catch (NumberFormatException ex)
|
|
// {
|
|
// rdfStream.triple(new Triple(subjectStack.getLast(), property,NodeFactory.createLiteralByValue(Float.valueOf(parser.getString()), XSDDatatype.XSDfloat)));
|
|
// }
|
|
// break;
|
|
// case VALUE_NULL:
|
|
// break;
|
|
// }
|
|
// }
|
|
// }
|
|
//
|
|
// protected JsonParser getParser()
|
|
// {
|
|
// return parser;
|
|
// }
|
|
//
|
|
// protected StreamRDF getStreamRDF()
|
|
// {
|
|
// return rdfStream;
|
|
// }
|
|
//
|
|
// protected IRIResolver getIRIResolver()
|
|
// {
|
|
// return iriResolver;
|
|
// }
|
|
//
|
|
//}
|