Package se.liu.ida.hefquin.engine.wrappers.graphql.impl

Class JSON2SolutionGraphConverterImpl

java.lang.Object

se.liu.ida.hefquin.engine.wrappers.graphql.impl.JSON2SolutionGraphConverterImpl

All Implemented Interfaces:

JSON2SolutionGraphConverter

public class JSON2SolutionGraphConverterImpl
extends Object
implements JSON2SolutionGraphConverter

An implementation of the JSON2SolutionMappings approach

Field Summary

Fields

Modifier and Type	Field	Description
protected final GraphQL2RDFConfiguration	config
protected final GraphQLSchema	schema

Constructor Summary

Constructors

Constructor	Description
JSON2SolutionGraphConverterImpl(GraphQL2RDFConfiguration config, GraphQLSchema schema)

Method Summary

Modifier and Type	Method	Description
protected org.apache.jena.rdf.model.Literal	jsonPrimitiveToLiteral(org.apache.jena.atlas.json.JsonValue primitive, String graphqlTypeName, String graphqlFieldName, org.apache.jena.rdf.model.Model model)	Utility function used to create a Literal from a json value @param primitive usable by @param model.
protected org.apache.jena.rdf.model.Resource	parseJSON(org.apache.jena.atlas.json.JsonObject root, Map<org.apache.jena.atlas.lib.PairOfSameType<String>,org.apache.jena.rdf.model.Resource> blankNodes, org.apache.jena.rdf.model.Model solutionGraph)	Parses through a JsonObject recursively and expands @param blankNodes and @param solutionGraph.
org.apache.jena.rdf.model.Model	translateJSON(org.apache.jena.atlas.json.JsonObject jsonObj)	Translates a JSON object (obtained as a response to a GraphQL request) into a solution graph (model) containing triples created by parsing the JSON object.

Methods inherited from class java.lang.Object

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

Field Details

config

protected final GraphQL2RDFConfiguration config

schema

protected final GraphQLSchema schema

Constructor Details

JSON2SolutionGraphConverterImpl

public JSON2SolutionGraphConverterImpl(GraphQL2RDFConfiguration config,
 GraphQLSchema schema)

Method Details

translateJSON

public org.apache.jena.rdf.model.Model translateJSON(org.apache.jena.atlas.json.JsonObject jsonObj)
                                              throws org.apache.jena.atlas.json.io.parserjavacc.javacc.ParseException,
org.apache.jena.atlas.json.JsonException

Description copied from interface: JSON2SolutionGraphConverter

Translates a JSON object (obtained as a response to a GraphQL request) into a solution graph (model) containing triples created by parsing the JSON object.

Specified by:

translateJSON in interface JSON2SolutionGraphConverter

Throws:

org.apache.jena.atlas.json.io.parserjavacc.javacc.ParseException - if the JSON structure for whatever reason isn't valid, thus making it un-parsable.

org.apache.jena.atlas.json.JsonException

parseJSON

protected org.apache.jena.rdf.model.Resource parseJSON(org.apache.jena.atlas.json.JsonObject root,
 Map<org.apache.jena.atlas.lib.PairOfSameType<String>,org.apache.jena.rdf.model.Resource> blankNodes,
 org.apache.jena.rdf.model.Model solutionGraph)
                                                throws org.apache.jena.atlas.json.io.parserjavacc.javacc.ParseException,
org.apache.jena.atlas.json.JsonException

Parses through a JsonObject recursively and expands @param blankNodes and @param solutionGraph.

Returns:

a Resource in order to create a triple with the parent and the child resource.

Throws:

org.apache.jena.atlas.json.io.parserjavacc.javacc.ParseException - if the json object does not contain a valid "id" key.

org.apache.jena.atlas.json.JsonException

jsonPrimitiveToLiteral

protected org.apache.jena.rdf.model.Literal jsonPrimitiveToLiteral(org.apache.jena.atlas.json.JsonValue primitive,
 String graphqlTypeName,
 String graphqlFieldName,
 org.apache.jena.rdf.model.Model model)

Utility function used to create a Literal from a json value @param primitive usable by @param model. @param graphqlTypeName and @param graphqlFieldName are used to fetch value type data from the GraphQL endpoint to ensure that the correct XML datatype is used when creating the literal.