Package org.apache.any23.extractor.yaml

Class ElementsProcessor

java.lang.Object

org.apache.any23.extractor.yaml.ElementsProcessor

public class ElementsProcessor
extends Object

Converts Object into RDF graph encoded to ElementsProcessor.ModelHolder. Where key is a graph root node and value is a graph itself inside a Model. This parser performs conversion for three main types:

• List - Creates RDF:List with bnode as root
• Map - Creates simple graph where {key: value} is converted to predicate:object pair
• Simple type - Crates RDF Literal

Author:

Jacek Grzebyta (grzebyta.dev [at] gmail.com)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ElementsProcessor.ModelHolder	A model holder describes the two required parameters which makes a model useful in further processing: a root node and model itself.

Field Summary

Fields

Modifier and Type	Field	Description
protected org.eclipse.rdf4j.model.ValueFactory	vf

Method Summary

Modifier and Type	Method	Description
ElementsProcessor.ModelHolder	asModel(org.eclipse.rdf4j.model.IRI namespace, Object t, org.eclipse.rdf4j.model.Value rootNode)	Converts a data structure to ElementsProcessor.ModelHolder.
static ElementsProcessor	getInstance()
protected ElementsProcessor.ModelHolder	processList(org.eclipse.rdf4j.model.IRI ns, List<Object> object)
protected ElementsProcessor.ModelHolder	processMap(org.eclipse.rdf4j.model.IRI ns, Map<String,Object> object, org.eclipse.rdf4j.model.Value parentNode)	This method processes a map with non bnode root.

Methods inherited from class java.lang.Object

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

Field Detail

vf

protected org.eclipse.rdf4j.model.ValueFactory vf

Method Detail

asModel

public ElementsProcessor.ModelHolder asModel(org.eclipse.rdf4j.model.IRI namespace,
                                             Object t,
                                             org.eclipse.rdf4j.model.Value rootNode)

Converts a data structure to ElementsProcessor.ModelHolder. where value is a root node of the data structure and model is a content of the RDF graph. If requested object is simple object (i.e. is neither List or Map) than method returns map entry of relevant instance of Literal as key and empty model as value.

Parameters:

namespace - Namespace for predicates

t - Object (or data structure) converting to RDF graph

rootNode - root node of the graph. If not given then blank node is created.

Returns:

instance of ElementsProcessor.ModelHolder,

processMap

protected ElementsProcessor.ModelHolder processMap(org.eclipse.rdf4j.model.IRI ns,
                                                   Map<String,Object> object,
                                                   org.eclipse.rdf4j.model.Value parentNode)

This method processes a map with non bnode root. If a map has instantiated root (not a blank node) it is simpler to create SPARQL query.

Parameters:

ns - the namespace to associated with statements

object - a populated Map

parentNode - a Value subject node to use in the new statement

Returns:

instance of ElementsProcessor.ModelHolder.

processList

protected ElementsProcessor.ModelHolder processList(org.eclipse.rdf4j.model.IRI ns,
                                                    List<Object> object)

getInstance

public static final ElementsProcessor getInstance()